Mohamad Hossein Anjomshoa, Seyed Ali Razavi Parizi
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引用次数: 0
摘要
在设计号角阵列天线时，通常会遇到光栅叶问题，因此孔径效率相当低。本文提出了一种新的号角阵列天线配置，它具有较高的孔径效率，同时抑制了 E& H 平面辐射模式中的光栅叶。所提出的阵列单元是一个双模喇叭，在 E 平面上有两个波纹。设计了一个 4 ⨯ 4 阵列样品，用于在 Ku 波段工作。仿真和测量结果表明，工作带宽为 13.3%，其上的光栅裂片被完全抑制，孔径效率高于 70%。天线测量增益也是 27 dBi，带宽变化 2 dB。结果表明，利用所提出的拓扑结构，可以实现 98% 的孔径效率。
Horn array antenna with high aperture efficiency and suppressed grating lobes
In the design of horn array antennas, usually there is a challenge with the grating lobe problem and consequently quite low aperture efficiency. A new configuration for horn array antennas is presented which introduces high aperture efficiency with suppressed grating lobes in both E-& H-plane radiation patterns. The proposed array unit cell is a dual-mode horn loaded by two corrugations in E-plane. A sample 4 ⨯ 4 array of the proposed unit cell is designed to operate at Ku band. The simulation and measurement results show 13.3% operating bandwidth over which the grating lobes are totally suppressed and the aperture efficiency is above 70%. The antenna measured gain is also 27 dBi with 2 dB variation over the bandwidth. The results show that the aperture efficiency of 98% is achievable making use of the proposed topology.
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