Tunable Main LTE $4\times 4$ MIMO Antenna for Future Smartphone Application

In this paper, a tunable main LTE 4×4 MIMO antenna array operate in 700M-960MHz ( 2×2 MIMO) and 1710MHz-2690MHz 4×4 MIMO) is presented. The dimension of designed mobile phone simulation model is 150 mm×75 mm×6 mm. To cover more operating bands with compact antenna volume, the reconfigurable technique is therefore applied by inserting an RF switch at the end of the proposed antenna to improve bandwidth at the low band.