A high-isolated wideband two-port MIMO antenna for 5G millimeter-wave applications

Fifth-generation (5G) technology is extremely important in the current context since it seeks to fix the shortcomings of its predecessors, the 4G generation. To achieve this goal, this project entails constructing a small ultra-wideband (UWB) MIMO antenna featuring an anti-parallel layout, designed for operation within the millimeter-wave spectrum. Moreover, the investigation scrutinizes and fine-tunes the mutual coupling interaction between the two elements in detail. The presented MIMO antenna occupies a small footprint of 6 × 17.37 mm2. Despite its compact dimensions, this MIMO antenna provides an impressive isolation of 65 dB, attributed to the adequate inter-element spacing and the anti-parallel arrangement. Additionally, the integration of a defected ground structure (DGS) enhances isolation by approximately 20 dB. Furthermore, the proposed MIMO antenna demonstrates a satisfactory gain of approximately 6 dBi, boasting high efficiency surpassing 96 %, and lying between 34.1 and 39.7 GHz. The proposed antenna has undergone simulation and analysis utilizing both the High-Frequency Structure Simulator (HFSS) and Computer Simulation Technology (CST) in order to confirm its utility. Based on these findings, the suggested MIMO antenna appears to be well-suited for compatibility with 5G communication systems, specifically covering the n260 band (37–40 GHz) and the Ka-band. •MIMO antennas play a crucial role in 5G applications by increasing the data rate and ensuring that the communication system operates efficiently, helping to enhance signal quality, reduce interference, and ensure compliance with regulatory standards.•In this paper we proposed a MIMO antenna for 5G wireless communication:•a compact ultra-wideband (UWB) MIMO antenna featuring an anti-parallel layout is designed for operation within the millimeter-wave spectrum.•The presented MIMO antenna occupies a small footprint of 6 × 17.37 mm2.•Despite its compact dimensions, this MIMO antenna achieves an impressive isolation of 65 dB, attributed to the adequate inter-element spacing and the anti-parallel arrangement.•The proposed MIMO antenna demonstrates a satisfactory gain of approximately 6 dBi, along with high efficiency surpassing 96 %.•The proposed antenna covers the frequency band ranging from 34.1 GHz to 39.7 GHz.•The proposed antenna could be well-suited for 5G applications.•The proposed antenna'return loss is validated through CST software to validate its effectiveness.