ABSTRACT A 2D multibeam array antenna without beamforming network is proposed in this paper. The antenna can radiate nine beams pointing to different directions in 2D space. By etching nine U-shaped slots on the ground plane, −10-dB impedance bandwidth is improved and beam inclination angles are enlarged. The measured results show that the antenna has a −10-dB impedance bandwidth of 7.5% (from 8.16 to 8.8 GHz). The inclination angles of the scanning beams are about ±36° (in the planes of φ = 0°, 45°, and −45°) and ±30° (in the plane of φ = 90°).

中文翻译：

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无波束成形网络的二维大波束倾角多波束阵列天线

摘要 本文提出了一种无波束成形网络的二维多波束阵列天线。天线可以在二维空间中辐射指向不同方向的九个波束。通过在接地平面上蚀刻九个 U 形槽，-10-dB 阻抗带宽得到改善，波束倾角扩大。测量结果表明，天线的 -10-dB 阻抗带宽为 7.5%（从 8.16 到 8.8 GHz）。扫描光束的倾角约为±36°（在φ=0°、45°和-45°的平面内）和±30°（在φ=90°的平面内）。