A compact substrate‐integrated‐waveguide (SIW) monopulse slot antenna array with T_E20 mode is proposed, manufactured, and tested in this communication. The TE₂₀ mode electric field distribution is used in this antenna design. The phase difference required by the monopulse system is constructed by changing the orientation of the end of the top microstrip feed line. The microstrip line implements not only the feed function, but also the function of a monopulse comparator. The design greatly reduces the size of the monopulse comparator and the feed network, and improves the aperture efficiency of the antenna. Our measurement shows that the operating frequency of the antenna is 10.4 GHz, and the maximum gain of the sum beam is 13.7 dBi, and the difference beam null depth is −26 dB. The antenna has the advantages of simple structure, small size, and easy integration of planar circuits. This proposed idea can open new ways for monopulse antenna design.

中文翻译：

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TE20模式的紧凑型基片集成波导单脉冲缝隙天线阵列

在此通信中，提出，制造并测试了具有T _E20模式的紧凑型基板集成波导（SIW）单脉冲缝隙天线阵列。TE ₂₀天线设计中使用了模态电场分布。通过更改顶部微带馈线末端的方向来构造单脉冲系统所需的相位差。微带线不仅实现馈电功能，而且还实现单脉冲比较器的功能。该设计极大地减小了单脉冲比较器和馈电网络的尺寸，并提高了天线的孔径效率。我们的测量结果表明，天线的工作频率为10.4 GHz，总和波束的最大增益为13.7 dBi，差分波束零点深度为-26 dB。该天线具有结构简单，尺寸小和易于集成平面电路的优点。提出的想法可以为单脉冲天线设计开辟新的途径。