Diffraction from cylindrically truncated planar surfaces with application to an aperture matched horn design
Abstract
A numerically derived solution of the diffraction coefficient for a source mounted on a perfectly conducting planar surface which is smoothly terminated by a circular cylinder is obtained using the hybrid approach which combines the moment method (MM) with the geometrical theory of diffraction (GTD). This solution is valid not only in the region away from, but also in the region near the shadow boundary. The accuracy and usefulness of this solution is demonstrated as it is applied to analyze a novel horn design which provides significantly better performance in terms of the pattern, impedance and frequency characteristics than normally obtainable. The basic concept utilizes an ordinary horn except that curved surface sections are attached to the outside of the aperture edges forming a junction which is smooth to the touch.
- Publication:
-
2nd International Conference on Antennas and Propagation
- Pub Date:
- 1981
- Bibcode:
- 1981icap.conf..367B
- Keywords:
-
- Antenna Design;
- Circular Cylinders;
- Computer Aided Design;
- Geometrical Theory Of Diffraction;
- Horn Antennas;
- Impedance Matching;
- Apertures;
- Error Analysis;
- Flat Surfaces;
- Performance Prediction;
- Surface Geometry;
- Communications and Radar