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提出了一种新型波导口单脉冲天线阵设计,分别给出了驻波曲线和辐射方向图的测试结果。该天线辐射单元采用呈90°结构的小型化波导口形式,通过底部的馈电倾斜缝馈电实现阵面的锥削分布要求,克服了传统波导缝隙天线设计复杂及对加工精度要求高的缺点,实现较为简单。采用理论与实验相结合的方法分析了测试结果与仿真结果差距较大的问题,去除了较为敏感的短路块结构,综合考虑工程可实现性及电性能两个方面,对辐射单元进行了二次优化设计并完成了天线实物加工。实验结果表明,该天线具有2.7%的带宽(驻波不大于2),-20 d B副瓣性能和45%的辐射效率,实现了与传统波导天线相当的单脉冲性能,为波导天线设计提供了一种新的方法,在弹载星载领域具有较广泛的工程应用前景。
A new design of waveguide monopulse antenna array is proposed. The test results of the standing wave curve and the radiation pattern are given respectively. The antenna radiating unit adopts a miniaturized waveguide with a 90 ° structure to overcome the traditional design of the waveguide slot antenna with high requirement on the machining precision by the power supply of the oblique feed slot at the bottom to achieve the cone distribution requirement. , To achieve more simple. The method of combining theory with experiment is used to analyze the problem that the test result is greatly different from the simulation result. The sensitive short-circuit block structure is removed. Considering the project realizability and electrical performance, Optimized design and completed the antenna processing. Experimental results show that the antenna has 2.7% bandwidth (standing wave is less than 2), - 20 d B sidelobe performance and 45% radiation efficiency, and achieves single pulse performance equivalent to that of the traditional waveguide antenna, providing the design of the waveguide antenna A new method has a wider range of engineering application prospects in the on-board spaceborne field.