This paper proposes a circularly polarized 2 × 2 antenna array for C-band wireless applications. The most attractive feature of the proposed design is that it is only fabricated on a single layer of a dielectric substrate, while maintaining wideband operation and high gain radiation as well. The single-layer design is able to significant reduce the antenna’s complexity. The array element is based on a truncated corner patch and a periodic structure. The final prototype of 2 × 2 antenna array with overall dimensions of 1.2λ × 1.2λ × 0.04λ, where λ is the lowest operating frequency, was fabricated and experimentally validated. The proposed array yields a measured impedance bandwidth of 42.9% (4.4–6.8 GHz) and a measured 3-dB axial ratio bandwidth of 36.4% (4.5–6.5 GHz). Within the operating band, good radiation patterns are achieved and the boresight gain is from 9.5 to 11.5 dBic. Compared with the other reported single-layer sequential-fed antenna arrays in literature, the proposed shows the best operating bandwidth with competitive gain radiation.

本文提出了一种用于C波段无线应用的圆极化2×2天线阵列。所提出设计的最吸引人的特征是，它仅在介电基板的单层上制造，同时还保持宽带工作和高增益辐射。单层设计能够显着降低天线的复杂性。数组元素基于截断的角点和周期性结构。2×2的天线阵列的最终原型用1.2的整体尺寸λ  ×1.2 λ  ×0.04 λ，其中λ是最低的工作频率，是经过制造和实验验证的。拟议的阵列产生的测得阻抗带宽为42.9％（4.4–6.8 GHz），测得的3-dB轴向比率带宽为36.4％（4.5–6.5 GHz）。在工作频带内，可获得良好的辐射图，视轴增益为9.5至11.5 dBic。与文献中其他报道的单层顺序馈电天线阵列相比，该建议书显示了具有竞争性增益辐射的最佳工作带宽。