Surface Current Determination from Localized Measurements
Abstract
This report describes the results of a research program aimed at developing and demonstrating a technique for determining surface currents from a series of electromagnetic field measurements. Two back-propagation techniques were developed and validated through numerical simulations and measurements on laboratory-scale, conducting objects. The first technique is a planar spectral decomposition approach that utilizes magnetic field measurements on a plane in front of the body, and the second i a local back-propagation technique that operates using magnetic field measurements at a much smaller number of sample points. The back-propagation techniques were demonstrated through measurements on a series of laboratory-scale targets, including solid metallic plates, metallic plates with slots, and more complex objects, such as a scale-model ship and a frequency selective surface. The back-propagated results were compared to predictions of the surface current obtained using a finite difference time domain numerical code. The predicted and experimental results are in agreement, validating the back- propagation approaches for these targets. This report contains a description and analysis of the back-propagation techniques, details of the measurements, and representative results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 2000
- Accession Number
- ADA374587
Entities
People
- Eric Kuster
- Jim Maloney
- Morris P. Kesler
- Paul Harms
- Stephen Blalock
Organizations
- Georgia Tech Research Corporation