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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >High gain CPW-fed UWB planar monopole antenna-based compact uniplanar frequency selective surface for microwave imaging
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High gain CPW-fed UWB planar monopole antenna-based compact uniplanar frequency selective surface for microwave imaging

机译：高增益CPW馈线UWB平面单极天线的微波成像基于单极天线的小型ULIPLANAR频率选择表面

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摘要

In this article, a novel uniplanar ultra-wideband (UWB) stop frequency selective surface (FSS) was miniaturized to maximize the gain of a compact UWB monopole antenna for microwave imaging applications. The single-plane FSS unit cell size was only 0.095 lambda x 0.095 lambda for a lower-operating frequency had been introduced, which was miniaturized by combining a square-loop with a cross-dipole on FR4 substrate. The proposed hexagonal antenna was printed on FR4 substrate with coplanar waveguide feed, which was further backed at 21.6 mm by 3 x 3 FSS array. The unit cell was modeled with an equivalent circuit, while the measured characteristics of fabricated FSS array and the antenna prototypes were validated with the simulation outcomes. The FSS displayed transmission magnitude below -10 dB and linear reflection phase over the bandwidth of 2.6 to 11.1 GHz. The proposed antenna prototype achieved excellent gain improvement about 3.5 dBi, unidirectional radiation, and bandwidth of 3.8 to 10.6 GHz. Exceptional agreements were observed between the simulation and the measured outcomes. Hence, a new UWB baggage scanner system was developed to assess the short distance imaging of simulated small metallic objects in handbag model. The system based on the proposed antenna displayed a higher resolution image than the antenna without FSS.
机译：在本文中，小型uniplanar超宽带（UWB）停止频率选择表面（FSS）小型化以最大化用于微波成像应用的紧凑UWB单极天线的增益。单平面FSS单元电池尺寸仅引入了较低工作频率的0.095λλ095λ095λ，通过将方形环与FR4基板上的交叉偶极组合来小型化。用共面波导进料在FR4基板上印刷所提出的六边形天线，其进一步以21.6mm×3×3FSS阵列以21.6mm的方式。用等效电路建模单位电池，而制造的FSS阵列和天线原型的测量特性被验证了模拟结果。 FSS显示在-10 dB以下的传输幅度和线性反射阶段，在带宽为2.6到11.1 GHz。所提出的天线原型的优异增益改善约为3.5 dBi，单向辐射和3.8至10.6 GHz的带宽。模拟与测量结果之间观察到特殊协定。因此，开发了一种新的UWB行李扫描仪系统，以评估手提包模型中模拟小金属物体的短距离成像。基于所提出的天线的系统显示比没有FSS的天线更高的分辨率图像。

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