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Journal of the Korean Institute of Electromagnetic and Science 2001;1(1):37-42.
Forced Resonant Type Cutoff Cavity-Backed Slot Antenna Elements for Electromagnetic Power Transmission
Ki-Chai Kim1, Ick-Seung Kwon2
1School of Electrical Engineering and Computer Science, Yeungnam University
2Digital Mobile Comm. Lab., LG Electronics Inc.
Abstract
This paper presents the basic characteristics of a cutoff cavity-hacked slot antenna, for the application of spacetenna, with a feed post and a parasitic post inserted parallel to the slot. This type of antenna might effectively excite the slot and forcibly resonate the cavity by adding external reactance to the parasitic post. The Galerkin`s method of moments is used to analyze integral equations for the unknown electric current on each post and electric field in the slot. The value of external reactance for forced resonance is discussed by deriving a determining equation, the current distribution on each post and the radiation patterns are considered. The analysis is in excellent agreement with the experiment for the radiation patterns.
Key words: cavity-backed slot antenna, forced resonance, reactance loading, electromagnetic power transmission

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