Simulation of solidly mounted plate wave resonator with wide bandwidth using 0-th shear horizontal mode in LiNbO3 plate
Simulation of solidly mounted plate wave resonator with wide bandwidth using 0-th shear horizontal mode in LiNbO3 plate
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DOI：
10.7567/jjap.54.07hd09
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发表时间：
2015-07-01
影响因子：
1.5
通讯作者：
Tanaka, Shuji
中科院分区：
文献类型：
--
作者：
Kadota, Michio;Tanaka, Shuji
使用数字TV信道（TV白色空间）的空闲频带的认知无线电系统需要具有宽的中心频率和带宽可调谐范围的可调谐滤波器。超宽带谐振器是实现可调谐滤波器的关键器件，因为可调谐范围受到谐振器带宽的限制。已知使用超薄LiNbO 3板的0阶剪切水平（SH 0）模式板波谐振器具有大的机电耦合因子，即，大BW，但超薄LiNbO3板的结构脆弱性是有问题的。本研究利用有限元素法模拟，系统地探讨固装式SH0模式板波共振器之可行性。优化了换能器的欧拉角、铌酸锂片厚度、叉指换能器的材料和厚度等设计参数。在最佳设计下，带宽可达26%。(C)2015日本应用物理学会
A cognitive radio system using a vacant frequency band of digital TV channels (TV white space) requires a tunable filter with wide tunable ranges of center frequency and bandwidth. An ultra-wideband resonator is a key device to implement the tunable filter, because the tunable range is limited by the bandwidth (BW) of the resonators. A 0-th shear horizontal (SH0) mode plate wave resonator using an ultra-thin LiNbO3 plate is known to have a large electromechanical coupling factor, i.e., a large BW, but the structural fragility of the ultra-thin LiNbO3 plate is problematic. In this study, the feasibility of solidly mounted resonator type SH0 mode plate wave resonator was investigated systematically by finite element method simulation. The design parameters including the Euler angle, thickness of a LiNbO3 plate, and the material and thickness of an interdigital transducer were optimized. With the best design, a BW as wide as 26% is obtained. (C) 2015 The Japan Society of Applied Physics