The Array Scanning Method and Applying it to Determine the Impedance of Linear Antennas in a Lossy Half Space
Abstract
This report presents a simple plane wave expansion for the mutual impedance between two parallel sinusoidal dipoles. Complex plane wave reflection coefficients are then introduced to account for a parallel plane interface. The mutual impedance is inferred from a previously reported solution for an infinite array. This technique is called the Array Scanning Method (ASM) and has a clear physical interpretation which greatly facilitates its use. It can be applied to moment solutions of wire antennas using Galerkins method with a piecewise sinusoidal expansion for the current. Numerical evaluation is straightforward when the dipole is in the lossy half-space and the utility of the method is demonstrated by the presentation of results for the input impedance of dipoles in a variety of half space environments. Computer time is inversely proportional to d 1, where d is the distance of the dipole from the half space. For conducting media and low frequencies an approximation is made to reduce computation time. The moment method solution of a dipole buried at depth as small as 1/150,000 wavelength in the earth is presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1976
- Accession Number
- ADA111361
Entities
People
- B. A. Munk
- G. A. Burrell
Organizations
- Ohio State University