Title :
Modification and control of currents on monopole antennas using magnetic bead loading
Author :
Kennedy, Timothy F. ; Long, Stuart A. ; Williams, Jeffery T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Houston Univ., TX, USA
fDate :
6/25/1905 12:00:00 AM
Abstract :
Several methods to modify the currents on electrically long monopole antennas are investigated. The radiation pattern, input impedance, and resonant frequency are calculated for several configurations of monopoles loaded with magnetic materials, both as coatings and as small beads. Proper application of such loading is shown to cause the radiated fields and resonant frequency to mimic a shorter quarter-wave monopole.
Keywords :
antenna radiation patterns; current distribution; electric impedance; magnetic materials; monopole antennas; wire antennas; current control; current distribution; current modification; electrically long antennas; input impedance; magnetic bead loading; magnetic coatings; monopole antennas; quarter-wave monopole; radiation pattern; resonant frequency; wire antennas; Antenna radiation patterns; Coatings; Communication system control; Current distribution; Impedance; Loaded antennas; Magnetic materials; Resonant frequency; Wire; Wireless communication;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2003.819681
