Title :
Mode-matching analysis of top-hat monopole antennas loaded with radially layered dielectric
Author :
Francavilla, Laura A. ; McLean, James S. ; Foltz, Heinrich D. ; Crook, Gentry E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
1/1/1999 12:00:00 AM
Abstract :
A top-hat monopole antenna with homogeneous or inhomogeneous dielectric loading over a ground plane is considered. Mode-matching analysis with proper enforcement of edge conditions is applied to the problem. The results of this technique are verified through independent calculations of admittance as well as by comparison of fields across matching regions. Measurements were also taken for comparison with the results from the model. It is shown that dielectric loading can reduce the electrical size necessary for self resonance, but only at the expense of a large increase in radiation Q
Keywords :
Q-factor; dielectric-loaded antennas; electric admittance; electric fields; magnetic fields; modal analysis; mode matching; monopole antennas; admittance; antenna measurements; dielectric loading; edge conditions; electric field expansion; electrical size reduction; ground plane; homogeneous dielectric loading; inhomogeneous dielectric loading; input impedance; loaded top-hat monopole antennas; magnetic field expansion; matching regions; measurements; mode-matching analysis; radially layered dielectric; radiation Q; self resonance; Antenna measurements; Current distribution; Cutoff frequency; Dielectric materials; Geometry; Impedance; Loaded antennas; Magnetic field measurement; Magnetic materials; Resonance;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
