Title :
Focusing Properties of Fresnel Zone Plate Lens Antennas in the Near-Field Region
Author :
Karimkashi, Shaya ; Kishk, Ahmed A.
Author_Institution :
Dept. of Electr. Eng., Univ. of Mississippi, Oxford, MS, USA
fDate :
5/1/2011 12:00:00 AM
Abstract :
Some focusing properties of Fresnel zone plate (FZP) lens antennas in the near-field region are presented at the ka-band. Simulated and measured results of the FZP antenna show displacement of the maximum intensity of the electric field along the axial direction from the focal point toward the antenna aperture. This displacement increases as the antenna´s focal length increases. In addition, the focused beam scanning of the FZP lens antennas in the radiation near-field is examined.
Keywords :
antenna radiation patterns; aperture antennas; lens antennas; optical focusing; zone plates; FZP lens antenna; Fresnel zone plate lens antenna; antenna aperture; antenna focal length; electric field; focal point; focused beam scanning; focusing property; ka-band; maximum intensity displacement; near-field region; radiation near-field; Antenna measurements; Aperture antennas; Electric fields; Electric variables measurement; Lenses; Focusing; Fresnel zone plate lenses; near fields;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2123069
