Dual-polarized slot-coupled planar antenna with wide bandwidth
Dual-polarized slot-coupled planar antenna with wide bandwidth
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DOI：
10.1109/tap.2003.809842
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发表时间：
2003-05
影响因子：
5.7
通讯作者：
Shi-Chang Gao;Lewei Li;M. Leong;T. Yeo
中科院分区：
文献类型：
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作者：
Shi-Chang Gao;Lewei Li;M. Leong;T. Yeo
提出了一种新型双极化缝隙耦合微带贴片天线，该天线具有高隔离度、低交叉极化、宽频带和低后向辐射等优点。耦合槽为H形槽。为了实现宽带宽和易于与有源电路集成，它采用了槽耦合堆叠微带贴片。理论分析是基于时域有限差分法（FDTD）。首先，对单输入端口天线的输入阻抗进行了参数研究。在此基础上，设计、制作了一个双极化微带天线，并进行了测试。测量回波损耗的阻抗带宽超过20.9%，两个极化端口之间的隔离度优于36 dB的带宽。在E和H平面中的交叉极化水平优于22 dB。天线辐射方向图的前后比优于21 dB。回波损耗，隔离和辐射模式的理论和实验结果，并进行了讨论。
A new dual-polarized slot-coupled microstrip patch antenna is presented, which can achieve high-isolation, low cross-polarization levels, a wide bandwidth, and low backward radiation levels. The coupling slot is an H-shaped slot. For wide bandwidth and easy integration with active circuits, it uses slot-coupled stacked microstrip patches. The theoretical analysis is based on the finite-difference time-domain (FDTD) method. First, a parametric study on the input impedance of the antenna with a single input port is presented. Based on the results, a dual-polarized microstrip antenna is designed, fabricated, and then measured. The measured return loss exhibits an impedance bandwidth of over 20.9% and the isolation between two polarization ports is better than 36 dB over the bandwidth. The cross-polarization levels in both E and H planes are better than 22 dB. The front-to-back ratio of the antenna radiation pattern is better than 21 dB. Both theoretical and experimental results of return loss, isolation, and radiation patterns are presented and discussed.