A Novel High Isolation Orthogonally CPW-Fed UWB MIMO Antenna for Future IoT Applications

Muhammad Zahid; Nirman Bhowmike; Zaeem Mazhar; Asma Ejaz; Sultan Shoaib; Yasar Amin

Authors

Muhammad Zahid 1Department of Telecommunication Engineering, University of Engineering and Technology, Taxila, Pakistan
Nirman Bhowmike Department of Electrical Engineering, Lamar University, Beaumont, TX 77705, USA
Zaeem Mazhar 1Department of Telecommunication Engineering, University of Engineering and Technology, Taxila, Pakistan
Asma Ejaz 1Department of Telecommunication Engineering, University of Engineering and Technology, Taxila, Pakistan
Sultan Shoaib Department of Engineering, Gulf University for Science and Technology, Hawally 32093, Kuwait
Yasar Amin 1Department of Telecommunication Engineering, University of Engineering and Technology, Taxila, Pakistan

Keywords:

CPW, UWB, MIMO, Internet of Things, High Isolation

Abstract

The work presents a unique two-element high-isolation orthogonally CPW-fed ultra-wideband (UWB) Multiple-Input Multiple-Output (MIMO) antenna. The antenna is supported by the 52.8 × 29 mm² FR-4 substrate, which has a dielectric constant of 4.3 and a thickness of 1.6 mm. The suggested MIMO antenna reduces mutual coupling by separating the two orthogonal single UWB antennas by using a parasitic element. The suggested antenna achieves a voltage standing wave ratio (VSWR) of less than two and more than 86% radiation efficiency over the entire operating frequency range. The antenna performance was assessed using both simulation and experimental measurements. The antenna demonstrates good performance in terms of return loss, isolation (> −20 dB), radiation efficiency (86%), peak gain (4.9 dBi), envelope correlation coefficient (< 0.0015), and voltage standing wave ratio (VSWR). The proposed antenna was evaluated using CST Microwave Studio. The antenna prototype model is constructed, tested, and measured to validate the simulation return-loss results. There is good agreement between the measured and simulated results.

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