Gain improvement of conformal circularly polarized Fabry-Perot resonator antenna based on metasurface

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2024-10-02 DOI:10.1016/j.aeue.2024.155552

Peng Xie, Yao Liu, Xiaolin Zhao, Boxin Zhao

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引用次数: 0

Abstract

Conformal antenna can keep consistent with the shape of the carrier perfectly, which greatly saves the space of the carrier, so it is widely used in military, aerospace and other fields. In this paper, a cylindrical conformal circular polarization Fabry-Perot resonator antenna is designed, and the adverse effect of conformal on antenna gain is overcome by transmission phase compensation. Firstly, a linear to circular polarization conversion metasurface with adjustable transmission phase is designed. The main reason for choosing the metasurface here is to take advantage of its excellent electromagnetic control ability. The metal structures of the metasurface are printed on the ultra-thin dielectric plates, and then attached to the support structure machined by 3D printing, so as to achieve the conformal design of the metasurface. Secondly, the proposed metasurface is used as the superstructure and is combined with a conformal feed to form a cylindrical conformal circularly polarized Fabry Perot resonator antenna. The conformal feed is a patch antenna which is conformal designed in the same way as the metasurface. The conformal feeder is placed under the conformal metasurface to ensure that the electromagnetic wave radiated by the feeder can enter the resonant cavity composed of the feeder and the metasurface. The curvature of the cylindrical conformal of feed and metasurface is the same, which can ensure the high unity of the different positions in the resonator. Next, by adjusting the transmission phase of the unit on the metaurface, the phase compensation of the transmitted electromagnetic wave is realized, so that the electromagnetic wave radiated by the conformal antenna still presents the characteristic of plane wave. Finally, the conformal Fabry-Perot resonator antenna obtains the same high-gain radiation characteristics as the planar resonator antenna. The designed antenna achieves a maximum gain of 13.1dBic at 10 GHz. The size of the antenna is 2.9λ × 2.9λ, so the aperture efficiency is about 19.9 %. The antenna proposed in this paper overcomes the influence of conformal design on the gain of the antenna, so that it can be conformal on the surface of a cylindrical object and obtain better gain characteristics.

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基于元表面的共形圆极化法布里-珀罗谐振器天线的增益改进

共形天线能与载体形状完美保持一致，大大节省了载体空间，因此被广泛应用于军事、航天等领域。本文设计了一种圆柱共形圆极化法布里-珀罗谐振器天线，并通过传输相位补偿克服了共形对天线增益的不利影响。首先，设计了一个传输相位可调的线性到圆极化转换元面。之所以选择元面，主要是为了利用其出色的电磁控制能力。元表面的金属结构被打印在超薄介质板上，然后附着在通过三维打印加工的支撑结构上，从而实现元表面的保形设计。其次，将所提出的元表面作为上层结构，并与共形馈线相结合，形成圆柱形共形圆极化法布里-佩罗谐振器天线。共形馈电是一种贴片天线，其共形设计与元表面相同。共形馈源置于共形元面之下，以确保馈源辐射的电磁波能够进入由馈源和元面组成的谐振腔。馈源和元面的圆柱保形曲率相同，可以确保谐振器中不同位置的高度统一。其次，通过调整元面上单元的传输相位，实现传输电磁波的相位补偿，使共形天线辐射的电磁波仍然呈现平面波的特性。最后，共形法布里-珀罗谐振器天线获得了与平面谐振器天线相同的高增益辐射特性。所设计的天线在 10 GHz 频率下实现了 13.1dBic 的最大增益。天线尺寸为 2.9λ × 2.9λ，因此孔径效率约为 19.9%。本文提出的天线克服了保形设计对天线增益的影响，因此可以在圆柱形物体表面保形，获得更好的增益特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.