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ABSTRACT
A defected ground structure (DGS) loaded with meandered lines is proposed to reduce mutual coupling of a dual-band planar multiple-input multiple-output (MIMO) antenna. To verify the effectiveness of a proposed DGS, a dual-band MIMO antenna is designed and manufactured. The antenna consists of two planar-inverted F-antenna (PIFA) elements printed symmetrically for dual-band operation. The DGS is placed between these two PIFA elements to reduce mutual coupling. The DGS consists of a slot and a pair of meander lines inside it, hence generating two independently tuneable resonances. A two element MIMO antenna is studied using computer simulation and a final design is manufactured. The antenna is measured using the Satimo Starlab system. Simulation results show that the MIMO antenna has the bandwidths (S11 & S22<−10 dB, S21 & S12<−15 dB) of 1.56–2.71 GHz (1.15 GHz or 54%) and 4.82–5.9 GHz (1.08 GHz or 20%) in the lower and higher frequency bands, respectively. Measurement results agree well with the simulation.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Qinlong Li
Qinlong Li was born in Shanxi, China, in 1988. He received the B.S. degree from Xi’an Jiaotong University, Xi’an, China, in 2010, the M.S. degree from the University of Chinese Academy of Sciences, Beijing, China, in 2013, and the Ph.D. degree from the University of Hong Kong, Hong Kong, in 2018. He joined the electromagnetics and communication laboratory, Xi’an Jiaotong University, in 2019, as a lecturer. His current research interests include Antenna design, metamaterial theory and design.
Muhammad Abdullah
Muhammad Abdullah received the B.S degree in Telecommunication Engineering from the University of Engineering and Technology Peshawar, Pakistan, in 2016. He is currently pursuing the M.S. degree in Information and Communication Engineering with Xi'an Jiaotong University China. He is also associated with Electromagnetics and Communication Laboratory at Xi’an Jiaotong University as a research scholar. His research interests include antenna design for different applications.
Xiaoming Chen
Xiaoming Chen received the B.Sc. degree in electrical engineering from Northwestern Polytechnical University, Xi’an, China, in 2006, and M.Sc. and PhD degrees in electrical engineering from Chalmers University of Technology, Gothenburg, Sweden, in 2007 and 2012, respectively. From 2013 to 2014, he was a postdoctoral researcher at the same University. From 2014 to 2017, he was with Qamcom Research & Technology AB, Gothenburg, Sweden. Since 2017, he has been a professor at Xi’an Jiaotong University, Xi’an, China. His research areas include MIMO antennas, over-the-air (OTA) testing, reverberation chambers, and hardware impairments and mitigation. He serves as an Associate Editor (AE) for the journal of IEEE Antennas and Wireless Propagation Letters and received the outstanding AE award in 2018. He was also a Guest Editor of a Special Issue on “Metrology for 5G Technologies” in the journal of IET Microwaves, Antennas & Propagation. He received the URSI (International Union of Radio Science) Young Scientist Awards in 2017 and 2018.