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Allocations

Intro to Allocations

U.S. Non-Federal-Government Allocations

81 - 84 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) US297
MOBILE
MOBILE-SATELLITE (Earth-to-space)
RADIO ASTRONOMY
Space research (space-to-Earth)

US161 US342 US389

FCC Rule Parts:
RF Devices (15)
Fixed Microwave (101)

U.S. Federal Government Allocations

81 - 84 GHz
FIXED
FIXED-SATELLITE (Earth-to-space) US297
MOBILE
MOBILE-SATELLITE (Earth-to-space)
RADIO ASTRONOMY
Space research (space-to-Earth)

US161 US342 US389

ITU Region 1 Allocations

81 - 84 GHz
FIXED 5.338A
FIXED-SATELLITE (Earth-to-space)
MOBILE
MOBILE-SATELLITE (Earth-to-space)
RADIO ASTRONOMY
Space research (space-to-Earth)

5.149 5.561A

ITU Region 2 Allocations

81 - 84 GHz
FIXED 5.338A
FIXED-SATELLITE (Earth-to-space)
MOBILE
MOBILE-SATELLITE (Earth-to-space)
RADIO ASTRONOMY
Space research (space-to-Earth)

5.149 5.561A

ITU Region 3 Allocations

81 - 84 GHz
FIXED 5.338A
FIXED-SATELLITE (Earth-to-space)
MOBILE
MOBILE-SATELLITE (Earth-to-space)
RADIO ASTRONOMY
Space research (space-to-Earth)

5.149 5.561A

SpectrumWiki

E-band

70/80/90 GHz Bands

Unlicensed Level Probing Radars

Foreign Object Debris (FOD) detection radars

WRC-27 consideration of satellite power limits to protect fixed and mobile services

Footnotes

5.149 In making assignments to stations of other services to which the bands:
13 360-13 410 kHz,
25 550-25 670 kHz,
37.5-38.25 MHz,
73-74.6 MHz in Regions 1 and 3,
150.05-153 MHz in Region 1,
322-328.6 MHz,
406.1-410 MHz,
608-614 MHz in Regions 1 and 3,
1 330-1 400 MHz,
1 610.6-1 613.8 MHz,
1 660-1 670 MHz,
1 718.8-1 722.2 MHz,
2 655-2 690 MHz,
3 260-3 267 MHz,
3 332-3 339 MHz,
3 345.8-3 352.5 MHz,
4 825-4 835 MHz, 4 950-4 990 MHz,
4 990-5 000 MHz,
6 650-6 675.2 MHz,
10.6-10.68 GHz,
14.47-14.5 GHz,
22.01-22.21 GHz,
22.21-22.5 GHz,
22.81-22.86 GHz,
23.07-23.12 GHz,
31.2-31.3 GHz,
31.5-31.8 GHz in Regions 1 and 3,
36.43-36.5 GHz,
42.5-43.5 GHz,
48.94-49.04 GHz,
76-86 GHz,
92-94 GHz,
94.1-100 GHz, 102-109.5 GHz,
111.8-114.25 GHz,
128.33-128.59 GHz,
129.23-129.49 GHz,
130-134 GHz,
136-148.5 GHz,
151.5-158.5 GHz,
168.59-168.93 GHz,
171.11-171.45 GHz,
172.31-172.65 GHz,
173.52-173.85 GHz,
195.75-196.15 GHz,
209-226 GHz,
241-250 GHz,
252-275 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)

5.338A In the frequency bands 1 350-1 400 MHz, 1 427-1 452 MHz, 22.55-23.55 GHz, 24.25-27.5 GHz, 30-31.3 GHz, 49.7 50.2 GHz, 50.4-50.9 GHz, 51.4-52.4 GHz, 52.4-52.6 GHz, 81-86 GHz and 92-94 GHz, Resolution 750 (Rev.WRC 19) applies. (WRC 19)

5.561A The 81-81.5 GHz band is also allocated to the amateur and amateur-satellite services on a secondary basis. (WRC 2000)

US161 In the bands 81-86 GHz, 92-94 GHz, and 94.1-95 GHz and within the coordination distances indicated below, assignments to allocated services shall be coordinated with the following radio astronomy observatories. New observatories shall not receive protection from fixed stations that are licensed to operate in the one hundred most populous urbanized areas as defined by the U.S. Census Bureau for the year 2000.

