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 doubly-connected 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