Dual-Feed Dual-Polarized Patch Antenna With Low Cross Polarization and High Isolation
Dual-Feed Dual-Polarized Patch Antenna With Low Cross Polarization and High Isolation
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DOI：
10.1109/tap.2009.2028702
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发表时间：
2009-10-01
影响因子：
5.7
通讯作者：
Row, Jeen-Sheen
中科院分区：
文献类型：
--
作者：
Sim, Chow-Yen-Desmond;Chang, Chun-Chuan;Row, Jeen-Sheen
实验研究了一种低交叉极化、高隔离度的双馈电双极化微带天线。设计了两种不同的馈电机制，从单个辐射贴片激励双正交线偏振模。其中一个模式由一个由谐振环缝和T形微带馈线组成的口径耦合馈电线激励，另一个模式由一对相位差为180度的曲折微带线激励。两个线性极化模式被设计为工作在2400 MHz的频带，从测量结果，它被发现，两个馈电端口之间的隔离度小于40 dB跨越10 dB的输入阻抗带宽为14%。此外，从两种模式的辐射图中观察到低交叉偏振，特别是在宽边方向。还进行了仿真分析以支持测量结果。
A dual-feed dual-polarized microstrip antenna with low cross polarization and high isolation is experimentally studied. Two different feed mechanisms are designed to excite a dual orthogonal linearly-polarized mode from a single radiating patch. One of the two modes is excited by an aperture-coupled feed, which is comprised of a compact resonant annular-ring slot and a T-shaped microstrip feed line; while the other is excited by a pair of meandering strips with a 180 degrees phase differences. Both the linearly-polarized modes are designed to operate at 2400 MHz frequency band, and from the measured results, it is found that the isolation between the two feeding ports is less than 40 dB across a 10 dB-input-impedance bandwidth of 14%. In addition, low cross polarization is observed from the radiation patterns of the two modes, especially at the broadside direction. Simulation analyses are also carried out to support the measured results.