Validation of the hybrid quasi-static/full-wave method for capacitively loaded thin-wire antennas

A hybrid method in which quasi-static and full-wave integral equations are combined was developed by R.G. Olson et al. (see ibid., vol.36, p.1180-1184, Aug. 1988). Using point colocation, the method is implemented here for axially symmetric problems containing thin wires in the full-wave region and conductors and/or dielectrics in electrically small regions. The method is validated by comparing the predicted input admittances with measured results for capacitor-loaded antennas. The method is shown to be a significant improvement over thin-wire codes in which the electrically small region is replaced with an equivalent lumped load. The improvement is especially apparent in cases for which a detailed knowledge of the field in the electrically small region is needed