Over three decades have passed since the publication, in 1968, of “Arrays of Cylindrical Dipoles” by R. W. P. King, R. B. Mack, and S. S. Sandler. The present volume is a revised and enlarged second edition of that work. The objectives of “Cylindrical Antennas and Arrays” are similar to those of “Arrays of Cylindrical Dipoles”: to present approximate but efficient theoretical methods for determining current distributions, input admittances, and field patterns of arrays of cylindrical dipoles; to use such methods to analyze particular types of arrays; to describe experimental methods for determining current distributions, input admittances, and field patterns; and to correlate and compare theoretical and experimental results.

The most fundamental quantities, and the ones most difficult to determine theoretically, are the current distributions on the array elements. Rather than postulating the current distributions, perhaps the most common treatment in the literature of the 1960s, “Arrays of Cylindrical Dipoles” sought to determine the current distributions on the array elements by solving integral equations. Today's antenna and engineering literature is quite different from that of the 1960s: even elementary textbooks include discussions on determining current distributions from integral or similar equations.

As an example, consider the simplest configuration discussed in this book, the single, isolated cylindrical antenna of given length and radius. The integral equation treated in Chapter 2 is but one of the several integral or integro-differential equations that are encountered in the present-day literature.