自适应抽指加权技术

在传统的抽指加权技术基础上,该文提出了一种自适应抽指加权技术。通过计算确定抽指加权的起始位置和加权数值,能对切趾换能器进行部分指条的抽指加权。研究结果表明,根据该文提出方法研制的一款声表面波滤波器,其频率为61.60 MHz,-1 dB相对带宽为3.7%,带外抑制大于45 dB,矩形度为1.4,器件的综合性能得到改善。

Adaptive Withdrawal Weighted Technique

Based on the traditional withdrawal weighted technique, an adaptive withdrawal weighted technique is proposed in this paper. The withdrawal weighting of part fingers of the apodized transducer can be carried out by calculation to determine the starting position of the withdrawal weighting and the withdrawal weighted value. The results show that the developed filter based on the proposed method has frequency of 61.60 MHz , -1 dB relative bandwidth of 3.7%, out-of-band rejection of greater than 45 dB, rectangle factor of 1.4. The comprehensive performance of the device is superior to the traditional one.