Title:
HIGH FREQUENCY FRONT-END CIRCUIT AND IMPEDANCE MATCHING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/056790
Kind Code:
A1
Abstract:
A high frequency front-end circuit (10) is provided with an antenna (101), a circulator (60), a signal transmission unit (45), and first and second variable matching circuits (20, 30). The first variable matching circuit (20) is connected between the antenna (101) and the signal transmission unit (45), and variably matches the impedance between the antenna (101) and the signal transmission unit (45). The second variable matching circuit (30) is connected between the circulator (60) and the signal transmission unit (45), variably matches the impedance between the signal transmission unit (45) and the circulator (60), and in a case where there is impedance which the first variable impedance circuit (20) could not match, matches such unmatched impedance.
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Inventors:
NAKAJIMA REIJI (JP)
Application Number:
PCT/JP2016/074574
Publication Date:
April 06, 2017
Filing Date:
August 24, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B1/40; H01Q1/50; H03H7/38
Domestic Patent References:
| WO2014061443A1 | 2014-04-24 | |||
| WO2007114126A1 | 2007-10-11 |
Foreign References:
| JPH0897733A | 1996-04-12 | |||
| JP2002300082A | 2002-10-11 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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