Acoustic wave filter and radio frequency module

Abstract

An acoustic wave filter includes a piezoelectric substrate, series-arm resonators disposed at the piezoelectric substrate, an external connection terminal disposed at the piezoelectric substrate and connected to an antenna connection terminal, an external connection terminal disposed at the piezoelectric substrate and connected to an amplifier, a wire disposed at the piezoelectric substrate and electrically connecting the external connection terminal to the series-arm resonator, a wire disposed at the piezoelectric substrate and electrically connecting the external connection terminal to the series-arm resonator, and a shield that covers a part of a side surface of the piezoelectric substrate, wherein the shield covers at least a part of an area of the side surface of the piezoelectric substrate opposing the wire without covering an area of the side surface of the piezoelectric substrate opposing the wire.

Dependencies are inferred from the claim text.