Modified waveguide model (MWGM) for rectangular dielectric resonator antenna (DRA)

Based on the concept of effective dimensions, a modification to the conventional waveguide model (CWGM), usually used to predict the resonant frequency of rectangular DRA, is introduced. Compared with the experimental results, it is found that this newly introduced MWGM yields more accurate results for the resonant frequency than the CWGM. Accuracy of the results is also checked by comparison with numerically calculated values using a TLM-based commercial software. It is also found that the MWGM not only yields accurate values, but also results in considerable computation time savings.