论文名称为“Two-Dimensional Near-Field Focusing Folded Reversely Fed Leaky-Wave Antenna Array With High Radiation Efficiency”。该文通过一种折叠反向馈电的漏波天线阵实现了天然平衡的辐射分布。同时，该反向馈电结构可以使相邻单根漏波天线在宽度上获得互补的特点。在此基础上，通过采用宽度阶跃的基片集成波导以获得准均匀的缝隙分布以避免杂散辐射的产生。进一步，将所有反向馈电的漏波线阵首尾相连来简化整个馈电网络和提高辐射效率，来打破近场聚焦漏波天线的辐射限制。该天线的设计原则和过程在文章进行了详细介绍。工作主要完成人吴亚飞、程钰间。论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8668805

Abstract—— This paper presents a 2-D near-field focusing (NFF) substrate-integrated-waveguide (SIW) leaky-wave antenna (LWA) array with high radiation efficiency. In most of the existing 2-D NFF antenna arrays, the required quadratic phase and balanced amplitude distribution are achieved by the use of the transverse topology with a complex feeding network or the simple radial topology with high polarization loss. Here, a folded reversely fed LWA with transverse polarization is proposed to achieve natural balanced radiation with a sample series-fed network. Meanwhile, the width of the single linear LWA is complementary with the reversely fed topology. In this case, the SIW with a stepped width is applied to achieve a quasi-uniform slot distribution and to avoid the spurious radiation. Then, all reversely fed linear LWAs are connected by the meander-line structure, which can simplify the feeding network and enhance the radiation efficiency. The limitation of the NFF LWA in radiation efficiency is broken. The 2-D focusing principle and the design process of the proposed antenna are presented in this paper. As an example, a 2-D focusing SIW LWA array operated at 35 GHz with an 80% radiation efficiency is fabricated and measured.

 Index Terms—High radiation efficiency, leaky-wave antenna (LWA), meander-line structure, 2-D near-field focusing (NFF), width-stepped substrate-integrated waveguide (SIW).