Accession Number:

AD0658339

Title:

CURRENT TRANSFORM METHOD FOR CALCULATING RADIATION FIELDS,

Descriptive Note:

Corporate Author:

NEW MEXICO STATE UNIV UNIVERSITY PARK PHYSICAL SCIENCE LAB

Personal Author(s):

Report Date:

1955-03-25

Pagination or Media Count:

64.0

Abstract:

An exact expression is derived for the electromagnetic field radiated by an arbitrary distribution of charge and current located within a bounded region of space. An expansion of the current distribution in terms of spherical harmonics expressed about the origin yields an infinite series which may be integrated term by term to evaluate the vector potential. The characteristic current functions together with the corresponding terms in the vector potential expansion provide a set of transform pairs. These may be identified as the effective multipole components of the extended source distribution. Applications of the method have been made to determine the radiation from a linear, half-wave doublet antenna and to the radiation from the current induced in a paraboloid reflector. These reduce to the known solutions obtained by other methods. The principal advantages of the current transform method are its greater generality and its greater accuracy compared with other methods of calculation. Author

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE