Computation of the radiation characteristic of antennas on complicated structures in the high frequency case. Principle of the geometrical theory of diffraction

The geometrical theory of diffraction is used to determine the radiation characteristic of antennas on complicated structures, such as satellites and aircrafts and the scattering at these structures in the high frequency case. For the solution, the complicated structures were divided into canonical forms which can be analyzed by rigorous asymptotic methods. Beside the ray-optical construction of the high frequency field, the important canonical problem of the diffraction at an edge was treated extensively. The diffraction coefficients for the computation of the diffracted field are presented. The problem of vertex diffraction is discussed.