Ultrashort electromagnetic waves V — radiation

In the design of radiators or antennas for ultrashort waves a complete solution by Maxwell´s field equations is usually not practicable and, in many cases, not possible. It is therefore necessary to resort to engineering approximations based upon known physical phenomena. In this article the author discusses a method to be employed when the distribution of the current and the charge over the surface of the radiator are known. A subsequent issue will carry a continuation of this article in which a second method for the calculation of the field in space will be developed on the basis of the known field distribution in the immediate vicinity of the radiator as obtained from experimental data. The author is well known in the field of antenna design and is to a large extent responsible for the development of the instrument landing system used by the Civil Aeronautics Authority. This article is the fifth in a series presented originally as lectures before the basic science group of the AIEE New York Section.