Abstract
A method has been devised to analyze multilayer electrically thick circular microstrip antenna excited by a probe. The current on the probe is taken to be uniform. This method was verified by analysis and experiment of an electrically thick circular microstrip antenna with an air gap. Based on the free space electric dyadic Green’s function, the field expression of an horizontal electric dipole (HED), which is located at any point of the multilayer media and points in any direction, has been derived. By using this field expression and the Richmond reaction equation, an integral equation in terms of electric current on the patch is formulated. By properly choosing current expansion modes, this method can be used for an electrically thick microstrip antenna. The theoretical results agree very well with experimental data for an electrically thick circular microstrip antenna with an air gap.
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Li, L., Yuan, Y. & Ronglong, L. Input impedance of microstrip antenna with thick multilayer substrate. J. of Electron.(China) 7, 200–206 (1990). https://doi.org/10.1007/BF02778420
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DOI: https://doi.org/10.1007/BF02778420