A dual-resonance wideband full-metal cavity-backed slot antenna array (CBSA) with high efficiency is proposed. A cavity mode and a resonant-iris mode are used to produce a wide impedance bandwidth. Radiation slots (elements) placed on the top wall are directly fed by electric fields of the modes using a single feeding slot without extra structures. This simplified feeding structure can reduce the antenna complexity, and can also improve the radiation efficiency by reducing power loss along with the conventional feeding power dividers. Thereafter, two wideband and high-efficiency slot arrays with 2 × 2 and 4 × 4 elements are designed based on these two cavity modes and proposed a simplified feeding structure. The measurement of 2 × 2 slot array shows that the proposed 2 × 2 slot antenna array can achieve 15% bandwidth, 13.4 dBi peak gain, and 95% total efficiency.

中文翻译：

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高效宽带双谐振全金属腔背隙缝天线阵列

提出了一种高效率的双谐振宽带全金属腔背缝隙天线阵列（CBSA）。腔模式和谐振虹膜模式用于产生宽阻抗带宽。放置在顶壁上的辐射槽（元件）使用单个馈电槽直接由模式的电场馈电，无需额外的结构。这种简化的馈电结构可以降低天线的复杂度，并且与传统的馈电功率分配器相比，还可以通过减少功率损耗来提高辐射效率。 .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 此后，基于这两种腔模设计了两个具有2×2和4×4元件的宽带高效缝隙阵列，并提出了一种简化的馈电结构。2×2缝隙阵列的测量表明，所提出的2×2缝隙天线阵列可以实现15%的带宽，13.4 dBi的峰值增益，