论文名称“基于超表面的超宽带低剖面宽角扫描相控阵天线”，为满足多功能电子系统对天线带宽、天线剖面和波束覆盖范围的需求，提出了一种工作在6~18 GHz的平面双极化低剖面宽角扫描相控阵天线. 首先，为了抑制由非平衡短路式巴伦引入的天线带内寄生谐振模式从而拓展天线带宽，在天线阵列中加入了由短路金属柱和印制金属盘构成的脊型结构；然后，设计了基于超表面的宽角扫描阻抗匹配层，以降低波束扫描时的反射损耗；此外，在该天线的介质层中设计了周期性分布的空气孔，以降低天线辐射体周围的有效介电常数，进而消除波束扫描时的表面波激励. 基于上述方法，利用多层印制电路板工艺，在保持天线低剖面特性的同时实现了超宽带宽角扫描性能. 仿真结果表明，该阵列在典型方位角φ=90°和φ=0°分别具备±75°和±60°的波束扫描能力，且阵列剖面高度小于3.52 mm. 为了验证该设计的正确性，制作了一个阵列规模为8×8的双极化天线样机并对其进行实验，实验结果与仿真结果吻合较好. 该天线具有超宽带、低剖面、宽角扫描特点，为多功能电子系统提供了一种新颖的天线阵结构.工作主要完成人：孙建旭，李杰超，张涛，程钰间。

论文链接：http://www.cjors.cn/cn/article/doi/10.12265/j.cjors.2022190?viewType=HTML

Abstract: To meet the requirement of antenna bandwidth, antenna profile and beam coverage for the multifunction electronic systems, a 6–18 GHz dual-polarized phased array antenna with planar, low-profile and wide-scanning performance is proposed. To suppress the parasitic resonant-modes in the operating band caused by the unbalanced and short-circuited balun and extend the bandwidth, the ridge-type structures consisting of the grounded post and the printed metal-plate are added into the array at first. Then, the electromagnetic meta-surface based wide-scanning impedance matching layer is designed to lower the reflection loss when scanning. Moreover, the dielectric layers of the proposed antenna are perforated periodically to reduce the effective permittivity around the radiators and eliminate the excitation of a surface wave when scanning. Based on the above methods, ultra-wideband and wide-scanning performance are achieved together with the low antenna profile using the multi-layer printed circuit board (PCB) process. The simulation results show that the array has the beam scanning capability of ±75° and ±60° respectively at the typical azimuth angle φ=90° and φ=0°, and the array profile height is less than 3.52 mm. To validate the correctness of this design, an 8×8 dual-polarized array is fabricated and measured. The measured and simulated results show a good agreement. This antenna achieves the ultra-wideband, low-profile and wide-scanning characteristics, as well as providing a novel antenna array structure for the multifunction electronic systems.

Index Terms—ultra-wideband antenna, phased array, meta-surface, dipole antenna, low-profile, wide-scanning.