2735:
731:
4908:
627:
4918:
4897:
4928:
746:
861:
which is not sensitive to the relative orientation of the transmitting and receiving antennas. For television broadcasting specialized vertical radiators that are mostly modifications of the slot antenna or reflective array antenna are used: the slotted cylinder, zig-zag, and panel antennas.
1272:—frequencies with a higher unlicensed power permitted for use originally by Industrial, Scientific, Medical apparatus—are now some of the most crowded in the spectrum because they are open to everyone. The 2.45 GHz frequency is the standard for use by
700:
As the visual horizon sets the maximum range of UHF transmission to between 30 and 40 miles (48 to 64 km) or less, depending on local terrain, the same frequency channels can be reused by other users in neighboring geographic areas
1917:
1397:
was completed on June 12, 2009 (formerly high-band UHF TV channels 52 to 69) and recently modified in 2021 for Next
Generation 5G UHF transmission bandwidth for 'over the air' channels 2 thru 69 (virtual 1 thru
765:
is between 2.5 and 25 cm long. UHF wavelengths are short enough that efficient transmitting antennas are small enough to mount on handheld and mobile devices, so these frequencies are used for two-way
1167:
791–862 MHz, i.e. channels 61 to 69 inclusive were previously used for licensed and shared wireless microphones (channel 69 only), has since been allocated to 4G cellular communications.
1302:
service, which was later sold to AT&T, and discontinued in 2011. Some US broadcasters had been offered incentives to vacate this channel early, permitting its immediate mobile use. The
1928:
1294:, the spectrum from 698 MHz to 806 MHz (UHF channels 52 to 69) was removed from TV broadcasting, making it available for other uses. Channel 55, for instance, was sold to
5501:
2644:
693:, the strength of UHF signals over long distances, and the attenuation increases with frequency. UHF TV signals are generally more degraded by moisture than lower bands, such as
1250:. However, because of their more limited range, and because few sets could receive them until older sets were replaced, UHF channels were less desirable to broadcasters than
1147:
1264:
There is a considerable amount of lawful unlicensed activity (cordless phones, wireless networking) clustered around 900 MHz and 2.4 GHz, regulated under
3193:
892:
Since at UHF frequencies transmitting antennas are small enough to install on portable devices, the UHF spectrum is used worldwide for land mobile radio systems,
2194:
1157:
digital TV. Channels 55 to 56 were previously used by temporary muxes COM7 and COM8, channel 38 was used for radio astronomy but has been cleared to allow
4172:
1686:
2020–2110 MHz: Cable
Antenna Relay service, Local Television Transmission service, TV Broadcast Auxiliary service, Earth Exploration Satellite service
568:; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for
2680:
2365:
1235:
2340:
1633:
in
Wallops Island, Virginia; Greenbelt, Maryland and Fairbanks, Alaska. Nationwide broadband service license in this range is held by a subsidiary of
1626:
993:
757:
is related to the length of the radio waves used. Due to the short wavelengths, UHF antennas are conveniently stubby and short; at UHF frequencies a
673:. UHF radio waves are blocked by hills and cannot travel beyond the horizon, but can penetrate foliage and buildings for indoor reception. Since the
608:
1239:
2329:
2103:
2042:
508:
4964:
4880:
4852:
4847:
3872:
3186:
2132:
2066:
2020:
1672:
1390:
1372:
1307:
1207:
5266:
1665:
1780–1850 MHz: exclusive federal use (Air Force satellite communications, Army's cellular-like communication system, other agencies)
1243:
1283:
The spectrum from 806 MHz to 890 MHz (UHF channels 70 to 83) was taken away from TV broadcast services in 1983, primarily for
5016:
1891:
3620:
2429:
1164:
694–790 MHz: i.e. Channels 49 to 60 have been cleared, to allow these channels to be allocated for 5G cellular communication.
3179:
3540:
5305:
4874:
2673:
1680:
1930–2000 MHz: PCS base stations—order is A, D, B, E, F, C, G, H blocks. A, B, C = 15 MHz; D, E, F, G, H = 5 MHz
1761:
2390–2395 MHz: Aircraft landing and safety systems (secondary deployment in a dozen of airports), amateur radio otherwise
1668:
1850–1920 MHz: PCS mobile phone—order is A, D, B, E, F, C, G, H blocks. A, B, C = 15 MHz; D, E, F, G, H = 5 MHz
5276:
4869:
4859:
4839:
4641:
3650:
2247:
1101:
17:
4006:
5325:
4931:
4864:
4710:
2302:"AT&T Mobility Petition for Limited Waiver of Interim Performance Requirement for 2.3 GHz WCS C and D Block Licenses"
2077:
1258:
1158:
822:
4636:
3205:
2161:
1622:
1668.4–1670 MHz: Radio astronomy observations. Weather balloons may utilize the spectrum after an advance notice.
4730:
2666:
1552:
1420:
862–869 MHz: ESMR band for wideband mobile services (base station) (formerly public safety and commercial 2-way)
1404:
817–824 MHz: ESMR band for wideband mobile services (mobile phone) (formerly public safety and commercial 2-way)
1303:
932:
501:
1246:. Since 1962, UHF channel tuners (at the time, channels 14 to 83) have been required in television receivers by the
725:
4957:
4515:
4063:
3865:
1996:
1634:
1140:
457–464 MHz: Scanning telemetry and telecontrol, assigned mostly to the water, gas, and electricity industries
4626:
3535:
3388:
3384:
1833:
1592:
1291:
5541:
5438:
4621:
3699:
1901:
1838:
1573:
1448:
677:
of UHF waves are comparable to the size of buildings, trees, vehicles and other common objects, reflection and
5286:
4646:
3670:
3499:
2162:"TerreStar Corporation Request for Temporary Waiver of Substantial Service Requirements for 1.4 GHz Licenses"
615:
as frequencies between 300 MHz and 1 GHz. Two other IEEE radar bands overlap the ITU UHF band: the
1978:
5213:
4921:
4682:
4579:
4122:
3917:
3889:
3742:
3443:
3213:
2422:
1843:
1340:
1284:
901:
896:
used for voice communication for commercial, industrial, public safety, and military purposes. Examples of
494:
1193:
870–960 MHz: Cellular communications (GSM900 - Vodafone and O2 only) including GSM-R and future TETRA
5511:
4950:
4911:
4418:
3858:
3640:
2781:
2620:
870:
569:
1407:
824–849 MHz: Cellular A & B franchises, terminal (mobile phone) (formerly TV channels 73 to 77)
5484:
5453:
5198:
5108:
4770:
4692:
4631:
4338:
3478:
3266:
3256:
3251:
3246:
3236:
3231:
3226:
3221:
2776:
1829:
1690:
1648:
1526:
1525:
1435–1525 MHz: Military use mostly for aeronautical mobile telemetry (therefore not available for
1017:
4542:
4503:
4348:
4248:
4177:
4110:
3937:
3453:
2301:
1953:
1792:
1559:
1121:
882:
654:
565:
1458:, alarm monitoring, meter reading systems and other narrowband services for a company's internal use
4901:
4143:
4078:
4031:
3991:
3076:
2689:
2605:
1247:
838:
834:
767:
438:
261:
5536:
5463:
5362:
5315:
5223:
4740:
4725:
4569:
4520:
4443:
4343:
4021:
3907:
3902:
3772:
3645:
3126:
2455:
2415:
1715:
1322:
1075:
807:
762:
207:
1381:
652–663 MHz: Wireless microphones (higher priority) and unlicensed devices (lower priority)
5357:
5271:
5113:
4662:
4448:
4263:
4208:
4203:
4016:
3981:
3694:
3660:
3655:
3615:
3468:
3408:
1427:
1411:
1095:
1051:
1010:
897:
709:
are used to retransmit UHF signals when a distance greater than the line of sight is required.
581:
1354:
2-way radio in 12 major metropolitan areas scheduled to relocate to 700 MHz band by 2023)
5458:
5281:
5261:
4564:
4368:
4333:
4253:
4233:
4155:
4043:
3964:
3829:
3566:
1519:
1503:
1423:
869–894 MHz: Cellular A & B franchises, base station (formerly TV channels 80 to 83)
858:
686:
3897:
1660:
1755–1780 MHz: AWS-3 blocks G, H, I, J (various federal agencies transitioning by 2025)
1499:
1350–1390 MHz: Military air traffic control and mobile telemetry systems at test ranges
5026:
5011:
5006:
4478:
4438:
4408:
4165:
4100:
3922:
3808:
3793:
3556:
3530:
3438:
3081:
2590:
1344:
1265:
1027:
Many other frequency assignments for Canada and Mexico are similar to their US counterparts
830:
799:
713:
635:
553:
256:
28:
8:
5193:
5064:
4488:
4428:
4187:
4149:
3947:
3932:
3747:
3709:
3610:
3570:
3121:
3116:
3091:
3071:
2822:
2560:
2485:
2470:
2222:
1176:
818:
694:
561:
377:
266:
244:
217:
212:
4942:
3171:
5330:
4715:
4672:
4603:
4473:
4403:
4378:
4313:
4160:
3881:
3635:
3585:
3111:
2959:
2932:
2842:
2827:
2500:
1784:
1765:
1721:
1675:
1490:
1470:
932–935 MHz: Fixed microwave services: distribution of video, audio and other data
1444:
1394:
1330:
1222:
1210:
1197:
1183:
1128:
1107:
1071:
1044:
874:
803:
631:
222:
3316:
5546:
5443:
5402:
5320:
4755:
4677:
4591:
4574:
4537:
4383:
4213:
4182:
4048:
3942:
3762:
3719:
3580:
3575:
3202:
2967:
2963:
2944:
2940:
2936:
2272:
1897:
854:
846:
712:
Occasionally when conditions are right, UHF radio waves can travel long distances by
678:
648:
5397:
4423:
1619:
1660.5–1668.4 MHz: Radio astronomy observations. Transmitting is not permitted.
