Abstract
The cross polar power resulting due to illumination of an offset reflector by a linearly polarized circular feed operating in TE 11 mode can be suppressed considerably by employing TE 21 and TM 11 modes having proper mode coefficients and relative phases. This paper presents the design and performance evaluation of such a smooth walled circular tri-mode matched feed. Using an analytical pattern for the tri-mode feed and physical optics (PO) for computation of far field, mode coefficients and relative phases are estimated using particle swarm optimization (PSO) technique. Through a parametric study in HFSS, matched feed dimensions to achieve required mode coefficients and phases at the design frequency are determined. HFSS is used to evaluate the performance of the matched feed in terms of cross-polarization and beam squinting. A −30 dB cross-polar bandwidth of 2.73% is achieved at the design frequency.
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.
