To facilitate practical applications of the theory apart from its detailed development and verification, principal points of the two-term theory, together with the steps required in its utilization, are summarized in this appendix. Numerical results for arrays containing only a few elements can be computed by hand with the aid of the tables in appendix I or those in the literature [1]. Calculations for larger arrays or for element parameters not included in the tables generally require a computer. For these applications, the theory can be conveniently packaged as a computer programme to which the user need only supply input data cards specifying the parameters of the elements and array to obtain a numerical evaluation of any properties of the array [2]. In this form, the theory can be used without considering either intricate mathematics or complicated programming steps once the initial programming is completed. In a reasonably general programme, the parameters that can be specified as input data are the number N of antennas in the array, their radius a, length 2h, spacing d, and the relative driving voltages Vi or currents Ii(0).

The theory applies to arrays of thin, identical, parallel, non-staggered, centre-driven, highly conducting dipoles which are uniformly spaced around a circle. If the admittances and currents are multiplied by two, they also apply to arrays of vertical monopoles over a large highlyconducting ground plane.