Title: Over-The-Air Measurements Under Extreme Temperature Conditions
Speaker: Benoit Derat | Senior Director for Systems & Projects / Antenna-Based Solutions at Rohde & Schwarz | AMTA Senior Member | Munich, Germany
Webinar Date: Friday Aug 29, 2024 | 11:00 AM-12:00 PM (noon) Eastern Time
Abstract
—5G communications have supported the deployment of millimeter-wave antenna array beam-steering technologies at an unprecedented commercial scale. As per 3GPP and CTIA test specifications, 5G millimeter-wave capable mobile phones must undergo a large number of tests in order to guarantee an adequate performance for preserving the integrity of the mobile network. The defined measurement methodology relies on farfield Over-The-Air (OTA) assessments in Compact Antenna Test Ranges (CATR). As temperature influences the active electronics in the wireless devices and hence the beam-forming characteristics, OTA measurements are also required in extreme conditions ranging from -10 to +55◦C. This paper presents an innovative realization of a CATR with an embedded thermal chamber, meeting all conformance / compliance testing requirements. Inventive steps which were taken are explained, showing how the complex engineering problem to design a chamber and a system compatible with all mandatory criteria was solved. Specific characteristics of the combined OTA-thermal solution are demonstrated through thermal and RF measurements.
Speaker Bio
Benoit Derat received the Engineering degree from SUPELEC, in 2002, and the Ph.D. degree (Hons.) in physics from the University of Paris XI, in 2006. From 2002 to 2008, he worked at SAGEM Mobiles, as an Antenna Design and Electromagnetics Research Engineer. In 2009, he founded ART-Fi, which created the first vector-array specific absorption rate measurement system. He operated as the CEO and the President of ART-Fi, before joining Rohde & Schwarz, Munich, in 2017. He is currently the Senior Director of Engineering for Vector Network Analyzers, Electromagnetic Compatibility, Over-The-Air and Antenna Test applications. Dr. Derat is a Senior Member of the Antenna Measurement Techniques Association (AMTA) and a Distinguished Lecturer of the IEEE EMC Society (2024 - 2025). He is the author of more than 80 scientific journals and conference papers, and an inventor on more than 40 patents, with main focus in antenna systems near and far-field characterization techniques.
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