Allocations

 
U.S. Non-Federal-Government Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


U.S. Federal Government Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION


ITU Region 1 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


ITU Region 2 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


ITU Region 3 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


SpectrumWiki


Footnotes


5.138 The following bands:

6765-6795 kHz (centre frequency 6780 kHz),

433.05-434.79 MHz (centre frequency 433.92 MHz) in Region 1 except in the countries mentioned in

No. 5.280,

61-61.5 GHz (centre frequency 61.25 GHz),

122-123 GHz (centre frequency 122.5 GHz), and

244-246 GHz (centre frequency 245 GHz)

are designated for industrial, scientific and medical (ISM) applications. The use of these frequency bands for ISM applications shall be subject to special authorization by the administration concerned, in agreement with other administrations whose radiocommunication services might be affected. In applying this provision, administrations shall have due regard to the latest relevant ITU-R Recommendations.

5.149 In making assignments to stations of other services to which the bands:

13360-13410 kHz,22.81-22.86 GHz,
25550-25670 kHz,23.07-23.12 GHz,
37.5-38.25 MHz,31.2-31.3 GHz,
73-74.6 MHz31.5-31.8 GHz
  in Regions 1 and 3,  in Regions 1 and 3,
150.05-153 MHz36.43-36.5 GHz,
  in Region 1,42.5-43.5 GHz,
322-328.6 MHz,48.94-49.04 GHz,
406.1-410 MHz,76-86 GHz,
608-614 MHz in92-94 GHz,
  Regions 1 and 3,94.1-100 GHz,
1330-1400 MHz,102-109.5 GHz,
1610.6-1613.8 MHz,111.8-114.25 GHz,
1660-1670 MHz,128.33-128.59 GHz,
1718.8-1722.2 MHz,129.23-129.49 GHz,
2655-2690 MHz,130-134 GHz,
3260-3267 MHz,136-148.5 GHz,
3332-3339 MHz,151.5-158.5 GHz,
3345.8-3352.5 MHz,168.59-168.93 GHz,
4825-4835 MHz,171.11-171.45 GHz,
4950-4990 MHz,172.31-172.65 GHz,
4990-5000 MHz,173.52-173.85 GHz,
6650-6675.2 MHz,195.75-196.15 GHz,
10.6-10.68 GHz,209-226 GHz,
14.47-14.5 GHz,241-250 GHz,
22.01-22.21 GHz,252-275 GHz
22.21-22.5 GHz,

are allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 4.5 and 4.6 and Article 29). (WRC-07)

US342 In making assignments to stations of other services to which the bands:

13360-13410 kHz

42.77-42.87 GHz*

25550-25670 kHz

43.07-43.17 GHz*

37.5-38.25 MHz

43.37-43.47 GHz*

322-328.6 MHz*

48.94-49.04 GHz*

1330-1400 MHz*

76-86 GHz

1610.6-1613.8 MHz*

92-94 GHz

1660-1660.5 MHz*

94.1-100 GHz

1668.4-1670 MHz*

102-109.5 GHz

3260-3267 MHz*

111.8-114.25 GHz

3332-3339 MHz*

128.33-128.59 GHz*

3345.8-3352.5 MHz*

129.23-129.49 GHz*

4825-4835 MHz*

130-134 GHz

4950-4990 MHz

136-148.5 GHz

6650-6675.2 MHz*

151.5-158.5 GHz

14.47-14.5 GHz*

168.59-168.93 GHz*

22.01-22.21 GHz*

171.11-171.45 GHz*

22.21-22.5 GHz

172.31-172.65 GHz*

22.81-22.86 GHz*

173.52-173.85 GHz*

23.07-23.12 GHz*

195.75-196.15 GHz*

31.2-31.3 GHz

209-226 GHz

36.43-36.5 GHz*

241-250 GHz

42.5-43.5 GHz

252-275 GHz

are allocated (*indicates radio astronomy use for spectral line observations), all practicable steps shall be taken to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see ITU Radio Regulations at Nos. 4.5 and 4.6 and Article 29).


SpectrumWiki

 
Industrial, Scientific, and Medical Devices (ISM, FCC Part 18)


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 241 GHz 244.5 GHz 248 GHz
Wavelength 1.2 mm 1.2 mm 1.2 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) 80.1 dB 80.2 dB 80.3 dB
Free space loss (1 km) 140.1 dB 140.2 dB 140.3 dB
Free space loss (10 km) 160.1 dB 160.2 dB 160.3 dB
Free space loss (100 km) 180.1 dB 180.2 dB 180.3 dB
Free space loss (1000 km) 200.1 dB 200.2 dB 200.3 dB
Free space loss
(35,786 km = GEO orbit)
231.2 dB 231.3 dB 231.4 dB
Free space loss (378,370 km = Moon) 251.6 dB 251.8 dB 251.9 dB