一种探地雷达平面螺旋天线的研究与开发

Research and development of planar spiral antenna used in ground penetrating radar

对一种用于UHF波段探地雷达的平面阿基米德螺旋天线进行了分析和研制,重点分析了腔体中不同吸波材料的设置结构对天线频率性能的影响,给出了相关特性的实测结果,并根据各种影响设计了一种体吸波结构,实测结果说明了该设置结构的有效性。给出了该天线的实测方向图,进一步说明了该天线的可靠性。

In this paper, a planar Archimedean-spiral antenna used in UHF ground penetrating radar system is analyzed and developed. The effect on frequency property for antenna by changing absorbing structures placed in reflecting cavity is analyzed, and the measured result of the property is presented. According to the ana- lytical result, a new absorbing structure is designed and actual measurement is carried out. Results based on actual measurement show that this absorbing structure is effective. The measured azimuth pattern of the antenna is shown, which is the further evidence of the reliability of the antenna.