高阻表面在机载遥测天线中的应用研究

Application Study on High Impedance Surface in Airborne Telemetry Antenna

针对机载遥测天线尺寸的过分缩减会引起天线带宽和增益的急剧劣化的问题,为解决上述问题,提出了在机载遥测天线上引入高阻表面结构。由于目前高阻表面结构的尺寸和带宽远远不能满足应用的要求,设计了可以应用于遥测发射天线的新型高阻表面结构,使遥测天线在剖面尺寸减小的同时增加了天线的增益。另外,在等效电路模型的基础上,解决了高阻表面设计中小尺寸和宽带隙相矛盾的情况。试验结果证明,应用新型高阻表面可以实现遥测天线的低剖面、高增益、宽频带,所提出的天线结构和设计思路可以显著提高机载遥测天线的性能。

Aiming to the problems that excessive reduction of airborne telemetry antenna＇s size will cause a sharp deterioration of the antenna＇s bandwidth and gain, this paper proposed a method which uses a high - impedance surface in the airborne telemetry antenna. As the size and bandwidth of the high - impedance surface is far from being a- ble to meet the application requirements, this paper designed a new high - impedance surface which can be applied to the telemetry transmitter antenna, and reduced the profile size of the telemetry antenna and increased the gain of the antenna at the same time. In addition, based on the equivalent circuit model, we resolved the contradictory situation of small size and wide band gap in the high - impedance surface design. The results show that the low profile, high gain and wide bandwidth of the telemetry antenna can be achieved by using the new high - impedance surface. The antenna structure and design ideas presented in this paper can significantly improve the performance of airborne telemetry antenna.