Study on design procedure of low-profile and light-weight dual polarized planar antennas

在卫星通信和遥感领域，双极化平面天线是一种高效的辐射源。然而，这种天线的一个严重问题是其散热器的隔离特性较低。为了使天线具有良好的隔离特性，本文研制并测试了一种新型的双极化犬骨槽馈电平面天线。在c波段进行了各种实验来评估天线的性能。实验结果表明，这种双极化平面天线在回波损耗和隔离特性方面都具有优异的性能。天线的e面和h面辐射方向图在垂直和水平端口上也表现出优异的性能。矩量法和时域有限差分法的计算结果与实验结果吻合较好。本文研究了这种新型天线的基本设计技术和辐射特性。因此，这种类型的平面天线被认为是一种有效的双极化平面天线模型。

Dual-polarized planar antennas are used as an efficient radiator in the fields of satellite communication and remote sensing. One of serious problem in such an antenna is, however, a low isolation characteristic of its radiator. In order to achieve excellent isolation characteristic of the antenna, a new type of dual-polarized planar antenna fed by dogbone slots is developed and tested in this study. Various experiments were carried out in the C-band to estimate the performance of the antenna. The experimental results showed that this type of dual-polarized planar antenna has excellent performances in terms of both return-loss and isolation characteristics. The measured radiation patterns on E-and H-planes of the antenna show also excellent performances in both vertical and horizontal ports. The computed results obtained from moment method and FDTD method were agreed well with the experimental results. The basic design technique and radiation properties of this new type of antenna are obtained in this study. Therefore, this type of planar antenna is considered to be an effective model for a dual-polarized planar antenna.