ABSTRACT

In this paper, a dual annular ring patch antenna with high isolation for Multiple Input Multiple Output (MIMO) Satellite application at 4 GHz is presented. The mutual coupling reduction and circular polarization are achieved by some perturbations in annular ring patch and microstrip stubs between antennas. These perturbations will excite two modes which is orthogonal ie. equal amplitude and phase shift to make it circularly polarized. The antenna design is fabricated on a substrate with permittivity 4.4 and 1.6 mm thickness. The simulated results are studied and analyzed for the proposed antenna. The isolation of better than 30 dB, axial ratio lower than 3 dB and gain of about 3.4 dB are obtained. The performance characteristics are simulated, measured and analyzed with different antenna parameters. The validated antenna shows that the simulated and measured results are in good agreement with each other.

摘要

在本文中，提出了一种具有高隔离度的双环形环形贴片天线，用于4 GHz的多输入多输出（MIMO）卫星应用。互耦的减小和圆极化是通过天线之间的环形贴片和微带短线中的一些扰动来实现的。这些扰动将激发两个正交的模式。振幅和相移相等，使其圆极化。天线设计是在介电常数为4.4和1.6 mm的基板上制造的。对拟议天线的仿真结果进行了研究和分析。获得了优于30 dB的隔离度，低于3 dB的轴向比率和约3.4 dB的增益。使用不同的天线参数对性能特征进行仿真，测量和分析。