Wideband ladder filters fully covering digital TV band based on shear horizontal plate wave

Michio Kadota, Shuji Tanaka

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

5 Citations (Scopus)

Abstract

A cognitive radio terminal using vacant frequency bands of digital TV channels, i.e. TV white space, strongly requires a compact tunable filter covering a wide frequency range of the digital TV band. The authors proposed a new bandwidth- and frequency-tunable filter combining an ultra-wideband ladder filter and tunable band rejection filters. T-type and ρ-type ladder filters composed of ultra-wideband 0th shear horizontal mode (SH0) plate wave resonators were fabricated on a submicron thick LiNbO3 plate supported by a Si substrate. The wavelength ratio of the parallel/series resonators in the ladder filters was changed as a design parameter. As a result, ultra-large 6 dB bandwidths of 41 to 51%, which fully cover the digital TV band, were measured. The lowest peak insertion loss was low as 0.8 dB. The ultra-wideband ladder filter is useful for the above-mentioned new tunable filter for digital TV cognitive radio communication.

Original languageEnglish
Title of host publication2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages412-415
Number of pages4
ISBN (Electronic)9781479988662
DOIs
Publication statusPublished - 2015 Jun 29
Event2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Denver, United States
Duration: 2015 Apr 122015 Apr 16

Publication series

Name2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings

Other

Other2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015
CountryUnited States
CityDenver
Period15/4/1215/4/16

Keywords

  • SH plate wave
  • cognitive radio
  • digital TV
  • thin LiNbO plate
  • ultra-wideband ladder filter

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

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