论文名称为“Millimeter-wave near-field-focused full 2-D frequency scanning antenna array with height-modulated-ridge waveguide”。 论文设计了一款工作在毫米波频段的近场聚焦全二维频扫天线阵。通过脊波导近场聚焦漏波天线与不等长的聚焦渐进移相网络的结合实现了焦点的二维频扫。渐进移相网络随频率改变产生的相移远远大于漏波天线自身产生的相移。进而，当频率发生改变时，脊波导调制近场聚焦漏波天线自身固有的频率扫描特性会在一个维度产生焦点单次扫描，同时聚焦渐进移相网络（Focused Progressive Phase Shifting Network）会在另一个维度提供一个焦点周期性多重快速扫描。 最终，通过频率的改变可以实现对整个二维平面的焦点扫描全覆盖。天线只需在单端口馈入具有一定带宽的信号，可以完成对整个扫描面上的探测。通过频域信息便可以直接反演出二维探测面上的信息，其可以避免复杂的成像算法。工作主要完成人为吴亚飞，程钰间、姚仕森、樊勇。

论文链接： https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9298465&tag=1

Abstract— A millimeter-wave near-field-focused (NFF) full 2-D frequency-scanning antenna array is presented in this article. The proposed antenna is achieved by combining an NFF ridged-waveguide slot array with a double-layer folded focused progressive feeding network. The linear ridged-waveguide slot array antenna is designed with a height-modulated ridge to focus on the power in one direction. The folded feeding line with different length is used to generate the desired focused phase and frequency-dependent progressive phase shift in the other direction. In this case, as the working frequency is swept in the considered range, the inherent frequency-dependent behavior of the linear NFF leaky-wave antenna (LWA) allows a single-scanning sweep in one direction, whereas the focused progressive feeding network ensures multiple-scanning sweeps in the other direction. A full 2-D electronic scanning with no coverage blindness in the scanning area is achieved. To the best of our knowledge, the proposed NFF antenna array is the first design to achieve the full 2-D scanning focus in the near-field (NF) region only by sweeping the frequency, which means that the testing information in the NF region can be directly obtained with a certain band of frequency. This type of antenna is a good candidate in NF fast-scanning applications, e.g., electromagnetic imaging/detecting systems.

Index Terms— 2-D frequency scanning, focused progressive feeding network, leaky-wave antenna (LWA), nearfield-focused (NFF), ridged waveguide.