![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
ABSTRACT
In this paper, a meander monopole antenna array based electromagnetic band gap (EBG) structure is proposed for MIMO applications. For this, two monopoles of a meander structure are printed on an FR4 substrate of 1.6 mm thickness and fed with 50Ω microstrip lines. The ground plane is defected with EBG Hilbert shaped inclusions of the 3rd order on the substrate back profile within a limited array size. This is achieved by having a negative refractive index (NRI) to reflect the surface waves totally away from the space filling between the antenna elements. Such property occurs only when the EBG defect operation is combined with the EBG slots. To realize the proposed design performance, a Finite Integral Technique (FIT) of CST Microwave Studio (CSTMWS) numerical analysis is invoked. Nevertheless, another numerical simulation based on Finite Element Method (FEM) based HFSS simulations is conducted to validate the regarded results. The proposed antenna design is fabricated to achieve excellent matching bandwidths, S11<−10 dB, around 2.45 GHz. The proposed antenna radiation pattern is found in the side direction of the array with a gain of 2.1dBi at 2.45 GHz. The proposed antenna axial ratio (AR) is tested and found to be below 3 dB at 2.45 GHz; that makes the antenna subject for circularly polarized radiator. Such achievement is attributed to the effect the fractal structure additions. Finally, the maximum mutual coupling between the antenna elements within a distance of 0.16λo at 2.45 GHz is bellow −30 dB at the two frequency bands of interest.
Additional information
Notes on contributors
Zainab Al-Dulaimi
Zainab J M AL-Dulaimi was born in Al-Anbar/ Iraq in 9th of September 1992. She received her BSc in communication engineering in 2014 from Al-Mammon University College in Baghdad/ Iraq. She finished her MSc degree in electrical and computer engineering in 2019 from Altinbas University in Turkey. Her main field of research is in microwave antenna design for modern wireless communication systems. Email: [email protected]
Taha A Elwi
Taha A Elwi received his BSc in Electrical Engineering Department (2003) (Highest Graduation Award), postgraduate MSc in Laser and Optoelectronics Engineering Department (2005) (Highest Graduation Award) from Nahrain University Baghdad, Iraq. From April 2005 to August 2007, he was working with Huawei Technologies Company, Baghdad, Iraq. On January, 2008, he joined the University of Arkansas at Little Rock and he obtained his PhD in December 2011 from the system engineering and science. His research areas include wearable and implantable antennas for biomedical wireless systems, smart antennas, Wi-Fi deployment, electromagnetic wave scattering by complex objects, design, modeling and testing of metamaterial structures for microwave applications, design and analysis of microstrip antennas for mobile radio systems, precipitation effects on terrestrial and satellite frequency re-use communication systems, effects of the complex media on electromagnetic propagation and GPS. The nano-scale structures in the entire electromagnetic spectrum are a part of his research interest.
Dogu Cagdas Atilla
Dogu Cagdas Atilla received PhD degree in electrical and electronics engineering in 2017 from Istanbul University and was employed as an instructor in Electrical and Electronics Engineering Department and on number of Scientific Research Projects in Istanbul University between 2009-2018. Also he worked as a full-time teaching assistant in Isik University between 2012-2017. His main fields of interest are defense electronics, wide-band antenna design, tunable amplifiers, and RF hardware. He is currently holding five patents and employed as an assistant professor at Altinbas University started in 2017. He has a role of PhD coordinator at this institute and is the director of electrical sub-team of EVA (Electrical Vehicle of Altinbas) in efficiency car challenge of Turkey. Email: [email protected]