Design of Microstrip Ferrite-Coupled Line Devices Using Perturbation Theory
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概要
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Ferrite perturbation theory is applied to analyze a ferrite-coupled microstrip line (FCL) with longitudinal magnetization. The properties of an FCL structure with a given finite length are discussed. Optimal conditions for the waveguide cross section and the length are derived. Using the results of the perturbation analysis, a circulator and an isolator based on the microstrip line FCL are designed, fabricated, and measured. Agreement between measured and calculated $S$ parameters is obtained. The devices show an insertion loss of 2–3 dB within the frequency range of 6–10 GHz.
- 2006-04-15
著者
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Feng Wei
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
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Wu Hong-cai
School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
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Cao Meng
School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
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Pietig Rainer
Philips Research Laboratories, Weisshausstrasse 2, Aachen 52066, Germany
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Feng Wei
School of Materials Science and Engineering, Tianjin University, 300072 Tianjin, P. R. China
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