摘要
针对在高速、瞬态交会条件下运动目标速度测试的需求,传统测速雷达具有体积大、机动性差等问题。在分析测速雷达前端特性的基础上,提出了一种高速瞬态目标交会多普勒测速前端模块设计方案,该方案采用超外差式收发系统和三角波调制机制。本文对相关器件进行了选择,详细介绍了系统的前端电路的设计与仿真,测试得到输出频率为37.504 GHz,输出功率为16.1 dBm。对横截面积为8 cm~2的金属物体在距雷达前端15 cm处的中频峰峰值为20 mV,测速雷达前端具有较高的接收灵敏度。
To meet the requirement of speed test for moving target under the condition of high speed and transient rendezvous, The traditional speed-measuring radar has the problems of large volume and poor motility. A scheme for doppler speed-measuring front-end module for high speed and transient target under the condition of rendezvous is proposed based on the analysis of the characteristics of the speed-measuring radar front-end. Super heterodyne transceiver system and triangular wave modulation are adopted in this scheme. This paper introduces the selection of relevant components, expatiates front-end circuit system design and simulation, the output frequency is 37.504 GHz and the output power is 16.1 dBm. The peak-peak voltage of intermediate frequency is 20 mV when a metal object with area of 8 cm~(2 )was moved about 15 cm to the radar front-end, the speed-measuring radar front-end has a high receiving sensitivity.
引文
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