Search International and National Patent Collections

1. (WO2018203521) DUAL-BAND RESONATOR AND DUAL-BAND BANDPASS FILTER USING SAME

Pub. No.:    WO/2018/203521    International Application No.:    PCT/JP2018/017180
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Sat Apr 28 01:59:59 CEST 2018
IPC: H01P 7/08
H01P 1/203
Applicants: TOKYO KEIKI INC.
東京計器株式会社
THE JAPAN STEEL WORKS, LTD.
株式会社日本製鋼所
UNIVERSITY OF YAMANASHI
国立大学法人山梨大学
Inventors: SEKIYA Naoto
關谷 尚人
UNNO Takahiro
海野 雄丈
TSURUOKA Tsutomu
鶴岡 勉
KISHIDA Kazuhito
岸田 和人
SATO Yasuo
佐藤 庸夫
KITADA Noritaka
北田 典敬
Title: DUAL-BAND RESONATOR AND DUAL-BAND BANDPASS FILTER USING SAME
Abstract:
Provided is a dual-band resonator which can be downsized further than conventional ones. A dual-band resonator 10 is provided with a first conductor 20 and a second conductor 30. The first conductor 20 is configured to be folded at a first folding part 21 at the center so that both extensions are in a prescribed direction and adjacent to one another with a prescribed space therebetween, wherein a conductor part 26 closer to one end 28 side than the first folding part 21 and a conductor part 27 closer to the other end 29 side than the first folding part 21 are further folded at second folding parts 22 between the one end 28 and the first folding part 21 and between the other end 29 and the first folding part 21, respectively, in a direction in which the one end 28 and the other end 29 are apart from each other. The second conductor 30 extends in a prescribed direction contiguously to the first folding part 21 of the first conductor 20. The first conductor 20 constitutes a half-wavelength resonator, and odd-mode resonance occurs in the first conductor 20. The first conductor 20 and the second conductor 30 constitute a half-wavelength resonator, and even-mode resonance occurs in the first conductor 20 and the second conductor 30.