LOW LOSS SAW TV IF FILTER WITHOUT ADJUSTMENT FOR IMPEDANCE MATCHING.

Jun Yamada, Yuuji Fujita, Takashi Shiba, Tatsuro Toyama

Research output: Contribution to journalConference articlepeer-review

Abstract

The filter consists of an apodized bidirectional and an unapodized group-type unidirectional transducer. The unidirectional transducer is designed to take different finger pairs between sending and reflecting electrodes for extension of the impedance matching range. A thin-film capacitor monolithically fabricated on a 128 degree Y-X LiNbO//3 substrate is used as a phase shifter. Low insertion loss of 11. 3 dB with no adjustment for impedance matching can be achieved without increasing chip size and number of components.

Original languageEnglish
Pages (from-to)111-116
Number of pages6
JournalUltrasonics Symposium Proceedings
Publication statusPublished - 1987 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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