SURFACE WAVES ON ANISOTROPIC SURFACES.
Abstract
The main problem treated is the determination of the electromagnetic characteristics, i.e., the velocity of propagation, power flow, etc., of surface waves guided by various surfaces on which the current is constrained to flow along parallel sinusoidal paths. The purpose was to learn more about the behavior of waves on periodic anisotropic surfaces and to apply this knowledge, where possible, to obtain a clearer understanding of the method of operation of log-periodic antennas. Rumsey's continued fraction solution for the propagation characteristics of surface waves on the single sinusoidally anisotropic plane is extended to two parallel sinusoidally anisotropic planes, to the circular cylindrical sinusoidally anisotropic surface, and to the sinusoidally corrugated sheet. For surface waves on the single sinusoidally anisotropic plane, the following properties are determined: direction of power flow with respect to direction of propagation, the Floquet coefficients of the series which describes the surface wave fields, an integral representation of the summation of the Floquet series, the geometrical requirements for resonating a surface wave, and the propagation characteristics for the special cases of very low frequency and of propagation at the velocity of light perpendicular to the axes of the sinusoids. On the basis of power conservation, approximate power flow diagrams are given for leaky waves and surface waves in general. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 19, 1965
- Accession Number
- AD0624602
Entities
People
- Michael J. Gans
Organizations
- University of California, Berkeley