Title:
分波器及び弾性表面波フィルタ
Document Type and Number:
Japanese Patent JP4259576
Kind Code:
B2
Abstract:
A branching filter includes a first filter with a relatively low passband and having a first temperature property-improvement thin film, and a second filter with a relatively high passband and having a second temperature property-improvement thin film. In the branching filter, the thickness of the first temperature property-improvement thin film is different from that of the second temperature property-improvement thin film such that the temperature coefficient of frequency of the first filter is greater than that of the second filter.
Inventors:
Norio Taniguchi
Application Number:
JP2006515311A
Publication Date:
April 30, 2009
Filing Date:
February 23, 2005
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03H9/72; H01L41/09; H01L41/18; H03H9/145; H03H9/17; H03H9/25; H03H9/60; H03H9/64; H03H9/70
Domestic Patent References:
| JP2000341068A | ||||
| JP7212176A | ||||
| JP5183380A | ||||
| JP9167937A | ||||
| JP2003258602A | ||||
| JP58137317A |
Attorney, Agent or Firm:
Miyazaki saki main tax
Table of contents Makoto
Table of contents Makoto