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Abstract
In this paper, a novel ultrawideband (UWB) four ports multiple-input multiple-output (MIMO) antenna was developed. The MIMO antenna is based on four wideband circular monopoles with inscribed Fibonacci circles in order to reduce the size and stabilize the impedance over a wider bandwidth. The array shows a frequency bandwidth from 3.6 GHz to 13.8 GHz, obtaining inter-port coupling below −15 dB over the entire bandwidth. Convergent TARC curves over the entire bandwidth exhibit values less than −25 dB and high stability against phase changes in the incoming signals to the different radiators. Finally, the UWB MIMO antenna proposed generates a quasi-omnidirectional radiation pattern with orthogonal properties among radiators, demonstrated by a very small Envelope Correlation Coefficient (ECC) value, averaging 0.005.
Acknowledgment
This work was supported by project UAM-EL002-20.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Funding
Notes on contributors
E. A. Andrade-González
E. A. Andrade-González received his Bs.D. in Electronics and Communications from Universidad Autónoma Metropolitana in '95, and currently he is pursuing his M. Sc. In Electrical Engineering. Mr. Andrade has been working at Universidad Autónoma Metropolitana- Azcapotzalco in the Telecommunications Area. His research interests are antenna, LNA and RF circuit design.
J. A. Tirado-Méndez
J. A. Tirado-Méndez received the BS degree in electronics and digital systems from Metropolitan Autonomous University (UAM)-Azcapotzalco, Mexico City, in 1999, and the MSc and PhD degrees in telecommunications from the CINVESTAV-IPN, Mexico, in 2001 and 2008, respectively. In 2002, he joined the Telecommunications Section, CINVESTAV, as a Researcher. In 2005, he joined the Electronics Department, UAM-Azcapotzalco. In 2011, he joined the National Polytechnique Institute as Full-Professor. His research interests are electromagnetic compatibility and nonlinearities as well as RF and microwave circuit design, antennas and microstrip filters. He has published more than 50 JCR papers and more than 20 proceedings papers. Dr. Tirado-Méndez received the Arturo Rosenblueth Award in 2009 for the Best PhD Engineering Thesis in CINVESTAV. He has level I in the SNI of Mexico Hildeberto Jardon-Aguilar.
H. Jardón-Aguilar
H. Jardon-Aguilar was born in Tenancingo, Hidalgo, Mexico, in 1949. He received the B.S. degree in electrical engineering from ESIME-Inst. Politecnico Nacional (IPN), San Pedro Zacatenco, Mexico and the Ph.D. degree in radiosystems from the Moscow Technical University of Telecommunications and Informatics, Moscow, Russia. He is a Full Professor at the Center of Research and Advanced Studies, IPN, CINVESTAV, since 1985. His research interests include analysis of nonlinearities in RF and microwave circuits, electromagnetic compatibility and photonic systems. He is the author of five books and more than 100 technical papers in journals and symposiums. Prof. Jardon-Aguilar is a member of the Popov Society and has level III in the SNI of Mexico.
M. Reyes-Ayala
M. Reyes-Ayala received the B.S.E.E. degree from Metropolitan Autonomous University (UAM), Mexico City, Mexico, in 1994 and the M.S.E.E. degree from Inst. Politecnico Nacional (IPN), CINVESTAV, San Pedro Zacatenco, Mexico, in 2005. From 1994 to 1996, he was a Department Head at AEG Mexicana, Mexico City. In 1999, he joined the Electronics Department, UAM, where he has been engaged in studies on digital satellite communication and propagation models for radio communication systems. His research interests are also in theoretical analysis in satellite interference phenomena.
A. Rangel-Merino
A. Rangel-Merinoa has received the Bachelor Degree in Telecommunications and Electronics Engineering in 1981 from the School of Mechanical and Electrical Engineering (ESIME) of the National Polytechnic Institute of Mexico (IPN), the Master in Science degree in Automatic Control by the Center for Research and Advanced Studies of IPN in 2001 and the PhD degree in Telecommunications and Electronics by the Section of Graduate Studies and Research (SEPI) of the National Polytechnique Institute in 2013. Since 2005, he is a member of EMC research group ESIME Zacatenco of the Polytechnic of Mexico and participates in the projects of the Electromagnetic Compatibility Laboratory (LabCEM) of ESIME Zac. He has directed four Bachelor Thesis and, currently, he is professor at ESIME Zacatenco. He is awarded with Candidate Level in the SNI, México.
Michael Pascoe-Chalke
M. Pascoe-Chalke received the Bs D. in Electromecanic Engineering in 1997, the M. Sc. And Ph.D. in Electrical Engineering in 2005 and 2010, both cum laude, all of them from the Universidad Nacional Autónoma de México. Currently, he is Assistant Professor at Universidad Autónoma Metropolitana, campus Iztapalapa. His research interest are wireless networks (WPAN, WLAN, WMAN, and WSN). Mobility design and analysis, wireless tracking systems. He is level 1 in the SNI in Mexico.