A GTD study of pyramidal horns for offset reflector antenna applications
Abstract
An efficient computational method is demonstrated for determining the far-field patterns of reflectors illuminated by pyramidal horns. A uniform geometrical theory of diffraction (GTD) formulation is used to determine the near- and far-fields of the horn. The far-field patterns of the offset reflector are constructed using the physical optics (PO) formulation in conjunction with the Jacobi-Bessel expansion method. Many representative results are shown for the far-field patterns of the reflector. In particular, the concept of the optimum phase center for the best location of a horn illuminating a reflector is carefully studied and some useful observations are made.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- March 1983
- DOI:
- 10.1109/TAP.1983.1143051
- Bibcode:
- 1983ITAP...31..305H
- Keywords:
-
- Antenna Radiation Patterns;
- Far Fields;
- Geometrical Theory Of Diffraction;
- Horn Antennas;
- Pyramidal Bodies;
- Reflectors;
- Antenna Design;
- Bessel Functions;
- Computer Aided Design;
- Jacobi Matrix Method;
- Run Time (Computers);
- Communications and Radar