Vol. 116

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2021-10-09

Highly Isolated Two-Elements Ultra-Wideband MIMO Fractal Antenna with Multi Band-Notched Characteristics

By Yong Cai, Guangshang Cheng, Xingang Ren, Jie Wu, Hao Ren, Kaihong Song, Zhi-Xiang Huang, and Xian-Liang Wu
Progress In Electromagnetics Research C, Vol. 116, 13-24, 2021
doi:10.2528/PIERC21080401

Abstract

This work presents high isolation UWB-MIMO antenna with a bandwidth of up to 8.6 GHz based on a Minkowski fractal structure. The proposed antenna is fed by microstrip and be comprises two orthogonal monopole antennas, which delivers a decent isolation effect. Moreover, the ground is designed as two separated blocks with an I-shaped branch for improving the isolation degree between the units. The resultant isolation degree of this antenna is greater than 25 dB. Besides, the electromagnetic interference in the partial frequency band (such as Wi-Max band (3.45-4.45 GHz), WLAN band (5.1-5.8 GHz) and X-band (7.25-7.75 GHz)) is further prevented through etching a split-ring resonator (SRR) and C-slot on the unit. The antenna reflection coefficient of the UWB-MIMO antenna at the notch is 3.5 dB, which indicates that the antenna has a conspicuousness anti-interference effect. Through the above judicious design, the proposed UWB-MIMO antenna possesses a relative bandwidth of 113% (up to 8.6 GHz), and the envelope correlation coefficient between antenna units is less than 0.005, and the antenna radiation efficiency is up to 80%. The results indicate that the proposed MIMO antenna meets UWB applications.

Citation


Yong Cai, Guangshang Cheng, Xingang Ren, Jie Wu, Hao Ren, Kaihong Song, Zhi-Xiang Huang, and Xian-Liang Wu, "Highly Isolated Two-Elements Ultra-Wideband MIMO Fractal Antenna with Multi Band-Notched Characteristics," Progress In Electromagnetics Research C, Vol. 116, 13-24, 2021.
doi:10.2528/PIERC21080401
http://jpier.org/PIERC/pier.php?paper=21080401

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