Title :
Eigenmode Analysis of an AMC Ground Plane for Wideband High-Gain Antennas
Author :
Mateos, R.M. ; Craeye, C.
Author_Institution :
Univ. Catholique de Louvain, Louvain-la-Neuve
Abstract :
When trying to enlarge the bandwidth of antennas based on artificial magnetic conductors (AMC), the radiation pattern tends to split at broadside. A rectangular non-periodic design has been proposed by Mateos, R.M. (2006) to overcome this problem. An eigenmode analysis based on the method-of-moments (MoM) technique is performed to study the wave modes supported by an AMC consisting of a backgrounded array of square patches. It reveals that the propagation of a bounded mode is avoided by a cut of the AMC surface in the H-plane. Besides this, reducing the patches length in the E-plane direction, causes such trapped mode to appear outside the band of interest; while the surface may support a leaky wave.
Keywords :
antenna radiation patterns; broadband antennas; eigenvalues and eigenfunctions; method of moments; AMC ground plane; E-plane direction; artificial magnetic conductors; eigenmode analysis; method-of-moments technique; radiation pattern; wideband high-gain antennas; Bandwidth; Broadband antennas; Conductors; Dipole antennas; Frequency; Geometry; Magnetic analysis; Modal analysis; Moment methods; Surface waves;
Conference_Titel :
Electromagnetics in Advanced Applications, 2007. ICEAA 2007. International Conference on
Conference_Location :
Torino
Print_ISBN :
978-1-4244-0767-5
Electronic_ISBN :
978-1-4244-0767-5
DOI :
10.1109/ICEAA.2007.4387301
