一种兼具宽带增益改善和宽带、宽角度低雷达散射截面的微带天线

发布时间：2018-03-05 10:02

本文选题：频率选择表面　切入点：低雷达散射截面　出处：《物理学报》2014年22期 　论文类型：期刊论文

【摘要】：设计并制备了一种兼具高增益和低雷达散射截面(radar cross section,RCS)的微带天线,通过给原始微带天线加载双屏频率选择表面(frequency selective surface,FSS)覆层,使其具有宽带的3 d B增益带宽和宽带、宽角度的低RCS特性.该FSS单元的上层是四个开口处都焊有电阻的金属环结构,下层是中间和四边都开缝的金属贴片结构.上层加载的电阻主要用于吸收雷达入射波,减缩天线RCS;下层的贴片和天线地板构成Fabry-Perot谐振腔,提高天线增益.在5.75—11.37 GHz频带内,S22-10 d B,S12-10 d B;在11.21—11.54 GHz频带内,S11反射系数相位曲线斜率为正,幅度模值均在0.86以上.实验结果表明:与原始天线相比,在谐振频点11.73 GHz处,天线增益提高3.4 d B,E,H面的半功率波束宽度分别减小16°和50°;天线的3 d B增益带宽为10.00—12.40 GHz,完全覆盖阻抗带宽.在4.10—11.30 GHz频带内,天线法向RCS均有3 d B以上的减缩,最大减缩23.08 d B;4.95 GHz处的单站RCS在-20°—20°的角域、双站RCS在-37°—37°的角域均有3 d B以上的减缩.实验结果证实了该FSS覆层可用于同时改善天线的辐射和散射性能.
[Abstract]:The design and preparation of a high gain and low radar cross section (radar cross, section, RCS) of the microstrip antenna, through the choice of surface to the original microstrip antenna (frequency selective surface, dual frequency FSS) coatings, which has 3 D B broadband and broadband gain bandwidth, low RCS characteristics and wide angle the unit is FSS. The upper four openings are welded with the resistance of the metal ring structure, the lower is the metal patch structure intermediate and four sides are slotted. The upper load resistance is mainly used to absorb incident radar wave, antenna RCS reduction; the lower patch antenna and a floor Fabry-Perot resonator, improve the antenna gain. In 5.75, the 11.37 GHz band, S22-10 D B, S12-10 D B; in the 11.21 - 11.54 GHz frequency band, S11 phase of the reflection coefficient curve, amplitude modulus values were above 0.86. The experimental results show that compared with the original antenna at resonance The frequency of 11.73 GHz, the gain of the antenna is improved by 3.4 D B, E H, the half power beam width is decreased by 16 DEG and 50 DEG; the antenna gain bandwidth of 10 B 3 D - 12.40 GHz, completely covering the impedance bandwidth. In 4.10 - 11.30 GHz band antenna method to RCS were 3 D above B the maximum reduction, reduction of 23.08 D B; 4.95 GHz at single station RCS in angle domain -20 degrees - 20 degrees, more than 3 D B reduction of bistatic RCS in angle domain were -37 ~ 37 degrees. The experimental results demonstrate that the FSS coating can be used for radiation and scattering properties at the same time improve the antenna.

【作者单位】：空军工程大学信息与导航学院;
【基金】：国家自然科学基金(批准号:61271100) 陕西省自然科学基础研究计划项目(批准号:2012JM8003)资助的课题~~
【分类号】：TN957.2

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