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Expansion of Test Frequency Band and Improvements of Field Uniformity in a Reverberation Chamber by Using Dual-Band Diffusers  

Lim Wook-Chae (Graduate School of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University)
Rhee Joong-Geun (Graduate School of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.1, 2006 , pp. 74-80 More about this Journal
Abstract
This paper presents the characteristics of electromagnetic field uniformity in a reverberation chamber that can be used alternatively for the analysis, test and evaluation of electromagnetic interference and immunity. The dual-band diffuser, which can be used at two different frequency bands in a reverberation chamber, is applied, and it is made of two different single-band Schroeder's Quadratic Residue Diffusers. The FDTD method is used to analyze the field characteristics. Compared with single-band diffuser, the dual-band diffuser shows the improvement in not only expansion of test frequency band but also in characteristics of the field uniformity, polarity, power efficiency, and tolerance. Therefore, the reverberation chamber with the dual-band diffuser is a better facility, for the analysis and measurement of electromagnetic interference and immunity, than the reverberation chamber with a single-band diffuser.
Keywords
Reverberation Chamber; Quadratic Residue Diffuser; Dual-Band Diffuser; Field Uniformity;
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