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Slot loaded EBG-based metasurface for performance improvement of circularly polarized antenna for WiMAX applications

机译:用于基于EBG的SLOT的EBG元曲面,用于WiMAX应用的圆极化天线的性能改进

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摘要

In this paper, an electromagnetic band gap (EBG) metasurface (MS) superstrate-based circularly polarized antenna for the WiMAX (3.5 GHz) band is proposed. The proposed structure comprises a 2 x 2 slot-loaded rectangular patch MS array that can be perceived as a polarization-dependent EBG MS superstrate. Furthermore, to achieve circular polarization, the proposed antenna has an inclined coupling slot onto the ground with a conventional coplanar waveguide feed line. The proposed antenna has a compact structure with a low profile of 0.037 lambda(0) (lambda(0) stands for the free-space wavelength at 3.48 GHz) and a ground size of 30 x 30 mm(2). The measured results show that the -10 dB impedance bandwidth for the proposed antenna is 34.6% and the 3-dB axial ratio (AR) bandwidth is 6.8% with a peak gain of 3.91 dBi in the desired operating band. Good agreement between the simulated and the measured results verifies the performance of the proposed antenna.
机译:在本文中,提出了一种用于WiMAX(3.5GHz)带的电磁带隙(EBG)质量表面(MS)超晶的圆极化天线。 所提出的结构包括一个2×2槽加载的矩形贴片MS阵列,其可以被认为是偏振依赖性的EBG MS超级替代。 此外,为了实现圆极化,所提出的天线具有倾斜的耦合槽,其具有传统的共面波导馈线。 所提出的天线具有紧凑的结构,具有0.037λ(0)的低轮廓(Lambda(0)代表自由空间波长为3.48GHz),接地尺寸为30×30mm(2)。 测量结果表明,所提出的天线的-10 dB阻抗带宽为34.6%,3-dB轴向比(AR)带宽为6.8%,在所需的操作带中的峰值增益为3.91dBi。 模拟和测量结果之间的良好一致性验证了所提出的天线的性能。

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