Abstract
This paper exhibits a low profile dual-polarized MIMO antenna with high isolation to meet the requirements of 5G smartphones. The integration between a vertically polarized slot and a horizontally polarized slot is investigated and applied for 28 GHz dual-polarized smartphone antenna. The antenna is combined with metasurface (MTS) to achieve high gain and more directivity. In order to design the metasurface, the characteristic mode analysis is used to investigate the performance of MTS at 28 GHz. The proposed antenna achieves high isolation coefficients better than 40 dB and cross polarization lower than -40 dB from simulated and measured results. The isolation between elements is achieved without any additional decoupling techniques. The proposed MTS slot antenna operates with 4 GHz bandwidth (26-30 GHz) with a realized gain of 11 dBi and efficiency of 90%. Four antennas (with eight ports) are positioned orthogonally at the corners of the mobile PCB to serve MIMO for 5G applications. The effect of MIMO antenna on the human is taken into consideration in power density term. Furthermore, the housing and components of smartphones are taken into our consideration in this paper.
Highlights
Nowadays, the communication systems have been developed rapidly and attract the researchers due to its new features such as high data rate, wide bandwidth, high resolution, heterogeneous services, virtual networks, provide hugely broadcasting data, and fast action
There are different bands such as sub 3 GHz, sub 6 GHz and millimeter bands that are recommended for 5G applications
In this paper, a dual-polarized MIMO antenna with eight elements is introduced for 5G smartphone
Summary
The communication systems have been developed rapidly and attract the researchers due to its new features such as high data rate, wide bandwidth, high resolution, heterogeneous services, virtual networks, provide hugely broadcasting data, and fast action. The surface currents and electric field of the proposed antenna at 28 GHz for the two ports are presented to ensure that the proposed antenna achieves dual-polarization between their ports. To examine the metasurface modal behaviors, the first ten modes are calculated (Eigenvalues, characteristic angles, and modal significances) in the range from 18 GHz to 38 GHz as shown in Figure 13 (a)-(c). These are unacceptable modes according to (6) and the theory of mode expansion
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