Title :
Effects of ground plane truncation on the impedance of a patch antenna
Author :
Bhattacharyya, A.K.
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada
fDate :
12/1/1991 12:00:00 AM
Abstract :
The surface-wave admittance of a circular patch antenna with finite ground plane dimensions is formulated. The orthogonal relationship between the space wave and various surface-wave modes is invoked to determine the amplitude of a surface-wave mode produced by the equivalent magnetic current of the patch. The surface wave admittance, and hence the input impedance of a patch is found to vary widely with the ground plane size. Numerical results for the input impedance agree well with the measured data which confirms the validity of the formulation
Keywords :
antenna theory; electric impedance; microstrip antennas; circular patch antenna; equivalent magnetic current; ground plane truncation; input impedance; microstrip antenna; space wave; surface-wave admittance; surface-wave mode;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
