A 100 x 100 mm ground plane is located on the reverse side of the substrate. Note that a 125Ω impedance transformation is used within the transmission line to enable the wide 30Ω feed lines to be connected directly to the edge of the radiating patch, and not be inset into the radiating patch. With this configuration a dual or circularly polarized printed antenna can be developed with the addition of an orthogonal feed line.