A Compactly Arranged 4-Port Antenna Array with High Isolation

A compactly arranged 4-port antenna array with high isolation is presented in this letter. A novel decoupling loop is adopted in this antenna array, this proposed decoupling structure helps with improving the isolation between two adjacent antenna elements and capable of enhancing the bandwidth of the original antenna array. Operation band of this proposed antenna array includes 2.53-3.15 GHz and 5-6.05 GHz. In addition, size of this antenna array is merely 30mm*30mm*0.4mm, which is suitable for its application in cellular devices.