1417:
851–861 MHz: Public safety and commercial 2-way (formerly TV channels 77 to 80)
1401:
806–816 MHz: Public safety and commercial 2-way (formerly TV channels 70 to 72)
927:
low band operates between 2,412 and 2,484 MHz. A second widespread use is for
612:
362:
5479:
5423:
5392:
5237:
5048:
4973:
4760:
4720:
4700:
4667:
4596:
4554:
4468:
4323:
4308:
4283:
4258:
4218:
4068:
3927:
3912:
3689:
3630:
3473:
3423:
3101:
2872:
2847:
2715:
2530:
947:
886:
826:
806:(PIFA) used in cellphones. Higher gain omnidirectional UHF antennas can be made of
758:
277:
234:
5382:
741:
operating on 462 and 467 MHz in the UHF band, showing the short antennas used
5448:
5418:
5054:
4388:
4243:
4011:
3986:
3974:
3788:
3680:
3605:
3561:
3428:
3150:
3063:
2905:
2837:
1796:
1738:
1638:
1603:
1537:
1365:
951:
850:
779:
754:
702:
601:
533:
196:
2393:
5058:
4586:
4458:
4433:
4393:
4363:
4238:
4073:
4026:
4001:
3959:
3767:
3595:
3509:
3398:
3096:
2880:
2545:
2438:
1800:
1273:
1187:
811:
795:
783:
658:
597:
372:
239:
189:
745:
5530:
5433:
5158:
5038:
4977:
4735:
4508:
4498:
4413:
4303:
4298:
4288:
4273:
4095:
3954:
3483:
3433:
3312:
3302:
3298:
3294:
3290:
3286:
3282:
3278:
3274:
3270:
3260:
3240:
3106:
3043:
3024:
2928:
2862:
2857:
2852:
2515:
1864:"IEEE 521-2002 - IEEE Standard Letter Designations for Radar-Frequency Bands"
1819:
2690–2700 MHz: Receive-only range for radio astronomy and space research
1630:
1326:
1154:
1067:
893:
775:
771:
738:
730:
593:
415:
397:
352:
347:
342:
337:
332:
327:
322:
317:
312:
307:
302:
297:
292:
287:
229:
174:
108:
104:
100:
96:
2734:
5505:
4980:
4613:
4453:
4398:
4328:
4293:
4228:
4127:
4117:
3969:
3834:
3625:
3514:
3448:
3418:
3343:
2982:
2977:
2955:
2950:
2658:
2648:
1863:
1350:
470–512 MHz: Low-band TV channels 14 to 20 (shared with public safety
920:
842:
791:
115:
1813:
downlink and
Terrestrial Low Power Service suitable for TD-LTE small cells
1711:
satellite tracking, telemetry and control (space-to-Earth, space-to-space)
1512:
1400–1427 MHz: Earth exploration, radio astronomy, and space research
950:
use UHF, the frequencies varying among different carriers and countries.
5428:
5253:
5044:
4813:
4463:
4373:
4358:
4318:
4278:
4137:
3803:
3798:
3737:
3463:
3403:
3393:
3155:
2832:
2814:
2710:
2400:
1997:"Decision to make the 700 MHz band available for mobile data - statement"
1776:
1351:
1315:
924:
878:
690:
670:
573:
1755:
2350–2360 MHz: WCS mobile broadband service downlink blocks A and B
790:. Omnidirectional UHF antennas used on mobile devices are usually short
5310:
5296:
4998:
4818:
4525:
4223:
4132:
4088:
4058:
4036:
3732:
3665:
3600:
3413:
3136:
2804:
2799:
2753:
2730:
2407:
1810:
1749:
1731:
1585:
1476:
940–941 MHz: Narrowband PCS: commercial narrowband mobile services
1464:
930–931 MHz: Narrowband PCS: commercial narrowband mobile services
1436:
901–902 MHz: Narrowband PCS: commercial narrowband mobile services
1361:
1257:
A complete list of US Television
Frequency allocations can be found at
1088:
787:
689:, especially in built-up urban areas. Atmospheric moisture reduces, or
674:
662:
1816:
2495–2690 MHz: Educational
Broadcast and Broadband Radio Services
1727:
2305–2315 MHz: WCS mobile broadband service uplink blocks A and B
1292:
transition from analog to digital over-the-air broadcast of television
1218:
2110–2170 MHz: 3G cellular communications (base station downlink)
1013:(with select channels in the 600 & 700 MHz bands left vacant)
5373:
5232:
4803:
4268:
4083:
3850:
3839:
3824:
3757:
3752:
3727:
3145:
2992:
2768:
2746:
2725:
2700:
1954:"Digital Audio Broadcasting (DAB) - History of Canadian Broadcasting"
1788:
1742:
1277:
928:
626:
589:
557:
549:
548:
as the wavelengths range from one meter to one tenth of a meter (one
541:
537:
80:
1371:
614–698 MHz: Mobile broadband shared with TV channels 38 to 51
1215:
1900–1980 MHz: 3G cellular communications (mobile phone uplink)
5123:
5076:
5034:
4798:
4788:
4705:
4530:
4353:
3590:
3458:
3308:
3160:
2920:
2720:
1772:
1599:
1533:
1440:
1334:
1299:
1295:
1269:
1038:
936:
706:
466:
1134:
446.0–446.2 MHz : European unlicensed PMR service =>
5163:
5118:
5072:
4793:
4778:
3996:
3363:
3029:
3015:
1566:
1518:
1432–1435 MHz: Proposed wireless medical telemetry service.
1502:
1390–1395 MHz: Proposed wireless medical telemetry service.
666:
552:). Radio waves with frequencies above the UHF band fall into the
481:
471:
461:
420:
407:
877:, although much of the former bandwidth has been reallocated to
5387:
5203:
5177:
5172:
5131:
5082:
5068:
4823:
4783:
4105:
3338:
3053:
3048:
3038:
3010:
3005:
3000:
2971:
2900:
1804:
1135:
1081:
1021:
986:
959:
955:
909:
905:
682:
620:
616:
476:
456:
433:
428:
402:
392:
387:
170:
119:
5208:
5103:
4995:
4808:
4745:
4053:
3504:
3368:
3358:
3353:
2895:
2791:
2705:
2078:"Federal Government Spectrum Use Reports 225 MHz – 7.125 GHz"
1480:
1455:
1180:
916:
825:
communication links and UHF television reception are usually
585:
76:
61:
57:
560:
frequency range. Lower frequency signals fall into the VHF (
4750:
3333:
2890:
2885:
2366:"Broadband Radio Service & Education Broadband Service"
2081:
1868:
1708:
1683:
2000–2020 MHz: lower AWS-4 downlink (mobile broadband)
1172:
863–865 MHz: Used for licence-exempt wireless systems.
735:
1426:
894–896 MHz: Commercial aviation air-ground systems (
1410:
849–851 MHz: Commercial aviation air-ground systems (
4972:
3348:
3201:
2910:
1780:
1251:
923:) networks in homes, offices, and public places. Wi-fi
577:
529:
2195:"Ligado Ex Parte re Iridium Analysis (PUBLIC 11-2-2016)"
1479:
941–960 MHz: Mixed studio-transmitter fixed links,
1203:
1710–1880 MHz: 2G Cellular communications (GSM1800)
965:
1758:
2360–2390 MHz: Aircraft landing and safety systems
1143:
606–614 MHz: Radio microphones and radio-astronomy
944:
940:
1748:
2345–2350 MHz: WCS block D (AT&T is pursuing
1730:
2315–2320 MHz: WCS block C (AT&T is pursuing
1515:
1427–1432 MHz: Wireless medical telemetry service
1509:
1395–1400 MHz: Wireless medical telemetry service
1153:
Currently channels 21 to 37 and 39 to 48 are used for
931:, allowing handheld mobile phones be connected to the
716:
as the atmosphere warms and cools throughout the day.
653:
Radio waves in the UHF band travel almost entirely by
564:) or lower bands. UHF radio waves propagate mainly by
2043:"Going Once…Going Twice…The 700 Mhz Spectrum is Sold"
1637:
who is trying to provide service in cooperation with
810:
of dipoles and are used for mobile base stations and
979:
450.4875–451.5125 MHz:Fixed point-to-point link
1522:
failed to provide service by the required deadline.
1506:
failed to provide service by the required deadline.
1378:
617–652 MHz: Mobile broadband service downlink
2248:"Request for waiver and public interest statement"
1357:512–608 MHz: Medium-band TV channels 21 to 36
1696:2110–2155 MHz: AWS-1 blocks A, B, C, D, E, F
1657:1710–1755 MHz: AWS-1 blocks A, B, C, D, E, F
1627:Geostationary Operational Environmental Satellite
1384:663–698 MHz: Mobile broadband service uplink
1006:430–450 MHz: Amateur radio (70 cm band)
821:to be conveniently small. High gain antennas for
5528:
2401:Definition of frequency bands (VLF, ELF... etc.)
