BAND-PASS FILTER CIRCUIT AND MULTIPLEXER

WIPO Patent Application WO/2021/227347

A1

A band-pass filter circuit and a multiplexer. The band-pass filter circuit comprises at least one electromagnetic LC filter circuit (00) and at least one sound wave resonance unit (10). The sound wave resonance unit (10) comprises an input port (11), an output port (12), at least one circuit component (20) and at least three resonators (131, 132). The electromagnetic LC filter circuit (00) is electrically connected to the sound wave resonance unit (10). The at least three resonators (131, 132) comprise at least one first resonator (131) and at least one second resonator (132). When the at least one first resonator (131) comprises one first resonator (131), the first resonator (131) is connected in series between the input port (11) and the output port (12). When the at least one first resonator (131) comprises multiple first resonators (131), the multiple first resonators (131) in series connection are connected in series between the input port (11) and the output port (12). The second resonator (132) is connected to an end of the first resonator (131). The circuit component (20) is connected between the input port (11) and the output port (12), wherein the circuit component (20) comprises an inductor structure or a capacitor structure.

HE CHENGGONG (CN)
WANG XIAODONG (CN)
ZUO CHENGJIE (CN)
HE JUN (CN)

PCT/CN2020/120190

November 18, 2021

October 10, 2020

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ANHUI ANUKI TECH CO LTD (CN)

H03H9/64; H03H9/72

CN107342749A	2017-11-10
CN111490749A	2020-08-04
CN210201796U	2020-03-27
CN102763329A	2012-10-31
JP2003283363A	2003-10-03

BEYOND ATTORNEYS AT LAW (CN)

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