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Design of asymmetrically slotted hexagonal patch antenna for high-gain UWB applications

机译:高增益UWB应用中的不对称开槽六角形贴片天线设计

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摘要

A compact slot antenna for high-gain ultra wideband applications is presented. The slot is asymmetrically cut in the ground plane and is a combination of two rectangles. A hexagonal patch with two stepped coplanar waveguide-feed is used to excite the slot. The capacitive reactance of the hexagonal patch is neutralized by the inductive reactance created by the asymmetric slot and results into wider impedance matching. The measured impedance bandwidth of the proposed antenna is 11.85 GHz (2.9-14.75 GHz). The radiation patterns of the proposed antenna are found to be omni-directional in the H-plane and bi-directional in the E-plane. To enhance the gain of the antenna, a compact three-layer frequency selective surface (FSS) is used as a reflector. The overall thickness of the FSS is 3.5 mm. There is 4-5 dBi improvement in antenna gain after application of the FSS. The measured and simulated results are in good agreement.
机译:提出了一种用于高增益超宽带应用的紧凑型缝隙天线。该槽在接地平面上不对称地切割,并且是两个矩形的组合。具有两个阶梯状共面波导馈源的六边形斑片用于激发缝隙。六角形贴片的电容电抗被非对称槽产生的电感电抗抵消,并导致更宽的阻抗匹配。建议天线的测量阻抗带宽为11.85 GHz(2.9-14.75 GHz)。发现所提出的天线的辐射方向图在H平面是全向的,而在E平面是双向的。为了提高天线的增益,紧凑的三层频率选择表面(FSS)被用作反射器。 FSS的总厚度为3.5毫米。应用FSS后,天线增益提高4-5 dBi。测量结果和模拟结果吻合良好。

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