Miniaturized High-Temperature Superconductor Bandpass Filters Using Microstrip S-Type Spiral Resonators(<Special Section>Recent Trends of Microwave and Millimeter-Wave Passive Circuit Components and Technologies for Improvement of Characteristics)
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概要
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copyright(c)2005 IEICE許諾番号：07RB0174 http://www.ieice.org/jpn/trans_online/index.htmlAt frequencies currently used by mobile communications, many of the microstrip half-wavelength resonators are too large to realize miniaturized filters. For this reason, very small-sized microstrip spiral resonators and filters, using high-temperature superconductors (HTS), have been studied recently. In this paper, the resonant and coupling characteristics of microstrip G-type and S-type spiral resonators are investigated first by using an electromagnetic simulator. Then small-sized 4-pole, 8-pole, and 16-pole Chebyshev bandpass filters using S-type spirals are designed, respectively, with a midband frequency f_0=1.93 GHz. The frequency responses of the filters satisfy well the desired specifications, and the measured frequency response of the 8-pole HTS filter agrees well with the theoretical prediction.
- 社団法人電子情報通信学会の論文
- 2005-01-01
著者
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Kobayashi Yoshio
Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University
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Kobayashi Y
The Department Of Electrical And Electronic Systems Saitama University
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Ma Zhewang
Department Of Electrical And Electronic Systems Saitama University
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Kawaguchi Tamio
The Department Of Electrical And Electronic Systems Saitama University
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KAWAGUCHI Tamio
Department of Electrical and Electronic Systems, Saitama University
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小林 禧夫
Department of Electrical and Electronic Systems, Saitama University
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馬 哲旺
Department of Electrical and Electronic Systems, Saitama University
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Kobayashi Yoshio
Department Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine
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