Significant Irregularities in the NRD Waveguide

This paper discusses three types of significant discontinuity in an Non-Radiative dielectric (NRD) waveguide: gap, cross-section shift and step. This topic has been under research and studies since the middle of the last century, but still, there are no clear suggestions how to approximately estimate the losses without designing NRD elements and using a complex mathematical apparatus for results presentation. In this paper, the proposed solution of this problem is introduced based on experimental studies that were carried out with approximation laws and using coefficients for various dielectric constants.