声表面波延迟线的优化设计.pdf

2016年10舰船电子对抗第39卷第5期SHLPBOARD ELECTRONIC COUNTERMEASUREVo 39 No, 5)声表面波延迟线的优化设计何明坤,范丽英,董(1.海盾需达声纳工程技术有限公同,青岛266107;2.解放年92721部队,舟山316000摘要:在现代雷达和通信系统中,声表面波延迟线是应用非常广泛的器件,与此同时,对该器件的技术要求也越发严格,以至于常规的声表面波延迟线很难满足。介绍了4种声表面波延迟线的优化设计方法,克服了传统延迟线受器件尺寸和基片材料长度、相对带宽及多路延迟的限制,满足了需达、通信等电子设备中对电信号的长延迟需求,为声表面波延迟线设计提供了参考。关键词:声表面波;延迟线;叉指换能器;倒相换能器中图分类号:TN65文献标识码文章编号:CN32-1413(2016)05-0060-04DOI:10.1626/,cnki. jcdzdk.2016.05.015Optimized Design of Surface Acoustic Wave Delay LineHE Ming-kun, FA N Li-ying DONG Ning(. Haidun Radar Sonar Engineering Co,ltd, Qingdao 266107. China:2.Unit 92721 of PlA, / houshan 316000, ChinaAbstract: In the modern radar and communication svstem,the surface acoustic wave delav line iswidely used ,at the same time the technology demand of the device is more and more strict, s0 thatthe conventional surface acoustic wave delay line is difficult to meet the demand. This paper mainlfocuses on the optimization design met hod of four kinds of surface acoustic wave delay lines, andthe method overcomes the limitation that traditional delay line is limited by the device size and theength of substrate material, relative bandwidth and the multi-channel delay, which meets the demands of long delay to the electric signal in the electronic equipments such as radar, communication, etc., and offers a reference for designing the surface acoustic wave delay lineKey words surface acoustic wave delay line inter cigital transducer s phase reverse transducer言1简要原理声表面波(SAW)延迟线具有结构简单、体积SAW延迟线由基片和设置在内部的2个叉指小、一致性好、温度稳定等特点,泛应用于雷达、通换能器(IDT)组成,结构如图1所示。左侧的1DT信等电子系统中,基本取代了电缆延迟线,成为中将输入电信号转换为声信号,经过声媒质表面传播频、射频段延迟信号的基础器件。目前,在扩频通信至右侧,右侧的DT将声信号还原成电信号输出系统的相关解週器、雷达动目标显示器、雷达距离回延迟时间T取决于基片媒质声表面波速度Vs和两波信号模拟器、延迟路径长度均衡器、电子对抗系统换能器之间的距离,即T=I./T的应答式干扰机和多相调制器系统中,均能见到由于SAW在基片媒质中的传播速度比电磁波SAW延迟线,且已成为关键器件之一。本文介绍慢约5个数量级,且能量集中在基片表面,所以了5种声表面波延迟线的优化设计方法,便于在设SAW延迟线不但体积小(仅是同轴延迟线的千分计时参考,以进一步提高其性能,满足更高的使用之一),还能同时实现多种信号处理功能(滤波和延要求迟功能结合)2收稿坷数擱-05-0