论文名称为“Dual-Band Shared-Aperture High-Efficiency Reflectarray Antenna Based on Structure-Reuse Technique”。该论文通过结构融合技术，用低频单元替代高频单元的一对金属壁，在不改变反射阵口径面拓扑的前提下，完成了大频率比的双频反射单元的拓扑布局，实现了双频带反射阵天线的高口径利用效率；同时，反射单元具有较好的互耦抑制能力，能够实现良好的相位补偿能力。因此，提出的双频共口径反射阵天线能够实现天线高的辐射效率。该双频带反射阵天线在低频18GHz的最大增益为28.7dBi，对应的口径效率为43.59%；在高频38GHz的最大增益为35.8dBi，对应的口径效率为50.12%，天线的口径效率明显优于同类天线。该方法在毫米波大频比的双频带反射阵天线设计中具有较好的应用潜力。工作主要完成人为刘彦，程钰间，赵明华，樊勇。论文链接： https://ieeexplore.ieee.org/document/9317774

Abstract—A millimeter-wave dual-band shared-aperture high efficiency reflectarray antenna (RA) based on the structure-reuse technique is proposed in this letter, which consists of two sets of elements with full 360° phase compensation ranges. The oblique dipole element excited by the substrate integrated waveguide (SIW) is employed for the lower frequency band. The equivalent metallic waveguide element with the unchanged periodic grid and transverse size is selected for the higher frequency band. To make full use of the radiating aperture and, then, improve the aperture efficiency of the dual-band RA, the SIW-fed dipole cells are used to replace a pair of symmetry walls of the metallic waveguide cell in the x-polarization direction. The measured gains of the proposed RA are 28.7 dBi with the aperture efficiency of 43.59% at 18 GHz and 35.8 dBi with the efficiency of 50.12% at 38 GHz. The simulated and measured results successfully validate the effectiveness of the proposed method in the design of a millimeter-wave dual-band shared-aperture RA.

Index Terms—Dual-band, reflectarray antenna (RA), sharedaperture, structure reuse.