Microstripline-fed cylindrical slot antennas

The characteristics of a microstripline-fed cylindrical slot antenna are presented. The integral equation, which involves spectral domain Green's functions and unknown slot electric field, is numerically solved using the method of moments. Computed results are compared with a slot antenna on a planar surface to demonstrate the validity and accuracy of the method. The effects of the size of the cylinder on the input impedance and far-field pattern are investigated.