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2019-08-18

A Compact Dual Band-Rejected MIMO Vivaldi Antenna for UWB Wireless Applications

By Deng-Hui Li, Fu-Shun Zhang, Li-Xin Cao, and Yi Zhao
Progress In Electromagnetics Research Letters, Vol. 86, 97-105, 2019
doi:10.2528/PIERL19062506

Abstract

In this paper, a novel compact dual band-rejected ultra-wideband (UWB) multiple-input multiple-output (MIMO) Vivaldi antenna is introduced and fabricated. The MIMO antenna with a small size of 26 × 28 mm2 contains a modified ground plane and two microstrip-slot balun structures. A T-slot is etched on the ground to achieve miniaturization and high isolation, and the simulated |S11| of -10 dB impedance bandwidth is from 2.7 to 10.9 GHz. An isolation of better than 15 dB is acquired over the UWB range (3.1-10.6 GHz). Meanwhile, by introducing two split ring resonator (SRR) slits on the ground and adding two split ring resonators (SRRs) close to the microstrip-slot balun structures, dual band rejection at both WLAN (5.15-5.85 GHz) and IEEE INSAT/Super-Extended C-band (6.7-7.1 GHz) can be achieved. The MIMO antenna has high gain and very low envelop correlation coefficient (ECC < 0.02). The measured results agree with the simulated ones, demonstrating that the UWB MIMO Vivaldi antenna is suitable for the UWB diversity applications.

Citation


Deng-Hui Li, Fu-Shun Zhang, Li-Xin Cao, and Yi Zhao, "A Compact Dual Band-Rejected MIMO Vivaldi Antenna for UWB Wireless Applications," Progress In Electromagnetics Research Letters, Vol. 86, 97-105, 2019.
doi:10.2528/PIERL19062506
http://www.jpier.org/PIERL/pier.php?paper=19062506

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