1644:1675–1695 MHz: Meteorological federal users
1612:1646.5–1656.5 MHz: proposed Ligado uplink 2
1609:1627.5–1637.5 MHz: proposed Ligado uplink 1
982:457.50625–459.9875 MHz: Land mobile service
1606:is seeking FCC permission for terrestrial use)
1581:1610–1660.5 MHz: Mobile Satellite Service
1540:is seeking FCC permission for terrestrial use)
1486:960–1215 MHz: Aeronautical radionavigation
1393:; bidders got full use after the transition to
1254:channels (and licenses sold for lower prices).
849:become practical. For satellite communication,
661:band there is little to no reflection from the
634:on a residence. This type of antenna, called a
915:The most rapidly-expanding use of the band is
642:
4958:
3866:
3187:
2674:
2423:
726:UHF television broadcasting § UHF vs VHF
502:
2688:
1543:1526–1536 MHz: proposed Ligado downlink
1496:1300–1350 MHz: Long range radar systems
1321:420–450 MHz: Government radiolocation,
1318:, military aviation, and federal two-way use
1314:225–420 MHz: Government use, including
1276:, adjacent to the frequencies allocated for
1084:Personal Radio Service (Land mobile service)
976:406–406.1 MHz: Mobile satellite service
4881:Global telecommunications regulation bodies
2133:"Wireless Medical Telemetry Service (WMTS)"
2070:
2023:. The Office of Communications. May 9, 2012
1699:2155–2180 MHz: AWS-3 blocks G, H, I, J
857:are used since satellites typically employ
657:(LOS) and ground reflection; unlike in the
4965:
4951:
4917:
3873:
3859:
3194:
3180:
2750:
2681:
2667:
2430:
2416:
1654:1695–1755 MHz: AWS-3 blocks A1 and B1
749:Corner reflector UHF-TV antenna from 1950s
509:
495:
27:"UHF" redirects here. For other uses, see
2394:U.S. cable television channel frequencies
1308:auction for this newly available spectrum
1161:users access on a licensed, shared basis.
3621:Output power of an analog TV transmitter
2437:
1651:mobile phone uplink (UL) operating band
1473:935–940 MHz: Commercial 2-way radio
1433:896–901 MHz: Commercial 2-way radio
744:
729:
625:
2040:
1896:. John Wiley and Sons. pp. 55–58.
1889:
1546:1536–1559 MHz: proposed guard band
1063:406.1–420 MHz: Land mobile service
14:
5529:
3880:
2021:"800 MHz & 2.6 GHz Combined Award"
1883:
1375:. TV stations were relocated by 2020.
1146:470–862 MHz: Previously used for
5343:
4946:
3854:
3651:Direct-broadcast satellite television
3175:
2662:
2411:
2296:
2294:
2189:
2187:
2185:
2156:
2154:
1779:, 802.11b, 802.11g, 802.11n wireless
1347:2-way "walkie-talkies", public safety
1339:450–470 MHz: UHF business band,
966:Examples of UHF frequency allocations
278:EU / NATO / US ECM
34:Electromagnetic spectrum 300–3000 MHz
4927:
1039:Terrestrial Trunked Radio for Police
638:, is widely used at UHF frequencies.
576:, satellite communication including
3541:Vestigial sideband modulation (VSB)
2346:from the original on August 2, 2017
1856:
1764:2395–2400 MHz: Amateur radio (
1720:2300–2305 MHz: Amateur radio (
1553:Radio Navigation Satellite Services
1489:1240–1300 MHz: Amateur radio (
1259:Pan-American television frequencies
1221:2310–2450 MHz: Amateur radio (
1196:1240–1325 MHz: Amateur radio (
1106:1240–1300 MHz: Amateur radio (
604:, and numerous other applications.
24:
5344:
2733:
2291:
2182:
2151:
25:
5558:
2387:
2137:Federal Communications Commission
1576:E1 band (overlapping with GPS L1)
1127:430–440 MHz: Amateur radio (
1124:(TETRA) service for emergency use
1114:
1043:430-440 MHz: Amateur radio (
933:public switched telephone network
817:The short wavelengths also allow
619:between 1 and 2 GHz and the
5499:
4926:
4916:
4907:
4906:
4895:
4516:Free-space optical communication
2642:
2041:Hansell, Saul (March 18, 2008).
1635:Crown Castle International Corp.
1229:
3536:Quadrature amplitude modulation
2358:
2322:
2265:
2240:
2215:
2125:
2096:
1702:2180–2200 MHz: upper AWS-4
1447:), cordless phones and stereo,
1236:digital television broadcasting
954:also use this frequency in the
865:
5439:Error detection and correction
3700:Television channel frequencies
2060:
2034:
2013:
1989:
1971:
1946:
1910:
1893:Introduction to RF Propagation
1839:Digital terrestrial television
1449:radio-frequency identification
1368:and wireless medical telemetry
1057:
841:. At the top end of the band,
812:cellular base station antennas
778:in vehicles, and for portable
536:in the range between 300
13:
1:
3671:Digital television transition
3500:Multichannel television sound
2404:". IK1QFK Home Page (vlf.it).
1849:
1310:was completed in March 2008.
1087:485–502 MHz: Analog and
681:from these objects can cause
4902:Telecommunication portal
4683:Telecommunications equipment
3743:Field strength in free space
3444:Horizontal blanking interval
1844:The Thing (listening device)
1341:General Mobile Radio Service
1102:Aeronautical radionavigation
970:
7:
5512:Comparison of radio systems
4419:Alexander Stepanovich Popov
3641:Superheterodyne transmitter
2782:Ultra-high-energy gamma ray
1979:"What is 700MHz Clearance?"
1823:
1391:Was auctioned in March 2008
996:for television broadcasting
871:UHF television broadcasting
719:
643:Propagation characteristics
130:Ultra high frequency (IEEE)
10:
5563:
5485:International broadcasting
5454:FM extended band in Brazil
4123:Telecommunications history
3479:Vertical blanking interval
2777:Very-high-energy gamma ray
1830:Digital Audio Broadcasting
1693:mobile broadband downlink
1527:Digital Audio Broadcasting
1234:UHF channels are used for
1148:analogue TV channels 21–69
1018:Digital Audio Broadcasting
723:
646:
623:between 2 and 4 GHz.
45:Ultra high frequency (ITU)
26:
5493:
5472:
5411:
5371:
5350:
5339:
5295:
5252:
5222:
5186:
5151:
5144:
5096:
5025:
4994:
4987:
4890:
4832:
4769:
4731:Public Switched Telephone
4691:
4655:
4612:
4553:
4543:telecommunication circuit
4504:Fiber-optic communication
4487:
4249:Francis Blake (telephone)
4196:
4044:Optical telecommunication
3888:
3817:
3781:
3718:
3679:
3549:
3523:
3492:
3454:Nominal analogue blanking
3377:
3326:
3212:
3135:
3062:
2991:
2919:
2871:
2813:
2790:
2767:
2696:
2638:
2446:
1890:Seybold, John S. (2005).
