Title:
デュプレクサ
Document Type and Number:
Japanese Patent JP6453912
Kind Code:
B2
Abstract:
A duplexer is disclosed. In an embodiment, the duplexer includes a Tx filter and an Rx filter, wherein the Tx filter includes first series-interconnected basic elements, each first basic element having a first electroacoustic resonator and first impedance converters interconnected in series between the first basic elements, wherein the Rx filter comprises second series-interconnected basic elements, each second basic element having a second electroacoustic resonator and second impedance converters interconnected in series between the second basic elements, wherein the first impedance converters in the Tx filter are impedance inverters, wherein the first resonators of the first basic elements in the Tx filter are only series resonators, wherein the second impedance converters in the Rx filter are admittance inverters, and wherein the second resonators of the second basic elements in the Rx filter are only parallel resonators.
Inventors:
Schmidhammer, Edgar
Application Number:
JP2016570304A
Publication Date:
January 16, 2019
Filing Date:
July 06, 2015
Export Citation:
Assignee:
EPCOS AG
International Classes:
H03H9/72; H03H7/12; H03H7/46; H03H9/17; H03H9/54; H03H9/64
Domestic Patent References:
| JP11346140A | ||||
| JP2005217852A | ||||
| JP2014502803A | ||||
| JP2013225945A | ||||
| JP2014013959A |
Foreign References:
| WO2006045176A1 | ||||
| WO2010027310A1 |
Attorney, Agent or Firm:
Koji Nagato