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)
Shared frequency bands
View full cross-reference →Bands this agenda item addresses jointly with other WRC-27 items (CPM Report Table 1). Click a band to open its spectrum page.
Executive summary
Agenda item 1.10 asks WRC-27 to set power-flux-density (PFD) and e.i.r.p. limits — in Article 21 of the Radio Regulations — for satellite downlinks of the fixed-, mobile- and broadcasting-satellite services in the 71–76 GHz and 81–86 GHz E-bands, so they protect the fixed and mobile services there, under Resolution 775 (Rev.WRC-23).
The E-bands are the workhorse of high-capacity terrestrial links, including 5G backhaul; as satellites begin to use them, the study defines the emission limits that let both coexist.
Background
71–76 and 81–86 GHz are allocated to both satellite services and terrestrial fixed and mobile services, but the hard limits that keep satellite downlinks from swamping terrestrial receivers were never fully written into Article 21.
Terrestrial operators have deployed dense point-to-point links in these bands for backhaul, and satellite operators now want to use them too. Resolution 775 opened the study to determine the PFD and e.i.r.p. limits that protect the terrestrial services while still giving the satellite services usable access.
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.