Title:
A branching filter, a filter, and a communication module
Document Type and Number:
Japanese Patent JP6017868
Kind Code:
B2
Abstract:
A duplexer includes: a transmit filter that is connected between an antenna terminal and a transmit terminal and has a plurality of acoustic wave resonators; a receive filter that is connected between the antenna terminal and a receive terminal and has a plurality of acoustic wave resonators; and a delay line or a longitudinal coupling type resonator that is connected in parallel with at least one of the plurality of acoustic wave resonators of the transmit filter and the plurality of acoustic wave resonators of the receive filter and has at least two IDTs (Interdigital Transducers).
Inventors:
Jun Tsutsumi
Shogo Inoue
Iwaki Takashi
Shogo Inoue
Iwaki Takashi
Application Number:
JP2012158654A
Publication Date:
November 02, 2016
Filing Date:
July 17, 2012
Export Citation:
Assignee:
TAIYO YUDEN CO.,LTD.
International Classes:
H03H9/72; H03H9/145; H03H9/44; H03H9/64
Domestic Patent References:
| JP2003332885A | ||||
| JP62261211A | ||||
| JP2002330056A | ||||
| JP2009207116A | ||||
| JP9205342A |
Foreign References:
| WO2010073377A1 |
Attorney, Agent or Firm:
Shuhei Katayama