OPTIMIZING MULTIMODE HORN FEED ARRAYS FOR OFFSET REFLECTOR ANTENNAS USING A CONSTRAINED MINIMIZATION ALGORITHM TO REDUCE CROSS-POLARIZATION

Authors
SHEE KK SMITH WT
Citation
Kk. Shee et Wt. Smith, OPTIMIZING MULTIMODE HORN FEED ARRAYS FOR OFFSET REFLECTOR ANTENNAS USING A CONSTRAINED MINIMIZATION ALGORITHM TO REDUCE CROSS-POLARIZATION, IEEE transactions on antennas and propagation, 45(12), 1997, pp. 1883-1885
Citations number
7
Categorie Soggetti
Telecommunications,"Engineering, Eletrical & Electronic
Journal title
IEEE transactions on antennas and propagation → ACNP
ISSN journal
0018926X
Volume
45
Issue
12
Year of publication
1997
Pages
1883 - 1885
Database
ISI
SICI code
0018-926X(1997)45:12<1883:OMHFAF>2.0.ZU;2-1
Abstract
This letter presents an algorithm for suppressing the cross polarizati on of single offset reflector antennas illuminated by a cluster of mul timode horn feeds using a constrained minimization routine. The design variables are the mode ratios for the higher order modes excited in t he feeds relative to the dominant TE11 mode. The goal is to systematic ally determine the optimum mode ratios such that the overall crosspol performance of the reflector antenna improves relative to the single T E11 mode excitation, The multimode horns considered are Potter-type (d ual mode) horns and trimode horns.