Title :
Non-Uniform Metasurface Luneburg Lens Antenna Design
Author :
Bosiljevac, Marko ; Casaletti, Massimiliano ; Caminita, Francesco ; Sipus, Zvonimir ; Maci, Stefano
Author_Institution :
Fac. of Electr. Eng. & Comput., Univ. of Zagreb, Zagreb, Croatia
Abstract :
A metasurfing concept is demonstrated and applied in the design of Luneburg lens antennas. Using an array of size-varying circular patches on a dielectric substrate inside a parallel-plate waveguide (PPW) structure variable surface impedance is obtained, which realizes an equivalent refraction index as that of a Luneburg lens. The obtained lens has good bandwidth characteristics and significant fabrication advantages with respect to conventional dielectric lenses. Based on this PPW lens, an H-plane antenna has been designed and simulated.
Keywords :
lens antennas; microstrip antennas; refractive index; surface impedance; waveguide antenna arrays; H-plane antenna; Luneburg lens antenna design; PPW lens; PPW structure variable surface impedance; bandwidth characteristics; dielectric lenses; dielectric substrate; equivalent refraction index; nonuniform metasurface Luneburg lens antenna design; parallel-plate waveguide structure; size-varying circular patches array; Dielectrics; Impedance; Lenses; Permittivity; Refractive index; Surface impedance; Surface waves; Directive antennas; Luneburg lens antennas; metamaterial surfaces; periodic surfaces;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2207047