(a) Within 25 km of the National Radio Astronomy Observatory’s (NRAO’s) Very Long Baseline Array (VLBA) Stations:

State	VLBA Station	Lat. (N)	Long. (W)
AZ	Kitt Peak	31° 57` 23"	111° 36` 45"
CA	Owens Valley	37° 13` 54"	118° 16` 37"
HI	Mauna Kea	19° 48` 05"	155° 27` 20"
IA	North Liberty	41° 46` 17"	091° 34` 27"
NH	Hancock	42° 56` 01"	071° 59` 12"
NM	Los Alamos	35° 46` 30"	106° 14` 44"
NM	Pie Town	34° 18` 04"	108° 07` 09"
TX	Fort Davis	30° 38` 06"	103° 56` 41"
VI	Saint Croix	17° 45` 24"	064° 35` 01"
WA	Brewster	48° 07` 52"	119° 41` 00"

(b) Within 150 km of the following observatories:

State	Telescope and site	Lat. (N)	Long. (W)
AZ	Heinrich Hertz Submillimeter Observatory, Mt. Graham	32° 42` 06"	109° 53` 28"
AZ	University of Arizona 12-m Telescope, Kitt Peak	31° 57` 12"	111° 36` 53"
CA	Caltech Telescope, Owens Valley	37° 13` 54"	118° 17` 36"
CA	Combined Array for Research in Millimeter-wave Astronomy (CARMA)	37° 16` 43"	118° 08` 32"
HI	James Clerk Maxwell Telescope, Mauna Kea	19° 49` 33"	155° 28` 47"
MA	Haystack Observatory, Westford	42° 37` 24"	071° 29` 18"
NM	NRAO’s Very Large Array, Socorro	34° 04` 44"	107° 37` 06"
WV	NRAO’s Robert C. Byrd Telescope, Green Bank	38° 25` 59"	079° 50` 23"

Note: Satisfactory completion of the coordination procedure utilizing the automated mechanism, see 47 CFR 101.1523, will be deemed to establish sufficient separation from radio astronomy observatories, regardless of whether the distances set forth above are met.

US297 The bands 47.2-49.2 GHz and 81-82.5 GHz are also available for feeder links for the broadcasting-satellite service.

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

13 360-13 410 kHz	42.77-42.87 GHz*
25 550-25 670 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).

US389 In the bands 71-76 GHz and 81-86 GHz, stations in the fixed, mobile, and broadcasting services shall not cause harmful interference to, nor claim protection from, Federal stations in the fixed-satellite service at any of the following 28 military installations:

Military Installation	State	Nearby city
Redstone Arsenal	AL	Huntsville
Fort Huachuca	AZ	Sierra Vista
Yuma Proving Ground	AZ	Yuma
Beale AFB	CA	Marysville
Camp Parks Reserve Forces Training Area	CA	Dublin
China Lake Naval Air Weapons Station	CA	Ridgecrest
Edwards AFB	CA	Rosamond
Fort Irwin	CA	Barstow
Marine Corps Air Ground Combat Center	CA	Twentynine Palms
Buckley AFB	CO	Aurora (Denver)
Schriever AFB	CO	Colorado Springs
Fort Gordon	GA	Augusta
Naval Satellite Operations Center	GU	Finegayan (Guam)
Naval Computer and Telecommunications Area Master Station, Pacific	HI	Wahiawa (Oahu Is.)
Fort Detrick	MD	Frederick
Nellis AFB	NV	Las Vegas
Nevada Test Site	NV	Amargosa Valley
Tonapah Test Range Airfield	NV	Tonapah
Cannon AFB	NM	Clovis
White Sands Missile Range	NM	White Sands
Dyess AFB	TX	Abilene
Fort Bliss	TX	El Paso
Fort Sam Houston	TX	San Antonio
Goodfellow AFB	TX	San Angelo
Kelly AFB	TX	San Antonio
Utah Test and Training Range	UT	…
Fort Belvoir	VA	Alexandria
Naval Satellite Operations Center	VA	Chesapeake

SpectrumWiki

E-band

The range 71-76 and 81-86 GHz is considered the E-band. According to ETSI:

"E-Band: since 2000, regulators have made available high frequency bands at 71-76 GHz and 81-86 GHz. E-Band enables gigabit-per-second data rates given the huge amount of available spectrum (10 GHz) without any oxygen absorption, thus allowing longer distances compared to V-Band."

