Space-domain moment-method solution of a dielectric-loaded slot antenna fed by a microstrip line laid on a DR strip

Abstract

The MoM solution by using the space‐domain free‐space dyadic Green's functions is obtained for a dielectric‐loaded slot antenna which is fed by a microstrip line laid on top of a DR strip. The simplicity and effectiveness of this method are demonstrated in this study. The flexibility of using a DR‐strip microstrip line is found in its adaptability to both flat and slightly curved surfaces. While the performance of this antenna is found to be as good as the same antenna fed by a conventional microstrip line, the high dielectric constant endowed with the DR material has a significant advantage over conventional microstrip lines in providing a better impedance matching for dielectric‐loaded slot antennas. The versatility of the space‐domain analysis method is also found to be greater than the spectral‐domain method. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 202–205, 1999.