One of the vast evolution of wireless technology is WiMAX
technology. The frequency band of WiMAX in Indonesia is 2.3 GHz
(2.3-2.4 GHz) and 3.3 GHz (3.3-3.4 GHz). Antenna is one of the most
important component in wireless communication. Due to the
presence of two frequency bands of WiMAX used in Indonesia, there
is a need to develop an antenna that can operate in both frequencies.
This paper discusses the design of coplanar waveguide (CPW) fed
octagon shaped microstrip antenna. The antenna microstrip design
uses FR4 substrate with dielectric constant of 4.6. The antenna
dimension is 30 mm x 45 mm. From the simulation results, it can be
seen that the antenna design proposed by the author has a wide
bandwidth that includes frequency band of 2.3 GHz and 3.3 GHz.
The antenna gain falls between 1.8 – 2 dBi with omnidirectional
radiation pattern.