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本文评述用声表面波叉指换能器的线性和非线性中频脉冲压缩色散滤波器的设计原理,特别强调计算和合成在距离旁瓣抑制可达到规定指标的高性能滤波器设计中的重要作用。测量了中心频率30-300兆赫、时间带宽积20-500的中频色散滤波器并报导了它们现在的性能水平。
This paper reviews the design principles of linear and nonlinear IF pulsed chromatic dispersion filters using SAW interdigital transducers with particular emphasis on the important role of computation and synthesis in high performance filter design that achieves the specified specifications for sidelobe suppression . Intermediate frequency dispersion filters with center frequencies of 30-300 MHz and time-bandwidth products of 20-500 were measured and their current performance levels were reported.