TY - GEN
T1 - Wideband ladder filters fully covering digital TV band based on shear horizontal plate wave
AU - Kadota, Michio
AU - Tanaka, Shuji
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/6/29
Y1 - 2015/6/29
N2 - 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.
AB - 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.
KW - SH plate wave
KW - cognitive radio
KW - digital TV
KW - thin LiNbO plate
KW - ultra-wideband ladder filter
UR - http://www.scopus.com/inward/record.url?scp=84943328796&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84943328796&partnerID=8YFLogxK
U2 - 10.1109/FCS.2015.7138869
DO - 10.1109/FCS.2015.7138869
M3 - Conference contribution
AN - SCOPUS:84943328796
T3 - 2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings
SP - 412
EP - 415
BT - 2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015
Y2 - 12 April 2015 through 16 April 2015
ER -