Simple method of antenna analysis leading to the mode-theory results

A method of antenna analysis is presented which gives the current distribution and input impedance of finite conical antennas. The results for the impedance are identical with those obtained from the ´mode theory´, but the results for the current have the advantage that they are found in closed form. In addition, the method is much more easily applied. A very general method of obtaining the characteristic impedance of an antenna which is a section of a spherical transmission line is also described, and this method is applied to the folded triangular monopole.