High-T_c Superconducting Planar Filter for Power Handling Capability (Special Issue on Toward Digital and Analog Applications of Superconductors)
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概要
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A high- T_c superconducting filter of the planar structure is proposed for handling higher power signals and for miniaturizing the filter configuration. The filter is designed with a single disk-resonator shared by two degenerate modes to operate as a two-stage bandpass filter. Thereby the proposed filter is expected to possess high power handling capability as a conventional filter with two resonator disks does while the filter configuration is about a half in area compared to the conventional one. The Tchebyscheff type filter with 5.l GHz center frequency and 2% relative bandwidth was fabricated using a high-T_c superconducting thin film. The passband insertion loss,L_0, was approximately 0.8 dB at 77 K. The low loss performance due to the superconductivity was observed at incident signal levels up to + 41.2 dBm (around 15 W) at 20 K, which is limited by the power devices in the measurement setup. In addition,good linearity in the filter responses was confirmed by observing the intermodulation distortion with the two-tone method, which indirectly shows a stable operation with higher power incident signals.
- 社団法人電子情報通信学会の論文
- 1996-09-25
著者
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SETSUNE Kentaro
Central Research Laboratories, Matsushita Electric Industrial Co., Ltd.
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Enokihara Akira
Central Research Laboratories Matsushita Electric Industrial Co. Ltd.
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Setsune Kentaro
Central Research Laboratories Matsushita Electric Industrial Co. Ltd.
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