Compatibility between EESS (passive) in band 23.6–24 GHz and 5G in band 24.25–27.5 GHz

Thibaut Caillet

doi:10.5802/crphys.67

Abstract

The 24.25–27.5 GHz band was allocated to IMT (International Mobile Telecommunication) during the World Radiocommunication Conference (WRC) after studies were elaborated between this potential allocation and the services in adjacent band and in particular with Earth Exploration by satellite in adjacent band. Several studies were evaluated during the WRC-19 cycle. This document describes only the studies undertaken by some European states for the protection of Earth exploration by satellite. The elements provided in this document are the basis of the European position for WRC-19 on the protection of passive EESS in 23.6–24 GHz.

Highlights

Many bands have been proposed for new IMT allocations during the cycle of World Radiocommunication Conference (WRC)-19 under agenda item 1.13 (24.25–27.5 GHz, 31.8 33.4 GHz, 37–40.5 GHz, 40.5–42.5 GHz, 42.5–43.5 GHz, 45.5–47 GHz, 47–47.2 GHz, 47.2–50.2 GHz, 50.4–52.6 GHz, 66–71 GHz, 71–76 GHz and 81–86 GHz)
Due to the facts that IMT equipment will be designed to operate in a large band (3.25 GHz) and that a low frequency distance between the center frequency of IMT equipment and passive band will exist (250 MHz, that means 1/13 of the total band), the Antenna System (AAS) will be able to create beamforming in adjacent band
For an elevation angle of 90°, when satellite is in the zenith of IMT equipment the clutter losses are equal to 0 due to body loss (dB). 4. 3 dB of polarization losses due to the IMT emissions in cross polarization and the EESS reception in linear

Summary

Introduction

Many bands have been proposed for new IMT allocations during the cycle of WRC-19 under agenda item 1.13 (24.25–27.5 GHz, 31.8 33.4 GHz, 37–40.5 GHz, 40.5–42.5 GHz, 42.5–43.5 GHz, 45.5–47 GHz, 47–47.2 GHz, 47.2–50.2 GHz, 50.4–52.6 GHz, 66–71 GHz, 71–76 GHz and 81–86 GHz). 2. The unwanted emissions of BS and UE in the band 23.6–24 GHz are defined in terms of Total Radiated Power (TRP) and represent respectively −24 dBW/200 MHz and −20 dBW/200 MHz (3 dB of ohmic losses were applied to the estimated unwanted conducted power). Due to the facts that IMT equipment will be designed to operate in a large band (3.25 GHz) and that a low frequency distance between the center frequency of IMT equipment and passive band will exist (250 MHz, that means 1/13 of the total band), the AAS will be able to create beamforming in adjacent band In this particular case, the parameter of the M.2101 model was modified in order to take into account the. −4 −4 −4 −4 changes in terms of wavelength of the radiated element and the spacing between them in the unwanted domain

Surface of study and IMT deployment

Losses between IMT network emissions and satellite

Simulations

Results

Conclusions and discussion