Decoupling and bandwidth equalization for MIMO antennas by using novel network design

Abstract

AbstractThis paper proposes a novel decoupling and matching technique to enhance port isolation and broaden their common operating bandwidth for asymmetric antenna arrays. The original antennas have strong mutual coupling and a large inconsistency of bandwidths. After adding the proposed network, the coupling has been suppressed and their operating bandwidths have been equalized. To verify this technique, a reference and proposed antenna arrays with element spacing of 0.1506 ( is the wavelength in free space at the center frequency point) are simulated and fabricated. In the experiment, the port isolation is improved by about 23.7 dB at the center frequency. Their bandwidths with a reflection coefficient of −15 dB are also equalized. The common bandwidth is enhanced by about 110.63%. The proposed antenna array has potential application value in modern wireless communication.