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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/176551
Kind Code:
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).

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:
Publication Date:
September 19, 2019
Filing Date:
February 28, 2019
Export Citation:
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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:
Foreign References:
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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