Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FILTER DEVICE, HIGH FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/105193
Kind Code:
A1
Abstract:
A filter (11) is provided with: a first resonance circuit (110) having at least one first resonance frequency and a second resonance circuit (120) having at least one second resonance frequency different from the first resonance frequency; and switches (SW11, SW12) connected to the first resonance circuit (110) and the second resonance circuit(120), respectively, wherein the switches (SW11, SW12) perform switching between a first state where a high frequency signal having the first resonance frequency is sent from an IN terminal (101) to an OUT terminal (102) via the first resonance circuit (110) and a high frequency signal having the second resonance frequency is sent from the IN terminal (101) to the ground via the second resonance circuit (120), and a second state where a high frequency signal having the first resonance frequency is sent from the IN terminal (101) to the ground via the first resonance circuit (110) and a high frequency signal having the second resonance frequency is sent from the IN terminal (101) to the OUT terminal (102) via the second resonance circuit (120).

Inventors:
MORI, Hirotsugu (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
NOSAKA, Koji (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2017/033271
Publication Date:
June 14, 2018
Filing Date:
September 14, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H03H9/64; H03H7/01; H04B1/50
Domestic Patent References:
WO2016158953A12016-10-06
WO2013080428A12013-06-06
Foreign References:
US5317290A1994-05-31
JP2005508117A2005-03-24
JP2009207116A2009-09-10
JP2000323961A2000-11-24
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)
Download PDF: