Band pass type of tunable filters composed of ultra wide band SAW resonators by adjusting capacitors connected SAW resonators

Michio Kadota, Yasuyuki Ida, Tetsuya Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Authors realized a one port surface acoustic wave (SAW) resonator composed of grooved-Cu- electrodes/4°Y-X· LiNbO 3 with an ultra wide bandwidth of 17 %. This time, the authors fabricated band pass type tunable filters using the SAW resonators instead of inductances and 2 kind of capacitors of interdigital capacitors (IDCs) and Si-diode variable capacitors. As a the result, when the IDCs were used, the tunable filter with the frequency tunable range of 6.8 % has been obtained by using 3 kinds of LiNbO 3 substrates having different capacitances of IDCs and the same designed SAW resonators. On the other hand, when the Si-diode variable capacitors were used, by applying the voltage of 1.2 V to 10 V to the Si variable capacitors (Toshiba JDV2S71E) in order to adjust the capacitance, a tunable filter with the frequency tunable range of 6.1% has been continuously obtained for the first time.

Original languageEnglish
Title of host publication2011 IEEE International Ultrasonics Symposium, IUS 2011
Pages559-562
Number of pages4
DOIs
Publication statusPublished - 2011 Dec 1
Event2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
Duration: 2011 Oct 182011 Oct 21

Other

Other2011 IEEE International Ultrasonics Symposium, IUS 2011
CountryUnited States
CityOrlando, FL
Period11/10/1811/10/21

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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