Ray analysis of mutual coupling between antennas on a convex surface

1 November 1981

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation

Vol. 29 (6) , 911-922
https://doi.org/10.1109/tap.1981.1142682

Abstract

An approximate asymptotic solution is presented for the electromagnetic fields which are induced on an electrically large perfectly conducting smooth convex surface by an infinitesimal magnetic or electric current moment on the same surface. This solution can be employed to calculate the mutual coupling between antennas on a convex surface in an efficient and accurate manner. In this solution, the surface fields propagate along Keller's surface ray paths, and their description remains uniformly valid within the shadow boundary transition region including the immediate vicinity of the source. Furthermore, the effect of surface ray torsion on the surface fields is indicated in the present solution, through a factorT/k, whereTdenotes the surface ray torsion andkis the surface curvature in the ray direction. This solution is deduced from the asymptotic solutions to simpler canonical problems. Numerical results for the mutual coupling between slots in cylinders and cones are presented, and are shown to compare very well with experiments.

Keywords

This publication has 12 references indexed in Scilit:

Analysis of on-aircraft antenna patterns
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2005
Approximate asymptotic solution of surface field due to a magnetic dipole on a cylinder
IEEE Transactions on Antennas and Propagation, 1978
Creeping waves on a perfectly conducting cone
IEEE Transactions on Antennas and Propagation, 1977
Approximation techniques for the mutual admittance of slot antennas on metallic cones
IEEE Transactions on Antennas and Propagation, 1974
An analysis of the radiation from apertures in curved surfaces by the geometrical theory of diffraction
Proceedings of the IEEE, 1974
Excitation of a conducting cylindrical surface of large radius of curvature
IEEE Transactions on Antennas and Propagation, 1962
A reaction theorem and its application to antenna impedance calculations
IEEE Transactions on Antennas and Propagation, 1961
Diffraction by a smooth object
Communications on Pure and Applied Mathematics, 1959
Currents Excited on a Conducting Surface of Large Radius of Curvature
IEEE Transactions on Microwave Theory and Techniques, 1956
Diffraction of a convex cylinder
IEEE Transactions on Antennas and Propagation, 1956