摘要
针对目前微带贴片天线带宽窄、增益不高及未考虑散射性能等问题,提出了一种散射相消型极化不敏感超表面天线.该天线通过在偏心同轴馈电传统切角天线周围顺序旋转布局极化不敏感超表面,实现了宽带、宽角域雷达散射截面(RCS)减缩及增益提升、圆极化带宽拓展.仿真结果表明,最优化布局的超表面天线峰值增益高达10.30dB,3dB轴比带宽分别为4.60~5.60GHz及5.81~6.00GHz;与初始天线相比,峰值增益和平均增益分别提升了7.67dB和5.79dB;该天线在工作带宽内不仅实现了宽带高增益圆极化辐射特性,还具备低至-23.02dB的RCS,同时在接近20°角域范围内,RCS减缩量的稳定性保持良好.
In view of the current problems of microstrip patch antennas,such as narrow bandwidth,low gain and failure to consider scattering performance,a scattering-cancellation polarization-insensitive metasurface anten-na is proposed.By implementing a sequentially rotating arrangement of polarization-insensitive metasurface units around an offset-fed,conventional corner-truncated patch antenna,this design achieves broadband,wide-angle do-main radar cross section(RCS)reduction,as well as gain enhancement and circular polarization bandwidth expan-sion.Simulation results are demonstrated as follows:The peak gain of the metasurface antenna with the optimized layout is as high as 10.30 dB,and the 3 dB axial ratio(AR)bandwidths are 4.60-5.60 GHz and 5.81-6.00 GHz,re-spectively.Compared with the initial antenna,the peak gain and average gain are increased by 7.67 dB and 5.79 dB,re-spectively.Within the operational bandwidth,this antenna not only achieves wideband high-gain circularly polar-ized radiation characteristics,but also has an RCS as low as-23.02 dB.Meanwhile,the stability of the RCS reduc-tion amount remains good within an angular domain close to 20°.
作者
陈强
张迪
黄思宇
黄敏
卢念航
CHEN Qiang;ZHANG Di;HUANG Siyu;HUANG Min;LU Nianhang(Air Force Early WarningAcademy,Wuhan 430019,China)
出处
《空天预警研究学报》
2025年第4期289-293,共5页
JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH
基金
湖北省自然科学基金青年项目(2023AFB452)。
关键词
贴片天线
极化不敏感
极化转换超表面
雷达散射截面积
patch antenna
polarization-insensitive
polarization conversion metasurface
radar cross section(RCS)
