新型农用昆虫雷达的设计研究与仿真实验

Design Research and Simulation Experiment of a New Type of Agricultural Insect Radar

根据雷达昆虫学中农业低空飞行昆虫监测的工程需要,研究了一种基于对数周期天线阵的超宽带昆虫雷达。首先,设计了对数周期天线环形阵,采用各阵元天线虚顶点共圆的空心环;然后,设计了兼具环形阵优点的伞形阵,通过调节控制杆的高低组成不同直径的立体阵,有利于在固定基座上变距变焦、更多维地监测目标;最后,利用相应的空间谱估计算法,形成了低空飞行昆虫监测的基本理论。计算机仿真分析表明,结果与理论要求相符。

In order to study the agricultural insect of flying at low altitude in radar entomology,a research of the ultra wide band insect radar based on log-periodic antenna array was proposed.Firstly,the research designed a ring-shaped array composed of log-periodic antennas,using array element antennas to form the center of the hollow ring with the virtual vertex.Secondly,an umbrella-shaped array with the advantages of the ring-shaped array was designed.The umbrella-shaped array by adjusting the control rod was able to become the stereoscopic arrays of different diameters.The new array was in favor of more dimensional monitoring by changing the radius and the focus on the fixed base.Finally,the corresponding DOA(Direction of Arrival)algorithm was adopted and the basic theory of low-altitude flying insect monitoring was preliminarily found.By computer simulation analysis,the result is consistent with the theoretical need.