| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a filter for downsizing an apparatus by multilayering. SOLUTION: An interdigital filter is constituted so that a plurality of resonators for folding line resonators, respectively, are arranged in parallel on a dielectric substrate of a strip line construction or a microstrip line construction, wherein broadside joint structures 1U and 1L having a plurality of conductors where both ends of the plurality of resonators are arranged on different surfaces across the dielectric bodies are formed, and edge joint structures 2 with a plurality of conductors where the other is arranged on the same plane is formed. In comparison with the case that all are edge joint structures, the thickness of the dielectric substrate can be reduced to one-third so as to laminate a plurality of filters. COPYRIGHT: (C)2006,JPO&NCIPI
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