Radio Regulations

Source: the Radio Regulations published by the International Telecommunication Union (ITU).

1.10

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)

Current WP 5C Res. 775 (Rev.WRC-23) › 71–76 GHz 81–86 GHz

Shared frequency bands

Bands this agenda item addresses jointly with other WRC-27 items (CPM Report Table 1). Click a band to open its spectrum page.

71–76 GHz

Also studied under: AI 1.16 AI 1.18

81–86 GHz

Also studied under: AI 1.18

At a glance Summary & background Regulatory Studies

At a glance Beta

Frequency band

71–76 GHz 81–86 GHz

Governing resolution

Res. 775 (Rev.WRC-23)

Responsible group WP 5C

Agenda-item type Technical

The band and its sensitive neighbours

FIXED

Fixed satellite

MOBILE

MOBILE-SATELLITE

BROADCASTING

BROADCASTING-SATELLITE

Radio astronomy

Blocks group a service with its direction and mode variants; the table names each allocation as the Radio Regulations name it.

Current framework

Services in this band

FIXED	Primary
FIXED-SATELLITE (space-to-Earth)	Primary
MOBILE	Primary
Mobile-satellite (space-to-Earth)	Primary
BROADCASTING	Primary
BROADCASTING-SATELLITE	Primary
FIXED-SATELLITE (Earth-to-space)	Primary
Mobile-satellite (Earth-to-space)	Primary
Radio astronomy	Primary
Space research (space-to-Earth)	Secondary

What's being studied — points to watch

Protecting E-band links

PFD/e.i.r.p. limits in Article 21 must keep satellite downlinks from raising interference into dense terrestrial point-to-point links.

Usable satellite access

The limits must still leave the satellite services a workable downlink, not a nominal one.

Two bands, similar issue

71–76 and 81–86 GHz share the same active-terrestrial-vs-satellite balance and are studied together.

Backhaul growth

5G/6G backhaul is expanding fast in E-band, so the protected terrestrial baseline is a moving target.

Preparation timeline

Dec 2023 WRC-23 agenda adopted

Dec 2023 WRC-23 agenda adopted
Dec 2023 CPM 27-1 studies allocated

Dec 2023 CPM 27-1 studies allocated
ITU-R studies 2026

ITU-R studies 2026
ITU-R studies 2027

ITU-R studies 2027
5–15 Apr 2027 CPM 27-2 final report

5–15 Apr 2027 CPM 27-2 final report
RTO Prep meetings 2027

RTO Prep meetings 2027
11–15 Oct 2027 RA-27

11–15 Oct 2027 RA-27
18 Oct–12 Nov 2027 WRC-27

18 Oct–12 Nov 2027 WRC-27

Dec 2023 WRC-23 agenda adopted
Dec 2023 CPM 27-1 studies allocated
ITU-R studies 2026
ITU-R studies 2027
5–15 Apr 2027 CPM 27-2 final report
RTO Prep meetings 2027
11–15 Oct 2027 RA-27
18 Oct–12 Nov 2027 WRC-27

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Source: ITU Radio Regulations, editions of 2008, 2012, 2016, 2020 and 2024. The English, French and Spanish texts are each taken from the official edition in that language, not translated from one another. Sources and citation.