Concerning the Identification of Buried Dielectric Targets.
Abstract
For identifying dielectric targets buried in a lossy dielectric such as soil, one can use the natural frequencies as a signature. However, these are dependent not only on the constitutive parameters of the target, but also on those of the surrounding medium. For frequencies above the relaxation frequency of the medium (the high-frequency window) and for the relative dielectric constant Er of the target (relative to the external medium) sufficiently small one can evaluate the natural frequencies as perturbations based on the asymptotics for Er approaches 0. This gives a set of external resonances dominated by the external medium parameters, and a set of internal resonances dominated by the internal medium parameters. The latter are cavity resonances with damping from the external medium proportional to Er(1/2).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 24, 1994
- Accession Number
- ADA345535
Entities
People
- Carl E. Baum