Abstract: In this paper, we design a compact dual-polarized antenna which can operate at 2. 45 GHz band of wireless local area networks (WLAN). The antenna is composed of double symmetrical structure dielectric plates,the four sides of radiation patch are cut into the convex-shape, which can achieve miniaturization and effectively expand antenna bandwidth. Meanwhile four symmetrical cross slots are cut in the ground plane, it can further broaden the antenna bandwidth, and signif icantly reduce the overall size of the antenna and improve the performance of the antenna radiation. The measured results are obtained: the relative impedance bandwidth of the designed antenna is over 9. 1% (2. 37 ~ 2. 59GHz), the return loss is less than -10dB, the isolation is better than 33dB, and the maximum gain is 3. 63dBi, these results show the designed antenna has wide band and good performance. Moreover, the antenna structure is simple and compact, which is also easier to be fabricated and integrated, and is to be suited for mobile terminal.