CMA-Based Metasurface-Based Circularly Polarized Patch Antenna for SATCOM Applications

2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) Pub Date : 2023-05-09 DOI:10.1109/ECTI-CON58255.2023.10153139

N. Supreeyatitikul, T. Lertwiriyaprapa, C. Phongcharoenpanich

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Abstract

This paper proposes the metasurface (MTS)based circularly polarized (CP) stacked-patch antenna for satellite wireless communications. The characteristic mode analysis (CMA) was utilized to characterize the antenna configuration. The proposed antenna consisted of three-layer FR-4 substrates. The upper-layer substrate contained cross-shaped structure of a periodic MTS unit cells. The middle- and lower-layer substrates consisted of cross-slot ground plane and sequentially-rotated microstrip feed line, respectively. The cross-shaped structure of MTS unit cells evolved from the 4 $\times$ 4 periodic square-shaped conventional MTS unit cells for impedance bandwidth improvement. Besides, the cross-slot ground plane with sequentially-rotated microstrip feed line generated the two orthogonal modes at 5 GHz and 5.3 GHz for CP radiation. The simulated IBW and ARBW at 5 GHz (center frequency) were 29.8% (4.8-6.29 GHz) and 12% (4.8-5.4 GHz). The maximum gain at 5.4 GHz was 5.8 dBic. The radiation characteristic was left-hand circular polarization.

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卫星通信中基于cma的超表面圆极化贴片天线

提出了一种用于卫星无线通信的基于超表面(MTS)的圆极化(CP)叠片天线。利用特征模态分析(CMA)对天线结构进行了表征。提出的天线由三层FR-4基板组成。上层衬底含有十字形结构的周期性MTS单元电池。中下层基板分别由交叉槽接平面和顺序旋转微带馈线组成。为了提高阻抗带宽，MTS单元电池的十字结构是由4 $\ × $ 4周期性方形传统MTS单元电池演变而来的。微带馈线序转的交叉槽接平面产生了5 GHz和5.3 GHz两个正交模式的CP辐射。5 GHz(中心频率)下的IBW和ARBW分别为29.8% (4.8 ~ 6.29 GHz)和12% (4.8 ~ 5.4 GHz)。5.4 GHz时的最大增益为5.8 dBic。辐射特征为左旋圆偏振。

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2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)

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