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Abstract In this paper, novel dual-band
bandpass filters (DBBPFs) are proposed
by using composite resonators, and their design
methods are developed based
on the lumped-elementequivalent circuits of the
filters. Four DBBPFs with
different specifications are designed, and t is
shown that both the midband
ifrequencies and the passband widths of the dual
bands of the filters can be
controlled separately. The filters are fabricated
and tested, and the measured
frequency responses agree favorably with
theoretical predictions, validating sufficiently
the proposed design theory and filter structures.
Keyword Bandpass filter, Dual-band, Composite
resonator, Microstrip line
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コンポジット共振器を用いたデュアルバンド帯域通過フィルタ
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