Superdirective Properties of Closed Loops of Parallel Coplanar Dipoles
Abstract
This report describes the researches carried out under contract F19628-88-K-0024 from March 28, 1988 through February 28, 1991. After a short review of earlier work, recent progress in the theoretical analysis of resonant loops of dipoles is dipoles is discussed. In particular, it is pointed out that a way has been found for relating an infinite number of integral equations to a relatively small number. An improvement in the accuracy of the analysis of a resonant circular array of electrically short elements is described and a sequence of twelve basic properties formulated. These relate to the kernel, the conductances, the susceptances, and the horizontal and vertical field patterns. An important conclusion is that any perturbation of the shape of the resonant circular array that results in only a slight change in the currents will significantly change the field pattern and possibly lead to one with superdirective properties. The report concludes with an appendix containing references to the seven published papers generated under this contract. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1991
- Accession Number
- ADA243009
Entities
People
- George Fikioris
- Hao-ming Shen
- Ronald W. King
- Tai T. Wu
Organizations
- Harvard University