Multiband LTE/WWAN phone antennas

Our group works in the eara of phone antennas in recent years will be reviewed. Firstly, some multiband single phone antennas will be presented, especially where the narrow-frame antenna is firstly proposed for the large touch-screen phone applications. Then, some decoupled antennas for LTE MIMO phone applications will be demonstrated, where two different decoupled techniques including well-designed protruded ground and neutralization line are used. Finally, two multiband antennas for metal-ring phone applications are proposed.