西安电子科技大学学报

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采用可重构结构型吸波材料的天线RCS减缩方法

王夫蔚1,2;郭立新2;龚书喜1   

  1. (1. 西安电子科技大学 天线与微波技术重点实验室,陕西 西安 710071;
    2. 西安电子科技大学 物理与光电工程学院,陕西 西安 710071)
  • 收稿日期:2016-03-10 出版日期:2017-04-20 发布日期:2017-05-26
  • 作者简介:王夫蔚(1987-),男,博士,E-mail:wfwraul@163.com
  • 基金资助:

    中央高校基本科研业务费专项资金资助项目(7214616403)

Antenna radar cross section reduction by a reconfigurable radar absorbing structure

WANG Fuwei1,2;GUO Lixin2;GONG Shuxi1   

  1. (1. Science and Technology on Antennas and Microwave Lab., Xidian Univ., Xi'an 710071, China;
    2. School of Physics and Optoelectronic Engineering, Xidian Univ., Xi'an 710071, China)
  • Received:2016-03-10 Online:2017-04-20 Published:2017-05-26

摘要:

针对天线雷达散射截面减缩问题,提出了一种基于二极管控制的可重构结构型吸波材料的雷达散射截面分时减缩方法.将可重构技术应用于结构型吸波材料设计及可重构结构型吸波材料应用于天线反射板.当二极管截断时,反射板即为普通金属反射板,此时对应天线的工作状态;当二极管导通时,对应为天线的非工作状态,此时利用结构型吸波材料的吸波特性可最大限度地降低天线的雷达散射截面;当二极管为导通状态和截断状态时,结构型吸波材料的吸波特性分别为-25.0dB和0.8dB.同时,为达到宽频雷达散射截面减缩的目的,在普通排列的可重构结构型吸波材料反射板的基础上,设计了一款类棋盘结构的可重构反射板.仿真及实测结果表明,在非工作状态使用普通排列可重构结构型吸波材料反射板时,天线雷达散射截面的最大减缩量可达15dB以上;当使用类棋盘分布的可重构结构型吸波材料反射板时,天线雷达散射截面的减缩带宽可达5~18GHz,最大减缩量可达8dB以上,同时天线的辐射特性几乎未发生变化.该方法在保证天线辐射特性的基础上,最大程度地降低了天线的雷达散射截面.

关键词: 雷达散射截面, 可重构, 结构型吸波材料

Abstract:

An active reconfigurable Radar absorbing structure using a pin diode for the radar cross section (RCS) reduction of the antenna reflector is proposed, which is able to be switched between metal reflector with OFF-state diodes and absorber with ON-state diodes. The reflection coefficient of the RAS reflector is able to be switched between less than -25.0dB with OFF-state diodes and more than -0.8dB with ON-state diodes around 8.3GHz. The RAS reflector with ON-state diodes is applied to a dipole antenna reflector and gives radiation performance equivalent to that of the dipole with a metal reflector. The RAS reflector with OFF-state diodes is used as a radar absorber for RCS reduction. Meanwhile, a chessboard-like geometry RAS reflector is proposed in response to the wideband RCS reduction. The RCS reduction band covers the working band and is extended to 5~18GHz. The results show that the reconfigurable RAS reflector can contribute to the antenna RCS reduction at the working frequency, with the radiation performance of the dipole antenna preserved.

Key words: radar cross section (RCS), reconfigurable, radar absorbing structure