The E-band is frequently considered to also include the 92-95 GHz band.

Please see the document section for a link to an ETSI report on worldwide regulation of V-band and E-band.

Frequency Bands
Band	Use	Service	Table
71 - 76 GHz	E-band	-	-
81 - 86 GHz	E-band	-	-
92 - 95 GHz	E-band	-	-

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70/80/90 GHz Bands

According to FCC document DA 16-974:

In 2003 the Commission adopted a Report and Order establishing service rules to promote non-Federal development and use of the “millimeter wave” spectrum in the 71-76 GHz, 81-86 GHz and 92-95 GHz bands on a shared basis with Federal Government operations. It modified those rules on reconsideration in 2005. The Commission adopted a flexible and innovative regulatory framework for the 70/80/90 GHz bands that allows for the issuance of an unlimited number of nonexclusive, nationwide licenses to non-Federal Government entities for a total of 12.9 gigahertz of spectrum allocated for commercial use. These licenses serve as a prerequisite for registering individual point-to-point links in a link registration system developed and managed by one or more third-party database managers. A licensee is not authorized to operate a link under its nationwide license until the link is both (1) coordinated with the National Telecommunications and Information Administration (NTIA) with respect to Federal Government operations and (2) registered as an approved link. The Report and Order noted that, in the past, the Commission had introduced market forces into the frequency coordination process wherever possible and appropriate because competition among coordinators promotes cost-based pricing and provides incentives for enhancing customer link management. Accordingly, the Commission directed the Bureau to select one or more database managers pursuant to its existing delegated authority and to consider the benefits of competition during the selection process. On that basis, the Commission determined that there was no reason to set limits on the fees charged by a
database manager.

In March 2004 the Bureau issued a public notice seeking proposals from parties interested in developing and managing the link registration system, and four parties initially submitted proposals. One party decided to remove its proposal from consideration, and the remaining three ultimately submitted an amended joint proposal on September 9, 2004 (Joint Proposal). Later in September 2004, the Bureau designated three companies to be Database Managers for the 70/80/90 GHz bands: Frequency Finder, Inc. (FFI), Micronet Communications, Inc. (Micronet), and Comsearch. In doing so, the Bureau rejected Comsearch’s original proposal to restrict frequency management in the 70/80/90 GHz bands to a single manager. The Bureau also reserved the discretion to designate additional managers or change the current designations at a later date if circumstances indicated that such action was warranted.

The Designation Order acknowledged that the Commission had envisioned a single, shared database if more than one database manager were selected, but the Bureau decided that it could accomplish the same purpose by accepting a joint proposal by the Database Managers to link their separate databases through coordinated communications to form a unified link registration system.

Accordingly, the Bureau required the Database Managers to build a cooperative environment to expedite link registrations through their combined efforts, sharing link information on a continuous basis to provide users, the public and the Commission with access to the most up to-date link information.

Database Managers register links and maintain a record of the requested and approved links for each licensee. In the event of an interference dispute, interference protection rights with regard to affected links are established based on the date and time of link registration, i.e., as between two or more links experiencing or causing interference, the link with the earliest registration date would acquire the right to protection from the later registered link or links, and so on in order of priority based upon the earliest date registered. The Designation Order noted that the Commission had expressly stated that Database Managers would not have authority to recommend specific frequencies to users, but would be responsible for keeping current link registration information to aid in resolution of interference disputes.

