A Novel Planar Slot Array Antenna With Omnidirectional Pattern
A Novel Planar Slot Array Antenna With Omnidirectional Pattern
复制标题
一种新型全向平面缝隙阵列天线
DOI：
10.1109/tap.2011.2165481
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发表时间：
2011-12-01
影响因子：
5.7
通讯作者：
Xu, Xiao-Bang
中科院分区：
文献类型：
--
作者：
Chen, Xing;Huang, Kama;Xu, Xiao-Bang
提出了一种在水平面内具有全向辐射方向图的新型平面缝隙阵列天线。该天线具有基于带状线的简单结构。它的制造采用低成本和精确的平面印刷技术。在两个平行的地平面上蚀刻一系列矩形环形槽，用作辐射器。在这项研究中，天线的基本工作原理进行了讨论。为了获得良好的全向辐射特性，采用遗传算法在集群系统上设计了一种具有8个背靠背缝隙的天线。制作并测量了一个原型天线。测量结果与仿真结果一致，表明该天线具有良好的性能。例如，在5.8 GHz的工作频率下，它具有良好形成的全向方向图，在水平面中的最大增益变化小于0.5 dB，10 dBi的高增益水平，旁瓣低于主瓣10 dB，并且没有波束偏斜。同时，该天线实现了4.6%的阻抗带宽的中心频率（5.68-5.95 GHz）为S11 <; -10 dB，并表现出稳定的全向性能在阻抗带宽。
A novel planar slot array antenna with omnidirectional radiation pattern in the horizontal plane is proposed. The antenna has a simple structure based on a stripline. Its fabrication employs a low-cost and accurate planar printed technique. A series of rectangular-shaped loop slots are etched on two parallel ground planes, and act as radiators. The basic principle of operation of the antenna is discussed in this study. An antenna with eight back-to-back slots is designed by employing the genetic algorithm (GA) implemented on a cluster system to achieve good omnidirectional radiation characteristics. A prototype antenna is fabricated and measured. The measurement results agree with the simulation data and show that this antenna possesses encouraging features. For example, at the working frequency of 5.8 GHz, it has a well-formed omnidirectional pattern with maximum gain variation less than 0.5 dB in the horizontal plane, a high gain level of 10 dBi, side lobes 10 dB below the main lobe and no beam squint. Meanwhile, this antenna achieves an impedance bandwidth of 4.6% of the center frequency (5.68-5.95 GHz) for S11 <; -10 dB and exhibits stable omnidirectional performance over the impedance bandwidth.