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A Coaxial Waveguide-based Spatial Combiner Using Finline-to-Microstrip Transitions  

Kim, Bo-Ki (광운대학교 전파공학과)
Lee, Su-Hyun (광운대학교 전파공학과)
Kim, Hyoung-Jong (광운대학교 전파공학과)
Shin, Suk-Woo (광운대학교 전파공학과)
Kim, Sang-Hoon (광운대학교 전파공학과)
Kim, Jae-Duk (광운대학교 전파공학과)
Choi, Jin-Joo (광운대학교 전자융합공학과)
Kim, Seon-Joo (국방과학연구소)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.10, no.5, 2011 , pp. 79-86 More about this Journal
Abstract
In this paper, a S-band coaxial waveguide-based spatial combiner is proposed. The proposed combiner consists of coaxial waveguide, impedance transformer, and finline-to-microstrip transformer. The coaxial waveguide is used as the host of the combining circuits for higher output power and better uniformity by equally distributing the input power to each element. The finline-to-microstrip transformer is designed by using antipodal antenna, and obtained low reflection coefficient by applying the small reflection theorem. The measurement results show the coaxial waveguide combiner has a maximum combining efficiency of 95%.
Keywords
Spatial combiner; combining efficiency; coaxial waveguide; finline-to-microstrip transitions; small reflection;
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