Title:
ANTENNA MATCHING CIRCUIT, ANTENNA CIRCUIT, FRONT END CIRCUIT AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/022370
Kind Code:
A1
Abstract:
This antenna matching circuit is provided with: a first circuit (11) that is connected between a feed port (Pf) and an antenna port (Pa); and a second circuit (12) that is connected between the feed port (Pf) and the ground or between the antenna port (Pa) and the ground. The first circuit (11) is, for example, a circuit wherein a first variable capacitance element (C1) and a first inductor (L1) are connected in series; and the second circuit (12) is, for example, a circuit wherein a second variable capacitance element (C2) and a second inductor (L2) are connected in parallel. A switch (13) at least makes a switch between a first state wherein a second end (P22) of the second circuit (12) and a first end (P11) of the first circuit (11) are connected and a second state wherein the second end (P22) of the second circuit (12) and a second end (P12) of the first circuit (11) are connected.
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Inventors:
KURODA KATSUHITO (JP)
ONAKA KENGO (JP)
ONAKA KENGO (JP)
Application Number:
PCT/JP2016/069216
Publication Date:
February 09, 2017
Filing Date:
June 29, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H7/38; H01Q5/335; H04B1/04; H04B1/18
Domestic Patent References:
| WO2001048934A1 | 2001-07-05 |
Foreign References:
| JPH08125480A | 1996-05-17 | |||
| US20110227666A1 | 2011-09-22 | |||
| JP2007174034A | 2007-07-05 | |||
| JP2004304435A | 2004-10-28 | |||
| JP2008527808A | 2008-07-24 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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