论文名称为“Generating and 2-D steering large depth-of-field beam by leaky-wave antenna array with a modified parabolic reflector”。本文基于全息相位分解法设计了一款工作在毫米波频段的近场聚束大景深无衍射波束二维扫描天线阵，由一个全息调制的 26×23 漏波天线阵和一个修正的基片集成波导抛物面反射器组成，共同集成在一个单层介质板上。该天线首次实现了无衍射波束的二维电扫：其中一个维度通过近场聚束的全息漏波天线的频率扫描实现，另一个维度通过修正的抛物面反射透镜多波束扫描实现。其中，修正的基片集成波导抛物面反射器包含有 5 个输入端口，26 个输出阵列端口和若干虚位端口。漏波天线线阵由宽度阶跃的基片集成波导构成，然后 26 根线阵在垂直方向排列组成二维面阵。每根线阵上包含 23 个缝隙单元，并与抛物面反射器的输出端口相连。抛物面反射器的输入端口被设计成扇形形状，以实现输出幅度的锥削分布。26×23 缝隙位置分布经过调制来生成无衍射波束所需的全息相位。最后，漏波天线的匹配端口和抛物面反射器的虚位端口用基片集成匹配负载来做匹配。该天线的设计方法和过程在文章中进行了详细介绍。工作主要完成人为吴亚飞，程钰间。

论文链接： https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8901987&tag=1

Abstract— A millimeter-wave substrate-integrated waveguide (SIW) antenna with the ability of generating 2-D steerable large depth-of-field beam is presented in this article. First, a transverse antenna topology feeding with the series- and the parallel-network is employed to generate the limited-diffractive beam with large depth of field to overcome the problem that the conventional radial generator cannot steer its beam electronically. The proposed antenna is achieved by combining a modulated leaky-wave slot array antenna with a modified multibeam SIW parabolic reflector. The modulated leaky-wave slot array with stepped-width is designed to able to steer the limited-diffractive beam in the horizontal dimension with the frequency, which validates the frequency scanning feasibility of the limited-diffractive beam. Then a modified SIW parabolic reflector with matching loads is used to feed the modulated leaky-wave SIW slot array antenna to generate multiple limited-diffractive beams in the vertical dimension. A large depth of field of about 43λ₀ is achieved of the central limited-diffractive beam. The measurements are in good agreement with the simulated results.

Index Terms— 2-D steering, large depth of field, leaky-wave antenna, limited-diffractive beam, parabolic reflector.