This report describes the investigations conducted during a program to investigate the applicability of endfire, dielectric radiating elements in easily transportable satellite communications antenna arrays. Investigations of the applicability of these elements as primary feeds for lenses and reflectors are also described. The program has provided a new and workable theory that is applicable to a wide range of element sizes and materials and has resulted in the development of the Foamrod Antenna which has an order of magnitude greater gain than conventional end-fire dielectric elements. An Array Design Plan was written which describes an array equivalent to a thirty foot diameter parabolic antenna. For a feasibility model, a 16-element array was designed for electrical performance equivalent to a 15 foot diameter paraboloid. In the area of feeds for reflector antennas, some promising results have been obtained.