Title:
ANTENNA MATCHING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2007/055175
Kind Code:
A1
Abstract:
Disclosed is an antenna matching circuit (6) comprising a first variable capacitance
element (7) connected in series with an antenna element (1), a second variable
capacitance element (8) connect in parallel with the antenna element (1), a first
inductor (9) connected in series with the antenna element (1), and a second inductor
(10) connect in parallel with the antenna element (1). The antenna element (1)
comprises a series resistor (2) and a series capacitance element (3). A transmission
line (4) contains a load resistor (5). This antenna matching circuit is suitable
for a small-sized antenna which can be housed in a thin electronic device.
Inventors:
OKAZAKI MITSUNARI (JP)
Application Number:
PCT/JP2006/322106
Publication Date:
May 18, 2007
Filing Date:
November 06, 2006
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
OKAZAKI MITSUNARI (JP)
OKAZAKI MITSUNARI (JP)
International Classes:
H04B1/18; H01Q1/50; H03H7/38
Foreign References:
| JP2005311762A | 2005-11-04 | |||
| JPH06204803A | 1994-07-22 | |||
| JPH09232915A | 1997-09-05 | |||
| JPH08186512A | 1996-07-16 |
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (1-6-13 Kyobashi, Chuo-k, Tokyo 31, JP)
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