Title :
A high-gain lens antenna based on transformation optics
Author :
Aghanejad, I. ; Abiri, Habibollah ; Yahaghi, Alireza ; Ramezani, Reza
Author_Institution :
Sch. of Electr. & Comput. Eng., Shiraz Univ., Shiraz, Iran
Abstract :
Transformation of space coordinates can be used as a convenient tool for producing a controlled electromagnetic field pattern. In this paper, we apply a quasi-conformal coordinate transformation to a Maxwell fish-eye lens to design a lens antenna with high gain and low sidelobes, which can be realized by isotropic graded refractive index (GRIN) materials. Using proper simplifying techniques, the designed lens can be made by non-resonant metamaterials or non-magnetic dielectrics having wide frequency band and low losses. The simulation results validate the advantages of the proposed lens antenna.
Keywords :
dielectric materials; lens antennas; metamaterial antennas; refractive index; GRIN material; Maxwell fish-eye lens; antenna sidelobe; electromagnetic field pattern; high-gain lens antenna; isotropic graded refractive index; lens antenna design; nonmagnetic dielectrics; nonresonant metamaterial; quasiconformal coordinate transformation; space coordinates; transformation optics; Dispersion; Horn antennas; Lenses; Metamaterials; gradient-index metamaterials; lens antenna; transformation optics;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2012 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4673-2218-8
Electronic_ISBN :
978-1-4673-2219-5
DOI :
10.1109/LAPC.2012.6402990