In 2005 the Commission revised its rules to (i) require licensees, for each link as part of the registration process, to submit a frequency interference analysis to a Database Manager, and (ii) direct the Database Managers to retain such analyses electronically for subsequent review by the public to aid in the resolution of any interference disputes that might subsequently arise. The Commission foresaw little likelihood that any such disputes would develop after operations commenced in the 70/80/90 GHz bands, but it provided an avenue for interference complaints to be submitted to, and resolved by, the Commission. The Reconsideration Order clarified that the Commission was neither requiring nor precluding Database Managers from providing additional services such as frequency coordination, link design or interference analyses.

Frequency Bands
Band	Use	Service	Table
71 - 76 GHz	70/80/90 GHz Band	Fixed	N
81 - 86 GHz	70/80/90 GHz Band	Fixed	N
92 - 95 GHz	70/80/90 GHz Band	Fixed	N

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Unlicensed Level Probing Radars

The FCC has released a Notice of Proposed Rule Making that would allow downward-pointing, unlicensed level probing radars, for use both in tanks and outdoors, at 5.925-7.250, 24.05-29, and 75-85 GHz.

Proposed EIRP boresight emissions limits are:

5.925-7.250 GHz: -33 dBm/MHz average and +7 dBm across 50 MHz.
24.05-29 GHz: -14 dBm/MHz average and +26 dBm across 50 MHz
75-85 GHz: -3 dBm/MHz average and +34 dBm across 50 MHz

Proposed average emissions limits to the sides and upward are:

5.925-7.250 GHz: -55 dBm/MHz
24.05-29 GHz: -41.3 dBm/MHz
75-85 GHz: -41.3 dBm/MHz

Frequency Bands
Band	Use	Service	Table
5925 - 7250 MHz	-	-	N
24.05 - 29 GHz	-	-	N
75 - 85 GHz	-	-	N

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Foreign Object Debris (FOD) detection radars

According to the FCC, "Foreign Object Debris (FOD) at airports, including any substance, debris, or object in a location that can damage aircraft or equipment, can seriously threaten the safety of airport personnel and airline passengers and can have a negative impact on airport logistics and operations." (FCC 11-185).

The FCC has granted a waiver to Trex Enterprises Corporation to build FOD detection radars, and for the radars to be operated at airports under Part 90 of the FCC rules. The Trex devices are limited to 100 mW transmit power, 45 dBi gain antennas, 35 dBW total EIRP, vertical polarization, 3 dB beamwidth of 1 deg (elevation) by 0.4 deg (az), and FMCW (elevation scan) chirp rate of 139.5 Hz.

Through the same document (FCC 11-185), the FCC proposes broader flexibility to operate FOD detection radars, and other radars, in the 78-81 GHz band on an unlicensed basis under Part 15.

According to the Trex Enterprises' Web site, full surface coverage "FOD Finder" detection vehicles are already operating at Chicago O'Hare, Honolulu, and San Diego airports, and Elmendorf, Hill, and Holloman Air Force bases.

Frequency Bands
Band	Use	Service	Table
78 - 81 GHz	Foreign Object Debris (FOD) detection radars	Radiolocation	-

External Links:

FCC Foreign Object Debris Radar NPRM & Order (FCC 11-185)

Trex Enterprises FOD Finder Website

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WRC-27 consideration of satellite power limits to protect fixed and mobile services

WRC-27 agenda item 1.10:

to consider developing power flux-density and equivalent isotropically radiated power limits for inclusion in Article 21 of the Radio Regulations for the fixed-satellite, mobile-satellite and broadcasting-satellite services to protect the fixed and mobile services in the frequency bands 71-76 GHz and 81-86 GHz, in accordance with Resolution 775 (Rev.WRC-23)

Frequency Bands
Band	Use	Service	Table
71 - 76 GHz	Consideration of satellite power limits to protect fixed and mobile services	-	-
81 - 86 GHz	Consideration of satellite power limits to protect fixed and mobile services	-	-

External Links:

WRC-27 agenda (see Annex 1)

Resolution 775 (WRC-23)

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Related Documents, Links, and Multimedia:

FCC Proceeding (5)

