摘要
针对天线带内雷达散射截面(RCS)缩减,提出通过调控阵列中哑元的天线模式项散射幅度和相位,使哑元模式项与阵列结构项散射对消,在保证阵列天线正常辐射的基础上实现天线带内RCS缩减;研究了Vivaldi天线单元和多元阵的结构模式项和天线模式项散射,分析了负载阻抗对天线模式项散射幅度和相位的影响。设计了一个1×6阵列,通过调控哑元负载阻抗实现了带内双线极化RCS缩减;当电磁波法向入射时,在6.7~8.9 GHz频段内实现了同极化RCS缩减,缩减峰值达14.9 dB;在8.3~12 GHz频段内实现了交叉极化RCS缩减,缩减峰值达17 dB;在30°斜入射情况下,在6.7~10 GHz频段内实现了同极化RCS缩减,缩减峰值达23.5 dB;该方法在不改变天线结构的基础上实现天线带内双线极化RCS缩减,有较好的工程应用价值。
The cancellation of the antenna mode scattering field of the dummy elements and the structure mode scattering field of the whole array is proposed,which is used to reduce the radar cross section(RCS)within the antenna band.Only the amplitude and the phase of the antenna mode scattering field of the dummy elements are controlled,so thatthe radiation properties of the array antenna are remained.The structural mode scattering field and antenna mode scattering field of Vivaldi antenna element and multi element arrays are studied.The affection of impendence loads on the antenna mode scattering field of dummy element is analyzed.The Vivaldi array with a configuration of 1×6 is designed,and the in-band dual-polarization RCS reduction is achieved by regulating the load impendence of the dummy element.When the electromagnetic waves are incident in the normal direction,the co-polarization RCS reduction is achieved in the frequency band of 6.7~8.9 GHz,and the reduction peak reaches 14.9 dB.Cross-polarization RCS reduction is achieved within the 8.3~12 GHz frequency band,with a reduction peak of 17 dB.On the 30°oblique incident condition,the co-polarization RCS reduction was achieved within 6.7~10 GHz frequency band,with the reduction peak reaching 23.5 dB.This method reduces the dual-linear polarization RCS within the antenna operating frequency band without changing the structure of antenna,which has good engineering application value.
作者
张紫琛
贾丹
梁梓宣
ZHANG Zichen;JIA Dan;LIANG Zixuan(The 54th Research Institute,China Electronics Technology Group Corporation,Shijiazhuang-050081,China)
出处
《计算机测量与控制》
2026年第2期235-242,共8页
Computer Measurement & Control
