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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。
To reduce the size of the airborne telemetry antenna, the problem of sharp reduction of the bandwidth and gain of the antenna is caused. To solve the above problem, a high-resistance surface structure is introduced on the airborne telemetry antenna. Due to the size and bandwidth of the high-resistance surface structure far from being able to meet the application requirements, a new high-resistance surface structure that can be applied to the telemetry transmitting antenna is designed so that the antenna gain is increased while the size of the telemetry antenna is reduced. In addition, on the basis of the equivalent circuit model, it solves the contradiction between small size and wide bandgap in high-resistance surface design. The experimental results show that the low profile, high gain and broadband of the telemetry antenna can be realized by using the new high impedance surface. The proposed antenna structure and design ideas can significantly improve the performance of the telemetry antenna.