Enhancement of microwave holographic images by non-coherent superposition
Abstract
Microwave images were enhanced by noncoherently superimposing several images that were individually computed from data that were measured for slightly differing, but distinct object orientations. The data were phase and intensity, measured by a sampling array that consisted of two, crossed, linear antenna arrays operating at 16.00 GHz. One array transmitted, and the other received. A set of switches connected the transmitting antennas to a coherent source, and another set connected the receiving antennas to a receiver that was supplied with a coherent reference field. A digital computer formed the images by a fast Fourier transform after the measured data were multiplied by a quadratic phase function that simulated a lens. The images were displayed by a computer driven plotter with 10 grey scales.
- Publication:
-
ICIASF 1975; 6th International Congress on Instrumentation in Aerospace Simulation Facilities
- Pub Date:
- 1975
- Bibcode:
- 1975ieee.conf..112Y
- Keywords:
-
- Computer Techniques;
- Fast Fourier Transformations;
- Image Enhancement;
- Linear Arrays;
- Microwave Holography;
- Digital Computers;
- Microwave Antennas;
- Microwave Scattering;
- Parabolic Bodies;
- Technology Assessment;
- Wave Front Reconstruction;
- Instrumentation and Photography