
Accession Number : AD0637990
Title : THE INTEGRAL EQUATION FOR THE CURRENT IN A THICK TUBULAR ANTENNA.
Descriptive Note : Technical rept.
Corporate Author : CRUFT LAB HARVARD UNIV CAMBRIDGE MASS
Personal Author(s) : Wu,Tai Tsun ; king,Ronald W. P.
Report Date : MAY 1966
Pagination or Media Count : 20
Abstract : The conventional integral equation for the current in a cylindrical antenna is not correct for a tubular antenna when driven by an emf maintained in a narrow circumferential region along its outside surface. The basic electromagnetic theory of the doublyconnected region represented by such an antenna is reviewed. It is shown that the scalar potential and the normal derivative of the vector potential must be discontinuous across the air cylinder within the tube and that this discontinuity contributes an additional term to the integral equation. This term is negligible for electrically thin antennas but of major importance in determining the current and admittance for antennas that are electrically thick. (Author)
Descriptors : (*INTEGRAL EQUATIONS, *FIELD THEORY), (*ANTENNAS, FIELD THEORY), ELECTROMAGNETISM, BOUNDARY VALUE PROBLEMS, CYLINDRICAL BODIES
Subject Categories : Electrical and Electronic Equipment
Numerical Mathematics
Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE