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采用背腔缝隙耦合贴片天线的高效高增益低旁瓣电平及倾斜极化单脉冲天线。

High efficiency high gain low side lobe level and slant polarization monopulse antenna using cavity backed slot coupled patch antenna.

作者信息

Hamidi Seyed Mohammad, Razavi Seyed Mohammad Javad, Armaki Seyed Hossein Mohseni

机构信息

Faculty of Electric and Computer, Malek Ashtar University of Technology, Tehran, Iran.

出版信息

Sci Rep. 2025 Jan 14;15(1):1940. doi: 10.1038/s41598-025-86225-2.

DOI:10.1038/s41598-025-86225-2
PMID:39809852
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11733304/
Abstract

In this paper, a multilayer monopulse antenna at Ku-Band with high efficiency, high power handling capability, high gain, 45° linear polarization and low sidelobe is presented. A new slot antenna is proposed as a radiating element based on a cavity-backed slot-coupled patch antenna. Using an enclosed cavity structure reduces coupling between antenna elements, thus increasing the antenna efficiency. The sub-array antenna has been designed to reduce the feed network complexity. A cavity power divider and feeding slots are inserted between the layers of the sub-array to compact it. An innovative feeding network has been designed with two-dimensional Chebyshev distribution. The simulated impedance bandwidth is 11%. The peak gain is 38.4 dBi and the sidelobe level of lower than 18 dB with a half-power beamwidth of approximately 2.4° for sum patterns at the center frequency and efficiency is more than 86% across the bandwidth. The maximum value of null depth for the difference patterns is - 38 dB. The radiation patterns have good symmetry in both E- and H-planes. The simulation results are compared with the results obtained from the built part of the antenna. the measurements results are in good agreement with the simulation.

摘要

本文介绍了一种Ku波段多层单脉冲天线，该天线具有高效率、高功率处理能力、高增益、45°线极化和低旁瓣等特性。基于背腔式缝隙耦合贴片天线，提出了一种新型缝隙天线作为辐射单元。采用封闭腔体结构可减少天线单元之间的耦合，从而提高天线效率。子阵天线的设计旨在降低馈电网络的复杂度。在子阵各层之间插入腔体功率分配器和馈电缝隙以使其紧凑。采用二维切比雪夫分布设计了一种创新的馈电网络。模拟阻抗带宽为11%。在中心频率处，和方向图的峰值增益为38.4 dBi，旁瓣电平低于18 dB，半功率波束宽度约为2.4°，带宽内效率超过86%。差方向图的零深最大值为-38 dB。辐射方向图在E面和H面均具有良好的对称性。将仿真结果与天线制作部分的测量结果进行了比较，测量结果与仿真结果吻合良好。

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