(74) Attorney, Agent, or Firm—NSIP Law Oct. 7, 2013 (KR)........................ 10-2013-01-19408
(57) ABSTRACT (51) Int. Cl. An acoustic filter includes a signal input port, a ladder-type …

A method of designing a microwave filter using a computerized filter optimizer, comprises
generating a filter circuit design in process (DIP) comprising a plurality of circuit elements …

A filter includes a series-arm resonator connected on a path connecting input/output
terminals, and first and second parallel-arm resonators that are connected between the …

Embodiments of resonator circuits and modulating resona tors and are described generally
herein. One or more acoustic wave resonators may be coupled in series or parallel to gen …

Related US Application Data filed on Dec. 10, 2010, provisional application No. 61/438.204,
filed on Jan. 31, 2011, provisional appli cation No. 61/497.819, filed on Jun. 16, 2011, provi …

A filter circuit includes a serial arm connected between ports (P1-P2), a parallel arm having
a resonator connected in series between ports (P1-P3), and another parallel arm having …

The present application is a continuation of US patent application Ser. No. 13/934,051, filed
Jul. 5, 2013, which claims the benefit under 35 USC S 119 to US provisional patent …

Methods for the design of microwave filters comprises comprising preferably the steps of
inputting a first set of filter requirements, inputting a selection of circuit element types …

In a ladder-type elastic wave filter, a resonance frequency of a second parallel resonator is
higher than that of a series resonator and lower than an antiresonance frequency of a series …

(57) ABSTRACT A method of designing an acoustic microwave filter in accor dance with
frequency response requirements. The method comprises selecting an initial filter circuit …