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引用次数: 0
摘要
本文研究了在不影响天线特性的情况下，利用地幔隐身技术降低共形贴片天线的带外雷达截面。首先，在ε r = 10的介质基片上设计了一种插入馈电的共形微带天线。贴片天线的工作频率为5ghz，带宽为80mhz。然后，除了天线的贴片和馈线覆盖的区域外，在基板层的顶部放置贴片频率选择表面(FSS)。FSS、衬底和地形成一层斗篷，将天线结构的单、双基地RCS从8.5 GHz降低到10.5 GHz。将新天线的传播特性与原天线进行了比较，结果表明，地幔隐身对天线的阻抗带宽、增益和方向图的影响可以忽略不计。
Radar Cross Section Reduction of Conformal Patch Antenna Using Mantle Cloak
In this paper out-of-band radar cross section (RCS) reduction of conformal patch antenna without affecting the antenna characteristics is investigated by mantle cloaking. First, a conformal microstrip antenna with inset feed is considered on dielectric substrate with ε r = 10 grounded by a perfect electric conductor (PEC) cylinder. The working frequency and bandwidth of the patch antenna are 5 GHz and 80 MHz, respectively. Then, a patch frequency selective surface (FSS) is placed on top of the substrate layer except the regions covered by the patch and feed line of the antenna. The FSS, substrate and ground make a mantle cloak decreasing the monostatic and bistatic RCS of the antenna structure from 8.5 GHz to 10.5 GHz. The propagation characteristics of the new antenna are compared with the first one and it is shown that mantle cloaking has negligible effect on impedance bandwidth, gain and pattern of the antenna.
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