Gunavathi dan S. Raghavan [2], however the operating
frequency only operates at 5 GHz upwards. Hence, it can not
be used in WiMAX application in Indonesia. Research on
microstrip antenna with octagonal shaped patch was done by
Cheng-Hsing Hsu et al. [3] However, its lowest antenna
frequency was around 3 GHz without CPW fed. Monopole
wideband CPW fed microstrip antena was studied by K. P.
Ray and S. Tiwari [4]. However, the hexagonal shaped patch
and its relatively large size is not suitable for mobile
appliances usage.