| 摘要 |
PROBLEM TO BE SOLVED: To improve a coupling force of coupling electrodes of a laminated dielectric filter to miniaturize the filter and to widen its passband width. SOLUTION: A stripline resonator formed in a laminate 1 comprises first transmission lines 3 each having one end terminated to ground potential and the other end opened, second transmission lines 4 formed, facing the first lines 3, between dielectric layers different from dielectric layers between which the first lines 3 are formed, via hole conductors 6 connecting a part of the first lines 3 near to their open ends with a part of the second lines 4, and coupling electrodes 9 facing the first lines 3 of mutually adjacent striplines. The coupling electrodes 9 are coupling electrodes 7a, 7b disposed near the terminated end and the open and of the first lines 3 of the central stripline 9 so as to sandwich the via hole conductors 6 between the first and second lines 3, 4.
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