SpectrumWiki

Radio spectrum allocations

Look up a frequency or a range.

Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz

3.7 GHz (3,700,000,000 Hz)

U.S. Federal Government Allocations

3700 – 4200 MHz

ITU Region 1 Allocations

3600 – 4200 MHz

FIXED

FIXED-SATELLITE (space-to-Earth)

Mobile

ITU Region 2 Allocations

3700 – 4200 MHz

FIXED

FIXED-SATELLITE (space-to-Earth)

MOBILE except aeronautical mobile

ITU Region 3 Allocations

3700 – 4200 MHz

FIXED

FIXED-SATELLITE (space-to-Earth)

MOBILE except aeronautical mobile

Footnotes

  • NG182 In the band 3700-4200 MHz, the following provisions shall apply:

      (a) Except as provided in paragraph (c)(1), any currently authorized space stations serving the contiguous United States may continue to operate on a primary basis, but no applications for new space station authorizations or new petitions for market access shall be accepted for filing after June 21, 2018, other than applications by existing operators in the band seeking to make more efficient use of the band 4000-4200 MHz. Applications for extension, cancellation, replacement, or modification of existing space station authorizations in the band will continue to be accepted and processed normally.

      (b) In areas outside the contiguous United States, the band 3700-4000 MHz is also allocated to the fixed-satellite service (space-to-Earth) on a primary basis.

      (c) In the contiguous United States, i.e., the contiguous 48 states and the District of Columbia as defined by Partial Economic Areas Nos. 1-41, 43-211, 213-263, 265-297, 299-359, and 361-411, which includes areas within 12 nautical miles of the U.S. Gulf coastline (see § 27.6(m) of this chapter), the following provisions apply:

        (1) Incumbent use of the fixed-satellite service (space-to-Earth) in the band 3700-4000 MHz is subject to the provisions of §§ 25.138, 25.147, 25.203(n) and part 27, subpart O of this chapter;

        (2) Fixed service licensees authorized as of April 19, 2018, pursuant to part 101 of this chapter, must self-relocate their point-to-point links out of the band 3700-4200 MHz by December 5, 2023;

        (3) In the band 3980-4000 MHz, no new fixed or mobile operations will be permitted until specified by Commission rule, order, or notice.

  • NG457A  Earth stations on vessels (ESVs), as regulated under 47 CFR part 25, are an application of the fixed-satellite service and the following provisions shall apply:

      (a) In the band 3700-4200 MHz, ESVs may be authorized to receive FSS signals from geostationary satellites. ESVs in motion are subject to the condition that these earth stations may not claim protection from transmissions of non-Federal stations in the fixed and mobile except aeronautical mobile services. While docked, ESVs receiving in the band 4000-4200 MHz may be coordinated for up to 180 days, renewable. NG182 applies to incumbent licensees that provide service to ESVs in the band 3700-4000 MHz.

      (b) In the band 5925-6425 MHz, ESVs may be authorized to transmit to geostationary satellites on a primary basis.

Wiki entries

Standard LTE Bands

Current Use
3600–3800 MHz LTE band 43 TDD
The following bands have been defined by 3GPP as standard LTE bands for Frequency Division Duplex (FDD, where mobile and base stations transmit in separate bands) and Time Division Duplex (TDD, where mobiles and bases transmit and receive on the same frequency). These bands are defined in 3GPP TS 36.101 (link below).

Note that bands 15 & 16 and 30-32 are not defined, and the FDD band 29 is used for downlink-only for carrier aggregation, so it has no corresponding uplink band.

Uplinks refer to the frequencies used for handsets and other user devices to transmit to the base station, and downlinks refer to frequencies used by base stations to transmit to the user devices.

WRC 23 Agenda Item 1.2 IMT identification

Proposed Use
3600–3800 MHz Possible IMT identification
"to consider identification of the frequency bands 3 300-3 400 MHz, 3 600-3 800 MHz, 6 425-7 025 MHz, 7 025-7 125 MHz and 10.0-10.5 GHz for International Mobile Telecommunications (IMT), including possible additional allocations to the mobile service on a primary basis, in accordance with Resolution 245 (WRC-19);"

WRC-23 Agenda Item 1.3

Proposed Use
3600–3800 MHz Proposed primary allocation to mobile service in Region 1
"to consider primary allocation of the band 3 600-3 800 MHz to mobile service within Region 1 and take appropriate regulatory actions, in accordance with Resolution 246 (WRC-19);"

4 GHz Fixed Service Band

Current Use
3700–4200 MHz
The 4 GHz fixed service band is shared on a co-primary basis with the Fixed Satellite Service. The very large number of registered C-band receive-only earth stations, each one entitled to interference protection, has largely ruled out the frequency coordination of new 4 GHz fixed service links in much of the country.

Common Carrier Fixed Point-to-Point Microwave

Current Use
3700–4200 MHz Common Carrier Fixed Point-to-Point Microwave (max bandwidth 20 MHz)
These bands are permitted for use by common carrier fixed point-to-point microwave systems under Part 101, Subparts C & I of the FCC rules.

Geostationary Fixed Satellite Service (GSO FSS)

Current Use
3700–4200 MHz C-band GSO FSS Downlink
The "C-band" is the workhorse of the Geostationary Fixed Satellite Service (GSO FSS), with 3.7—4.2 GHz the downlink band and its associated uplink 5.925—6.425 GHz. More generally, the 4—8 GHz spectrum is designated as C-band.

Cable TV networks use the C-band to provide programming to cable systems. Program package providers directly serve viewers with home satellite dish receivers (Direct-to-Home FSS or DTH-FSS, a service also available in the Ku-band, see 11.7—12.2 GHz).

Many radio stations receive programming by C-band satellite, and international telephone and data traffic travel over the satellites of the International Telecommunications Satellite Organization (Intelsat) and its competitors in the 4/6 and 11/14 GHz bands.

The C-band also is used for tracking, telemetry, and control (TTC) of satellites while transferring them to final orbit position. Satellite operators want to expand TTC to adjacent spectrum (see 3.65—3.7 GHz).