CONCLUSIONS
We demonstrate in this paper a printed antenna that can reach the frequency bandwidth requirement for WLAN/WiMax and discuss the influence of the gap values between two radiators and the copper size of parasitic capacity on the return loss value. The analogs of the measured and simulated results prove that this proposed antenna has good quality in frequency bandwidth, gain value and low cross-polarization value, that can well be applied to the WLAN/WiMax systems.