2014/05/09 by Li Yuan, Li Hua Yuan, Wen Xuan Tang +3 · 18 citations
Engineering · Materials Science · #Acoustics #Advanced Antenna and Metasurface Technologies #Anechoic chamber #Anisotropy #Antenna (radio) #Antenna Design and Analysis #Beam (structure) #Beam diameter #Computer science #Directivity #Lens (geology) #Main lobe #Materials science #Metamaterial #Metamaterials and Metasurfaces Applications #Optics #Physics #Side lobe #Telecommunications #Transverse plane #Zero (linguistics)
paper · doi:10.1109/tap.2014.2322898
published in IEEE Transactions on Antennas and Propagation 62(8), 4135-4142 (IEEE Antennas & Propagation Society)
openalex publication_date 2014/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We propose, design, and experimentally demonstrate three-dimensional 3-D anisotropic zero-index lenses, which can improve the directivity of traditional antennas. We show that a 3-D anisotropic zero-index lens with εu → 0 is efficient to transverse magnetic (TM) modes and can decrease the beam width of the main lobe in the E-plane; while a 3-D anisotropic zero-index lens with μu → 0 is efficient to transverse electric (TE) modes and can reduce the beam width of the main lobe in the H-plane, in which u represents the propagating direction. If such two lenses are packed together, the directivity of both E- and H-planes is significantly improved. To verify this unique property, we design and fabricate four 3-D anisotropic zero-index lenses using metamaterials in the microwave frequency and perform the experiments in the anechoic chamber. Experimental results demonstrate that the beam widths of both E- and H-plane gain patterns are greatly reduced, which have good agreements to the full-wave simulations.