Title :
Broadband Sub-Wavelength Profile High-Gain Antennas Based on Multi-Layer Metasurfaces
Author :
Konstantinidis, Konstantinos ; Feresidis, Alexandros P. ; Hall, Peter S.
Author_Institution :
Sch. of Electron., Electr. & Syst. Eng., Univ. of Birmingham, Birmingham, UK
Abstract :
A method for designing sub-wavelength-profile and broadband high-gain planar antennas is presented. A novel multi-layer periodic array design is proposed for sub-wavelength Fabry-Perot cavity type antennas with enhanced bandwidth performance. Three double-sided periodic arrays are designed and optimized, each double-sided array consisting of a capacitive artificial impedance surface (AIS) and an inductive partially reflective surface (PRS) printed on either side of a dielectric substrate. They are placed at about sixth of a wavelength from a ground plane and from each other. Thus, three air cavities are created with a total profile of λ/2. The proposed antenna has been simulated using CST Microwave Studio and measured achieving 16.9 dBi directivity with 10.7% 3 dB bandwidth. The gain-bandwidth product of the proposed designs outperforms any previous Fabry-Perot antenna design with this profile.
Keywords :
broadband antennas; dielectric materials; metamaterial antennas; planar antenna arrays; CST Microwave Studio; Fabry-Perot antenna design; air cavities; broadband high-gain planar antennas; broadband subwavelength prolile high-gain antennas; capacitive artilicial impedance surface; dielectric substrate; directivity; double-sided array; inductive partially reflective surface; metamaterial based structures; multilayer metasurfaces; multilayer periodic array design; subwavelength Fabry-Perot cavity type antennas; subwavelength-prolile; Antenna measurements; Arrays; Bandwidth; Broadband antennas; Cavity resonators; Reflection; Artificial impedance surface; Fabry-Perot cavity; leaky-wave antennas; partially reflective surfaces;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2365825
