Double ring antenna design for MIMO application in mobile terminals

In this paper, We present a MIMO bezel antenna design composed by a seamless double metal ring structure. The MIMO antenna mainly operates in the loop mode and can cover the majority of globe cellular bands. Good efficiencies (>-4dB) and a low envelope correlation coefficient (<;0.5) are achieved, which ensure a good MIMO performance of our proposed antenna. Moreover, our antenna also performance well in user cases as the loop mode and the seamless structure.