EMC applications for military: Reverberation chamber tests

Choeysakul, C. and Schlagenhaufer, F. and Rattanakreep, P. and Hall, P. 2015. EMC applications for military: Reverberation chamber tests, 20th Asia-Pacific Conference on Communications (APCC), pp. 434-437. Pattaya: Institute of Electrical and Electronics Engineers.

Source Title

Proceedings of the 20th Asia-Pacific Conference on Communication, APCC 2014

DOI

10.1109/APCC.2014.7092851

ISBN

9781479964352

School

Department of Electrical and Computer Engineering

Remarks

Copyright © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

URI

http://hdl.handle.net/20.500.11937/20163

Collection

Curtin Research Publications

Abstract

Electrical and electronic equipment installed on military platforms must have very low electromagnetic emission and good immunity for the whole operational frequency range. Reverberation Chambers (RC) are tools for sensitive emission measurements and immunity tests against strong electromagnetic fields, at a lower cost than other techniques. Method of RC should be suitable for testing Military's electronic devices such as radio or radar system. However, RCs must be large for tests at low frequencies; for example, at 80 MHz are conventional RC must have dimensions up to 7 m by 15 m by 8 m. For military concern, the lowest operation frequency can be as low as 2 MHz (underwater communication can be lower). Conventional RCs can only be used above a certain frequency, the lowest usable frequency (LUF), as they require a minimum mode density (number of modes per frequency interval) in order for the stirrer to perform effectively and alter field distributions. Technique of MIMO RC [1, 2] can make RCs usable down to much lower frequencies; it can mean the dimensions of the chamber can be up to 6 times smaller. However, the composite Q-factor of RCs can be rather low at low frequencies, and this affects the sensitivity, and ultimately usability of an RC. This paper studies the possibility to increase composite Q-factor when RC is used at lower frequencies than conventional method.