Optimization of frequency characteristics for SAW device using apodization weighting method

• 作 者: 周磊 张楷亮 王芳 韩叶梅 苗银萍 李冬梅 梁圣法
• 机 构: Tianjin Key Laboratory of Film Electronic & Communication Devices, School of Electronics Information
• 出 处: Optoelectronics Letters
• 发表日期: 2015年02期
• 关键词: weighting Chebyshev suppression removed inclusion restrained appearance overlap

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.

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.