中国物理B ›› 2016, Vol. 25 ›› Issue (9): 94101-094101.doi: 10.1088/1674-1056/25/9/094101
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Tang-Jing Li(李唐景), Jian-Gang Liang(梁建刚), Hai-Peng Li(李海鹏), Ya-Qiao Liu(刘亚峤)
Tang-Jing Li(李唐景), Jian-Gang Liang(梁建刚), Hai-Peng Li(李海鹏), Ya-Qiao Liu(刘亚峤)
摘要: A new method to design an ultra-thin high-gain circularly-polarized antenna system with high efficiency is proposed based on the geometrical phase gradient metasurface (GPGM). With an accuracy control of the transmission phase and also the high transmission amplitude, the GPGM is capable of manipulating an electromagnetic wave arbitrarily. A focusing transmission lens working at Ku band is well optimized with the F/D of 0.32. A good focusing effect is demonstrated clearly by theoretical calculation and electromagnetic simulation. For further application, an ultra-thin single-layer transmissive lens antenna based on the proposed focusing metasurface operating at 13 GHz is implemented and launched by an original patch antenna from the perspective of high integration, simple structure, and low cost. Numerical and experimental results coincide well, indicating the advantages of the antenna system, such as a high gain of 17.6 dB, the axis ratio better than 2 dB, a high aperture efficiency of 41%, and also a simple fabrication process based on the convenient print circuit board technology. The good performance of the proposed antenna indicates promising applications in portable communication systems.
中图分类号: (Electromagnetic wave propagation; radiowave propagation)