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Title:
HIGH FREQUENCY CIRCUIT, HIGH FREQUENCY FRONT END CIRCUIT AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/102848
Kind Code:
A1
Abstract:
This high frequency circuit (20) is provided with: a filter (21) for Band A; a filter (22) for Band B; a filter (23) for Band C; a low-pass filter (11) which is connected between a common terminal (100) and a first terminal (110); a high-pass filter (12) which is connected between the common terminal (100) and a second terminal (120); and an impedance varying circuit (13). The frequency interval between the Band A and the Band B is smaller than the frequency interval between the Band A and the Band C; in CA of the Band A and the Band B, the filter (21) is connected to the first terminal (110), and the filter (22) is connected to the second terminal (120); and the impedance of the low-pass filter (11) viewed from the first terminal (110) and the impedance of the high-pass filter (12) viewed from the second terminal (120) are in a complex conjugate relation.

Inventors:
MORI, Hirotsugu (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2018/041271
Publication Date:
May 31, 2019
Filing Date:
November 07, 2018
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; H03H7/12; H03H7/46; H04B1/18; H04B1/52
Domestic Patent References:
WO2017138539A12017-08-17
Foreign References:
JP2014216711A2014-11-17
JP2014112769A2014-06-19
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (6F Tanaka Ito Pia Shin-Osaka Bldg., 3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
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