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A physical optics based near-field analysis method for the design of dual polarized fan beam shaped reflector antennas
, Article AEU - International Journal of Electronics and Communications ; Volume 70, Issue 2 , 2016 , Pages 132-137 ; 14348411 (ISSN) ; Mohammadpour Aghdam, K ; Ahmadi Boroujeni, M ; Arbabi, E ; Nemati, M ; Sharif University of Technology
Elsevier GmbH
Abstract
Using a physical optics based near-field method, we have proposed a hierarchy procedure for the design of dual polarized doubly curved reflectors. Using equivalent magnetic and electric currents at the aperture of the feed antenna and employing free space dyadic Green's functions, an optimization was performed for the design of a fan beam shaped reflector, needless of any far-field approximation. The designed antenna has been fabricated and measured. The measurement data proves the effectiveness of method and shows a good agreement with simulated results
Parallel-plates-based dirac leaky wave antennas
, Article IET Microwaves, Antennas and Propagation ; Volume 15, Issue 15 , 2021 , Pages 1877-1890 ; 17518725 (ISSN) ; Memarian, M ; Ahmadian, M ; Sharif University of Technology
John Wiley and Sons Inc
2021
Abstract
In this work, the authors experimentally show Dirac Leaky Wave Antennas (DLWAs) at upper microwave frequencies. For the first time, DLWAs are implemented using simple Parallel plate waveguide (PPW) technology, while yielding desirable radiation features and continuous beam scanning through broadside, as well as extremely low profile, with significant ease of fabrication, making them well suited for Ku band applications such as satellite communication, radar and emerging fifth-generation (5G). A planar Dirac photonic crystal in PPW is shown with a closed bandgap and linear dispersion around broadside. In this work, 1D and 2D PPDLWAs are designed that provide scannable fan and pencil beams,...