On the Electrically Thick Cylindrical Antenna

The problem of a thick cylindrical antenna driven by a delta-function generator is investigated. Numerical solutions are obtained for two different mathematical models: one is driven by a deltafunction generator on both outside and inside surfaces of the antenna, and another is driven only on the outside surface. In both cases, the current singularity near the driven point has been taken care of and subsequently subtracted out, before the numerical solution is applied. For antennas with circumferences less than a free-space wavelength, the results are compared with the experimental data. For antennas with larger radii, no experimental data are yet available.