Further Notice of Proposed Rule Making on Regulations for Level Probing Radars

In this Further Notice of Proposed Rule Making (FNPRM), we are expanding the scope of
the above-referenced proceeding to propose a set of technical rules for the operation of unlicensed
level probing radars (LPR) in several frequency bands. LPR devices are low-power radars that
measure the level (relative height) of various substances in man-made or natural containments. In
open-air environments, LPR devices may be used to measure levels of materials such as coal piles or
water basin levels. An LPR device also may be installed inside an enclosure, e.g., a tank made of
materials such as steel or fiberglass and commonly referred to as a tank level probing radar (TLPR)
that could be filled with liquids or granulates. In the Notice of Proposed Rule Making and Order
(Notice and Order) in this proceeding, we proposed rules applicable only to TLPR devices for
operation in the 77-81 GHz band inside steel and concrete tanks, as that was the use requested by the
initial proponents. During the pendency of the rulemaking proceeding, but outside this proceeding, we received waiver requests and other inquiries regarding outdoor use on additional frequencies
under existing Part 15 rules for unlicensed devices.4 To address the apparent need for a
comprehensive and consistent approach to LPR devices, we are proposing in this FNPRM rules that
would apply to the operation of LPR devices installed in both open-air environments and inside
storage tanks in the following frequency bands: 5.925-7.250 GHz, 24.05-29.00 GHz, and 75-85 GHz.

Frequencies/Bands

5925 - 7250 MHz

24.05 - 29 GHz

75 - 85 GHz

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: March 28, 2012
Fcc Docket(s): ET 10-23

Further Notice of Proposed Rule Making on Regulations for Level Probing Radars

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Amendment of the Commission's Rules to Permit Radiolocation Operations in the 78-81 GHz Band

Foreign object debris (FOD) at airports, including any substance, debris, or object in a
location that can damage aircraft or equipment, can seriously threaten the safety of airport personnel and
airline passengers and can have a negative impact on airport logistics and operations. According to the
Federal Aviation Administration (FAA), FOD “has the potential to damage aircraft during critical phases
of flight, which can lead to catastrophic loss of life and airframe, and at the very least increased
maintenance and operating costs.” Moreover, the direct maintenance costs to airlines caused by FOD
have been estimated to be one to four billion dollars per year. Trex Enterprises Corporation (Trex) has
developed radar technology that meets the FAA’s guidance and performance specifications for FOD
detection equipment and can reduce this risk to personal safety and property by detecting the presence of
FOD on airport runways. In this Notice of Proposed Rule Making and Order, we seek comment on the
best way to enable the use of this new safety-related technology, and in the interim we grant Trex’s
request for a waiver to permit certification and use of FOD radar detection equipment operating in the 78-
81 GHz band, pending the outcome of this rulemaking proceeding.

Frequencies/Bands

78 - 81 GHz

Services

Space Research (space-to-Earth)

Amateur-satellite

Radio Astronomy

Radiolocation

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: December 20, 2011
Fcc Docket(s): WT 11-202, RM-11612

Amendment of the Commission's Rules to Permit Radiolocation Operations in the 78-81 GHz Band

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FCC Above 24 GHz Mobile Radio Services Notice of Inquiry

In this Notice of Inquiry, we begin a proceeding to examine the potential for the provision of mobile radio services in bands above 24 GHz. As technologies continue to evolve, innovators are working to tap into the potential of using high-band spectrum for mobile services. In particular, industry and technical groups are beginning to examine the use of higher frequencies sometimes known as millimeter wave (mmW) bands for mobile use. This examination of the possible uses of the mmW bands for mobile use takes place within the context of broader efforts to develop technical standards for so-called Fifth Generation (5G) mobile services. In view of the technological and marketplace developments outlined in this item, we seek to discern what frequency bands above 24 GHz would be most suitable for mobile services, and to begin developing a record on mobile service rules and a licensing framework for mobile services in those bands.

