基于可重构频率选择表面的天线RCS减缩研究

发布时间：2018-07-05 08:00

本文选题：天线 + 雷达截面　；参考：《电子与信息学报》2017年12期

【摘要】：针对天线雷达截面减缩问题,该文提出一种基于二极管控制的可重构频率选择表面结构,并将其用于天线的雷达截面减缩技术。论文将可重构技术应用于频率选择表面设计,使得频率选择表面可以在带通型以及带阻型之间进行相互切换。为了在保证天线辐射特性的前提下降低天线的雷达截面,该文考虑将可重构频率选择表面作为天线反射板用以置换一般的金属反射板。通过二极管导通/截断使得可重构频率选择表面反射板处于不同状态,以实现天线在不同工作状态下的RCS减缩控制及切换。仿真及实测结果表明,使用可重构频率选择表面反射板,天线雷达截面的最大减缩量可达20 d B以上,减缩角域可达-60?￡q￡+60?,同时天线的辐射特性几乎未发生变化。该方法可在保证天线辐射特性的基础上极大程度降低天线的雷达截面,并能做到天线雷达截面减缩频段的可重构。
[Abstract]:Aiming at the problem of antenna radar cross section reduction, this paper presents a reconfigurable frequency selective surface structure based on diode control, and applies it to antenna radar cross section reduction technology. In this paper, the reconfigurable technique is applied to the design of the frequency-selective surface, so that the frequency-selective surface can be switched between bandpass and band-stop-type. In order to reduce the radar cross section (RCS) of the antenna while ensuring the radiation characteristics of the antenna, the reconfigurable frequency selective surface is considered as the antenna reflector to replace the general metal reflector. The reconfigurable frequency selective surface reflectors are in different states by diode on-off / truncation to realize the RCS reduction control and switching of the antenna in different working states. The simulation and experimental results show that with the reconfigurable frequency selective surface reflector, the maximum reduction of radar cross section can reach more than 20 dB, and the reduction angle region can reach -60? Q 60, and the radiation characteristics of the antenna are almost unchanged. This method can greatly reduce the radar cross section of the antenna on the basis of ensuring the radiation characteristics of the antenna, and can reconfigure the radar cross section of the antenna in the reduced frequency band.
【作者单位】：西北大学信息科学与技术学院;
【基金】：国家自然科学基金(61501372)~~
【分类号】：TN957.2

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