摘要
在PbMoO4声光器件的换能器与电源之间插入阻抗匹配网络,对换能器的声能传输损耗有一定的补偿作用。给出了阻抗匹配后换能器损耗的计算公式、匹配电路结构和元件值、能量损耗与频率的关系曲线图,得出合适的阻抗匹配网络可使得PbMoO4声光器件换能器的声能传输损耗降低,3 dB频带宽度增大的结论。利用阻抗匹配网络的这一优点,优化设计了PbMoO4声光器件换能器的结构。
Inserting an impetance matching network between the transducer and the driven source of PbMoO4 acousto-optic device can to some extent compensate acoustics energy transfer loss of transducer.Provided the formulas for calculating transducer energy loss after inserting matching network,determined the construction and component value of matching network,and showed TL-F curve of transducer（where TL is energy loss and F is frequency）.Concluded that for PbMoO4 acousto-optic device,appropriate impetance matching network can lower acoustics energy transfer loss and broaden 3 dB bandwidth of transducer.Based on the merit of impetance matching network,optimized the structure of transducer PbMoO4 acousto-optic device.
出处
《压电与声光》
CSCD
北大核心
2011年第2期199-202,共4页
Piezoelectrics & Acoustooptics
关键词
声光器件
换能器
阻抗匹配
损耗
acousto-optic device
transducer
impetance matching
loss
