U.S. Non-Federal-Government Allocations
3600 - 3650 MHz
FIXED-SATELLITE (space-to-Earth) US107 US245
MOBILE except aeronautical mobile

U.S. Federal Government Allocations
3550 - 3650 MHz

ITU Region 1 Allocations
3600 - 4200 MHz
FIXED-SATELLITE (space-to-Earth)

ITU Region 2 Allocations
3500 - 3700 MHz
FIXED-SATELLITE (space-to-Earth)
MOBILE except aeronautical mobile
Radiolocation 5.433

ITU Region 3 Allocations
3600 - 3700 MHz
FIXED-SATELLITE (space-to-Earth)
MOBILE except aeronautical mobile
Radiolocation 5.433



5.433 In Regions 2 and 3, in the band 3400-3600 MHz the radiolocation service is allocated on a primary basis. However, all administrations operating radiolocation systems in this band are urged to cease operations by 1985. Thereafter, administrations shall take all practicable steps to protect the fixed-satellite service and coordination requirements shall not be imposed on the fixed-satellite service.

5.435 In Japan, in the band 3620-3700 MHz, the radiolocation service is excluded.

Could not find US105

Could not find US107

US245 In the bands 3600-3650 MHz (space-to-Earth), 4500-4800 MHz (space-to-Earth), and 5850-5925 MHz (Earth-to-space), the use of the non-Federal fixed-satellite service is limited to international inter-continental systems and is subject to case-by-case electromagnetic compatibility analysis. The FCC's policy for these bands is codified at 47 CFR 2.108.

Could not find US433

G59 In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Federal non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments.

G110 Federal ground-based stations in the aeronautical radionavigation service may be authorized between 3500-3650 MHz when accommodation in the band 2700-2900 MHz is not technically and/or economically feasible.


Aeronautical Radio Altimeters
4 GHz Fixed Service Band
Geostationary Fixed Satellite Service (GSO FSS)
Citizens Broadband Radio Service (CBRS)
Common Carrier Fixed Point-to-Point Microwave
FCC Proposed Rules for Citizens Broadband Service
SPN-43 Shipborne Radar
Standard LTE Bands
UK Broadband
WRC 23 Agenda Item 1.2 IMT identification
WRC-23 Agenda Item 1.3
SPY-1 Shipborne Air Surveillance Radar
Through-wall Radar waiver
Actions to support FSS Earth stations in 3400-4200 MHz (WRC-15 Agenda Item 9.1.5)

Related Documents, Links, and Multimedia:
FCC Proceeding (5)
Band Plan (1)
Other (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 3.5 GHz 3.85 GHz 4.2 GHz
Wavelength 8.6 cm 7.8 cm 7.1 cm
Band designator(s) SHF; S-band (IEEE) SHF; S-band (IEEE) SHF; C-band (IEEE)
Isotropic collecting area 5.8 cm2 4.8 cm2 4.1 cm2
Free space loss (1 m) 43.6 dB 44.2 dB 43.8 dB
Free space loss (1 km) 103.6 dB 104.2 dB 103.8 dB
Free space loss (10 km) 123.6 dB 124.2 dB 123.8 dB
Free space loss (100 km) 143.6 dB 144.2 dB 143.8 dB
Free space loss (1000 km) 163.6 dB 164.2 dB 163.8 dB
Free space loss
(35,786 km = GEO orbit)
194.7 dB 195.2 dB 194.9 dB
Free space loss (378,370 km = Moon) 215.1 dB 215.7 dB 215.4 dB