摘要
分析了声表面波双模谐振二极滤波器的等效电路，提出了利用计算机优化方法设计该滤波器结构参数的模型。通过实例设计出了中心频率约１１４ＭＨｚ、带宽２４ｋＨｚ、插入损耗０．３９ｄＢ的二极窄带滤波器。结果表明，该方法适用于多参数、极窄带、低插人损耗的声表面波滤波器的设计。
Based on an analysis of the equivalent circuit of the two-pole SAW filter with double-mode resonator,a formation-parameter model is advanced for the on-computer optimization of its design.Trial designs of a two-pole narrow-bandpass filter with a centre frequency of about 114 MHz, bandwidth of 24 kHz and an insertion loss of 0. 39 dB show that the method is applicable to the design of multi-parameter,extra-narrow-bandpass,low-insertion-loss SAW filters.
关键词
声表面波
双模谐振
滤波器
计算机优化设计
surface acoustic wave(SAW)
filter with double-mode resonator
optimized on-computer design
