MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS

Title:

MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS

Document Type and Number:

WIPO Patent Application WO/2017/203919

Kind Code:

A9

Abstract:

A duplexer (1A) is provided with: a 90° hybrid (30) that is connected to an antenna terminal (110); a 90° hybrid (40) that is connected to a terminating resistor (70); a transmission side filter (10A) that is connected to the 90° hybrid (30); and notch filters (50A and 50B) that have similar filter characteristics and that are connected to both the 90° hybrids (30 and 40), wherein each of the notch filters (50A and 50B) is a band elimination filter that reflects the high-frequency signal of a transmission band and allows high-frequency signals outside the transmission band to pass.

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Inventors:

MIZOGUCHI SHINYA (JP)
HIGASHIDE MASANORI (JP)

Application Number:

PCT/JP2017/016275

Publication Date:

January 11, 2018

Filing Date:

April 25, 2017

Export Citation:

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Assignee:

MURATA MANUFACTURING CO (JP)

International Classes:

H04B1/525; H01P1/20; H01P1/213; H01P5/22; H01P7/10; H03H7/46

Attorney, Agent or Firm:

YOSHIKAWA, Shuichi et al. (JP)

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