| 摘要 |
<p>Even when a difference between the series resonance frequency and the parallel resonance frequency of each resonator cannot be made large, the passing band will be rendered capable of being widened without causing any ripple in the passing band. <??>One of each of the first resonator (5) and the first inductance element (7) is connected to each other in series, and is inserted between the first input end (1) and the first output end (2) while the other of each of the first resonator (5) and the first inductance element (7) is connected to each other in series, and is inserted between the second input end (3) and the second output end (4); and one of each of the second resonator (6) and the second inductance element (8) is connected to each other in series and is inserted between the first input end (1) and the second output end (4) while the other of each of the second resonator (6) and the second inductance element (8) is connected to each other in series and is inserted between the second input end (3) and the first output end (2), whereby the parallel resonance frequency of the second resonator (6) is caused to substantially coincide with the series resonance frequency based on the first resonator (5) and the first inductance (7). <IMAGE></p> |
