5G millimeter wave wideband MIMO antenna arrays with high isolation

Abstract

In this paper, a compact two-port MIMO antenna array system is described. The antenna array spans the range from 27 to 40 GHz, whereas the impedance of the antenna element is matched at 50 Ω. The gain of the antenna element is between 5.5 and 8.5 dBi, and its radiation efficiency is between 65 and 90%. With high impedance matching for 5G MMW (Millimeter Wave), particularly at 28 GHz and 38 GHz, the 2-port antenna array operates in the frequency range of 27–40 GHz. The suggested MIMO array operates effectively with a gain of approximately 10 dBi and a radiation efficiency of approximately 95%. The antenna array's overall dimensions are a length of 55.27 mm, a width of 27.635 mm, and a depth of 1.6 mm with partial ground. A FR-4 substrate is used in the antenna's fabrication, greatly reducing the cost. In the antenna array, a decoupling surface is used between the antennas, with orthogonality being maintained between the ports to reduce mutual coupling. The results of the modelling show a reduction in the measured mutual coupling between array ports of less than − 35 dB. An envelope correlation coefficient (ECC) of less than 1 × 10–4 is preferable. Additionally, the channel loss capacity is less than 0.3 bits/s/Hz, the mean effective gain is approximately − 6 dB, and the total active reflection coefficient is upgraded to be less than − 30 dB. Moreover, a diversity gain of approximately 10 dB is achieved. The proposed construction was created using CST Microwave Studio 2019. When the antennas are constructed and tested, the experimental outcomes surpass those of the simulation. Each antenna element is 27.635 mm long, 27.635 mm wide, and 1.6 mm thick. Slots in the radiating circular patch antenna element could be used to improve the radiation characteristics across the intended bands. The parametric study specifies that the distance between the antenna elements should be 0.5 λ, where λ is the operational wavelength.

Design and diversity performance analysis of C shape engraved miniaturised, and high gain Quad-Port MIMO antenna for 5 G and P2P communication

“…By exploiting the spatial dimension of the wireless channel, Antenna diversity enhances system efficacy and decreases fading. The diversity gain, denoted as DG, can be determined by employing equation (6) [60]. DG is The methodology for calculating the Mean Effective Gain (MEG) is detailed in reference [37].…”

Design and Performance Evaluation of a 6×6 MIMO Array with Partial Ground Plane for Sub-6 GHz Mobile Applications

“…Another study [4] introduces a dual-element MIMO array specially designed for smartphones. This particular antenna boasts a good coverage range, spanning over 400 MHz across two mid sub-6 GHz bandsprecisely, 3.5 GHz and 4.3 GHz.…”

A miniaturized aperture‐coupled 4 × 4 MIMO array SIW antenna at K band

“…There are various isolation improvement structures presented in the literature. [2][3][4][5][6] A 2 × 2 MIMO circular patch is used for wide bandwidth with a decoupling surface to improve isolation. The structure is formed into a MIMO array to improve gain up to 10 dBi.…”

“…The structure is formed into a MIMO array to improve gain up to 10 dBi. 2 A 4 × 4 MIMO with defected ground structure is implemented at 25. 5-29.6 GHz to improve isolation with a peak gain of 8.3 dBi in Khalid et al 3 With isolation of 12 and 32 dB, a dual-band transparent antenna for wireless MIMO system applications is designed in Desai et al 4 For sub-6 GHz applications, a transparent two-element 5G MIMO antenna is designed with a separate ground for each antenna to achieve isolation of 15 dB with complex fabrication.…”