A MIMO LTE antenna system with decoupling elements for smart phone application

A MIMO LTE antenna system with decoupling elements for smart phone application is presented in this paper. The MIMO LTE antenna system consists of two coupling-fed antennas and two decoupling elements that all assembly on a smart phone PCB board. The proposed main and diversity LTE antennas are respectively located on the top and bottom of PCB board with the same size. Both main and diversity antennas radiation efficiency all can reach 40% above and can cover 700/850/900/1800/1900/2100/2300/2500 bands requirement. Two decoupling elements are respectively located along the two vertical sides of PCB board. By suitable arrangement and design, the isolation can keep under -10 dB and the envelope correction coefficient (ECC) performance less than 0.5 between main and diversity LTE antennas. All simulation data had been simulated by SEMCAD software tool [1], the measured results are shown to illustrate the decoupling elements can effective achieve higher isolation capabilities of the proposed antenna structure.