| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bandpass filter that suppresses an impedance mismatch without requiring any special elements. <P>SOLUTION: The bandpass filter includes: an input terminal T1; an output terminal T2; LC parallel resonators LC2, LC3, LC4 having one end grounded and arranged between the input terminal T1 and the output terminal T2; and trap resonators LC1, LC5 arranged between the LC parallel resonators LC2, LC3, LC4 and the input terminal or output terminal and disposed for electromagnetic coupling with the LC parallel resonators LC2, LC4. <P>COPYRIGHT: (C)2013,JPO&INPIT |
