Digital Algorithm Specification for the VLSI Implementation of the Electromagnetic Field of an Arbitrary Current Source.
Abstract
A digital algorithm specification has been developed for the VLSI implementation of the electromagnetic fields of an arbitrary current source. The algorithm solves for the magnetic (H) and electric (E) fields of a finite length dipole with arbitrary current sources. A mid-point summation technique is employed for the numerical solution for H and E. MACSYMA, an algebraic manipulation program was utilized to separate the H and E field equations into real and imaginary parts with rectangular vector components. A digital simulation was accomplished with a single z-directed dipole, 10 wavelengths long, for the test antenna. Numerical solutions utilizing uniform and triangular envelope current distributions were compared with the far-field solution for the test antenna at ranges of 250 and 500 wavelengths. The number of sub-elements in the mid-point summation were 50, 100, and 500. The numerical solution compared reasonably well with the far-field solution when the test antenna was segmented into 50 sub-elements. The percent difference between the numerical and far-field solutions decreased to less than 1 percent for 95 percent of the observation points when the test antennas was segmented into 500 sub-elements. The greatest differences between the numerical and far-field solutions occurred in the null regions of the radiation pattern. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA177601
Entities
People
- Brian A. Hoyt
Organizations
- Air Force Institute of Technology