该文设计了一种工作于X波段的平面印刷磁电偶极子天线,并设计了一种加载集总电阻的宽入射角、极化不敏感、宽频带吸波体(WBMA)。当平面波垂直入射时,吸波体在7.2~12.6 GHz范围内的吸波率大于90%,入射角增加至45?时仍能在X波段保持90%以...该文设计了一种工作于X波段的平面印刷磁电偶极子天线,并设计了一种加载集总电阻的宽入射角、极化不敏感、宽频带吸波体(WBMA)。当平面波垂直入射时,吸波体在7.2~12.6 GHz范围内的吸波率大于90%,入射角增加至45?时仍能在X波段保持90%以上的吸波率。通过将WBMA加载在天线四周,实现了天线雷达散射截面(RCS)的大幅缩减。实测和仿真结果表明:不同极化波垂直入射时,天线单站RCS减缩3 d B带宽为6.6~14.4GHz,最大减缩量达23.8 d B。中心频点10 GHz处,TE极化波照射时,双站RCS能实现?90?角域内的减缩,TM极化波照射时,在?35?角域内实现了减缩,同时天线辐射性能几乎保持不变。展开更多
该文设计了一种基于超表面(MS)的低雷达散射截面(RCS)宽频贴片阵列天线。该天线由工作在不同频段的两种开缝贴片天线组成2×4的八元阵,以此实现天线小型化并扩展其带宽,根据相位相消原理,将两种人工磁导体(AMC)以棋盘布阵的方式组...该文设计了一种基于超表面(MS)的低雷达散射截面(RCS)宽频贴片阵列天线。该天线由工作在不同频段的两种开缝贴片天线组成2×4的八元阵,以此实现天线小型化并扩展其带宽,根据相位相消原理,将两种人工磁导体(AMC)以棋盘布阵的方式组成超表面加载到天线阵周围,使其具有低RCS特性。实测和仿真结果表明:加载超表面后,天线工作带宽由5.7~6.2 GHz扩展为5.6~6.6 GHz,相对带宽增大1倍,辐射特性基本保持不变;当平面波垂直入射时,天线单站RCS减缩效果明显,其中,X极化波下3 d B减缩带宽为5.3~7.0 GHz,最大减缩量达31 d B,Y极化波下3 d B减缩带宽为5.8~6.9 GHz。展开更多
In this paper, a multi-band metasurface（MS） antenna array with low radar cross section（RCS） performance is proposed and measured. Firstly, a 44 antenna array is composed of four 22 Jerusalem cross structure antenn...In this paper, a multi-band metasurface（MS） antenna array with low radar cross section（RCS） performance is proposed and measured. Firstly, a 44 antenna array is composed of four 22 Jerusalem cross structure antenna arrays working at different frequency bands, which is aimed at enhancing the bandwidth effectively. Then, each antenna can be seen as a unit of MS in spite of adding the feeding structure. Based on phase cancellation principle, the MS is arranged into a chessboard configuration in order to realize wideband RCS reduction. Thus, excellent radiation and scattering characteristics are obtained simultaneously. Simulated and measured results indicate that this work provides a novel method to achieve bandwidth expansion as well as wideband RCS reduction of the antenna array.展开更多
文摘该文设计了一种工作于X波段的平面印刷磁电偶极子天线,并设计了一种加载集总电阻的宽入射角、极化不敏感、宽频带吸波体(WBMA)。当平面波垂直入射时,吸波体在7.2~12.6 GHz范围内的吸波率大于90%,入射角增加至45?时仍能在X波段保持90%以上的吸波率。通过将WBMA加载在天线四周,实现了天线雷达散射截面(RCS)的大幅缩减。实测和仿真结果表明:不同极化波垂直入射时,天线单站RCS减缩3 d B带宽为6.6~14.4GHz,最大减缩量达23.8 d B。中心频点10 GHz处,TE极化波照射时,双站RCS能实现?90?角域内的减缩,TM极化波照射时,在?35?角域内实现了减缩,同时天线辐射性能几乎保持不变。
文摘该文设计了一种基于超表面(MS)的低雷达散射截面(RCS)宽频贴片阵列天线。该天线由工作在不同频段的两种开缝贴片天线组成2×4的八元阵,以此实现天线小型化并扩展其带宽,根据相位相消原理,将两种人工磁导体(AMC)以棋盘布阵的方式组成超表面加载到天线阵周围,使其具有低RCS特性。实测和仿真结果表明:加载超表面后,天线工作带宽由5.7~6.2 GHz扩展为5.6~6.6 GHz,相对带宽增大1倍,辐射特性基本保持不变;当平面波垂直入射时,天线单站RCS减缩效果明显,其中,X极化波下3 d B减缩带宽为5.3~7.0 GHz,最大减缩量达31 d B,Y极化波下3 d B减缩带宽为5.8~6.9 GHz。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61471389,61701523,and 61671464)
文摘In this paper, a multi-band metasurface（MS） antenna array with low radar cross section（RCS） performance is proposed and measured. Firstly, a 44 antenna array is composed of four 22 Jerusalem cross structure antenna arrays working at different frequency bands, which is aimed at enhancing the bandwidth effectively. Then, each antenna can be seen as a unit of MS in spite of adding the feeding structure. Based on phase cancellation principle, the MS is arranged into a chessboard configuration in order to realize wideband RCS reduction. Thus, excellent radiation and scattering characteristics are obtained simultaneously. Simulated and measured results indicate that this work provides a novel method to achieve bandwidth expansion as well as wideband RCS reduction of the antenna array.
