Multi band circularly polarized asymmetrical fractal boundary microstrip patch antenna using DGS for (2.58/3.02/5.58/6.44GHZ)

2015 Communication, Control and Intelligent Systems (CCIS) Pub Date : 2015-11-01 DOI:10.1109/CCINTELS.2015.7437872

Ashok Kumar, Mithilesh Kumar, G. Parmar

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引用次数: 6

Abstract

A design of compact multi band circularly polarized asymmetrical fractal boundary microstrip patch antenna with DGS (defected ground structure) and fractal boundary techniques has been proposed. Using the DGS technique a cross slot and circle are cut away at the centre of the ground plane to enhance the single band to multi band. The structure is asymmetrical along to the principal axes (x, y) because the radius of fractals are different and probe feed is applied at the diagonal of square patch then the excellent CP(circular polarization) is achieved. In the both techniques the proposed antenna sizes also reduce, besides the gain and directivity increase. Experimental results show as 10 dB return loss, gain and circular polarization at the frequencies 2.58, 3.02, 5.58, and 6.44 GHz. More over the 50 ohms feed position is optimized by moving the feed point along the diagonal of the square patch and get the effective gain and directivity grater then 6 dB at each frequency. The overall dimension of the proposed antenna is 42×42×3.3 mm3. This proposed antenna is used for Wi- MAX and WLAN applications.

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多波段圆极化非对称分形边界微带贴片天线(2.58/3.02/5.58/6.44GHZ)

提出了一种基于缺陷地面结构和分形边界技术的小型多波段圆极化非对称分形边界微带贴片天线的设计方法。利用DGS技术，在地平面中心切割一个交叉槽和圆，将单波段增强为多波段。由于分形半径不同，结构沿主轴(x, y)方向不对称，并在正方形贴片的对角线处施加探针进给，从而获得良好的圆偏振。在这两种技术中，除了增益和指向性增加外，所提出的天线尺寸也减小了。实验结果表明，在2.58、3.02、5.58和6.44 GHz频率下，回波损耗、增益和圆极化均为10 dB。在50欧姆以上的馈电位置，通过沿着正方形贴片的对角线移动馈电点来优化馈电位置，得到每个频率的有效增益和指向性梯度大于6 dB。建议天线的整体尺寸为42×42×3.3 mm3。该天线用于Wi- MAX和WLAN应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 Communication, Control and Intelligent Systems (CCIS)

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