| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter that broadens a passband without being subject to restriction in respect of manufacture. SOLUTION: The filter is equipped with: a dielectric substrate 1 having a grounding conductors 2a, 2b on both surfaces in a thickness direction; a plurality of conductor pieces 3 that are disposed in parallel with the grounding conductors 2a, 2b and coupled with each other in electromagnetic coupling manner; a power feeding section 4 formed on a conductor piece 31; an output section 5 formed on a conductor piece 36; and grounding through-holes 6 formed in ends of the conductor pieces, of ends of the conductor pieces 3, opposed to each other in pieces adjacent in the juxtapositional direction in an orthogonal direction relative to the juxtapositional direction of the conductor pieces 3, which connects the conductor pieces 3 to the grounding conductors 2a, 2b. The conductor pieces 3 are disposed on two planes having different positions in a thickness direction within the dielectric substrate 1 and being parallel with the grounding conductors 2a, 2b. The planes on which the conductor pieces 3 are disposed are planes adjacent in a thickness direction with respect to the planes on which the conductor pieces adjacent in the juxtapositional direction are formed. COPYRIGHT: (C)2010,JPO&INPIT
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