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Patent Searching and Data


Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/176551
Kind Code:
A1
Abstract:
This antenna device (101) is provided with: an antenna element (1); a switch (2) in which a common terminal is connected on the side of the antenna element (1); a first signal path (Path1) provided between a first communication circuit (RFIC10) and a first input/output terminal (S1) of the switch (2); and a second signal path (Path2) provided between a second communication circuit (RFIC11) and a second input/output terminal (S2) of the switch (2). The first signal path (Path1) is provided with a high-frequency circuit (a power amp module 3) and a phase shifter (4). In the high-frequency circuit, the impedance in a second frequency band as viewed from the antenna element (1) is an open circuit or short circuit. In a state in which the first input/output terminal (S1) and the second input/output terminal (S2) are both connected to the common terminal (COM), the phase shifter (4) phase-shifts the impedance in the second frequency band so that the impedance is an open circuit when the first signal path (Path1) is viewed from the common terminal (COM).

Inventors:
KOBAYASHI Hideaki (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:
JP2019/007730
Publication Date:
September 19, 2019
Filing Date:
February 28, 2019
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H04B1/00; H04B1/40; H04B15/00
Domestic Patent References:
WO2018016340A12018-01-25
WO2016152603A12016-09-29
Foreign References:
JP2014017750A2014-01-30
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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