1793:radio-controlled aircraft
1244:cable television channels
1122:Terrestrial Trunked Radio
1031:
1000:
839:reflective array antennas
768:land mobile radio systems
655:line-of-sight propagation
544:(GHz), also known as the
158:
146:
134:
129:
87:
68:
49:
44:
4642:Orbital angular-momentum
4079:Satellite communications
3918:Communications satellite
2690:Electromagnetic spectrum
1834:regional implementations
1598:1626.5–1660.5 MHz:
1467:931–932 MHz: Pagers
1461:929–930 MHz: Pagers
1290:In 2009, as part of the
1248:All-Channel Receiver Act
879:land mobile radio system
5464:Shortwave relay station
5363:Audio signal processing
4521:Molecular communication
4344:Gardiner Greene Hubbard
4173:Undersea telegraph line
3908:Cable protection system
3773:Television interference
3646:Television receive-only
1958:Broadcasting-history.ca
1716:NASA Deep Space Network
1629:transmissions to three
1529:, unlike Canada/Europe)
1373:auctioned in April 2017
1323:amateur radio satellite
1285:analog mobile telephony
1076:amateur radio satellite
898:personal radio services
763:omnidirectional antenna
582:personal radio services
570:television broadcasting
5358:Audio data compression
4663:Communication protocol
4449:Charles Sumner Tainter
4264:Walter Houser Brattain
4209:Edwin Howard Armstrong
4017:Information revolution
3695:Microwave transmission
3661:Terrestrial television
3656:Television transmitter
3616:Intermediate frequency
3409:Chrominance subcarrier
2738:
1809:2483.5–2495 MHz:
1771:2400–2483.5 MHz:
1591:1618–1626.5 MHz:
1096:Terrestrial television
1091:Emergency services use
1052:Terrestrial television
1011:Terrestrial television
873:channels are used for
750:
742:
639:
5542:Television technology
5459:Multipath propagation
5282:MPEG-1 Audio Layer II
5152:Frequency allocations
5027:Frequency allocations
4637:Polarization-division
4369:Narinder Singh Kapany
4334:Erna Schneider Hoover
4254:Jagadish Chandra Bose
4234:Alexander Graham Bell
3965:online video platform
3567:Broadcast transmitter
2737:
2330:"Globalstar Overview"
2223:"Galileo Signal Plan"
2084:. Dec 2015 – Aug 2017
2047:Bits.blos.nytimes.com
1240:over the air channels
989:(Land mobile service)
859:circular polarization
800:rubber ducky antennas
759:quarter-wave monopole
748:
733:
687:multipath propagation
629:
5412:Technical (emission)
4479:Vladimir K. Zworykin
4439:Almon Brown Strowger
4409:Charles Grafton Page
4064:Prepaid mobile phone
3992:Electrical telegraph
3809:Zero reference pulse
3794:Field strength meter
3531:Frequency modulation
3439:Horizontal scan rate
1737:2320–2345 MHz:
1714:2290–2300 MHz:
1707:2200–2290 MHz:
1689:2110–2200 MHz:
1671:1920–1930 MHz:
1647:1695–1780 MHz:
1625:1670–1675 MHz:
1572:1559–1591 MHz:
1565:1593–1610 MHz:
1558:1563–1587 MHz:
1555:(RNSS) Upper L-band
1551:1559–1610 MHz:
1532:1525–1559 MHz:
1345:Family Radio Service
1266:Title 47 CFR Part 15
1206:1880–1900 MHz:
1120:380–399.9 MHz:
1016:1452–1492 MHz:
714:tropospheric ducting
554:super-high frequency
522:Ultra high frequency
39:Ultra high frequency
29:UHF (disambiguation)
18:Ultra-high frequency
4429:Johann Philipp Reis
4188:Wireless revolution
4150:The Telephone Cases
4007:Hydraulic telegraph
3748:Noise (electronics)
3611:Intercarrier method
3571:Transmitter station
3206:broadcasting topics
2823:Extreme ultraviolet
1595:uplink and downlink
1177:Short range devices
1100:960–1215 MHz:
562:very high frequency
41:
4627:Frequency-division
4604:Telephone exchange
4474:Charles Wheatstone
4404:Jun-ichi Nishizawa
4379:Innocenzo Manzetti
4314:Reginald Fessenden
4049:Optical telegraphy
3882:Telecommunications
3636:Split sound system
3586:Differential phase
2828:Vacuum ultraviolet
2739:
2398:Tomislav Stimac, "
2279:. January 29, 2015
2273:"AWS-3 Transition"
1785:IEEE 802.15.4-2006
1676:cordless telephone
1454:928–929 MHz:
1439:902–928 MHz:
1389:698–806 MHz:
1360:608–614 MHz:
1211:cordless telephone
1175:863–870 MHz:
1094:510–622 MHz:
1080:476–477 MHz:
1066:430–440 MHz:
1050:470-694 MHz:
1037:380-400 MHz:
1009:470–806 MHz:
992:503–694 MHz:
985:476–477 MHz:
875:digital television
855:turnstile antennas
819:high gain antennas
804:inverted F antenna
761:, the most common
751:
743:
640:
632:television antenna
448:Other TV and radio
37:
5524:
5523:
5520:
5519:
5444:FM broadcast band
5351:Technical (audio)
5248:
5247:
5140:
5139:
4940:
4939:
4678:Store and forward
4673:Data transmission
4587:Network switching
4538:Transmission line
4384:Guglielmo Marconi
4349:Internet pioneers
4214:Mohamed M. Atalla
4183:Whistled language
3848:
3847:
3763:Radiation pattern
3581:Differential gain
3203:Analog television
3169:
3168:
2873:Visible (optical)
2656:
2655:
2633:
2632:
2139:. 3 November 2011
1443:, amateur radio (
1280:network devices.
987:UHF citizens band
948:cellular networks
835:corner reflectors
753:The length of an
669:propagation), or
649:Radio propagation
540:(MHz) and 3
534:radio frequencies
519:
518:
272:
271:
184:
183:
16:(Redirected from
5554:
5506:Radio portal
5504:
5503:
5502:
5480:History of radio
5424:AM expanded band
5341:
5340:
5224:Commercial radio
5149:
5148:
4992:
4991:
4967:
4960:
4953:
4944:
4943:
4930:
4929:
4920:
4919:
4910:
4909:
4900:
4899:
4898:
4771:Notable networks
4761:Wireless network
4701:Cellular network
4693:Types of network
4668:Computer network
4555:Network topology
4469:Thomas A. Watson
4324:Oliver Heaviside
4309:Philo Farnsworth
4284:Daniel Davis Jr.
4259:Charles Bourseul
4219:John Logie Baird
3928:Data compression
3923:Computer network
3875:
3868:
3861:
3852:
3851:
3690:Frequency offset
3631:Residual carrier
3576:Cavity amplifier
3474:Television lines
3196:
3189:
3182:
3173:
3172:
2760:
2758:
2751:
2744:
2683:
2676:
2669:
2660:
2659:
2649:Radio portal
2647:
2646:
2645:
2449:
2448:
2432:
2425:
2418:
2409:
2408:
2381:
2380:
2378:
2377:
2362:
2356:
2355:
2353:
2351:
2345:
2334:
2326:
2320:
2319:
2317:
2315:
2306:
2298:
2289:
2288:
2286:
2284:
2269:
2263:
2262:
2260:
2259:
2244:
2238:
2237:
2235:
2233:
2219:
2213:
2212:
2210:
2208:
2199:
2191:
2180:
2179:
2177:
2176:
2166:
2158:
2149:
2148:
2146:
2144:
2129:
2123:
2122:
2120:
2118:
2113:. March 15, 2013
2108:
2100:
2094:
2093:
2091:
2089:
2074:
2068:
2064:
2058:
2057:
2055:
2053:
2038:
2032:
2031:
2029:
2028:
2017:
2011:
2010:
2008:
2006:
2001:
1993:
1987:
1986:
1975:
1969:
1968:
1966:
1964:
1950:
1944:
1943:
1941:
1939:
1934:on April 4, 2019
1933:
1927:. Archived from
1922:
1914:
1908:
1907:
1887:
1881:
1880:
1878:
1876:
1860:
1768:, upper segment)
1724:, lower segment)
1186:devices such as
952:Satellite phones
887:mobile telephone
847:parabolic dishes
808:collinear arrays
780:wireless devices
636:Yagi–Uda antenna
611:defines the UHF
602:satellite phones
532:designation for
511:
504:
497:
204:
203:
186:
185:
154:
148:Wavelength range
142:
141:300 MHz to 1 GHz
83:
70:Wavelength range
64:
42:
40:
36:
21:
5562:
5561:
5557:
5556:
5555:
5553:
5552:
5551:
5527:
5526:
5525:
5516:
5500:
5498:
5489:
5468:
5449:FM broadcasting
5419:AM broadcasting
5407:
5367:
5346:
5335:
5291:
5244:
5218:
5187:Digital systems
5182:
5167:
5136:
5097:Digital systems
5092:
5021:
4983:
4971:
4941:
4936:
4896:
4894:
4886:
4828:
4765:
4687:
4651:
4608:
4557:
4549:
4490:
4483:
4389:Robert Metcalfe
4244:Tim Berners-Lee
4192:
4012:Information Age
3884:
3879:
3849:
3844:
3813:
3789:Distortionmeter
3777:
3714:
3675:
3606:Frequency mixer
3562:Antenna (radio)
3545:
3519:
3488:
