The geometrical theory of diffraction  A method for the solution of electromagnetic boundary problems of complicated structures in the high frequency case
Abstract
Determination of the radiation characteristic of antennas on complicated structures, such as satellites and aircraft, and the scattering at these structures in the high frequency case with the aid of the geometrical theory of diffraction is dealt with. The complicated structures are divided into canonical forms, which can be analyzed by rigorous asymptotic methods. The most important canonical problems like the diffraction at an edge are treated extensively. The diffraction coefficients for the computation of the diffracted field are presented. Ray tracing is carried out for several structures. The computation of the field at caustics with the aid of equivalent edge currents or correction factors respectively is discussed in detail. The field of application and the accuracy of the geometrical theory of diffraction is demonstrated with numerous computational examples.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 April 1978
 Bibcode:
 1978STIN...7823310S
 Keywords:

 Aircraft Antennas;
 Boundary Value Problems;
 High Frequencies;
 Satellite Antennas;
 Wave Diffraction;
 Antenna Radiation Patterns;
 Asymptotic Methods;
 Canonical Forms;
 Edges;
 Electromagnetic Radiation;
 Electromagnetic Scattering;
 Geometry;
 Ray Tracing;
 Communications and Radar