Wideband Circularly Polarized E-Shaped Patch Antenna for Wireless Applications [Wireless Corner]
Wideband Circularly Polarized E-Shaped Patch Antenna for Wireless Applications [Wireless Corner]
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DOI：
10.1109/map.2010.5687547
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发表时间：
2010-10
影响因子：
3.5
通讯作者：
A. Khidre;K. Lee;Fan Yang;A. Eilherbeni
中科院分区：
文献类型：
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作者：
A. Khidre;K. Lee;Fan Yang;A. Eilherbeni
提出了一种实现圆极化探头馈电的宽带轴比单层微带贴片天线的新技术。该天线是传统E形贴片的改进形式，用于加宽基本贴片天线的阻抗带宽。通过使E面片的两个平行槽不相等，引入了不对称性。这会在贴片上产生两个相互垂直的电流，从而激发出圆偏振场。所提出的技术具有E形贴片设计简单的优点，只需要确定槽的长度、宽度和位置参数。通过参数分析，研究了天线不同尺寸的影响。在此基础上，提出了一种圆偏振E形贴片的设计方法。遵循IEEE 802.11Big WLAN频段的建议步骤，设计了一个原型。对制作的天线进行了性能测试，并与仿真结果进行了比较。给出了不同衬底厚度和材料类型的各种例子，并与最近提出的圆极化U形缝隙贴片天线进行了比较。
A new technique to achieve a circularly polarized probe-fed single-layer microstrip-patch antenna with a wideband axial ratio is proposed. The antenna is a modified form of the conventional E-shaped patch, used to broaden the impedance bandwidth of a basic patch antenna. By letting the two parallel slots of the E patch be unequal, asymmetry is introduced. This leads to two orthogonal currents on the patch and, hence, circularly polarized fields are excited. The proposed technique exhibits the advantage of the simplicity of the E-shaped patch design, which requires only the slot lengths, widths, and position parameters to be determined. Investigations of the effect of various dimensions of the antenna have been carried out via parametric analysis. Based on these investigations, a design procedure for a circularly polarized E-shaped patch was developed. A prototype has been designed, following the suggested procedure for the IEEE 802.11big WLAN band. The performance of the fabricated antenna was measured and compared with simulation results. Various examples with different substrate thicknesses and material types are presented and compared with the recently proposed circularly polarized U-slot patch antennas.