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利用不同厚度的亚波长介质块实现0~2π的相位变化,并基于惠更斯人工电磁表面原理设计了工作于28 GHz通信频段的全介质电磁透镜,该电磁透镜的焦距与口径比(F/D)为0.15。通过3D打印制备该电磁透镜,并将其与基片集成波导(SIW)贴片天线进行集成,构造了超低剖面的宽带透镜天线。全波分析与实验测量结果显示该电磁透镜能够将原SIW贴片天线的增益提高7 d B左右,而将3 d B波束宽度减小到10°左右,同时该透镜天线系统还具有良好的低副瓣。
The phase change of 0 ~ 2π is realized by using different subwavelength dielectric blocks of different thicknesses. Based on the Huygens artificial electromagnetic surface principle, an all - dielectric electromagnetic lens operating at 28 GHz frequency band is designed. The focal length to aperture ratio of the electromagnetic lens (F / D) is 0.15. The electromagnetic lens was prepared by 3D printing and integrated with a chip integrated waveguide (SIW) patch antenna to construct an ultra-low profile broadband lens antenna. Full-wave analysis and experimental measurements show that the electromagnetic lens can increase the gain of the original SIW patch antenna by about 7 dB while reducing the beamwidth of 3 dB to about 10 °, and at the same time the lens antenna system has good low Sidelobes.