Frequencies/Bands

24.25 - 24.45 GHz

25.05 - 25.25 GHz

27.5 - 28.35 GHz

29.1 - 29.25 GHz

31 - 31.3 GHz

37 - 38.6 GHz

38.6 - 40 GHz

42 - 42.5 GHz

57 - 71 GHz

71 - 76 GHz

81 - 86 GHz

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: June 23, 2015

FCC Above 24 GHz Mobile Radio Services Notice of Inquiry

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FCC Above 24 GHz Report and Order and Further Notice of Proposed Rulemaking

According to the FCC:

Today, we take a significant step towards securing the Nation’s future in the next generational evolution of wireless technology to so-called 5G. We build upon years of successful spectrum policy – including flexible use, unlicensed, and sharing policies – to create service rules for using four spectrum bands above 24 GHz. These high frequencies previously have been best suited for satellite or fixed microwave applications; however, recent technological breakthroughs have newly enabled advanced mobile services in these bands, notably including very high speed and low latency services. To promote the deployment of these highly beneficial technologies, we are acting quickly –- more quickly than most of our counterparts around the world – to establish a coherent framework built on a robust public record. In addition to this significant step forward, we will also continue to explore new opportunities to make additional bands available and to explore other issues, including robust Federal sharing, raised in the accompanying Further Notice of Proposed Rulemaking.

Frequencies/Bands

24.25 - 24.45 GHz

24.75 - 25.25 GHz

27.5 - 28.35 GHz

31.8 - 33 GHz

37 - 40 GHz

42 - 42.5 GHz

47.2 - 50.2 GHz

50.4 - 52.6 GHz

64 - 71 GHz

71 - 76 GHz

81 - 86 GHz

95 - 300 GHz

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: September 21, 2016
Fcc Docket(s): GN 14-177, IB 15-256, RM-1164, WT 10-112, IB 97-95

FCC Above 24 GHz Report and Order and Further Notice of Proposed Rulemaking

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FCC 70/80/90 GHz Report and Order and Further Notice of Proposed Rulemaking

Specifically, based on the record and following extensive consultation with federal stakeholders, in this Report and Order we authorize certain point-to-point links to endpoints in motion in the 71–76 GHz (the 70 GHz band) and 81–86 GHz (the 80 GHz band) bands under our part 101 rules to facilitate the use of these frequencies for access to broadband services on aircraft and ships. We also update our rules to permit the use of smaller and lower-cost antennas to facilitate the provision of backhaul service in the 70 GHz and 80 GHz bands and mandate a channelization plan in those bands. And we further adopt changes to the link registration process in the 70/80/90 GHz bands to require certification of construction of registered links, which will promote more efficient use of this spectrum and improve the accuracy of the link registration database. Finally, in the Further Notice, we seek comment on the potential inclusion of ship-to-aerostat transmissions as part of maritime operations otherwise authorized in this Report and Order and of Fixed Satellite Service (FSS) earth stations in our light-licensing regime for the 70 GHz and 80 GHz bands.

Frequencies/Bands

94.1 - 95 MHz

71 - 76 GHz

81 - 86 GHz

92 - 94 GHz

Services

Fixed

Document type and status: FCC proceeding (Current)
Document date or date of hyperlink query: July 26, 2024
Fcc Docket(s): WT Docket 20-133

FCC 70/80/90 GHz Report and Order and Further Notice of Proposed Rulemaking

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White Paper (1)

Other (1)

Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	81 GHz	82.5 GHz	84 GHz
Wavelength	3.7 mm	3.6 mm	3.6 mm
Band designator(s)	EHF (millimeter wave); W-band (IEEE)	EHF (millimeter wave); W-band (IEEE)	EHF (millimeter wave); W-band (IEEE)
Isotropic collecting area	1.1 mm²	1.1 mm²	1.0 mm²
Free space loss (1 m)	70.6 dB	70.8 dB	70.9 dB
Free space loss (1 km)	130.6 dB	130.8 dB	130.9 dB
Free space loss (10 km)	150.6 dB	150.8 dB	150.9 dB
Free space loss (100 km)	170.6 dB	170.8 dB	170.9 dB
Free space loss (1000 km)	190.6 dB	190.8 dB	190.9 dB
Free space loss (35,786 km = GEO orbit)	221.7 dB	221.9 dB	222.0 dB
Free space loss (378,370 km = Moon)	242.2 dB	242.3 dB	242.5 dB