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Title:
HIGH-FREQUENCY FRONT-END CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/061974
Kind Code:
A1
Abstract:
The present invention suppresses multiple reflections of leakage signals. A high-frequency front-end circuit (10) is provided with a diplexer (20), a duplexer (31), and a low band-side multiple-reflection suppressing unit (50). The diplexer (20) is provided with an antenna connection terminal (PC20), a low band-side terminal (PS201), and a high band-side terminal (PS202), and separates a low-band communication signal and a high-band communication signal. The duplexer (31) separates a transmission signal and a reception signal of the low-band communication signal. The multiple-reflection suppressing unit (50) is disposed between the low band-side terminal (PS201) and the duplexer (31), and suppresses multiple reflections of leakage signals to the low-band side of the high-band communication signal.

Inventors:
NAGUMO Shoji (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
MOTOKI Kanta (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
MUROYA Yusaku (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2017/034083
Publication Date:
April 05, 2018
Filing Date:
September 21, 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:
H04B1/525; H03H7/38; H04B1/00
Domestic Patent References:
WO2016125619A12016-08-11
WO2015079940A12015-06-04
Foreign References:
JP2002043977A2002-02-08
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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