Allocations

 
U.S. Non-Federal-Government Allocations
226 - 231.5 GHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


U.S. Federal Government Allocations
226 - 231.5 GHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


ITU Region 1 Allocations
226 - 231.5 GHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


ITU Region 2 Allocations
226 - 231.5 GHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


ITU Region 3 Allocations
226 - 231.5 GHz
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH (passive)


SpectrumWiki

Band Uses (226 - 231.5 GHz)

Footnotes

5.340   All emissions are prohibited in the following bands:
1 400-1 427 MHz,
2 690-2 700 MHz, except those provided for by No. 5.422,
10.68-10.7 GHz, except those provided for by No. 5.483,
15.35-15.4 GHz, except those provided for by No. 5.511,
23.6-24 GHz,
31.3-31.5 GHz,
31.5-31.8 GHz, in Region 2,
48.94-49.04 GHz, from airborne stations
50.2-50.4 GHz*,
52.6-54.25 GHz,
86-92 GHz,
100-102 GHz,
109.5-111.8 GHz,
114.25-116 GHz,
148.5-151.5 GHz,
164-167 GHz,
182-185 GHz,
190-191.8 GHz,
200-209 GHz,
226-231.5 GHz,
250-252 GHz. (WRC 03)

US246   No station shall be authorized to transmit in the following bands: 73-74.6 MHz, 608-614 MHz, except for medical telemetry equipment1 and white space devices,2 1400-1427 MHz, 1660.5-1668.4 MHz, 2690-2700 MHz, 4990-5000 MHz, 10.68-10.7 GHz, 15.35-15.4 GHz, 23.6-24 GHz, 31.3-31.8 GHz, 50.2-50.4 GHz, 52.6-54.25 GHz, 86-92 GHz, 100-102 GHz, 109.5-111.8 GHz, 114.25-116 GHz, 148.5-151.5 GHz, 164-167 GHz, 182-185 GHz, 190-191.8 GHz, 200-209 GHz, 226-231.5 GHz, 250-252 GHz.

1Medical telemetry equipment shall not cause harmful interference to radio astronomy operations in the band 608-614 MHz and shall be coordinated under the requirements found in 47 CFR 95.1119.

2White space devices shall not cause harmful interference to radio astronomy operations in the band 608-614 MHz and shall not operate within the areas described in 47 CFR 15.712(h).


SpectrumWiki

 
WRC-23 Agenda Item 1.14 Possible Adjustments to EESS (passive) Allocations
DARPA Video Synthetic Aperture Radar (ViSAR)
WRC-27 study for radiolocation use


Related Documents, Links, and Multimedia:
FCC Proceeding (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 226 GHz 228.75 GHz 231.5 GHz
Wavelength 1.3 mm 1.3 mm 1.3 mm
Band designator(s) EHF (millimeter wave) EHF (millimeter wave) EHF (millimeter wave)
Isotropic collecting area 0.1 mm2 0.1 mm2 0.1 mm2
Free space loss (1 m) 79.5 dB 79.6 dB 79.7 dB
Free space loss (1 km) 139.5 dB 139.6 dB 139.7 dB
Free space loss (10 km) 159.5 dB 159.6 dB 159.7 dB
Free space loss (100 km) 179.5 dB 179.6 dB 179.7 dB
Free space loss (1000 km) 199.5 dB 199.6 dB 199.7 dB
Free space loss
(35,786 km = GEO orbit)
230.6 dB 230.7 dB 230.8 dB
Free space loss (378,370 km = Moon) 251.1 dB 251.2 dB 251.3 dB
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