Cavity method for experimental determination of the scatter matrix of three dimensional objects
Abstract
The concept of this approach is to surround the object by a conductive enclosure (cavity) instead of one having absorbing walls (anechoic chamber). The advantage of this approach is that the entire field surrounding the scatterer is confined within a relatively small, well-defined space which is not subject to uncontrollable external influences. Measurements performed on the fields inside the cavity yield data that can be applied to deriving the scatter matrix of the enclosed object. It is shown that the fields inside the cavity depend upon the scatter characteristics of the enclosed object, the reflection properties of the cavity walls, and on the excitation properties of the source. Since the latter two dependencies are mathematically predictable, information on the scatter characteristics of the object can be extracted from the measured field data. Sets of measured data, obtained when the object is repositioned inside the cavity, are required to determine the scatter matrix of the object.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1976
- Bibcode:
- 1976PhDT........87C
- Keywords:
-
- Cavities;
- Three Dimensional Composites;
- Diffraction;
- Electromagnetic Scattering;
- Reflection;
- Wave Functions;
- Communications and Radar