论文名称为“Ku/Ka Dual-Band Dual-Polarized Shared-Aperture Beam-Scanning Antenna Array With High Isolation”。该工作基于结构复用概念，充分利用基片集成波导（SIW）的封闭特性，使SIW加载的偶极子天线既组成Ku波段低频阵列，又构成Ka波段高频矩形波导天线的四壁，从而实现双频共口径波束扫描阵设计。其利用波导的高通特性、天线极化隔离以及最优拓扑布局实现了两个频段天线间的高隔离度，采用结构复用使得该天线阵列布局不产生额外占用面积，天线单元间距均小于0.5λ，实现了一维大角度范围扫描。该天线设计解决了嵌套、镂空、交错、重叠等传统共口径方案难以同时满足天线高隔离度和大角度扫描的问题，在实现大角度波束扫描同时保证了天线间的高通道隔离度。主要完成人有丁嫣然、程钰间。论文链接：https://ieeexplore.ieee.org/document/8624566

Abstract—This paper describes the design and realization of a Ku/Ka dual-band shared-aperture beam-scanning antenna array based on the concept of structure reuse. The antenna consists of four Ku-band linear antenna arrays implemented by the substrate-integrated waveguide (SIW) and four Ka-band linear antenna arrays. To increase the aperture utilization efficiency, the Ku-band antenna is employed as some sidewalls of the Ka-band antenna. Thanks to this compact topology, the element spacing at two frequency bands is able to meet the requirement of a wideangle beam scan. Both feeding networks of these two arrays are designed by proper SIW power dividers through the printed circuit board fabrication process. In addition, the self-filtering characteristic of the antenna, the orthogonal polarization, and the optimal layout of the array are employed to ensure the high channel isolation between the two antennas operating at different frequency bands over the whole beam scan range. The isolation between antennas is better than 28 and 70 dB at the Ku-band and Ka-band, respectively, scanning up to even 40°. The proposed shared-aperture concept and the design results have been validated by the experimental results.

 Index Terms—Beam-scanning antenna array, dual-band share-aperture antenna, high channel isolation, structure reuse.