The first step of the design procedure is started by
designing a single element. This element is a rectangular
microstrip patch of one branch which is called a driven
element. It is designed to operate at a resonant frequency, fr =
5.8 GHz using Flame Retardant 4 (FR-4) substrate material.
The dielectric constant of the substrate is εr = 4.7, the tangent
loss 0.019 and thickness of the substrate h = 1.6 mm. The
physical width and length dimensions of the driven patch
element are calculated using following equations.