Allocations

 
U.S. Non-Federal-Government Allocations
4940 - 4990 MHz
FIXED
MOBILE except aeronautical mobile

Relevant FCC Auctions:
Auction 19 (General Wireless Communications Service), $0
 Total net auction bids: $0

U.S. Federal Government Allocations
4940 - 4990 MHz


ITU Region 1 Allocations
4800 - 4990 MHz
FIXED
MOBILE 5.440A 5.442
Radio astronomy


ITU Region 2 Allocations
4800 - 4990 MHz
FIXED
MOBILE 5.440A 5.442
Radio astronomy


ITU Region 3 Allocations
4800 - 4990 MHz
FIXED
MOBILE 5.440A 5.442
Radio astronomy


SpectrumWiki


Footnotes


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)

5.339 The bands 1370-1400 MHz, 2640-2655 MHz, 4950-4990 MHz and 15.20-15.35 GHz are also allocated to the space research (passive) and Earth exploration-satellite (passive) services on a secondary basis.

5.440A In Region 2 (except Brazil, Cuba, French overseas departments and communities, Guatemala, Paraguay, Uruguay and Venezuela), and in Australia, the band 4400-4940 MHz may be used for aeronautical mobile telemetry for flight testing by aircraft stations (see No. 1.83). Such use shall be in accordance with Resolution 416 (WRC-07) and shall not cause harmful interference to, nor claim protection from, the fixed-satellite and fixed services. Any such use does not preclude the use of this band by other mobile service applications or by other services to which this band is allocated on a co-primary basis and does not establish priority in the Radio Regulations. (WRC-07)

5.442 In the bands 4825-4835 MHz and 4950-4990 MHz, the allocation to the mobile service is restricted to the mobile, except aeronautical mobile, service. In Region 2 (except Brazil, Cuba, Guatemala, Paraguay, Uruguay and Venezuela), and in Australia, the band 4825-4835 MHz is also allocated to the aeronautical mobile service, limited to aeronautical mobile telemetry for flight testing by aircraft stations. Such use shall be in accordance with Resolution 416 (WRC-07) and shall not cause harmful interference to the fixed service. (WRC-07)

5.443 Different category of service: in Argentina, Australia and Canada, the allocation of the bands 4825-4835 MHz and 4950-4990 MHz to the radio astronomy service is on a primary basis (see No. 5.33).

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).

US385 Radio astronomy observations may be made in the bands 1350-1400 MHz, 1718.8-1722.2 MHz, and 4950-4990 MHz on an unprotected basis, and in the band 2655-2690 MHz on a secondary basis, at the following radio astronomy observatories:

Allen Telescope Array, Hat Creek, CA

Rectangle between latitudes 40° 00' N and 42° 00' N and between longitudes 120° 15' W and 122° 15' W.

NASA Goldstone Deep Space Communications Complex, Goldstone, CA

80 kilometers (50 mile) radius centered on 35° 20' N, 116° 53' W.

National Astronomy and Ionosphere Center, Arecibo, PR

Rectangle between latitudes 17° 30' N and 19° 00' N and between longitudes 65° 10' W and 68° 00' W.

National Radio Astronomy Observatory, Socorro, NM

Rectangle between latitudes 32° 30' N and 35° 30' N and between longitudes 106° 00' W and 109° 00' W.

National Radio Astronomy Observatory, Green Bank, WV

Rectangle between latitudes 37° 30' N and 39° 15' N and between longitudes 78° 30' W and 80° 30' W.

National Radio Astronomy Observatory, Very Long Baseline Array Stations

80 kilometer radius centered on:

North latitude

West longitude

Brewster, WA

48° 08'

119° 41'

Fort Davis, TX

30° 38'

103° 57'

Hancock, NH

42° 56'

71° 59'

Kitt Peak, AZ

31° 57'

111° 37'

Los Alamos, NM

35° 47'

106° 15'

Mauna Kea, HI

19° 48'

155° 27'

North Liberty, IA

41° 46'

91° 34'

Owens Valley, CA

37° 14'

118° 17'

Pie Town, NM

34° 18'

108° 07'

Saint Croix, VI

17° 45'

64° 35'

Owens Valley Radio Observatory, Big Pine, CA

Two contiguous rectangles, one between latitudes 36° 00' N and 37° 00' N and between longitudes 117° 40' W and 118° 30' W and the second between latitudes 37° 00' N and 38° 00' N and between longitudes 118° 00' W and 118° 50' W.

(a) In the bands 1350-1400 MHz and 4950-4990 MHz, every practicable effort will be made to avoid the assignment of frequencies to stations in the fixed and mobile services that could interfere with radio astronomy observations within the geographic areas given above. In addition, every practicable effort will be made to avoid assignment of frequencies in these bands to stations in the aeronautical mobile service which operate outside of those geographic areas, but which may cause harmful interference to the listed observatories. Should such assignments result in harmful interference to these observatories, the situation will be remedied to the extent practicable.

(b) In the band 2655-2690 MHz, for radio astronomy observations performed at the locations listed above, licensees are urged to coordinate their systems through the Electromagnetic Spectrum Management Unit, Division of Astronomical Sciences, National Science Foundation, Room 1030, 4201 Wilson Blvd., Arlington, VA 22230.



G122 In the bands 2300-2310 MHz, 2395-2400 MHz, 2400-2417 MHz, and 4940-4990 MHz, Federal operations may be authorized on a non-interference basis to authorized non-Federal operations, and shall not constrain the implementation of any non-Federal operations.


SpectrumWiki

 
4.9 GHz Public Safety Spectrum
Wi-Fi
Radio Astronomy Formaldehyde (H2CO) Observations


Related Documents, Links, and Multimedia:
FCC Proceeding (2)
Other (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 4.8 GHz 4.895 GHz 4.99 GHz
Wavelength 6.2 cm 6.1 cm 6.0 cm
Band designator(s) SHF; C-band (IEEE) SHF; C-band (IEEE) SHF; C-band (IEEE)
Isotropic collecting area 3.1 cm2 3.0 cm2 2.9 cm2
Free space loss (1 m) 46.1 dB 46.2 dB 46.4 dB
Free space loss (1 km) 106.1 dB 106.2 dB 106.4 dB
Free space loss (10 km) 126.1 dB 126.2 dB 126.4 dB
Free space loss (100 km) 146.1 dB 146.2 dB 146.4 dB
Free space loss (1000 km) 166.1 dB 166.2 dB 166.4 dB
Free space loss
(35,786 km = GEO orbit)
197.1 dB 197.3 dB 197.5 dB
Free space loss (378,370 km = Moon) 217.6 dB 217.8 dB 218.0 dB