Slot bridges in coaxial waveguides. Characteristics and their optimization

Analytical and numerical approaches for detailed and precise analysis of such devices as antenna feeder lines, filters and diplexers are of considerable importance in modern antenna system design. Such approaches, above all, have to guarantee high accuracy of numerical results. That means, at first, that the method must be able to provide the solution of a relevant boundary value problem (BVP) for the Maxwell equations without any a priori simplifications. Secondly, the numerical process must be stable concerning round-off errors, thus the numerical algorithm has to be well conditioned. The approach for analyzing the diffraction and spectral characteristics of slot bridges in coaxial waveguides suggested here is such a kind; it is rigorous in mathematical aspects.