Patent ID: 8004370
Filing Date: 2011-08-23
Classification: H03H

Abstract:
1. A surface acoustic wave element comprising: a piezoelectric substrate; a first filter on the piezoelectric substrate; an input electrode configured for inputting a signal in the first filter; an output electrode configured for outputting a signal from the first filter; and a ground electrode to which a ground potential is applied, wherein the first filter comprises at least one serial arm that comprises at least one resonator; a first serial arm that is closest to the input electrode comprises a first serial arm portion and a second serial arm portion that are connected in parallel with each other; each of the first serial arm portion and the second serial arm portion comprises at least one resonator; and either the input electrode or the ground electrode is laced between the first serial arm portion and the second serial arm portion; wherein when the ground electrode is placed between the first serial arm portion and the second serial arm portion, the ground electrode is connected to a parallel resonator of the first filter on the piezoelectric substrate.