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ABSTRACT
This paper presents compact and low profile microstrip monopole antenna using composite right/left-handed transmission line (CRLH-TL) structures, which has multiband performance. The physical size of the antenna is 30 mm×30 mm×1.6 mm. The antenna is simulated utilizing the CST CAD tool, and the circuit model of the antenna is designed using ADS software. The simulated reflection coefficient of ADS is in good compromise with the CST. Also, the antenna is fabricated and the simulation and measurement results are in good agreement with each other. The proposed antenna with two unit cells has good reflection coefficient and quasi-omnidirectional patterns with the peak gain of 3.43 dBi at 8.37 GHz and the radiation efficiency of 70% at 2.4 GHz and 4.58 GHz. Also, the antenna with three unit cells has the peak gain of 5.2 dBi at 4.19 GHz and the efficiency of 85% at 3.04 GHz that covers WiMAX/WLAN/ITU bands.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Nahid Khalili Palandi
Nahid Khalili Palandi received the B.Sc. degree in Electrical Engineering from Iran University of Science & Technology, Tehran, Iran, in 2013 and the M.Sc. degree in Telecommunication Engineering from Shiraz University of Technology, Shiraz, Iran, in 2017. Her research interests include antenna, microwave circuits and metamaterials.
Najmeh Nozhat
Najmeh Nozhat received the B.Sc. degree in Telecommunication Engineering from Shiraz University, Shiraz, Iran, in 2004, the M.Sc. and Ph.D. degrees from K. N. Toosi, University of Technology, Tehran, Iran, in 2007 and 2012, respectively. She has been doing her research as a part of her Ph.D. degree in the Center of Ultrahigh Bandwidth Devices for Optical Systems, University of Sydney. She is currently an Associate Professor at Shiraz University of Technology, Shiraz, Iran. Her research interests include nano-optics and nanophotonics, plasmonic devices, nonlinear optics, photonic crystals and metamaterials. Dr. Nozhat is a member of IEEE and OPSI.
Raheleh Basiri
Raheleh Basiri received the B.Sc., M.Sc. and Ph.D. degrees in Telecommunication engineering from Shiraz University, Shiraz, Iran, in 2005, 2008 and 2014, respectively. Since 2015, she has been an Assistant Professor with the Electrical Engineering Department, Shiraz University of Technology. Her research interests include numerical methods in electromagnetic theory, microwave circuits, electromagnetic wave interactions with special materials, and metamaterials.