Title :
Reconfigurable Fresnel-Zone-Plate-Shutter Antenna with Beam-Steering Capability
Author :
Petosa, A. ; Thirakoune, S. ; Ittipiboon, A.
Author_Institution :
Commun. Res. Centre Canada, Ottawa
Abstract :
A reconfigurable Fresnel-zone-plate (FZP) antenna, capable of dynamic beam scanning, is introduced. The FZP consists of a series of thin metal shutters, which discretize the antenna aperture into a number of reconfigurable transparent and opaque zones. The shutters are individually controlled to focus the beam at a desired location. Beam scanning of at least +40deg from broadside with a small degradation in gain is possible in one plane using this design. This paper examines the effects of zone discretization on the ideal radiation patterns using full-wave numerical modeling. These effects are then verified by the measurements of a prototype antenna designed at 23 GHz.
Keywords :
Fresnel diffraction; antenna radiation patterns; beam steering; zone plates; Fresnel zone plate shutter antenna; beam steering capability; dynamic beam scanning; full wave numerical modeling; prototype antenna; radiation patterns; zone discretization; Antenna measurements; Aperture antennas; Frequency; Fresnel reflection; Lenses; Microwave antennas; Phased arrays; Prototypes; Radar tracking; Satellite communication;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2007.4395294
