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Radio Frequency Bands Supporting Aviation

On the CPA forum there was a discussion of how crowded the air-to-air frequency, 122.75, is in certain areas. Several people suggested using 123.45 or 122.85. Neither of these are approved for air-to-air communication. I found an FAA showing frequency bands for aviation (shown below) but it doesn’t go into detail about the band we’re most interested in 118.000 to 136.975. This site, Civil Air Frequencies has a list showing how the spectrum is allocated.

Radio Frequency Bands Supporting Aviation

Source FAA

Frequency Band Name
190 – 435 & 510 – 535 kHz Non-directional Beacons
2100 – 28,000 kHz HF Communications
75 MHz NAVAID (Marker Beacons)
108 – 112 MHz VOR; ILS Localizer
112 – 118 MHz VOR; SCAT-I Radionavigation data link
118 – 137 MHz VHF Air / Ground Communications
138 – 150.8 & 162 – 174 MHz Fixed, Mobil
225 – 328.6 & 335.4 – 400 MHz UHF Air / Ground Communications (U.S. Military)
328.6 – 335.4 MHz ILS Glide Slope
406.1 – 420 MHz Fixed, Mobil
932 – 935 & 941 – 944 MHz RMM, LLWAS, LDRCL, etc.
960 – 1215 MHz NAVAID (TACAN / DME, etc.)
1030 & 1090 MHz Air Traffic Control Radar Beacon; Mode S; TCAS
1215 – 1390 MHz Air Route Surveillance Radar; GPS and GLONASS L1
1545 – 1559 MHz Satellite-Based Comm (To Aircraft)
1559 – 1610 MHz Satellite Navigation; GPS and GLONASS L1
1646.5 – 1660.5 MHz Satellite-Based Comm (From Aircraft)
1710 – 1850 MHz LDRCL; fixed links
2700 – 3000 MHz Airport Surveillance and Weather Radar
5000 – 5250 MHz Microwave Landing System
5600 – 5650 MHz TDWR
7125 – 8500 MHz RCL
9000 – 9200 MHz Military Precision Approach Radar
14.4 – 15.35 GHz Microwave Link
15.7 – 16.2 GHz Radar (ASDE-3)
21.2 – 23.6 GHz Microwave Link

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