A Compact Multi-resonant Wide Band MIMO Antenna for 5G Communication Systems at mm-wave Band

Authors El Arrouch Tarik1, Najiba El Amrani El Idrissi1, D. Kumutha2, S. Jeevitha3, Sudipta Das4

1Faculty of Sciences & Technologies, Signals, Systems and Components Laboratory, Sidi Mohamed Ben Abdellah University, Fez-Morocco

2Department of Biomedical Engineering, Karpagan Vinayaga College of Engineering and Technology, Chengalpattu, India

3Department of Electronics and Communication Engineering, Sri Venkateswara College of Engineering and Technology (SVCET), Chittoor-517127, AP, India

4Department of Electronics and Communication Engineering, IMPS College of Engineering and Technology Nityanandapur, Malda-732103, West Bengal, India


Е-mail sudipta.das1985@gmail.com
Issue Volume 15, Year 2023, Number 1
Dates Received 11 November 2022; revised manuscript received 14 February 2023; published online 24 February 2023
Citation El Arrouch Tarik, Najiba El Amrani El Idrissi, D. Kumutha, et al., J. Nano- Electron. Phys. 15 No 1, 01026 (2023)
DOI https://doi.org/10.21272/jnep.15(1).01026
PACS Number(s) 84.40.Ba
Keywords MIMO antenna, mm-wave, DGS (3) , Wide bandwidth, 5G applications.

In this paper, a novel compact dual-wide band multiple input multiple output (MIMO) antenna system with a better performance for 5G communications systems at mm-wave frequencies (28/38 GHz) is presented. Firstly, a single element was designed and detailed to resonate at mm-wave band frequencies (28/38 GHz). The basic antenna is a simple circular patch that resonates at 38 GHz. In order to generate the second operating frequency of the proposed antenna, two rectangular inverted L-shaped slots are introduced (Ant II). Furthermore, to improve the impedance matching at desired frequencies, a circular slot is introduced on the radiating element (Ant III). Two inverted F-shaped and rectangular DGS are inserted on the ground plane to improve the operating bandwidth of the antenna (proposed single element antenna). A low-cost substrate FR4-epoxy having a relative constant 4.4, loss tangent of 0.02 and thickness of 0.74 mm is used in this design. The simulated result shows the proposed single antenna has the better performances. The single antenna has a compact size of 7  6.8  0.74 mm3. Furthermore, the two single elements are transformed into 2-port MIMO configuration for mm-wave 5G MIMO applications. To achieve the improved isolation characteristic of the MIMO antenna, a rectangular DGS is introduced in the center of the ground plane. The result indicates that this antenna shows a reflection coefficient under – 10 dB over a range from 26.82 GHz to 38.16 GHz with bandwidth of 11.34 GHz (F.B.W 34.90 %). The gain of the antenna is found more than 5 dB in the whole operating band width. The MIMO antenna is also characterized by good isolation ranging from 19 to 56 dB. Additionally, the MIMO antenna has a compact size of 15.5  6.8  0.74 mm3. Due to these superior results, the proposed MIMO antenna could be a potential candidate for MIMO 5G mm-wave applications.

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