A novel LTE MIMO antenna with decoupling element for mobile phone application

A novel multiple-input and multiple-output (MIMO) antenna system combined with decoupling element for enhancing the port isolation between two antennas at triple Long-Term Evolution (LTE) bands is presented in this paper. For compact single antenna, an orthogonal strip layout design is used to build a single antenna with its dimension 14 × 15 × 3.2 mm³ only. A spiral decoupling structure is added between two strongly coupled antennas to enhance the port isolation. The isolation within three desired bands could be improved to all below -20 dB. With the aid of the proposed decoupling element, the interference between two antennas could be minimized.