Ultra-wideband SAW resonator composed of grooved Cu electrodes and its application to tunable filters

Michio Kadota, Tetsuya Kimura, Yasuyuki Ida

Research output: Contribution to journalArticlepeer-review

Abstract

A cognitive radio system, which is being investigated in order to use limited frequency resources effectively, requires a tunable filter with a wide variable frequency range. A wideband resonator is required to realize a tunable filter. It was reported that a resonator composed of a Cu electrode/15° YX-LiNbO3 had a large bandwidth of 12%. We attempted to fabricate a one-port resonator composed of a grooved Cu electrode/4° YX-LiNbO 3. This resonator was applied to a tunable filter, and a tunable filter having a tunable range of 6.8% in the center frequency was experimentally realized using a bandpass-type filter circuit, and one having a tunable range of 9 to 12% was theoretically realized using a ladder-type filter circuit.

Original languageEnglish
Pages (from-to)32-40
Number of pages9
JournalElectronics and Communications in Japan
Volume96
Issue number2
DOIs
Publication statusPublished - 2013 Feb 1

Keywords

  • LiNbO
  • grooved Cu electrode
  • tunable filter.
  • ultra-wideband resonator

ASJC Scopus subject areas

  • Signal Processing
  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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