Wideband 5G N77/N79 4 $ \times $ 4 MIMO Antenna Featuring Open and Closed Stubs for Metal-Rimmed Smartphones With Four Slits

Ahn, Ji Whan; Youn, Youngno; Kim, Bumhyun; Lee, Jeonghyo; Choi, Nakchung; Lee, Yoon Jae; Kim, G.Y.; Hong, Wonbin

doi:10.1109/lawp.2023.3297990

Cited by 8 publications

(1 citation statement)

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“…In [11] an eight-element MIMO covering 3.3-4.2 GHz for handheld applications is presented with each antenna made up of a meandered branch self-isolated branch network. In [12] a MIMO system is presented comprising separate antenna pairs integrated within slits of 5G metalcase smartphone incorporating stubs within each of the four slits operating in both N77 (3.3 GHz to 4.2 GHz) and N79 (4.4 GHz to 5.0 GHz) frequency bands. To coupling suppression, a bent stub is incorporated improving isolation up to 11.5 dB and ECC below 0.2.…”

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confidence: 99%

Dual-Polarized Wideband 5G N77 Band Slotted MIMO Antenna System for Next-Generation Smartphones

Kiani,

Munir,

Savci

et al. 2024

IEEE Access

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In this work, a slotted wideband eight-element multiple-input multiple-output (MIMO) antenna system is presented, which covers the N77 (3.2-4.2 GHz) frequency band. The MIMO antennas are printed on a 0.8-mm-thick FR-4 substrate with dimensions of 150 × 75 mm 2 . The antennas are placed along the length and width of the printed circuit board (PCB). The arrangement of antenna elements offers pattern and polarization diversity, enhancing the smartphone's ability to receive signals from various directions. The wideband characteristics in the frequency range of 3.25-4.49 GHz are achieved by utilizing a T-slot and an inverted C-slotted stub together. The radiation and total efficiency are found to be >60% for all the MIMO elements. For enhanced isolation between antenna elements placed along the width of the PCB, a slot is introduced, which ensures an isolation of 14.5 dB. This helps achieve an envelope correlation coefficient (ECC) <0.025, diversity gain (DG) >9.95 dB, and a maximum channel capacity (CC) of 40 bps/Hz. The performance of the MIMO antenna is also assessed in the presence of a human, and comparable results are observed. In addition, the examination of the specific absorption rate (SAR) confirms that it remains well within the safety margins when in proximity to humans.INDEX TERMS wideband, MIMO, slot antenna, diversity.

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confidence: 99%