Title:
VARIABLE FILTER CIRCUIT AND WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/119178
Kind Code:
A1
Abstract:
A variable filter circuit (10) comprising a serial arm (11) connected between ports (P1-P2), a parallel arm (12) including a resonator (Re_p1) connected in series between ports (P1-P3), and a parallel arm (13) including a resonator (Re_p2) connected in series between ports (P2-P3). The serial arm (11) includes an inductor (Ls1) connected between ports (P1-P2). The parallel arms (12, 13) include variable capacitance elements (Cs_p1, Cs_p2) connected in series to the resonators (Re_p1, Re_p2).
Inventors:
TANI MASAKAZU (JP)
SUGIYAMA SHOUZO (JP)
SUGIYAMA SHOUZO (JP)
Application Number:
PCT/JP2015/053171
Publication Date:
August 13, 2015
Filing Date:
February 05, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H7/075; H03H7/12; H03H9/54
Domestic Patent References:
| WO2012114930A1 | 2012-08-30 |
Foreign References:
| JP2004173245A | 2004-06-17 | |||
| JP2009130831A | 2009-06-11 | |||
| JP2004135322A | 2004-04-30 | |||
| JP2001069031A | 2001-03-16 | |||
| JP2013243570A | 2013-12-05 | |||
| JP2002290204A | 2002-10-04 | |||
| JP2009207116A | 2009-09-10 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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