1989, 11(6): 569-575.
Abstract:
A new method is presented to analyze the multilayer electrically thick circular microstrip antenna excited by a probe. The current on the probe is taken to be uniform. Based on free space electric dyadic Green s function, the field expression of a horizontal electric dipole (HED), which is located in any point of multilayer media and in any direction, has been derived. By using this field expression and Richmond reaction equation, an integral equation of electric current on the patch is formulated. By properly choosing basic function for current expansion, this method can be used for an electrically thick microstrip antenna. The theoretical results are very agree with experimental data for an electrically thick circular microstrip antenna with an air gap.