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Extremely High Frequency


Gap in list
31.0 - 31.3 GHz
  • Local Multipoint Distribution Service (LMDS) [101.1005]
  • Point-to-Point Microwave Service, grandfathered only, after June 30, 1997 [101.803]
  • Local Television Transmission Service, grandfathered only, after June 30, 1997 [101.803]
  • Private Operational Fixed Service, grandfathered only, after June 30, 1997 [101.147]
  • Radio astronomy 31.2 - 31.3 GHz [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    31.8 - 33.4 GHz
  • Radionavigation [Part 87]
  • 33.4 - 34.2 GHz
  • Government radiolocation
  • Radiolocation [Part 90 Subpart F]
  • 34.2 - 34.7 GHz
  • Earth-to-space transmissions in the space research service, limited to deep space communications at Goldstone, California. [2.106 FOOTNOTE US252]
  • Government radiolocation
  • Radiolocation [Part 90 Subpart F]
  • 34.7 - 36.0 GHz
  • Government radiolocation
  • Radiolocation [Part 90 Subpart F]
  • 36.0 - 37.0 GHz
  • Current and Proposed Government Earth Exploration - Satellite/Space Research, Fixed, and Mobile (NPRM, FCC 97-85, Released: March 24, 1997)
  • NASA intends to use part of band for planetary exploration downlinks (space-to-earth) and part for downlinking data from spaceborne very long baseline interferometry (NPRM, FCC 97-85, Released: March 24, 1997 at para. 32).
  • Radio astronomy spectral line observations, 36.43 - 36.5 GHz [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]
  • 37.0 - 37.5 GHz
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • Proposed addition of Government co - primary Space Research (NPRM, FCC 97-85, Released: March 24, 1997)
  • 37.5 - 38.0 GHz
  • Proposed FSS (NGSO) and possible Wireless Underlay (NPRM, FCC 97-85, Released: March 24, 1997)
  • Proposed addition of Government co - primary Space Research (NPRM, FCC 97-85, Released: March 24, 1997)
  • 38.0 - 38.5 GHz
  • Proposed FSS (NGSO) and possible Wireless Underlay (NPRM, FCC 97-85, Released: March 24, 1997)
  • 38.5 - 38.6 GHz
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • 38.6 - 40.0 GHz
  • Point-to-Point Microwave Service, Private Operational Fixed Service, TV Broadcast Auxiliary Service (Fixed/Mobile/Temporary Fixed) - Grandfathered only [101.147(v)]
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • 40.0 - 40.5 GHz
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • Proposed Government co - primary Space Research and Earth Exploration - Satellite (Earth-to-space) (NPRM, FCC 97-85, Released: March 24, 1997)
  • Proposed Government secondary Earth Exploration - Satellite (space-to-Earth) (NPRM, FCC 97-85, Released: March 24, 1997 at para. 30)
  • 40.5 - 41.5 GHz
  • Proposed FSS (GSO) and possible Wireless Underlay (NPRM, FCC 97-85, Released: March 24, 1997)
  • 41.5 - 42.5 GHz
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • 42.5 - 43.5 GHz
  • Current Government Radioastronomy (NPRM, FCC 97-85, Released: March 24, 1997)
  • Radio astronomy spectral line observations [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]
  • 43.5 - 45.5 GHz
  • Government FSS (Military) [FCC 97-85, Released: March 24, 1997)
  • 45.5 - 46.7 GHz
  • Future Government Mobile, MSS, and Radionavigation - Satellite (NPRM, FCC 97-85, Released: March 24, 1997)
  • 46.7 - 46.9 GHz
  • Vehicle Radar Systems [15.253]
  • Government Radionavigation - Satellite (NPRM, FCC 97-85, Released: March 24, 1997)
  • 46.9 - 47.0 GHz
  • Radio frequency devices [Part 15]
  • Government mobile, mobile-satellite (Earth-to-space), radionavigation and radionavigation-satellite
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)
  • 47.0 - 47.2 GHz
  • Amateur (6 mm band) [97.301]
  • 47.2 - 48.2 GHz
  • Designated for licensed, commercial use on the basis of area-wide licenses [FCC 97-153, Released July 21, 1997]
  • Proposed Sky Stations, lighter than air craft in stratosphere to provide internet access and other communications. (47.2 - 47.5 GHz downlink, 47.9 - 48. 2 GHz uplink.)
  • 48.2 - 49.2 GHz
  • Proposed FSS (NGSO) and possible Wireless Underlay (NPRM, FCC 97-85, Released: March 24, 1997)
  • Radio astronomy spectral line observations, 48.94 - 49.04 GHz [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]
  • 49.2 - 50.2 GHz
  • Proposed FSS (GSO) and possible Wireless Underlay (NPRM, FCC 97-85, Released: March 24, 1997)
  • 50.2 - 50.4 GHz
  • Government Passive Earth - Exploration Service (NPRM, FCC 97-85, Released: March 24, 1997)
  • 50.4 - 51.4 GHz
  • Proposed Wireless Services (NPRM, FCC 97-85, Released: March 24, 1997)

