A SIMPLE METHOD FOR CALCULATING THE REFLECTION COEFFICIENT OF OPEN-ENDED WAVE-GUIDES

This paper presents a simple but effective method for the analysis of open-ended waveguides. The method begins with the introduction of a la rge waveguide to approximate the half-space. In order to avoid the con vergence problem lossy dielectric is assumed to homogeneously fill the large waveguide. After obtaining a number of convergent data for diff erent values of the loss tangent an extrapolation technique is employe d to calculate the solution to the original problem-a waveguide termin ated by an infinite conducting flange and radiating into a lossless or low-loss half-space. Numerical results are given to show the validity of the proposed method. The behavior of the effect of the loss tangen t on the size of the large waveguide and On the final results are also examined.