Journal of the Korean Institute of Telematics and Electronics D (전자공학회논문지D)
- Volume 36D Issue 8
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- Pages.36-44
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- 1999
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- 1226-5845(pISSN)
Full-Wave Analysis, Design and Fabrication of Duplexer by Mode Matching Method for Ka-Band Transponder
모드정합법에 의한 Ka-밴드 위성중계기용 듀플렉서의 Full-Wave 분석 및 설계${\cdot}$ 제작에 관한 연구
- Lee, Yong-Min (Division of Ceramics, KIST) ;
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Ra, Keuk-Hwan
(Department of Electronic Engineering, Kwangwoon University)
- Published : 1999.08.01
Abstract
This paper presents the design and fabrication of the duplexer for a Ka-band satellite transponder which is analyzed transmission characteristics by calculating the generalized scattering matrix using mode matching method. It is composed of 2 bandpass filters, coupled with H-plane T-junction having symmetrical inductive iris and E-plane metal insert structures. Compared with the size and weight of the Rx and Tx filter loaded with a transponders respectively, those of the duplexer can be effectively reduced. In a high power transmission, the variation of the filter characteristics is minimized by the scheme that irises are extended to the exterior of H-plane of the waveguide. This scheme needs no extra heat sinks for dissipating high power. The duplexer is designed to improve the simplification, durability and reliability by eliminating tuning screws, which have been used to compensate for the characteristics of fabricated filters. The bandpass filters of the duplexer show the insertion loss of less than 1.2 dB and the return loss in excess of 15 dB. The isolations of more than 65 dB have been achieved between Rx and Tx filter.
본 논문에서는 Ka-밴드 위성중계기용 듀플렉서의 설계를 위해 모드정합법에 의해 산란행렬을 계산하여 설계한 필터의 전달특성을 분석하고, 설계 방법의 타당성 여부 검증을 위해 대칭적 유도성 아이리스 구조와 전계면 금속삽입 구조로 설계된 2개의 대역통과 필터를 자계면 T-접합에 의한 합성방법으로 Ka-밴드 위성 중계기용 듀플렉서를 설계, 제작하였다. 제작된 듀플렉서는 위성체에서 송
Keywords