Design of a Four-Septum TEM Cell for Immunity/Susceptibility Test

Fengchao XIAO  Yoshimitsu SUGANUMA  Kimitoshi MURANO  Majid TAYARANI  Yoshio KAMI  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.8   pp.3146-3151
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3146
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section of 2004 International Symposium on Electromagnetic Compatibility)
Category: Measurements
TEM cell,  four-septum TEM cell,  slowly rotating EM field,  radiated immunity/susceptibility test,  

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The four-septum transverse electromagnetic (TEM) cell is like the traditional TEM cell but has four plate-like septa in the internal space. A slowly rotating field can be easily generated in the four-septum TEM cell, thus radiated immunity/susceptibility characteristics of an EUT under arbitrary specific polarizations can be measured without rearranging the test setup. A design approach for the four-septum TEM cell is discussed in this paper. The characteristics of the cell are analyzed based on the telegrapher's equation and decomposition of the transmission mode into four independent modes. Then a design approach is given based on the analytical results. A prototype of the four-septum TEM cell based on the design is constructed and the characteristics of the prototype cell are experimentally evaluated. The validity and effectiveness of the design approach are confirmed.