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Title:
ANTENNA DEVICE AND ELECTRONIC INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/2018/101284
Kind Code:
A1
Abstract:
An antenna device (101) is provided with a radiating element (10), a coupling circuit (30), and a nonradiative resonance circuit (20). The coupling circuit (30) has a first coupling element (31) connected between a power feeding circuit (1) and the radiating element (10), and a second coupling element (32) coupled to said first coupling element (31). One end of the second coupling element (32) is grounded, and the nonradiative resonance circuit (20) is connected to the other end. The frequency characteristics of the reflection loss of the radiating element (10) seen from the power feeding circuit (1) are adjusted by the resonance frequency characteristics of the nonradiative resonance circuit (20). This configuration eliminates the problem of interference relating to radiation of two radiating elements.

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Inventors:
MIKAWA Kentaro (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
ISHIZUKA Kenichi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
NASU Takafumi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2017/042706
Publication Date:
June 07, 2018
Filing Date:
November 29, 2017
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H01Q1/24; H01Q5/335; H03H7/38
Domestic Patent References:
WO2016143724A12016-09-15
WO2016186091A12016-11-24
WO2015178204A12015-11-26
WO2016152603A12016-09-29
WO2014155873A12014-10-02
WO2016114182A12016-07-21
Foreign References:
JPS54183246U1979-12-26
JPS427857Y2
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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