US Patent Application 18210136. FILTER DEVICE, RADIO-FREQUENCY MODULE, AND COMMUNICATION DEVICE simplified abstract

FILTER DEVICE, RADIO-FREQUENCY MODULE, AND COMMUNICATION DEVICE

Organization Name

Murata Manufacturing Co., Ltd.

Inventor(s)

Masanori Kato of Nagaokakyo-shi (JP)

FILTER DEVICE, RADIO-FREQUENCY MODULE, AND COMMUNICATION DEVICE - A simplified explanation of the abstract

• This abstract for appeared for US patent application number 18210136 Titled 'FILTER DEVICE, RADIO-FREQUENCY MODULE, AND COMMUNICATION DEVICE'

Simplified Explanation

The abstract describes a filter device that consists of a filter substrate and a ladder filter. The ladder filter includes components called inductors and acoustic wave resonators, which are used to filter out specific frequencies. The inductors are connected to the acoustic wave resonators. The ladder filter has a wider range of frequencies that it can allow to pass through compared to the resonance range of the acoustic wave resonators. The series arm resonator is made from a material called piezoelectric substrate, while the parallel arm resonator is made from a different type of piezoelectric substrate.

Original Abstract Submitted

A filter device includes a filter substrate and a ladder filter at the filter substrate. The ladder filter includes at least one inductor and acoustic wave resonators including a series arm resonator and a parallel arm resonator. The at least one inductor is coupled to the acoustic wave resonators. A pass bandwidth of the ladder filter is larger than a resonance bandwidth of at least one of the acoustic wave resonators. The series arm resonator includes a first piezoelectric substrate. The parallel arm resonator includes a second piezoelectric substrate that is different from the first piezoelectric substrate.