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西德无线电和数学研究所的ELRA雷达是一个S波段实验性相控阵雷达系统,它由分开的发射阵列和接收阵列组成,采用各种相干与非相干信号处理技术以及数据处理技术,包括有供目标搜索与跟踪、自适应干扰抑制和目标分辨用的多波束和多功能操作。本文讨论接收阵列中频放大器通道所用的两种声表面波滤波器的研究和应用。与常规的集总元件滤波器相比,上述滤波器有一些重要优点。采用一种专门的调谐方法来调节所有滤波器的中心频率,结果使均方根偏差小于一千赫。其中,有一种声表面波滤波器差不多是实现矩形脉冲匹配滤波器的理想途径。数百个滤波器的频率响应达到一致,改善了该系统的噪声抑制能力。所述滤波器是把大批生产的优质声表面波器件用于改善系统可靠性和性能的应用之一。
The ELR radar from the West German Institute of Radio and Mathematics is an S-band experimental phased-array radar system consisting of separate transmit and receive arrays using a variety of coherent and non-coherent signal processing and data processing techniques including Multi-beam and multi-function operation for target search and tracking, adaptive interference suppression and target resolution. This article discusses the research and application of two types of SAW filters used in receiving array IF amplifier channels. The above filter has some important advantages over conventional lumped element filters. A dedicated tuning method is used to adjust the center frequency of all filters, resulting in a less than one-kilo-square root mean square deviation. Among them, a kind of surface acoustic wave filter is almost the ideal way to realize the rectangular pulse matching filter. The frequency response of hundreds of filters is consistent, improving the system’s noise immunity. The filter is one of the applications for mass production of high quality surface acoustic wave devices for improving system reliability and performance.