TY - GEN
T1 - High frequency resonators with wide bandwidth using SH0 mode plate wave in thin LiNbO3
AU - Kadota, Michio
AU - Esashi, Masayoshi
AU - Tanaka, Shuji
AU - Kuratani, Yasuhiro
AU - Kimura, Tetsuya
PY - 2013
Y1 - 2013
N2 - Currently, an ultrawide band resonator used for a tunable filter with a wide tunable range is strongly required, because a mobile phone with multi-bands and a cognitive radio system require such a tunable filter to simplify their wirelss front-end circuits. The authors developed resonators with ultrawide bandwidths of 26% to 29% and large impedance ratios of 92 to 98 dB between resonance (fr) and anti-resonance frequencies (a) using a 0-th shear horizontal (SH0) mode plate wave in a 28-30°YX-LiNbO3 plate. However, the resonators were of low frequency as r = 1.8 MHz and a = 2.3 MHz and suffer from ripples due to transverse mode between r and a. In this study, high frequency SH 0 mode plate wave resonators (r = 440 ∼ 560 MHz) with a wide bandwidth and a large impedance ratio and without ripples have been fabricated using an ultrathin LiNbO3 plate and an apodized interdigital transducer.
AB - Currently, an ultrawide band resonator used for a tunable filter with a wide tunable range is strongly required, because a mobile phone with multi-bands and a cognitive radio system require such a tunable filter to simplify their wirelss front-end circuits. The authors developed resonators with ultrawide bandwidths of 26% to 29% and large impedance ratios of 92 to 98 dB between resonance (fr) and anti-resonance frequencies (a) using a 0-th shear horizontal (SH0) mode plate wave in a 28-30°YX-LiNbO3 plate. However, the resonators were of low frequency as r = 1.8 MHz and a = 2.3 MHz and suffer from ripples due to transverse mode between r and a. In this study, high frequency SH 0 mode plate wave resonators (r = 440 ∼ 560 MHz) with a wide bandwidth and a large impedance ratio and without ripples have been fabricated using an ultrathin LiNbO3 plate and an apodized interdigital transducer.
KW - 0-th shear horizontal mode
KW - Apodized IDT
KW - High frequency
KW - Large impedance ratio
KW - Plate wave
KW - Wideband
UR - http://www.scopus.com/inward/record.url?scp=84894336089&partnerID=8YFLogxK
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U2 - 10.1109/ULTSYM.2013.0428
DO - 10.1109/ULTSYM.2013.0428
M3 - Conference contribution
AN - SCOPUS:84894336089
SN - 9781467356862
T3 - IEEE International Ultrasonics Symposium, IUS
SP - 1680
EP - 1683
BT - 2013 IEEE International Ultrasonics Symposium, IUS 2013
T2 - 2013 IEEE International Ultrasonics Symposium, IUS 2013
Y2 - 21 July 2013 through 25 July 2013
ER -