Title:
弾性表面波フィルタ
Document Type and Number:
Japanese Patent JP4251409
Kind Code:
B2
Abstract:
A surface acoustic wave filter constituted by cascading a first electrode structure line including an input/output IDT, two receiving IDTs outside the input/output IDT and two reflectors outside the two receiving IDTs, and a second electrode structure line including an input/output IDT, two receiving IDTs outside the input/output IDT and two reflectors outside the two receiving IDTs. When the surface acoustic wave filter is expressed by an electrically equivalent, symmetrical lattice circuit expressed by a series arm impedance and a parallel arm impedance, a pass band is formed by using at least two resonances of the series arm impedance and at least three resonances of the parallel arm impedance. Thus a surface acoustic wave filter having low supuriousness and a board band is realized.
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Inventors:
Masashi Omura
Long-cherished hope
Hidenori Abe
Long-cherished hope
Hidenori Abe
Application Number:
JP52278496A
Publication Date:
April 08, 2009
Filing Date:
March 15, 1996
Export Citation:
Assignee:
Kyocera Kinseki Co., Ltd.
International Classes:
H03H9/64; H03H9/00
Domestic Patent References:
| JP5267990A | ||||
| JP7050543A | ||||
| JP3034715A | ||||
| JP64082706A | ||||
| JP4278707A | ||||
| JP5110371A | ||||
| JP2202710A |
Attorney, Agent or Firm:
Yoshito Kitano