Ojo Rasheed

Work place: College of Pure and Applied Sciences, Department of Computer Science, Caleb University, Imota, 106102, Lagos, Nigeria

E-mail: drojorasheed@gmail.com

Website: https://www.researchgate.net/profile/Ojo-Rasheed

Research Interests: Antenna Design, Antenna Technology, Frequency Selected Surface, Computer Science & Information Technology, Metamaterial


Ojo Rasheed was born in Ibadan Oyo State Nigeria. He received his PhD in communication engineering from Universiti Malaysia Perlis (UniMAP) in 2019, individually; he obtained his MSc from the same university back in 2014. He received BSc in Information Technology from Al-Medina International University Shah Alam KL Malaysia in 2013. Currently, he works as a lecturer in the College of Pure and Applied Sciences, Department of Computer Science, Caleb University, Imota, Lagos, Nigeria. He is reputable for developing web-based applications, implementing ICT to drive communication systems. His research interest includes Metamaterial, Frequency Selected Surface, and Antenna Design.

Author Articles
A Circularly Polarized Planar Dipole with L-Shaped Metamaterial Radome for 5.8 GHz WLAN Application

By Ojo Rasheed Ping Jack Soh Mohd Faizal Jamlos Emmanuel B. Ajulo Adekunle A. Eludire Daniel L. Enosegbe

DOI: https://doi.org/10.5815/ijwmt.2023.06.02, Pub. Date: 8 Dec. 2023

A circularly polarized antenna based on a dual dipole topology is designed in this work. Circular polarization is achieved by placing two pair of parallel dipoles orthogonally and introducing a 90o phase difference between the four arms feeding the dipole using a phase shifter. The two arms of each dipole are located on the opposite sides of the single-layered substrate and fed using a probe feed. Disclosure to the environment can be negatively impact an antenna's radiation aspects and lead to greater. One way to protect these devices is to evaluate the proposed CP antenna with metamaterial radome design, which is closures that can shield antenna while improving the overall performance, by integrated with a metamaterial radome designed based on L-shaped unit cells. The application of this radome improved the impedance bandwidth from 3.9 % (without radome) to 6.3 % and the 3-dB axial ratio bandwidth from 3.2 % to 5.9 %. A prototype of the designed antenna structure is manufactured and measured. The designed and fabricated antenna has a simple structure and does not include disagreeable difficulty of the recently reported Complementary Cross-Dipole Antennas (CCDA). The antenna has a good radiation behavior in the improved desired gain of 4.31 dBi to at least 6.35 dBi due to the contribution of the radome. Design steps for achieving circular polarization and performance improvements are presented and validated experimentally using a fabricated prototype.

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