Filter element, and filter device, duplexer, and...

Details Filter element, and filter device, duplexer, and... Filter element, and filter device, duplexer, and...

2007-09-18

2007-09-18

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S189000

Reexamination Certificate

active

10717487

ABSTRACT:
A filter element includes resonators that are arranged in series arms and parallel arms in a circuit. In this filter element, at least one of the series-arm resonators includes a plurality of single-terminal pair piezoelectric thin-film resonators connected in parallel.

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