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秦红梅, 盛丽丽, 罗玉梅, 等. 基于有源超表面的低剖面双波束偏转天线[J]. 桂林电子科技大学学报, 2024, 44(4): 372-379. DOI: 10.3969/1673-808X.2023138
引用本文: 秦红梅, 盛丽丽, 罗玉梅, 等. 基于有源超表面的低剖面双波束偏转天线[J]. 桂林电子科技大学学报, 2024, 44(4): 372-379. DOI: 10.3969/1673-808X.2023138
QIN Hongmei, SHENG Lili, LUO Yumei, et al. Low-profile dual-beam steering antenna based on active metasurface[J]. Journal of Guilin University of Electronic Technology, 2024, 44(4): 372-379. DOI: 10.3969/1673-808X.2023138
Citation: QIN Hongmei, SHENG Lili, LUO Yumei, et al. Low-profile dual-beam steering antenna based on active metasurface[J]. Journal of Guilin University of Electronic Technology, 2024, 44(4): 372-379. DOI: 10.3969/1673-808X.2023138

基于有源超表面的低剖面双波束偏转天线

Low-profile dual-beam steering antenna based on active metasurface

  • 摘要: 针对传统的波束控制天线剖面高、成本高以及馈电网络复杂的问题,提出了一种基于有源超表面的低剖面双波束偏转天线设计方案。天线由“E”型双波束馈源天线和“7×6”透射型超表面组成。基于电流反转机制,在每个超表面单元上集成2个PIN二极管,实现了1-bit相位分辨率。结合相位补偿定理与远场辐射公式,对超表面单元进行组阵编码,以实现波束调控的性能。该天线的剖面仅为0.162λ0,明显低于其他波束偏转天线。通过设计超表面的偏置网络,实现了天线的双波束偏转。为了验证该方案,对天线进行加工测试。实测结果表明,在工作频率5.47 GHz处,双波束的主辐射方向可分别从(ϴΦ)=(30°,45°)、(−30°,−41°)偏转到(ϴΦ)=(30°,−45°)、(−30°,41°),增益高于8.9 dBi,实测结果与仿真结果具有较好的一致性。所提出的波束控制天线架构为实现低剖面、可调控的多波束天线提供了一种候选方案。

     

    Abstract: Aiming at the problems of high profile, high cost and complex feed network of traditional beam steering antenna, a design scheme of low-profile dual beam steering antenna based on active metasurface is proposed. The antenna consists of “E” dual beam feeding antenna and “7×6” transmission metasurface. A 1-bit phase resolution is achieved by controlling two PIN diodes on each element based on the current reversal mechanism. Combining the phase compensation theorem and the far-field radiation formula, the metasurface unit is arrayed and encoded to achieve the performance of beam control. The profile of the proposed antenna is only 0.162λ0, which is significantly lower than other beam-steering metasurface antennas. The bias network of the metasurface is designed. The dual-beam steering of the antenna is realized. To verify the strategies, prototype of the antenna is fabricated and tested. And the measured results show that the dual-beam can be steered from (ϴ, Φ) = (30°, 45°), (−30°, −41°) to (ϴ, Φ) = (30°, −45°), (−30°, 41°) at the operating frequency of 5.47 GHz, and the gain is higher than 8.9 dBi. The measured results are in good agreement with the simulation results. The proposed beam control antenna architecture provides a candidate scheme for realizing low-profile and controllable multi-beam antenna.

     

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