Receiving filter circuit and duplexer having the same
AssigneeWisol Co., Ltd.
InventorsBong Gi KIM, Kensei UEHARA, Ju Hyeong LEE, Takahiro SATO
Life of this patent
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Abstract
A receiving filter circuit includes: a double mode surface acoustic wave (DMS) filter placed on a piezoelectric substrate and having a first reflector and a plurality of comb-shaped electrodes located adjacent to the first reflector; and a surface acoustic wave (SAW) resonator placed on the piezoelectric substrate in such a manner as to be laid on at least a portion of a transmission path of a surface acoustic wave generated from the DMS filter and having a second reflector located on a position with a distance of zero from the first reflector and a plurality of comb-shaped electrodes located adjacent to the second reflector.
Claims5
A receiving filter circuit comprising:
- a double mode surface acoustic wave (DMS) filter placed on a piezoelectric substrate and having a first reflector and a plurality of comb-shaped electrodes located adjacent to the first reflector;
- and
- a surface acoustic wave (SAW) resonator placed on the piezoelectric substrate in such a manner as to be laid on at least a portion of a transmission path of a surface acoustic wave generated from the DMS filter and having a second reflector located on a position with a distance of zero from the first reflector and a plurality of comb-shaped electrodes located adjacent to the second reflector.
Dependencies are inferred from the claim text.