High Resolution Frequency Swept Imaging.
Abstract
High resolution (microwave or ultrasound) apertures suitable for use in single frequency longrange imaging radar (or sonar) are prohibitively expensive and difficult, if not impossible, to implement. In addition they are expected to suffer from image degradation by speckle or coherent noise that is a drawback of all monochromatic imaging systems. Also their longitudinal resolution is expected to deteriorate rapidly with range. The effort described in this final report has been initiated to study frequency or wavelength diversity techniques as a means of overcoming some or all of the above limitation. A primarily analytical and numerical study of frequency diversity imaging has lead to the following major findings: Such broadband techniques can be employed to enhance the information content of the wave field scattered by a coherently illuminated object and collected by a recording aperture through a process of aperture synthesis by frequency diversity (swept, stepped or multifrequency illumination and detection).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1980
- Accession Number
- ADA082392
Entities
People
- N. H. Farhat
Organizations
- Moore School of Electrical Engineering