Bandpass filter and radar device
AssigneeFuruno Electric Co., Ltd.
InventorsTakuya Yamaguchi, Keisuke Tanaka
Life of this patent
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Abstract
A bandpass filter (includes a dielectric substrate, a first strip line formed on the dielectric substrate, resonators coupled to the first strip line, and a second strip line formed on the dielectric substrate coupled to the resonators. The resonators include a plurality of inductor elements formed on the dielectric substrate and composed of rectangular conductors having a long side direction and a short side direction, and a capacitor element for coupling the plurality of inductor elements and include a series resonance circuit composed of the plurality of inductor elements and the capacitor element. The length in the long side direction of the inductor element is less than half wavelength of the electromagnetic wave transmitted by the filter.
Claims12
A bandpass filter, comprising:
- a first strip line configured to transmit electromagnetic wave, the first strip line being formed on a dielectric substrate;
- a resonator configured to comprise a first series resonance circuit coupled to the first strip line, the resonator being formed on the dielectric substrate;
- and
- a second strip line configured to couple to the resonator, the second strip line being formed on the dielectric substrate,
- wherein the first series resonance circuit comprises:
- a plurality of inductor elements each configured to comprise a rectangular conductor having a length in a long side direction equal to or less than a half wavelength of the electromagnetic wave;
- and
- a mount type capacitor element placed between the plurality of inductor elements and coupled in series to the plurality of inductor elements.
Dependencies are inferred from the claim text.