A low‐profile planar phased array based on the hybrid‐mode patch technique is presented to achieve the goal of increasing the scanning angle. The array element antenna simultaneously operates at TM10 and TM20 modes of two rectangle patches. By adjusting the length of a slot etched on one patch, the far field of the two modes can be combined by a certain proportion, and thus the complementary beams realize wide‐beam radiation. Besides, in order to improve the array active reflection performance in a wide‐scan range, the slot technique is adopted to achieve the element miniaturization, and a grounded isolator is introduced to reduce the mutual coupling between the array elements. The proposed phased array shows a measured main‐beam coverage from −68° to +66° with its gain fluctuation and sidelobe levels lower than 1.5 and − 10 dB, respectively.

中文翻译：

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在TM10和TM20模式下工作的新型平面广角扫描相控阵

提出了一种基于混合模式补丁技术的低轮廓平面相控阵，以实现增加扫描角度的目的。阵列天线同时在两个矩形贴片的TM10和TM20模式下工作。通过调整刻在一个贴片上的缝隙的长度，可以将两种模式的远场按一定比例合并，从而使互补光束实现宽光束辐射。此外，为了提高阵列在宽扫描范围内的有源反射性能，采用缝隙技术实现了元件的小型化，并引入了接地隔离器以减少阵列元件之间的相互耦合。拟议的相控阵显示出在-68°至+ 66°范围内测得的主光束覆盖范围，其增益波动和旁瓣电平分别低于1.5和-10 dB。