HELICAL WAVEGUIDE WITH TWO BENDINGS, AND APPLICATIONS

This paper presents an improved approach for the propagation of electromagnetic (EM) flelds along a helical hollow waveguide that consists of two bendings in the same direction. In this case, the objective is to develop a mode model for infrared (IR) wave propagation, in order to represent the efiect of the radius of the cylinder of the helix and the step's angle on the output flelds and the output power transmission. This model enables us to understand more precisely the in∞uence of the step's angle and the radius of the cylinder of the helix on the output results of each section (bending). The output transverse components of the fleld, the output power transmission and the output power density for all bending are improved by increasing the step's angle or the radius of the cylinder of the helix, especially in the cases of space curved waveguides. This mode model can be a useful tool to improve the output results in all the cases of the helical hollow waveguides with two bendings for industrial and medical regimes.