Title: Expanded test frequency band and improved field uniformity in a reverberation chamber for networked system by dual-band quadratic residue diffusers

Authors: Eugene Rhee

Addresses: Department of Electronic Engineering, College of Engineering, Sangmyung University, 31, Sangmyeongdae-gil, Dongnam-gu, Cheonan-si, Chungcheongnam-do, (31066), South Korea

Abstract: This paper shows electromagnetic field characteristics in an electromagnetic reverberation chamber that can be used as a test facility for measuring electromagnetic interference and radiated immunity of networked systems. In the reverberation chamber, there is a dual-band diffuser for two different frequency bands and the dual-band diffuser is designed by the combination of different single-band Schroeder-type quadratic residue diffuser (QRD). Finite-difference time-domain (FDTD) numerical analysis method is used to analyse the distribution of electromagnetic fields inside the reverberation chamber. Compared with existing single-band diffuser, this dual-band diffuser in the reverberation chamber not only expands the test frequency band but also improves the performance of the reverberation chamber such as electromagnetic field uniformity, polarisation characteristics, power efficiency and tolerance of the reverberation chamber, which means that the reverberation chamber with this dual-band diffuser is a more efficient test facility than the reverberation chamber with existing units.

Keywords: reverberation chamber; diffuser; field uniformity; frequency band; electromagnetic compatibility; electromagnetic interference.

DOI: 10.1504/IJITST.2022.119685

International Journal of Internet Technology and Secured Transactions, 2022 Vol.12 No.1, pp.80 - 89

Received: 16 Dec 2020
Accepted: 11 Jan 2021
Published online: 14 Dec 2021 *