In this paper, the ring radiator circumference of
the first iteration designed approximately one free space
wavelength (A.o) at the operating frequency of 2.45 GHz is
presented with the line width of ring radiator parameter WL.
Therefore, the antenna was implemented on an economical
FR4 substrate with thickness of 1.6 mm, relative permittivity
of 4.1 and loss tangent of 0.019. Especially, the presented
antenna with the dimensions of 32.5 x 44.1 mm2 is fed by the
50 Q microstrip feed line on the top layer of the substrate.