Abstract: A novel six- band PIFA antenna is proposed for 4G mobile terminals. In this design，inverted L- shaped，U- shaped and S-shaped radiation patches are used to achieve multi-frequency characteristics；the point that lower than the resonant frequency is achieved to impedance matching by shorted load technology；instead of the traditional direct feed，coupled feed can reduce the imped? ance shake well，and get a wider band. The antenna’s size is only 70 mm×16 mm×1.5 mm，and this antenna can cover the six-band mo? bile communications：LTE700，CDMA/GSM850，GSM900，DCS1800，PCS1900，WCDMA/UMTS2100. The results show that in the working bands，S11 is less than or equal to -6 dB，VSWR is less than or equal to 3. The proposed antenna meets the engineering require? ments，and its good performance verifies the feasibility of the design.