Title :
An improved multimode horn for Gaussian mode generation at millimeter and submillimeter wavelengths
Author :
Neilson, Jeffrey M.
Author_Institution :
Calabazas Creek Res., Saratoga, CA, USA
fDate :
8/1/2002 12:00:00 AM
Abstract :
An improvement on the dual-mode horn for Gaussian mode generation has been developed. Previous designs have used a sudden transition or linear taper to generate the required TE11 and TM11 mode mixture. In the improved design presented here, an optimized nonlinear taper is used to generate multimodes, which have a fundamental Gaussian mode power fraction of 99% that exceeds that of the corrugated horn (98%). The bandwidth and return loss are both improved over other dual-mode horn designs.
Keywords :
Gaussian distribution; antenna feeds; antenna radiation patterns; horn antennas; millimetre wave antennas; submillimetre wave antennas; waveguide transitions; TE11 mode; TM11 mode; dual-mode horn; millimetre wave antennas; mode generation; multimode horn; nonlinear taper; radiation patterns; submillimetre wave antennas; Apertures; Bandwidth; Design optimization; Feeds; Horn antennas; Manufacturing; Power generation; Propagation losses; Structural beams; Submillimeter wave propagation;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2002.801282