Angular Sampling, Test Signal, and Near-Field Aspects for Over-The-Air Total Radiated Power Assessment in Anechoic Chambers

IEEE Access

Aidin Razavi¹  Anders Stjernman¹  Jonas Friden¹ 

[1] Ericsson Research, Ericsson AB, Gothenburg, Sweden;

关键词: Adaptive arrays;    near-field radiation pattern;    base stations;    5G mobile communication;    electromagnetic compatibility;    electromagnetics;   

DOI  :  10.1109/ACCESS.2018.2871708

来源: DOAJ

【 摘 要 】

5th-generation mobile network systems operating in millimeter-wave bands will employ base stations with integrated active antenna systems. Such systems are capable of beam-tracking using narrow beams obtained from antenna arrays. Regulatory limits for unwanted radio frequency and Over-The-Air methods for TRP of unwanted emissions are needed. The method investigated here uses power density measurements on a spherical surface in an anechoic chamber. Two major challenges with such a method are: need for a large number of angular points and search for a worst case antenna configuration per frequency for electrically large devices at high frequencies. These challenges are addressed by investigating sparse sampling and use of beam sweeping. Finally, it is investigated how and in which spatial regions near-field tangential electric field measurements can be used to assess TRP.

【 授权许可】

Unknown