In recent years, the demand of users to transmit/receive information between PCs through the multi-path fading channels has increased rapidly. In addition, the requirement of high data rate communication has encouraged wireless local area network(WLAN) service and speeded up the development of MIMO system. Because of these reasons, much effort have been devoted to the design of small, multi-band,compact MIMO antenna. Many small dual-band antenna have been proposed in the literature [1]-[3] for WLAN system application.