A Low-Loss SAW-TV-IF Filter With an Extended Impedance Matching Range

Jun Yamada, Yuuji Fujita, Takashi Shiba, Tatsuro Toyama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A new low-loss SAW filter for an intermediate frequency (IF) circuit in a color TV receiver has been developed. It consists of an apodized bidirectional and an unapodized group-type unidirectional transducer. The unidirectional transducer is designed to use different numbers of finger pairs in sending and reflecting electrodes for extension of the impedance matching range. A thin-film capacitor as a phase shifter is monolithically fabricated on a 128° Y – X LiNbO3;., substrate. As a consequence, both a low insertion loss of 11.3 dB and impedance matching without adjustment can be achieved at the same time without increasing the device chip size or number of electrical parts.

Original languageEnglish
Pages (from-to)668-672
Number of pages5
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume35
Issue number6
DOIs
Publication statusPublished - 1988 Nov

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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