Saw element, saw device and branching filter

Details Saw element, saw device and branching filter Saw element, saw device and branching filter

2005-09-20

2005-09-20

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C333S189000, C333S190000

Reexamination Certificate

active

06946772

ABSTRACT:
An SAW element11comprises a first wiring section20formed between an input terminal18and an output terminal19, a plurality of first SAW resonators15which are located in serial to the first wiring section20, a plurality of second SAW resonators16which are located in serial to the first wiring section20at the side of the input terminal18or at the side of the output terminal19with respect to the first SAW resonators15, a plurality of second wiring section22which are formed between an intermediate point of the second SAW resonators16each other in the first wiring section20and a reference voltage electrode21, and a plurality of third SAW resonators17which are located in the second wiring section22, respectively, and which have anti-resonant frequencies corresponding with resonant frequencies of the second SAW resonators16.

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