CPW-fed broadband circularly polarized microstrip rectangular slot antenna with circular shaped tuning stub

2013 International Conference on Microwave and Photonics (ICMAP) Pub Date : 2013-12-01 DOI:10.1109/ICMAP.2013.6733476

Rohit Kumar Saini, S. Dwari

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引用次数: 2

Abstract

In this paper a rectangular slot antenna fed by coplanar waveguide (CPW) with circular shaped tuning stub for broadband circular polarization is presented. Two circular metallic arcs shaped grounded perturbation are introduced at diagonally opposite corners of the rectangular slot to obtain circular polarization with wide axial ratio bandwidth. This slot antenna has been designed and optimized on a FR4 substrate with dielectric constant εr= 4.3 and substrate thickness h=1.53mm. The simulated results of this antenna show impedance bandwidth 151.64% from frequency range 1.93GHz to 14.06GHz at VSWR ≤ 2 throughout this band and axial ratio band width 32.68% from frequency range 3.7GHz to 5.14GHz. The simulated radiation patterns of this antenna are Omni-directional in H-plane and Bi-directional in E-plane. The effect of variation in radius of metallic arcs on impedance bandwidth and axial ratio bandwidth has also been analyzed using HFSS Simulator. The proposed antenna can be easily integrated with radio-frequency/ Microwave Circuitry with low manufacturing cost.

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带圆形调谐根的cpw馈电宽带圆极化微带矩形槽天线

本文提出了一种带圆形调谐根的共面波导馈电矩形槽天线，用于宽带圆极化。在矩形槽的对角线对角处引入两个金属圆弧型接地微扰，得到具有宽轴比带宽的圆偏振。在介电常数εr= 4.3、衬底厚度h=1.53mm的FR4衬底上设计并优化了该缝隙天线。仿真结果表明，该天线在1.93GHz ~ 14.06GHz频带内，在整个频带VSWR≤2时阻抗带宽为151.64%，在3.7GHz ~ 5.14GHz频带内轴比带宽为32.68%。该天线的模拟辐射方向图在h面为全向，在e面为双向。利用HFSS模拟器分析了金属弧半径变化对阻抗带宽和轴比带宽的影响。该天线易于与射频/微波电路集成，制造成本低。

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2013 International Conference on Microwave and Photonics (ICMAP)

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