Wideband SAW filters using cascaded unidirectional transducers

Takashi Shiba, Yuji Fujita, Seima Kondo, Junchi Hamasaki, Mayumi Ide, Seiichi Ogawa, Koji Oda

Research output: Contribution to journalConference articlepeer-review


An improved cascaded UDT structure has been proposed to achieve wideband performances. In order to confirm the prediction, simulations and experiments are applied. We select the equivalent circuit model and circuit composition procedure as a simulation technique. The predictions are verified by the simulations and the experiments. It is no restriction for bandwidth of cascaded transfer function according to the simulation results. The structure is applied to a wideband RF filter which consists of IDTs for the purpose of monitoring. Two times wider bandwidth of the filter than the conventional one is obtained and the transfer functions for forward, backward and through transducer is found to be unidirectivity.

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalProceedings of the IEEE Ultrasonics Symposium
Publication statusPublished - 2001 Dec 1
Externally publishedYes
Event2001 Ultrasonics Symposium - Atlanta, GA, United States
Duration: 2001 Oct 62001 Oct 10

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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