Title :
Multi-layer sub-wavelength profile broadband leaky-wave antenna
Author :
Konstantinidis, Konstantinos ; Feresidis, Alexandros P. ; Gardner, Peter ; Hall, Peter S.
Author_Institution :
Sch. of Electron., Electr. & Comput. Eng., Univ. of Birmingham, Birmingham, UK
Abstract :
A new concept for designing subwavelength-profile and broadband high-gain leaky-wave antennas is introduced. A novel multi-layer periodic array design is proposed for subwavelength Fabry-Perot leaky-wave antennas with enhanced bandwidth performance. Two double-layer periodic arrays of dissimilar dimensions are designed and optimized, each double-layer array consisting of an Artificial Magnetic Conductor (AMC) and a Partially Reflective Surface (PRS) printed on either side of a dielectric substrate. They are placed at about quarter wavelength from a ground plane and from each other. Thus, two air cavities are created with a total profile of less than λ/2. The proposed antenna has been simulated (using CST Microwave Studio™) achieving 18.3dBi directivity with 8% bandwidth. This gain-bandwidth product outperforms any previous Fabry-Perot antenna design with this profile.
Keywords :
antenna arrays; broadband antennas; conductors (electric); electrical engineering computing; leaky wave antennas; substrate integrated waveguides; CST Microwave Studio; artificial magnetic conductor; bandwidth performance enhancement; broadband high-gain leaky-wave antennas; dielectric substrate; dissimilar dimensions; double-layer periodic arrays; gain-bandwidth product; multilayer periodic array design; multilayer subwavelength profile broadband leaky-wave antenna; partially reflective surface; subwavelength Fabry-Perot leaky-wave antennas; Arrays; Bandwidth; Cavity resonators; Dipole antennas; Optical surface waves; Reflection; Artificial magnetic conductor; Fabry-Perot cavity; Leaky-wave antennas; Partially reflective surfaces;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986579
