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Highly Directional Microstrip Ultra Wide Band Antenna for Microwave Imaging System

机译：微波成像系统高定向微带超宽带天线

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摘要

This paper presents a novel highly directive ultra-wide band antenna for using in microwave imaging systems. Defected Ground Structure (DGS) is incorporated in the top and side of the ground plane to enhance the bandwidth impedance matching. Subsequently, for the further improvement in the bandwidth, gain and directivity staircase slot and square slot is etched at the bottom and top edge of the square patch plane. The low-frequency performance of the proposed antenna can be achieved by adjusting the gap between the ground and patch plane. The proposed microstrip antenna is fabricated on a Flame Retardant (FR4) plate of laminate substrate with dielectric constant of 4.3. The result shows that a directivity of 2.2-8.4dBi is achieved across a bandwidth from 1.43-8.92GHz. Furthermore, gain, directivity, radiation pattern characteristic and reflection coefficient have also been analyzed at the different resonant frequency
机译：本文提出了一种用于微波成像系统的新型高指向性超宽带天线。接地平面的顶部和侧面均集成了挠性接地结构（DGS），以增强带宽阻抗匹配。随后，为了进一步提高带宽，在方形贴片平面的底部和顶部边缘刻蚀增益和方向性阶梯槽和方形槽。所提出的天线的低频性能可以通过调整地面与配线板之间的间隙来实现。所提出的微带天线在介电常数为4.3的层压基板的阻燃（FR4）板上制造。结果表明，在1.43-8.92GHz的带宽范围内可实现2.2-8.4dBi的方向性。此外，还分析了在不同谐振频率下的增益，方向性，辐射方向图特性和反射系数

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