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The effect of various parameters of circular microstrip antennas on their radiation efficiency and the mode excitation

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2 Author(s)
A. Kishk ; University of Manitoba, Winnipeg, Manitoba, Canada ; L. Shafai

The numerical solution of circular microstrip antenna is carried out using the method of moment. The effect of the probe position, The dielectric permittivity of the substrate, and the substrate thickness on the radiation pattern and the mode excitation efficiency are studied. It is found that the probe position and the patch size can be used to control the mode excitation efficiency, and heigher order modes can be generated using only one feed location. Also, the finite ground plane can be used to improve the symmetry of the radiation patterns. The technique is general and can be used to investigate other scattering and antenna problems involving axisymmetric geometries.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:34 ,  Issue: 8 )