| 摘要 |
PROBLEM TO BE SOLVED: To obtain a simple high-performance band-pass filter which has attenuation poles formed without using any negative coupling coefficient between resonators and performs even delay equalization. SOLUTION: In the band-pass filter composed of a plurality of resonators which are coupled to one another, all of the plurality of resonators have the same shape, where a resonator group of six resonators 115 to 120 in total which are arrayed in two rows by three columns is included as the component of the plurality of resonators, the respective resonators included in the resonator group being coupled to the resonators in all adjacent rows and columns with coupling coefficients of the same polarity, and the resonators other than the resonator group are also coupled to the resonator group with coupling coefficients of the same polarity. COPYRIGHT: (C)2008,JPO&INPIT
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