3429:Composite video
3373:
3322:
3208:
3200:
3170:
3165:
3131:
3058:
3033:
3019:
2987:
2915:
2867:
2809:
2786:
2763:
2756:
2749:
2742:
2740:
2692:
2687:
2657:
2652:
2643:
2641:
2634:
2629:
2626:
2625:300 GHz/1 mm
2624:
2614:
2611:
2609:
2599:
2596:
2594:
2584:
2581:
2580:300 MHz/1 m
2579:
2569:
2566:
2564:
2554:
2551:
2549:
2539:
2536:
2535:300 kHz/1 km
2534:
2524:
2521:
2519:
2509:
2506:
2504:
2494:
2491:
2490:300 Hz/1 Mm
2489:
2479:
2476:
2474:
2464:
2461:
2459:
2442:
2436:
2390:
2385:
2384:
2375:
2373:
2372:. February 2016
2364:
2363:
2359:
2349:
2347:
2343:
2332:
2328:
2327:
2323:
2313:
2311:
2309:Ecfsapi.fcc.gov
2304:
2300:
2299:
2292:
2282:
2280:
2271:
2270:
2266:
2257:
2255:
2246:
2245:
2241:
2231:
2229:
2221:
2220:
2216:
2206:
2204:
2202:Ecfsapi.fcc.gov
2197:
2193:
2192:
2183:
2174:
2172:
2164:
2160:
2159:
2152:
2142:
2140:
2131:
2130:
2126:
2116:
2114:
2106:
2104:"T-Band Report"
2102:
2101:
2097:
2087:
2085:
2076:
2075:
2071:
2065:
2061:
2051:
2049:
2039:
2035:
2026:
2024:
2019:
2018:
2014:
2004:
2002:
1999:
1995:
1994:
1990:
1977:
1976:
1972:
1962:
1960:
1952:
1951:
1947:
1937:
1935:
1931:
1920:
1916:
1915:
1911:
1904:
1888:
1884:
1874:
1872:
1862:
1861:
1857:
1852:
1826:
1801:microwave ovens
1797:spread spectrum
1766:13 cm band
1739:Satellite radio
1722:13 cm band
1639:Ligado Networks
1491:23 cm band
1445:33 cm band
1366:radio astronomy
1331:70 cm band
1274:microwave ovens
1232:
1223:13 cm band
1198:23 cm band
1129:70 cm band
1117:
1108:23 cm band
1072:70 cm band
1060:
1045:70 cm band
1034:
1003:
973:
968:
868:
784:cordless phones
728:
722:
703:frequency reuse
651:
645:
598:cordless phones
515:
486:
443:
424:
411:
357:
180:
161:
152:
149:
140:
137:
136:Frequency range
125:
90:
74:
71:
55:
52:
51:Frequency range
38:
35:
32:
23:
22:
15:
12:
11:
5:
5560:
5550:
5549:
5544:
5539:
5537:Radio spectrum
5522:
5521:
5518:
5517:
5515:
5514:
5509:
5494:
5491:
5490:
5488:
5487:
5482:
5476:
5474:
5470:
5469:
5467:
5466:
5461:
5456:
5451:
5446:
5441:
5436:
5431:
5426:
5421:
5415:
5413:
5409:
5408:
5406:
5405:
5400:
5398:Kahn-Hazeltine
5395:
5390:
5385:
5379:
5377:
5369:
5368:
5366:
5365:
5360:
5354:
5352:
5348:
5347:
5345:Related topics
5337:
5336:
5334:
5333:
5328:
5323:
5318:
5313:
5308:
5302:
5300:
5293:
5292:
5290:
5289:
5284:
5279:
5274:
5269:
5264:
5258:
5256:
5250:
5249:
5246:
5245:
5243:
5242:
5241:
5240:
5229:
5227:
5220:
5219:
5217:
5216:
5211:
5206:
5201:
5196:
5190:
5188:
5184:
5183:
5181:
5180:
5175:
5170:
5165:
5161:
5155:
5153:
5146:
5142:
5141:
5138:
5137:
5135:
5134:
5129:
5126:
5121:
5116:
5111:
5106:
5100:
5098:
5094:
5093:
5091:
5090:
5080:
5062:
5052:
5042:
5031:
5029:
5023:
5022:
5020:
5019:
5014:
5009:
5003:
5001:
4989:
4985:
4984:
4970:
4969:
4962:
4955:
4947:
4938:
4937:
4935:
4934:
4924:
4914:
4904:
4891:
4888:
4887:
4885:
4884:
4877:
4872:
4867:
4862:
4857:
4856:
4855:
4850:
4842:
4836:
4834:
4830:
4829:
4827:
4826:
4821:
4816:
4811:
4806:
4801:
4796:
4791:
4786:
4781:
4775:
4773:
4767:
4766:
4764:
4763:
4758:
4753:
4748:
4743:
4738:
4733:
4728:
4723:
4718:
4713:
4708:
4703:
4697:
4695:
4689:
4688:
4686:
4685:
4680:
4675:
4670:
4665:
4659:
4657:
4653:
4652:
4650:
4649:
4644:
4639:
4634:
4629:
4624:
4622:Space-division
4618:
4616:
4610:
4609:
4607:
4606:
4601:
4600:
4599:
4594:
4584:
4583:
4582:
4572:
4567:
4561:
4559:
4551:
4550:
4548:
4547:
4546:
4545:
4535:
4534:
4533:
4523:
4518:
4513:
4512:
4511:
4501:
4495:
4493:
4485:
4484:
4482:
4481:
4476:
4471:
4466:
4461:
4459:Camille Tissot
4456:
4451:
4446:
4441:
4436:
4434:Claude Shannon
4431:
4426:
4424:Tivadar Puskás
4421:
4416:
4411:
4406:
4401:
4396:
4394:Antonio Meucci
4391:
4386:
4381:
4376:
4371:
4366:
4364:Charles K. Kao
4361:
4356:
4351:
4346:
4341:
4339:Harold Hopkins
4336:
4331:
4326:
4321:
4316:
4311:
4306:
4301:
4296:
4291:
4286:
4281:
4276:
4271:
4266:
4261:
4256:
4251:
4246:
4241:
4239:Emile Berliner
4236:
4231:
4226:
4221:
4216:
4211:
4206:
4200:
4198:
4194:
4193:
4191:
4190:
4185:
4180:
4178:Videotelephony
4175:
4170:
4169:
4168:
4163:
4153:
4146:
4141:
4135:
4130:
4125:
4120:
4115:
4114:
4113:
4108:
4103:
4093:
4092:
4091:
4081:
4076:
4074:Radiotelephone
4071:
4066:
4061:
4056:
4051:
4046:
4041:
4040:
4039:
4029:
4024:
4019:
4014:
4009:
4004:
3999:
3994:
3989:
3984:
3979:
3978:
3977:
3972:
3967:
3962:
3960:Internet video
3952:
3951:
3950:
3945:
3940:
3935:
3925:
3920:
3915:
3910:
3905:
3900:
3894:
3892:
3886:
3885:
3878:
3877:
3870:
3863:
3855:
3846:
3845:
3843:
3842:
3837:
3832:
3827:
3821:
3819:
3815:
3814:
3812:
3811:
3806:
3801:
3796:
3791:
3785:
3783:
3779:
3778:
3776:
3775:
3770:
3765:
3760:
3755:
3750:
3745:
3740:
3735:
3730:
3724:
3722:
3716:
3715:
3713:
3712:
3707:
3702:
3697:
3692:
3686:
3684:
3677:
3676:
3674:
3673:
3668:
3663:
3658:
3653:
3648:
3643:
3638:
3633:
3628:
3623:
3618:
3613:
3608:
3603:
3598:
3596:Dipole antenna
3593:
3588:
3583:
3578:
3573:
3564:
3559:
3553:
3551:
3547:
3546:
3544:
3543:
3538:
3533:
3527:
3525:
3521:
3520:
3518:
3517:
3512:
3510:Sound-in-Syncs
3507:
3502:
3496:
3494:
3490:
3489:
3487:
3486:
3481:
3476:
3471:
3466:
3461:
3456:
3451:
3446:
3441:
3436:
3431:
3426:
3421:
3416:
3411:
3406:
3401:
3399:Blanking level
3396:
3391:
3381:
3379:
3375:
3374:
3372:
3371:
3366:
3361:
3356:
3351:
3346:
3341:
3336:
3330:
3328:
3324:
3323:
3321:
3320:
3306:
3264:
3254:
3249:
3244:
3234:
3229:
3224:
3218:
3216:
3210:
3209:
3199:
3198:
3191:
3184:
3176:
3167:
3166:
3164:
3163:
3158:
3153:
3148:
3142:
3140:
3133:
3132:
3130:
3129:
3124:
3119:
3114:
3109:
3104:
3099:
3094:
3089:
3084:
3079:
3074:
3068:
3066:
3060:
3059:
3057:
3056:
3051:
3046:
3041:
3036:
3031:
3027:
3022:
3017:
3013:
3008:
3003:
2997:
2995:
2989:
2988:
2986:
2985:
2980:
2975:
2953:
2948:
2925:
2923:
2917:
2916:
2914:
2913:
2908:
2903:
2898:
2893:
2888:
2883:
2877:
2875:
2869:
2868:
2866:
2865:
2860:
2855:
2850:
2845:
2840:
2835:
2830:
2825:
2819:
2817:
2811:
2810:
2808:
2807:
2802:
2796:
2794:
2788:
2787:
2785:
2784:
2779:
2773:
2771:
2765:
2764:
2762:
2761:
2728:
2723:
2718:
2713:
2708:
2703:
2697:
2694:
2693:
2686:
2685:
2678:
2671:
2663:
2654:
2653:
2639:
2636:
2635:
2631:
2630:
2617:
2615:
2610:30 GHz/10 mm
2602:
2600:
2587:
2585:
2572:
2570:
2565:30 MHz/10 m
2557:
2555:
2542:
2540:
2527:
2525:
2520:30 kHz/10 km
2512:
2510:
2497:
2495:
2482:
2480:
2475:30 Hz/10 Mm
2467:
2465:
2452:
2447:
2444:
2443:
2439:Radio spectrum
2435:
2434:
2427:
2420:
2412:
2406:
2405:
2396:
2389:
2388:External links
2386:
2383:
2382:
2357:
2337:Globalstar.com
2321:
2290:
2264:
2239:
2214:
2181:
2150:
2124:
2095:
2069:
2059:
2033:
2012:
1988:
1970:
1945:
1918:"400 MHz Plan"
1909:
1902:
1882:
1854:
1853:
1851:
1848:
1847:
1846:
1841:
1836:
1825:
1822:
1821:
1820:
1817:
1814:
1807:
1795:(strictly for
1769:
1762:
1759:
1756:
1753:
1746:
1735:
1728:
1725:
1718:
1712:
1705:
1704:
1703:
1700:
1697:
1687:
1684:
1681:
1678:
1669:
1666:
1663:
1662:
1661:
1658:
1655:
1645:
1642:
1631:earth stations
1623:
1620:
1617:
1616:
1615:
1614:
1613:
1610:
1596:
1589:
1579:
1578:
1577:
1570:
1563:
1549:
1548:
1547:
1544:
1530:
1523:
1516:
1513:
1510:
1507:
1500:
1497:
1494:
1487:
1484:
1477:
1474:
1471:
1468:
1465:
1462:
1459:
1452:
1437:
1434:
1431:
1424:
1421:
1418:
1415:
1408:
1405:
1402:
1399:
1387:
1386:
1385:
1382:
1379:
1369:
1358:
1355:
1348:
1337:
1319:
1231:
1228:
1227:
1226:
1219:
1216:
1213:
1204:
1201:
1194:
1191:
1188:NarrowBand-IoT
1173:
1170:
1169:
1168:
1165:
1162:
1150:(until 2012).
