In this article, a wideband cavity-backed slot array antenna with high gain and high aperture efficiency is presented. A novel cavity-backed subarray is designed with compact size and applied to construct a 4 × 8 array. The array antenna is composed of two feeding layers and a radiating layer. The subarrays are placed on the top layer and SIW structure feeding network on the two layers below is used to feed them. The presented antenna is designed, fabricated and measured. The measured results reveal that the working bandwidth reaches up to 17.6%, ranging from 18.7 to 22.3 GHz with the peak gain of 19.5 dBi. Besides, the maximum aperture efficiency of 77.6% is calculated by employing measured gain and aperture size at 21.9 GHz. The presented array can be utilized as a receiving antenna in satellite communication systems.

中文翻译：

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具有高增益和高孔径效率的宽带背腔缝隙阵列

本文介绍了一种具有高增益和高孔径效率的宽带背腔缝隙阵列天线。一种新颖的背腔子阵列设计为具有紧凑的尺寸，并应用于构建 4 × 8 阵列。阵列天线由两个馈电层和一个辐射层组成。子阵列放置在顶层，下面两层的SIW结构馈电网络用于馈送它们。所提出的天线被设计、制造和测量。实测结果表明，工作带宽高达17.6%，范围为18.7~22.3 GHz，峰值增益为19.5 dBi。此外，77.6% 的最大孔径效率是通过在 21.9 GHz 下使用实测增益和孔径尺寸计算得出的。所提出的阵列可用作卫星通信系统中的接收天线。