US Patent Application 18231918. ACOUSTIC WAVE FILTER simplified abstract

ACOUSTIC WAVE FILTER

Organization Name

Murata Manufacturing Co., Ltd.

Inventor(s)

Akira Noguchi of Nagaokakyo-shi (JP)

ACOUSTIC WAVE FILTER - A simplified explanation of the abstract

This abstract first appeared for US patent application 18231918 titled 'ACOUSTIC WAVE FILTER

Simplified Explanation

The patent application describes an acoustic wave filter that includes a filter circuit and a canceling circuit.

• The filter circuit is connected to input-and-output terminals and includes series-arm resonators and parallel-arm resonators.
• The canceling circuit is connected in parallel to a portion of the first path and includes acoustic wave resonators.
• The acoustic wave resonators in the canceling circuit are connected to the ground.
• The anti-resonant frequency of at least one of the acoustic wave resonators in the canceling circuit is within the pass band of the filter circuit.

Original Abstract Submitted

An acoustic wave filter includes a filter circuit connected to input-and-output terminals, and a canceling circuit connected in parallel to at least a portion of a first path connecting the input-and-output terminals. The filter circuit includes one or more series-arm resonators on the first path, and one or more parallel-arm resonators between the first path and a ground. The canceling circuit includes acoustic wave resonators in parallel or substantially in parallel in a propagation direction of an acoustic wave. At least one of the acoustic wave resonators is connected to the ground, and an anti-resonant frequency of the at least one of the acoustic wave resonators is in a pass band of the filter circuit.