  • Gap in list
    57 - 59 GHz
  • General unlicensed devices [15.255]
  • 59 - 64 GHz
  • General unlicensed devices [15.255]
  • Industrial, Scientific and Medical (61 - 61.5 GHz only) [Part 18]

  • Gap in list
    71 - 75.5 GHz
  • Point-to-point microwave [Part 101 Subpart Q]. Allocated by Report and Order, FCC 03-248, Adopted October 16, 2003, Released November 4, 2003
  • 75.5 - 76 GHz
  • Amateur (4 mm band) [97.301] until January 1, 2006. Reallocated to point-to-point microwave [FCC 03-248, Adopted October 16, 2003, Released November 4, 2003]
  • 76 - 77 GHz
  • Government/non-Government radiolocation systems
  • Amateur (4 mm band) use suspended (December 15, 1995)
  • Vehicle Radar Systems [15.253]
  • 77 - 81 GHz
  • Amateur (4 mm band) [97.301]
  • Government/non-Government radiolocation systems
  • 81 - 86 GHz
  • Point-to-point microwave [Part 101 Subpart Q]. Allocated by Report and Order, FCC 03-248, Adopted October 16, 2003, Released November 4, 2003

  • Gap in list
    92 - 94 GHz
  • Point-to-point microwave [Part 101 Subpart Q]. Allocated by Report and Order, FCC 03-248, Adopted October 16, 2003, Released November 4, 2003
  • Unlicensed, limited to indoor use [15.257]
  • 94 - 94.1 GHz
  • Federal Government
  • Unlicensed, limited to indoor use [15.257]
  • 94.1 - 95 GHz
  • Point-to-point microwave [Part 101 Subpart Q]. Allocated by Report and Order, FCC 03-248, Adopted October 16, 2003, Released November 4, 2003
  • Unlicensed, limited to indoor use [15.257]

  • Gap in list
    97.88 - 98.08 GHz
  • Radio astronomy spectral line observations [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    119.98 - 120 GHz
  • Amateur (2.5 mm band) [Part 97]

  • Gap in list
    122 - 123 GHz
  • Industrial, Scientific and Medical [Part 18]

  • Gap in list
    140.69-140.98 GHz
  • Radio astronomy spectral line observations [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    142 - 149 GHz
  • Amateur (2 mm band) [Part 97]
  • Radio astronomy spectral line observations, 144.68 - 144.98 GHz, 145.45 - 145.75 GHz and 146.82 - 147.12 GHz [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    241 - 250 GHz
  • Amateur (1 mm band)
  • Industrial, Scientific and Medical [Part 18] (244 - 246 MHz only)

  • Gap in list
    262.24 - 262.76 GHz
  • Radio astronomy spectral line observations [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    265- 275 GHz
  • Radio astronomy [2.106 proposed footnote US342 (NPRM, FCC 97-85, Released: March 24, 1997)]

  • Gap in list
    above 300 GHz
  • Amateur

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    This page written by John Neuhaus, WA2JXE <john at jneuhaus.com>. Please send me your comments and suggestions.
    Last modified: 20 Jul 2015