Title :
Design of a Printed Quadrifilar-Helical Antenna on a Dielectric Cylinder by Means of a Genetic Algorithm [Antenna Applications Corner]
Author :
Moghaddam, Ehsan Sarvghad
Author_Institution :
K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
This paper presents the application of a genetic algorithm (GA) to the optimization of an S-band quadrifilar-helical antenna, which is printed on a dielectric cylinder. This antenna was designed for LEO satellite applications. Its saddle-shaped pattern should compensate for free-space loss variations in the satellite´s footprint. The steady-state genetic algorithm was used for this optimization and an elitist strategy was implemented. The selection strategy in the present genetic algorithm was proportionate selection.
Keywords :
artificial satellites; genetic algorithms; helical antennas; microstrip antennas; satellite antennas; GA; LEO satellite applications; S-band ptinted quadrifilar-helical antenna; dielectric cylinder; elitist strategy; free-space loss variations; genetic algorithm; optimization; saddle-shaped pattern; satellite footprint; Analytical models; Antenna radiation patterns; Conformal mapping; Dielectric devices; Genetic algorithms; Helical antennas; Polarization; Satellite communication; Helical antennas; LEO satellite; antenna radiation patterns; circular polarization; conductor core; conformal antennas; cylindrical antennas; dielectric cylinder; genetic algorithm (GA); quadrifilar helical antenna (QHA); saddle-shaped pattern; satellite antennas;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2011.6097348