1144:
1141:
1138:
1132:
1125:
1116:
1115:United Kingdom
1113:
1112:
1111:
1104:
1098:
1092:
1085:
1078:
1064:
1059:
1056:
1055:
1054:
1048:
1041:
1033:
1030:
1029:
1028:
1025:
1014:
1007:
1002:
999:
998:
997:
990:
983:
980:
977:
972:
969:
967:
964:
894:two-way radios
867:
864:
823:point-to-point
802:or the planar
776:two-way radios
772:walkie-talkies
739:two-way radios
721:
718:
647:Main article:
644:
641:
594:walkie-talkies
546:decimetre band
517:
516:
514:
513:
506:
499:
491:
488:
487:
485:
484:
479:
474:
469:
464:
459:
453:
450:
449:
445:
444:
442:
441:
436:
431:
426:
422:
418:
413:
409:
405:
400:
395:
390:
385:
380:
375:
369:
366:
365:
359:
358:
356:
355:
350:
345:
340:
335:
330:
325:
320:
315:
310:
305:
300:
295:
290:
284:
281:
280:
274:
273:
270:
269:
264:
259:
254:
248:
247:
242:
237:
232:
226:
225:
220:
215:
210:
200:
199:
193:
192:
182:
181:
179:
178:
168:
164:
162:
159:
156:
155:
150:
147:
144:
143:
138:
135:
132:
131:
127:
126:
124:
123:
112:
93:
91:
88:
85:
84:
72:
69:
66:
65:
53:
50:
47:
46:
33:
9:
6:
4:
3:
2:
5559:
5548:
5545:
5543:
5540:
5538:
5535:
5534:
5532:
5513:
5510:
5508:
5507:
5496:
5495:
5492:
5486:
5483:
5481:
5478:
5477:
5475:
5471:
5465:
5462:
5460:
5457:
5455:
5452:
5450:
5447:
5445:
5442:
5440:
5437:
5435:
5434:Digital radio
5432:
5430:
5427:
5425:
5422:
5420:
5417:
5416:
5414:
5410:
5404:
5401:
5399:
5396:
5394:
5391:
5389:
5386:
5384:
5381:
5380:
5378:
5375:
5370:
5364:
5361:
5359:
5356:
5355:
5353:
5349:
5342:
5338:
5332:
5329:
5327:
5324:
5322:
5319:
5317:
5314:
5312:
5309:
5307:
5304:
5303:
5301:
5298:
5294:
5288:
5285:
5283:
5280:
5278:
5275:
5273:
5270:
5268:
5265:
5263:
5260:
5259:
5257:
5255:
5251:
5239:
5236:
5235:
5234:
5231:
5230:
5228:
5225:
5221:
5215:
5212:
5210:
5207:
5205:
5202:
5200:
5197:
5195:
5192:
5191:
5189:
5185:
5179:
5176:
5174:
5171:
5169:
5162:
5160:
5157:
5156:
5154:
5150:
5147:
5143:
5133:
5130:
5127:
5125:
5122:
5120:
5117:
5115:
5112:
5110:
5107:
5105:
5102:
5101:
5099:
5095:
5088:
5084:
5081:
5078:
5074:
5070:
5066:
5063:
5060:
5056:
5053:
5050:
5046:
5043:
5040:
5036:
5033:
5032:
5030:
5028:
5024:
5018:
5015:
5013:
5010:
5008:
5005:
5004:
5002:
5000:
4997:
4993:
4990:
4986:
4982:
4979:
4978:digital audio
4975:
4968:
4963:
4961:
4956:
4954:
4949:
4948:
4945:
4933:
4925:
4923:
4915:
4913:
4905:
4903:
4893:
4892:
4889:
4882:
4878:
4876:
4873:
4871:
4868:
4866:
4863:
4861:
4858:
4854:
4851:
4849:
4846:
4845:
4843:
4841:
4838:
4837:
4835:
4831:
4825:
4822:
4820:
4817:
4815:
4812:
4810:
4807:
4805:
4802:
4800:
4797:
4795:
4792:
4790:
4787:
4785:
4782:
4780:
4777:
4776:
4774:
4772:
4768:
4762:
4759:
4757:
4754:
4752:
4749:
4747:
4744:
4742:
4739:
4737:
4734:
4732:
4729:
4727:
4724:
4722:
4719:
4717:
4714:
4712:
4709:
4707:
4704:
4702:
4699:
4698:
4696:
4694:
4690:
4684:
4681:
4679:
4676:
4674:
4671:
4669:
4666:
4664:
4661:
4660:
4658:
4654:
4648:
4647:Code-division
4645:
4643:
4640:
4638:
4635:
4633:
4632:Time-division
4630:
4628:
4625:
4623:
4620:
4619:
4617:
4615:
4611:
4605:
4602:
4598:
4595:
4593:
4590:
4589:
4588:
4585:
4581:
4578:
4577:
4576:
4573:
4571:
4568:
4566:
4563:
4562:
4560:
4558:and switching
4556:
4552:
4544:
4541:
4540:
4539:
4536:
4532:
4529:
4528:
4527:
4524:
4522:
4519:
4517:
4514:
4510:
4509:optical fiber
4507:
4506:
4505:
4502:
4500:
4499:Coaxial cable
4497:
4496:
4494:
4492:
4486:
4480:
4477:
4475:
4472:
4470:
4467:
4465:
4462:
4460:
4457:
4455:
4452:
4450:
4447:
4445:
4442:
4440:
4437:
4435:
4432:
4430:
4427:
4425:
4422:
4420:
4417:
4415:
4414:Radia Perlman
4412:
4410:
4407:
4405:
4402:
4400:
4397:
4395:
4392:
4390:
4387:
4385:
4382:
4380:
4377:
4375:
4372:
4370:
4367:
4365:
4362:
4360:
4357:
4355:
4352:
4350:
4347:
4345:
4342:
4340:
4337:
4335:
4332:
4330:
4327:
4325:
4322:
4320:
4317:
4315:
4312:
4310:
4307:
4305:
4304:Lee de Forest
4302:
4300:
4299:Thomas Edison
4297:
4295:
4292:
4290:
4289:Donald Davies
4287:
4285:
4282:
4280:
4277:
4275:
4274:Claude Chappe
4272:
4270:
4267:
4265:
4262:
4260:
4257:
4255:
4252:
4250:
4247:
4245:
4242:
4240:
4237:
4235:
4232:
4230:
4227:
4225:
4222:
4220:
4217:
4215:
4212:
4210:
4207:
4205:
4202:
4201:
4199:
4195:
4189:
4186:
4184:
4181:
4179:
4176:
4174:
4171:
4167:
4164:
4162:
4159:
4158:
4157:
4154:
4152:
4151:
4147:
4145:
4142:
4139:
4136:
4134:
4131:
4129:
4126:
4124:
4121:
4119:
4118:Smoke signals
4116:
4112:
4109:
4107:
4104:
4102:
4099:
4098:
4097:
4096:Semiconductor
4094:
4090:
4087:
4086:
4085:
4082:
4080:
4077:
4075:
4072:
4070:
4067:
4065:
4062:
4060:
4057:
4055:
4052:
4050:
4047:
4045:
4042:
4038:
4035:
4034:
4033:
4030:
4028:
4025:
4023:
4020:
4018:
4015:
4013:
4010:
4008:
4005:
4003:
4000:
3998:
3995:
3993:
3990:
3988:
3985:
3983:
3980:
3976:
3973:
3971:
3968:
3966:
3963:
3961:
3958:
3957:
3956:
3955:Digital media
3953:
3949:
3946:
3944:
3941:
3939:
3936:
3934:
3931:
3930:
3929:
3926:
3924:
3921:
3919:
3916:
3914:
3911:
3909:
3906:
3904:
3901:
3899:
3896:
3895:
3893:
3891:
3887:
3883:
3876:
3871:
3869:
3864:
3862:
3857:
3856:
3853:
3841:
3838:
3836:
3833:
3831:
3828:
3826:
3823:
3822:
3820:
3816:
3810:
3807:
3805:
3802:
3800:
3797:
3795:
3792:
3790:
3787:
3786:
3784:
3780:
3774:
3771:
3769:
3766:
3764:
3761:
3759:
3756:
3754:
3751:
3749:
3746:
3744:
3741:
3739:
3736:
3734:
3731:
3729:
3726:
3725:
3723:
3721:
3717:
3711:
3708:
3706:
3703:
3701:
3698:
3696:
3693:
3691:
3688:
3687:
3685:
3682:
3678:
3672:
3669:
3667:
3664:
3662:
3659:
3657:
3654:
3652:
3649:
3647:
3644:
3642:
3639:
3637:
3634:
3632:
3629:
3627:
3624:
3622:
3619:
3617:
3614:
3612:
3609:
3607:
3604:
3602:
3599:
3597:
3594:
3592:
3589:
3587:
3584:
3582:
3579:
3577:
3574:
3572:
3568:
3565:
3563:
3560:
3558:
3555:
3554:
3552:
3548:
3542:
3539:
3537:
3534:
3532:
3529:
3528:
3526:
3522:
3516:
3513:
3511:
3508:
3506:
3503:
3501:
3498:
3497:
3495:
3491:
3485:
3484:White clipper
3482:
3480:
3477:
3475:
3472:
3470:
3467:
3465:
3462:
3460:
3457:
3455:
3452:
3450:
3447:
3445:
3442:
3440:
3437:
3435:
3434:Frame (video)
3432:
3430:
3427:
3425:
3422:
3420:
3417:
3415:
3412:
3410:
3407:
3405:
3402:
3400:
