Accession Number : AD0281899

Title :   DIFFRACTION STUDIES.

Descriptive Note : Final rept.,

Corporate Author : ITEK CORP WALTHAM MASS

Personal Author(s) : Barakat,Richard

Report Date : JUN 1962

Pagination or Media Count : 69

Abstract : From a stochastic generalization of the Green-Wolf complex scalar potential of electromagnetic theory, it has been concluded that the Green-Wolf complex scalar potential does not offer any simplifying advantages when applied to the solution of electromagnetic boundary value problems. A number of unsuccessful attempts were made to circumvent these difficulties by application of judicious approximations. The situation is different at high frequencies such as encountered in optical diffraction or microwave antennas. Here no attempt is made to solve the complete boundary value problem and attention is focused upon the behaviour of the far field patterns. A scalar description of these problems is adequate for low numerical apertures. In high numerical aperture systems, there are a number of difficulties associated with the definition of intensity or illuminance. If the complex scalar potential is utilized, it rigorously represents the electromagnetic field and the illuminance can be set equal to the mean electromagnetic energy density according to the prescription of the complex scalar theory of Green and Wolf. (Author)

Descriptors :   *DIFFRACTION, *ELECTROMAGNETISM, ANTENNAS, HIGH FREQUENCY, INTENSITY, LUMINESCENCE, MICROWAVES, OPTICS, VECTOR ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE