Title :
Errors in near-field radioholography
Author_Institution :
Raman Res. Inst., Bangalore
fDate :
6/1/2007 12:00:00 AM
Abstract :
Formulae are given for the aperture plane phase errors which are incurred in near-field radioholography of reflector antennas when a simple Fresnel correction is used. Approximate analytic expressions are derived for circular data windows and antennas with parabolic illumination taper. Infocus and defocused cases are treated. Numerical simulations are used for estimating errors for square data windows
Keywords :
Fresnel diffraction; antenna radiation patterns; aperture antennas; microwave holography; numerical analysis; reflector antennas; Fresnel correction; aperture plane phase error; circular data windows; near-field radioholography error; numerical simulation; parabolic illumination taper; reflector antennas; square data windows;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map:20060061
