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Title:
IMPEDANCE CONVERTER CIRCUIT, ANTENNA APPARATUS AND WIRELESS COMMUNICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2015/033632
Kind Code:
A1
Abstract:
Included are: an autotransformer circuit (25) that comprises a first inductor connected between a first port (P1) connected to a feeding unit side and a second port (P2) connected to an antenna side and that also comprises a second inductor connected between the second port (P2) and a third port (P3) connected to the ground; a first phase shifter (24) that has a first end connected to the first port (P1) of the autotransformer circuit (25); an inductor (23) that is series connected between a second end of the first phase shifter (24) and the feeding unit; and a capacitor (21) that is series connected to the inductor (23) and also series connected between the second end of the first phase shifter (24) and the feeding unit. Such arrangement achieves, in communication systems using discrete frequencies, respective matching states.

Inventors:
TESHIMA, Yuichiro (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
ISHIZUKA, Kenichi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2014/064908
Publication Date:
March 12, 2015
Filing Date:
June 05, 2014
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H01P5/08; H03H7/38; H04B1/04
Domestic Patent References:
WO2012165149A12012-12-06
WO2012147383A12012-11-01
Foreign References:
US20080218290A12008-09-11
JP2000512460A2000-09-19
JP2001507181A2001-05-29
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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