A UWB MIMO slot antenna using defected ground structures for high isolation
Enhao Wang, Weimin Wang, Xiaohua Tan, Yongle Wu, Jinchun Gao, Yuanan Liu
Abstract
In this article, a multiple-input-multiple-output (MIMO) antenna with high isolation is proposed for ultrawideband (UWB) applications. The proposed MIMO antenna consists of two symmetric slot antenna elements with quasi F-shaped radiators and L-shaped open-slots to increase impedance bandwidth. To improve isolation at the lower band, a decoupling network, composed of a narrow slot and a fork-shaped slot, is introduced in the common ground. The measured results show that the proposed antenna provides high isolation of better than 20 dB over the operating band from 3 to 10.9 GHz. The performances of the UWB MIMO antenna in terms of radiation patterns, peak gain, envelope correlation coefficient, mean effective gain, and diversity gain are also studied.