US 12,445,165 B2
Radio-frequency circuit and communication apparatus
Hirotsugu Mori, Nagaokakyo (JP); and Satoshi Tanaka, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO. , LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jan. 23, 2023, as Appl. No. 18/157,845.
Application 18/157,845 is a continuation of application No. PCT/JP2021/025404, filed on Jul. 6, 2021.
Claims priority of application No. 2020-127774 (JP), filed on Jul. 28, 2020.
Prior Publication US 2023/0163803 A1, May 25, 2023
Int. Cl. H04B 1/54 (2006.01); H03H 7/01 (2006.01); H03H 9/54 (2006.01)
CPC H04B 1/54 (2013.01) [H03H 7/0115 (2013.01); H03H 9/54 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio-frequency circuit comprising:
a first filter having a pass band that corresponds to a first sub-band, at least part of the first sub-band being included in a first band of a time division duplex (TDD) communication system; and
a band elimination filter connected to the first filter and having a first elimination band that corresponds to a second sub-band included in the first band,
wherein the second sub-band is between a third sub-band and a fourth sub-band, the third sub-band and the fourth sub-band being included in the first band, and
wherein the first sub-band includes the second sub-band, the third sub-band, and the fourth sub-band.