By Topic

Phase centre of small primary feeds and its effects on the feed performance

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $33
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
L. Shafai ; University of Manitoba, Department of Electrical Engineering, Winnipeg, Canada ; A. A. Kishk

For small primary feeds the radiation field is determined numerically, using an integral-equation formulation for the surface currents and its solution by a moment method. The computed fields are used to determine the feed-phase centres, as defined to minimise the phase variation of the field over a selected angular region, or to maximise the reflector gain factor. Both circular and coaxial waveguides, with and without a corrugated flange, are considered. For the corrugation geometry, the commonly used rectangular shape and a trapezoidally-profiled one are studied. It is shown that the location and the uniqueness of the feed-phase centre depend on waveguide dimensions, the corrugation number, their location and shape. For an optimum phase-centre location, the resulting phase errors, over a selected angular region, are also determined.

Published in:

IEE Proceedings H - Microwaves, Antennas and Propagation  (Volume:132 ,  Issue: 3 )