slotted and rectangular patch. However, the return loss level of 2nd resonant frequency is altered by the coupling effect. Also, the parameter Lp1 has been varied (Ws1 = 63.5 mm, Ls2 = 33 mm) in the order to observe the effects on the return loss. As result shown in Fig.4(c), the 3rd resonant frequency shifts to lower frequency as increasing Lp1 due to the extending electrical length of Hilbert fractal slot.