3397:
3395:
3392:
3390:
3386:
3383:
3382:
3380:
3376:
3370:
3367:
3365:
3362:
3360:
3357:
3355:
3352:
3350:
3347:
3345:
3342:
3340:
3337:
3335:
3332:
3331:
3329:
3327:Color systems
3325:
3318:
3314:
3310:
3307:
3304:
3300:
3296:
3292:
3288:
3284:
3280:
3276:
3272:
3268:
3265:
3262:
3258:
3255:
3253:
3250:
3248:
3245:
3242:
3238:
3235:
3233:
3230:
3228:
3225:
3223:
3220:
3219:
3217:
3215:
3211:
3207:
3204:
3197:
3192:
3190:
3185:
3183:
3178:
3177:
3174:
3162:
3159:
3157:
3154:
3152:
3149:
3147:
3144:
3143:
3141:
3138:
3134:
3128:
3125:
3123:
3120:
3118:
3115:
3113:
3110:
3108:
3105:
3103:
3100:
3098:
3095:
3093:
3090:
3088:
3085:
3083:
3080:
3078:
3075:
3073:
3070:
3069:
3067:
3065:
3061:
3055:
3052:
3050:
3047:
3045:
3042:
3040:
3037:
3035:
3028:
3026:
3023:
3021:
3014:
3012:
3009:
3007:
3004:
3002:
2999:
2998:
2996:
2994:
2990:
2984:
2981:
2979:
2976:
2973:
2969:
2965:
2961:
2957:
2954:
2952:
2949:
2946:
2942:
2938:
2934:
2930:
2927:
2926:
2924:
2922:
2918:
2912:
2909:
2907:
2904:
2902:
2899:
2897:
2894:
2892:
2889:
2887:
2884:
2882:
2879:
2878:
2876:
2874:
2870:
2864:
2861:
2859:
2856:
2854:
2851:
2849:
2846:
2844:
2841:
2839:
2836:
2834:
2831:
2829:
2826:
2824:
2821:
2820:
2818:
2816:
2812:
2806:
2803:
2801:
2798:
2797:
2795:
2793:
2789:
2783:
2780:
2778:
2775:
2774:
2772:
2770:
2766:
2759:
2755:
2748:
2736:
2732:
2729:
2727:
2724:
2722:
2719:
2717:
2714:
2712:
2709:
2707:
2704:
2702:
2699:
2698:
2695:
2691:
2684:
2679:
2677:
2672:
2670:
2665:
2664:
2661:
2651:
2650:
2637:
2628:
2627:3 THz/0.1 mm
2623:
2622:
2616:
2613:
2612:300 GHz/1 mm
2608:
2607:
2601:
2598:
2597:30 GHz/10 mm
2595:3 GHz/100 mm
2593:
2592:
2586:
2583:
2582:3 GHz/100 mm
2578:
2577:
2571:
2568:
2563:
2562:
2556:
2553:
2550:3 MHz/100 m
2548:
2547:
2541:
2538:
2533:
2532:
2526:
2523:
2522:300 kHz/1 km
2518:
2517:
2511:
2508:
2507:30 kHz/10 km
2505:3 kHz/100 km
2503:
2502:
2496:
2493:
2492:3 kHz/100 km
2488:
2487:
2481:
2478:
2473:
2472:
2466:
2463:
2460:3 Hz/100 Mm
2458:
2457:
2451:
2450:
2445:
2440:
2433:
2428:
2426:
2421:
2419:
2414:
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2410:
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2325:
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2303:
2297:
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2268:
2253:
2249:
2243:
2228:
2227:Navipedia.net
2224:
2218:
2203:
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2190:
2188:
2186:
2170:
2163:
2157:
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2138:
2134:
2128:
2112:
2105:
2099:
2083:
2079:
2073:
2067:
2063:
2048:
2044:
2037:
2022:
2016:
1998:
1992:
1984:
1980:
1974:
1959:
1955:
1949:
1930:
1926:
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1370:
1367:
1363:
1359:
1356:
1353:
1349:
1346:
1342:
1338:
1336:
1332:
1328:
1327:amateur radio
1324:
1320:
1317:
1313:
1312:
1311:
1309:
1306:'s scheduled
1305:
1301:
1297:
1293:
1288:
1286:
1281:
1279:
1275:
1271:
1267:
1262:
1260:
1255:
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1249:
1245:
1241:
1237:
1230:United States
1224:
1220:
1217:
1214:
1212:
1209:
1205:
1202:
1199:
1195:
1192:
1189:
1185:
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1160:
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1137:
1133:
1130:
1126:
1123:
1119:
1118:
1109:
1105:
1103:
1099:
1097:
1093:
1090:
1086:
1083:
1079:
1077:
1073:
1069:
1068:Amateur radio
1065:
1062:
1061:
1053:
1049:
1046:
1042:
1040:
1036:
1035:
1026:
1023:
1019:
1015:
1012:
1008:
1005:
1004:
995:
991:
988:
984:
981:
978:
975:
974:
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961:
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953:
949:
946:
942:
938:
934:
930:
926:
922:
918:
913:
911:
907:
903:
899:
895:
890:
888:
884:
883:trunked radio
880:
876:
872:
863:
860:
856:
852:
848:
844:
843:slot antennas
840:
836:
832:
828:
824:
820:
815:
813:
809:
805:
801:
797:
793:
789:
785:
781:
777:
773:
769:
764:
760:
756:
747:
740:
737:
732:
727:
717:
715:
710:
708:
704:
698:
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688:
684:
680:
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672:
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664:
660:
656:
650:
637:
633:
628:
624:
622:
618:
614:
610:
605:
603:
599:
595:
591:
587:
583:
579:
575:
571:
567:
566:line of sight
563:
559:
555:
551:
547:
543:
539:
535:
531:
527:
523:
512:
507:
505:
500:
498:
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205:
202:
201:
198:
195:
194:
191:
188:
187:
176:
172:
169:
166:
165:
163:
160:Related bands
157:
151:
145:
139:
133:
128:
121:
117:
113:
110:
106:
102:
98:
95:
94:
92:
89:Related bands
86:
82:
78:
73:
67:
63:
59:
54:
48:
43:
30:
19:
5497:
5086:
4981:broadcasting
4614:Multiplexing
4489:Transmission
4454:Nikola Tesla
4444:Henry Sutton
4399:Samuel Morse
4329:Robert Hooke
4294:Amos Dolbear
4229:John Bardeen
4148:
4128:Telautograph
4032:Mobile phone
3987:Edholm's law
3970:social media
3903:Broadcasting
3835:Hanover bars
3704:
3626:Pre-emphasis
3550:Transmission
3515:Zweikanalton
3419:Color killer
3344:Clear-Vision
3086:
2741:
2640:
2619:
2618:
2604:
2603:
2589:
2588:
2575:
2574:
2573:
2567:300 MHz/1 m
2559:
2558:
2552:30 MHz/10 m
2544:
2543:
2537:3 MHz/100 m
2529:
2528:
2514:
2513:
2499:
2498:
2484:
2483:
2477:300 Hz/1 Mm
2469:
2468:
2462:30 Hz/10 Mm
2454:
2453:
2399:
2374:. Retrieved
2369:
2360:
2348:. Retrieved
2336:
2324:
2312:. Retrieved
2308:
2281:. Retrieved
2277:Ntia.doc.gov
2276:
2267:
2256:. Retrieved
2254:. 2016-06-04
2251:
2242:
2230:. Retrieved
2226:
2217:
2205:. Retrieved
2201:
2173:. Retrieved
2171:. 2017-10-10
2168:
2141:. Retrieved
2136:
2127:
2115:. Retrieved
2110:
2098:
2086:. Retrieved
2072:
2062:
2050:. Retrieved
2046:
2036:
2025:. Retrieved
2015:
2003:. Retrieved
1991:
1982:
1973:
1961:. Retrieved
1957:
1948:
1936:. Retrieved
1929:the original
1924:
1912:
1892:
1885:
1873:. Retrieved
1867:
1858:
1289:
1282:
1263:
1256:
1233:
994:UHF channels
921:wireless LAN
914:
891:
869:
866:Applications
831:log periodic
816:
752:
711:
699:
697:TV signals.
