International Journal of Antennas and Propagation
Volume 2007 (2007), Article ID 32345, 4 pages
doi:10.1155/2007/32345
Research Article
Derivation of Conditions for the Normal Gain Behavior of Conical Horns
Faculty of Engineering and Computer Science, The University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
Received 12 January 2007; Revised 23 May 2007; Accepted 3 November 2007
Recommended by Deb Chatterjee
Abstract
Monotonically increasing gain-versus-frequency pattern is in general expected to be a characteristic of aperture antennas that include the smooth-wall conical horn. While optimum gain conical horns do naturally exhibit this behavior, nonoptimum horns need to meet certain criterion: a minimum axial length for given aperture diameter, or, alternatively, a maximum aperture diameter for the given axial length. In this paper, approximate expressions are derived to determine these parameters.