Simple model to determine the gap effect on the input impedance of a cylindrical dipole. Application to standard antennas

Abstract

The effect of the Gap width on the impedance of a center-fed dipole is studied. We propose here an equivalent capacitance to model the discontinuity of the Gap region, in a closed-form formula. This model explains successfully the dependence of the input impedance to the gap characteristics as well as the current density along the dipole. The model has been used for a calculable standard dipole and the results show a good agreement with the experimental tests. © Springer-Verlag 2004.