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The conventional Kouyoumjian transition function cannot be used to evaluate the diffracted field for a converging wave because its argument is imaginary, and the total field is not continuous at reflection and shadow boundaries. In order to find the diffracted field near the edge shadow of the inflected surface, Rusch's proposed edge-diffraction transition function for a converging wave is used. The...
A JPL Fortran program for designing the main reflector and the subreflector of a Galindo-Williams system with a constant intensity over the aperture of the main reflector was modified for use on our computer system. Geometrical Optics and conservation of energy are the basic laws used for designing this type of surface. The basic computation is a numerical solution of three simultaneous differential...
Based on an exact solution of the pertinent boundary-value problem, a method is presented for finding the electromagnetic fields scattered or guided by dielectric gratings having arbitrary profiles. This method unifies the treatment of both perpendicular (TE) and parallel (TM) polarization by using the Boundary Element Method (BEM). To illustrate the method, the results are presented for a four layer...
Parallel dielectric waveguides are used as optical directional couplers. In this paper for two identical rectangular parallel dielectric waveguides, the propagation constants are calculated by the perturbation feedback method.
The floating exodus method is introduced. The Green's Junction in a center of a square with dielectric wedges is obtained. The probabilistic interpretation of Green's identity' is presented. The Shanks transformation is used to increase the convergency speed. The capacitance of a symmetrical stripline is obtained, and is compared with analytical solution.
We study the performance of a chirped sinusoidal surface relief grating in an optical waveguide as a wavelength demultiplexer by means of local normal mode theory. Linear chirp and contrapropagating guided-to-guided mode coupling is considered in phase synchronism. Two first-order differential coupled-mode equations with variable coefficients give approximate solutions for the coupling of the contrapropagating...
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