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Design and Fabrication of Diplexer for Dual-band GSM/DCS Application using High-Q Multilayer Inductors  

심성훈 (한국과학기술연구원 박막재료연구센터, 연세대학교 전기전자공학과)
강종윤 (한국과학기술연구원 박막재료연구센타)
최지원 (한국과학기술연구원 박막재료연구센타)
윤영중 (연세대학교 전기전자공학과)
윤석진 (한국과학기술연구원 박막재료연구센타)
김현재 (한국과학기술연구원 박막재료연구센타)
Publication Information
Abstract
In this paper, the modeling and design of high-Q multilayer passives have been investigated, and multilayer diplexer for GSM/DCS applications has been designed and fabricated using the passives. Modeling of a multilayer inductor was performed by the subsystems of distributed components, and using the modeling the optimal structures of the high-Q multilayer inductor could be designed by analyzing parasitics and couplings which affect their frequency characteristics. Multilayer diplexers for GSM/DCS applications have been designed and fabricated using LTCC technology. LPF for GSM band had the passband insertion loss of less than 0.55 dB, the return loss of more than 12 dB, and the isolation level of more than 26 dB. HPF for DCS band had the passband insertion loss of less than 0.82 dB, the return loss of more than 11 dB, and the isolation level of more than 38 dB.
Keywords
LTCC; Diplexer; High-Q Inductor; Multilayer;
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