652:
606:
545:
525:
521:
520:
382:
251:
173: /
118: /
107: /
103: /
99: /
5429:Cable radio
5372:Technical (
5132:DVB-T2 Lite
4988:Terrestrial
4814:NPL network
4526:Radio waves
4464:Alfred Vail
4374:Hedy Lamarr
4359:Dawon Kahng
4319:Elisha Gray
4279:Yogen Dalal
4204:Nasir Ahmed
4138:Teleprinter
4002:Heliographs
3804:VIT signals
3799:Vectorscope
3738:Earth bulge
3720:Propagation
3683:& bands
3681:Frequencies
3464:Raster scan
3404:Chrominance
3394:Black level
3389:front porch
3156:Medium wave
2833:Lyman-alpha
2815:Ultraviolet
2754:wavelengths
2747:frequencies
2711:Ultraviolet
2350:17 December
2314:17 December
2283:17 December
2232:17 December
2207:17 December
2143:17 December
2117:17 December
2088:October 21,
1938:November 3,
1875:17 December
1777:IEEE 802.11
1752:deployment)
1734:deployment)
1584:1610–1618:
1451:, datalinks
1352:land mobile
1316:meteorology
1058:New Zealand
939:. Current
925:IEEE 802.11
788:cell phones
679:diffraction
675:wavelengths
671:ground wave
574:cell phones
190:Radio bands
153:1 m to 3 dm
5531:Categories
5311:DirectBand
5297:Subcarrier
4999:modulation
4860:Antarctica
4819:Toasternet
4741:Television
4224:Paul Baran
4156:Television
4140:(teletype)
4133:Telegraphy
4111:transistor
4089:Phryctoria
4059:Photophone
4037:Smartphone
4027:Mass media
3733:Distortion
3666:Transposer
3601:Dummy load
3557:Amplifiers
3524:Modulation
3414:Colorburst
3385:Back porch
3137:Wavelength
2993:Microwaves
2805:Hard X-ray
2800:Soft X-ray
2769:Gamma rays
2701:Gamma rays
2376:2018-06-05
2258:2018-04-02
2175:2017-10-11
2052:15 October
2027:2014-11-21
1963:15 October
1903:0471743682
1850:References
1811:Globalstar
1750:smart grid
1732:smart grid
1586:Globalstar
1536:downlink (
1395:digital TV
1362:Channel 37
1298:for their
929:cellphones
770:, such as
724:See also:
691:attenuates
663:ionosphere
613:radar band
584:including
5374:AM stereo
5233:Sirius XM
5226:providers
5145:Satellite
4844:Americas
4833:Locations
4804:Internet2
4565:Bandwidth
4269:Vint Cerf
4166:streaming
4144:Telephone
4084:Semaphore
3975:streaming
3840:Sparklies
3825:Dot crawl
3818:Artifacts
3758:Path loss
3753:Null fill
3728:Beam tilt
3469:Safe area
3151:Shortwave
3146:Microwave
2726:Microwave
2111:Npstc.org
1789:Bluetooth
1743:Sirius XM
1520:TerreStar
1504:TerreStar
1364:used for
1278:Bluetooth
1270:ISM bands
971:Australia
794:, sleeve
707:repeaters
705:). Radio
590:Bluetooth
558:microwave
556:(SHF) or
550:decimeter
542:gigahertz
538:megahertz
528:) is the
167:UHF (ITU)
5547:Wireless
5473:Cultural
5403:Magnavox
5376:formats)
5326:SCA/SCMO
5321:RDS/RBDS
5124:HD Radio
5114:DRM/DRM+
5109:DAB/DAB+
4912:Category
4799:Internet
4789:CYCLADES
4706:Ethernet
4656:Concepts
4580:terminal
4531:wireless
4354:Bob Kahn
4197:Pioneers
4022:Internet
3913:Cable TV
3830:Ghosting
3591:Diplexer
3459:Overscan
3424:Color TV
3317:System F
3313:System E
3309:819-line
3303:System N
3299:System L
3295:System K
3291:System I
3287:System H
3283:System G
3279:System D
3275:System C
3271:System B
3267:625-line
3261:System M
3257:525-line
3252:455-line
3247:441-line
3241:System A
3237:405-line
3232:375-line
3227:343-line
3222:180-line
3161:Longwave
2921:Infrared
2721:Infrared
2341:Archived
2339:. 2017.
1983:Freeview
1925:acma.gov
1832:and its
1824:See also
1602:uplink (
1600:Skyterra
1534:Skyterra
1483:, other.
1441:ISM band
1335:MedRadio
1300:MediaFLO
1296:Qualcomm
1268:. These
1238:on both
1155:Freeview
937:Internet
935:and the
734:Retevis
720:Antennas
267:12 (THF)
262:11 (EHF)
257:10 (SHF)
114:UHF and
5299:signals
5267:AMR-WB+
5119:FMeXtra
4932:Commons
4922:Outline
4875:Oceania
4794:FidoNet
4779:ARPANET
4592:circuit
4161:digital
3890:History
3782:Testing
3364:PALplus
3214:Systems
2752:longer
2745:higher
2716:Visible
2370:The FCC
2169:the FCC
2005:4 April
1593:Iridium
1574:Galileo
1569:G1 band
1567:GLONASS
1562:L1 band
851:helical
796:dipoles
755:antenna
685:due to
667:skywave
252:9 (UHF)
245:8 (VHF)
223:4 (VLF)
218:3 (ULF)
213:2 (SLF)
208:1 (ELF)
175:C bands
120:S bands
109:E bands
5393:Harris
5388:C-QUAM
5277:HE-AAC
5254:Codecs
5238:Canada
5204:DVB-SH
5178:S band
5173:L band
5159:C band
5083:L band
4974:Analog
4870:Europe
4840:Africa
4824:Usenet
4784:BITNET
4721:Mobile
4597:packet
4106:MOSFET
4101:device
3898:Beacon
3339:NTSC-J
3054:L band
3049:S band
3044:C band
3039:X band
3025:K band
3011:Q band
3006:V band
3001:W band
2906:Orange
2901:Yellow
2881:Violet
2792:X-rays
2706:X-rays
1900:
1805:Zigbee
1799:use),
1604:Ligado
1588:uplink
1538:Ligado
1343:, and
1136:PMR446
1074:) and
1032:France
1022:L band
1001:Canada
960:S band
956:L band
910:UHF CB
908:, and
906:PMR446
889:use.
683:fading
621:S band
617:L band
240:7 (HF)
235:6 (MF)
230:5 (LF)
177:(NATO)
122:(IEEE)
111:(NATO)
5383:Belar
5209:S-DMB
5199:DAB-S
5104:CAM-D
5017:COFDM
4996:Radio
4853:South
4848:North
4809:JANET
4746:Telex
4736:Radio
4575:Nodes
4570:Links
4491:media
4069:Radio
4054:Pager
3982:Drums
3948:video
3943:image
3933:audio
3505:NICAM
3493:Sound
3378:Video
3369:SECAM
3359:PAL-S
3354:PAL-M
3139:types
3064:Radio
2960:Bands
2933:Bands
2896:Green
2731:Radio
2441:(ITU)
2344:(PDF)
2333:(PDF)
2305:(PDF)
2198:(PDF)
2165:(PDF)
2107:(PDF)
2000:(PDF)
1932:(PDF)
1921:(PDF)
1481:SCADA
1456:SCADA
1181:LPWAN
917:Wi-fi
837:, or
792:whips
586:Wi-Fi
363:IEEE
79:to 1
60:to 3
5331:DARC
5306:AMSS
5287:DRA+
5168:band
5077:high
4976:and
4865:Asia
4751:UUCP
4711:ISDN
3768:Skew
3449:Luma
3387:and
3334:NTSC
3034:band
3020:band
2978:LWIR
2956:MWIR
2951:SWIR
2891:Cyan
2886:Blue
2352:2017
2316:2017
2285:2017
2234:2017
2209:2017
2145:2017
2119:2017
2090:2019
2082:NTIA
2054:2017
2007:2020
1965:2017
1940:2019
1898:ISBN
1877:2017
1869:IEEE
1709:NASA
1673:DECT
1428:Gogo
1412:Gogo
1398:36).
1325:and
1242:and
1208:DECT
1159:PMSE
958:and
943:and
912:.
902:GMRS
900:are
885:and
853:and
845:and
827:Yagi
786:and
736:GMRS
630:UHF
609:IEEE
607:The
588:and
197:ITU
56:300
5316:PAD
5272:HDC
5262:AAC
5214:SDR
5194:ADR
5128:CDR
5087:UHF
5073:mid
5069:low
5065:VHF
4756:WAN
4726:NGN
4716:LAN
3997:Fax
3938:DCT
3710:VHF
3705:UHF
3349:PAL
3127:ELF
3122:SLF
3117:ULF
3112:VLF
3092:VHF
3087:UHF
3082:SHF
3077:EHF
3072:THF
2983:FIR
2929:NIR
2911:Red
2863:UVA
2858:UVB
2853:UVC
2848:NUV
2843:MUV
2838:FUV
2621:THF
2606:EHF
2591:SHF
2576:UHF
2561:VHF
2501:VLF
2486:ULF
2471:SLF
2456:ELF
2252:FCC
1781:LAN
1773:ISM
1691:AWS
1649:AWS
1560:GPS
1333:),
1304:FCC
1252:VHF
1184:IoT
1089:P25
1082:PRS
695:VHF
578:GPS
530:ITU
526:UHF
467:III
383:UHF
378:VHF
62:GHz
58:MHz
5533::
5075:/
5071:/
5059:HF
5055:SW
5049:MF
5045:MW
5039:LF
5035:LW
5012:FM
5007:AM
3315:,
3301:,
3297:,
3293:,
3289:,
3285:,
3281:,
3277:,
3273:,
3107:LF
3102:MF
3097:HF
2970:,
2966:,
2962::
2943:,
2939:,
2935::
2546:HF
2531:MF
2516:LF
2368:.
2335:.
2307:.
2293:^
2275:.
2250:.
2225:.
2200:.
2184:^
2167:.
2153:^
2135:.
2109:.
2080:.
2045:.
1981:.
1956:.
1923:.
1866:.
1803:,
1791:,
1787:,
1783:,
1775:,
1287:.
1261:.
1179:,
962:.
945:4G
941:3G
904:,
881:,
833:,
829:,
814:.
798:,
782:;
774:,
659:HF
600:,
596:,
592:,
580:,
572:,
482:VI
472:IV
462:II
439:mm
373:HF
81:dm
75:1
5166:u
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