Abstract

Electrical mode stirring in reverberating chambers for electromagnetic compatibility is accomplished by antennas that are loaded by variable reactances. The principle is derived from a network model of the chamber that employs measurable coupling factors. The concept is experimentally confirmed in the gigahertz-range for a 1.92 m x 1.84 m x 2 .91 m chamber with four conical antennas placed on one sidewall. One antenna is connected to a generator; the other three antennas are reactively loaded by variable short circuit plungers. The resonances are considerably shifted by varying the reactive loads.

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