基于透射阵的宽带低剖面双向2D波束扫描天线  

Wideband Low Profile Bidirectional 2D Beam Scanning Antenna Based on Transmitarray

作　　者：翟振钧 林峰 孙厚军[1] ZHAI Zhenjun;LIN Feng;SUN Houjun(Beijing Institute of Technology,School of Integrated Circuits and Electronics,Beijing 100081,China)

机构地区：[1]北京理工大学集成电路与电子学院,北京100081

出　　处：《微波学报》2024年第S1期64-67,共4页Journal of Microwaves

摘　　要：本文提出一种毫米波宽带低剖面双向辐射2D波束扫描天线。该天线通过两个在空间上重叠的正交镜像折叠透射阵实现独立控制的双向辐射波束,显著降低了天线剖面。每个折叠透射阵由馈源、曲面极化器和收发阵列组成。收发阵列单元包括两个宽带蝶形偶极子天线和一对具有真时延和连续360°移相范围的差分微带线移相器。通过沿x或y方向移动极化器,该天线可实现在整个工作频带内具有恒定波束方向的2D波束扫描。该天线的高度直径比(H/D)为0.5。在27-39 GHz范围内,双向波束测试扫描范围在E面和H面均覆盖±10°,最大扫描损耗为1.9 dB。最大增益测试结果为27.1 dBi,最大口径效率为53.4%。This article presents a millimeter-wave wideband low-profile bidirectional 2-D beam-scanning antenna.It achieves independently controlled bidirectional beams by two orthogonally mirrored folded transmitarrays(TAs)overlapping in space,significantly reducing the antenna profile.The folded TA consists of a feed source,a curved polarizer,and a receive–transmit(R-T)array.The R-T array element is realized by two wideband bow-tie dipole antennas connected by a pair of differential microstrip-line phase shifters with true-time delay and continuous 360◦tuning range.Finally,2-D beam scanning with constant beam direction across the operation band is achieved by adjusting the polarizer along the xand y-directions.The height diameter ratio(H/D)is 0.5,while the measured 2-D bidirectional beam scanning range covers±10◦in both the E-and H-planes within 27–39 GHz,with a maximum scan loss of 1.9 dB.The measured peak gain is 27.1 dBi,and the maximum aperture efficiency is 53.4%.

关 键 词：二维波束扫描 增材制造电子(AME) 双向辐射天线 折叠透射阵 毫米波 宽带 

分 类 号：TN820[电子电信—信息与通信工程]