Experimental and theoretical analysis of anisotropic trapezoidal antennas
Abstract
A novel broadband antenna is described, in the form of a comblike trapezoidal anisotropic structure above a ground plane. The base of the comb is mounted close to the ground plane, parallel to it, and is fed at one end by a coaxial line. Such an antenna has uniquely defined polarization of the radiated field and very good aerodynamic properties. An experimental model of the antenna was made using a printedcircuit technique. By trimming the upper edge of the comb, an antenna was obtained experimentally having VSWR less than 2.0 (with respect to 50 ohms) in a frequency range of about two octaves. It was found that the antenna radiation pattern varies with frequency, but that a direction exists in which the antenna radiates well at all frequencies in the range. A mathematical model was also developed, permitting a rather accurate numerical analysis of the antenna.
 Publication:

International Symposium on Electromagnetic Waves
 Pub Date:
 1981
 Bibcode:
 1981emw..sympR.321P
 Keywords:

 Antenna Design;
 Antenna Radiation Patterns;
 Computer Aided Design;
 Electromagnetic Measurement;
 Ground Effect (Communications);
 Microwave Antennas;
 Anisotropic Media;
 Antenna Feeds;
 Broadband;
 Coaxial Cables;
 Design Analysis;
 Error Analysis;
 Numerical Analysis;
 Printed Circuits;
 Standing Wave Ratios;
 Trapezoids;
 Communications and Radar