VIRTUAL TOOLS FOR RESEARCH OF RECTANGULAR WAVEGUIDE

Abstract

The rectangular waveguide is the most common type of transmission line in millimeter, centimeter, and short-wave part of decimeter range. It allows to transmit quite significant levels of power with a small attenuation, is broadband and mechanically strong. The mode of operation of the transmission line is characterized by a number of parameters, which during its operation are subject to control and are maintained within certain limits by the prescribed adjustments. In order to study waves in a rectangular waveguide for educational purposes, it is often enough to simulate a computer model that can replace a complex of valuable equipment. In this work, a virtual table in a LabView environment, which allows to carry out simulation in order to determine electromagnetic wave parameters in a rectangular waveguide, is synthesized. For a wave of a given type with arbitrary coupling of m and n indices propagating over a waveguide with given geometric dimensions of the cross section, it is possible to determine critical wavelength or critical frequency. Also, the developed virtual toolkit allows to investigate the dispersion in the waveguide, to estimate the value of losses in the waveguide and the efficiency, to determine, separately for the waves of E and H types, characteristic resistance of the waveguide and reflection coefficient. Analytical expressions are obtained to calculate the breakdown power of a waveguide in the propagation of waves of E and H types, which are also implemented as appropriate virtual instruments. The developed virtual toolkit allows to organize distance learning. The synthesized virtual table is a convenient tool for studying the parameters and characteristics of a rectangular waveguide, and when used in the learning process, it will contribute to improving the understanding of the physical processes occurring in the propagation of wavelengths of E and H types in the waveguide.