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

This is the authors' abstract. We don't add key points for this paper.

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.