Loading directors to micro-strip dipole antenna, a highgain(directradiation) and compact differential micro-strip antenna is presented consequently. Mentality and procedure of the antenna design are give. The antenna is also manufactured and tested. Results show that the return loss is matched well with the simulational results within 2—3 GHz,and the maximum gain can reach to 8 dB at 2.45 GHz. Moreover, the result of fault-tolerant analysis indicates that the antenna has strong stability .With the advantages of high gain, strong directionality and small size, the antenna can be applied to the fourth generation mobile communication or WLAN.