Abstract
In this paper, the cross polarization reduction is reviewed in offset reflector antennas by expressing the primary feed radiation patterns in terms of analytic functions. The feed under study is a dual-mode circular waveguide antenna, operating at the fundamental mode, TE 11 , and the higher order TE 21 mode. Closed-form analytical functions are selected to approximate each mode which allows selection of symmetric and asymmetrical patterns with different field tapers in the principal planes and arbitrary excitation coefficients. It will be shown that, the asymmetrical aperture distribution of the dominant TE 11 mode in the presence of the higher TE 21 mode is sufficient to reduce the cross polarization of offset reflector antenna in both asymmetric and inter-cardinal planes, i.e. φ=90° and 45°.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
