In this paper, the techniques proposed in [10, 11] is further applied to design one printed monopole antenna for dual band WLAN applications. The objective of this study is to design one compact printed monopole antenna that can resonant at 2.4 and 5.2GHz WLAN frequencies. The proposed monopole antenna has only one resonant element and the dual band operation is achieved by embedding one chip inductor of 20nH to bring down the resonant modes of the original antenna. Compared to the case that there is no inductor embedded, it is observed that with the existence of the chip inductor, the lowest resonant frequency of the antenna can be reduced by more than 37%. The proposed antenna has a C-shaped structure and the size of this antenna is only 15×8.6mm2. Simulation results indicate that this proposed antenna has moderate gain and high radiation efficiency.