Title:
ラダー型薄膜バルク音響波フィルタ
Document Type and Number:
Japanese Patent JP4719683
Kind Code:
B2
Abstract:
A ladder filter comprising a plurality of bulk acoustic wave resonators, the resonators comprising a plurality of series resonators series resonators in series between an input terminal and an output terminal of the filter, and one or more shunt resonators each connected between a junction between two series resonators and a common terminal, the series resonators comprising an input series resonator connected to the input terminal and an output series resonator connected to the output terminal, and wherein the shunt resonators are designed to satisfy: a unity aspect ratio and wherein the series resonators are designed to satisfy an aspect ratio different from unity. The aspect ratio is defined as the ratio of length to width of the resonator.
Inventors:
Milson Robert Frederick
Ruble Hans Peter
Ruble Hans Peter
Application Number:
JP2006530915A
Publication Date:
July 06, 2011
Filing Date:
September 24, 2004
Export Citation:
Assignee:
NXP B.V.
International Classes:
H03H9/54; H03H9/17; H03H9/56
Domestic Patent References:
| JP2003536341A | ||||
| JP2003283292A | ||||
| JP2003023337A | ||||
| JP2001024476A | ||||
| JP2003204239A |
Attorney, Agent or Firm:
Kenji Sugimura
Tatsuya Sawada
Tatsuya Sawada