Optimization of frequency characteristics for SAW device using apodization weighting method |
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Authors: | ZHOU Lei ZHANG Kai-liang WANG Fang HAN Ye-mei MIAO Yin-ping LI Dong-mei LIANG Sheng-fa |
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Affiliation: | AN Qi-chang;ZHANG Jing-xu;YANG Fei;SUN Jing-wei;Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences; |
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Abstract: | In this paper, the positive influence of apodization weighting method on frequency characteristics of surface acoustic wave (SAW) temperature sensor is investigated. Simulation and experiment results show that side lobe suppression abilities of the sensor can be improved by using apodization weighting which is based on Chebyshev window. Meanwhile, we find that the side lobe of the sensor can be further restrained, when the dummy electrodes are removed. Frequency-temperature characteristics of the devices are independent of the inclusion of dummy electrodes. The apodization weighted SAW temperature sensor shows great application potential in occasions with strong electromagnetic interference. |
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