Wideband Terminal Antenna System Based on Babinet’s Principle for Sub-6 GHz and Wi-Fi 6E/7 Applications

In this paper, a novel input impedance analysis methodology based on Babinet’s principle to broaden bandwidth is proposed, and a broadband multiple-input and multiple-output (MIMO) antenna system is designed, fabricated, and measured for fifth-generation (5G) and Wireless Fidelity (Wi-Fi) 6E/7 mobil...

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Bibliographic Details
Published in:Micromachines (Basel) Vol. 15; no. 6; p. 705
Main Authors: Han, Chong-Zhi, Gong, Guji, Wang, Yan, Guo, Jie, Zhang, Liang
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 26.05.2024
MDPI
Subjects:
Acceptable noise levels
Antenna design
Antennas
Antennas (Electronics)
Applications programs
Bandwidths
Broadband
broadband antenna
Broadband transmission
Communication
Correlation coefficients
Equivalent circuits
Image enhancement
impedance property analysis methodology
Input impedance
Methodology
MIMO antenna system
MIMO communication
MIMO communications
Mobile applications
Mobile computing
Monopole antennas
Slot antennas
Wi-Fi
Wireless telephone software
broadband antenna
impedance property analysis methodology
MIMO antenna system
ISSN:2072-666X, 2072-666X
Online Access:Get full text
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Summary:In this paper, a novel input impedance analysis methodology based on Babinet’s principle to broaden bandwidth is proposed, and a broadband multiple-input and multiple-output (MIMO) antenna system is designed, fabricated, and measured for fifth-generation (5G) and Wireless Fidelity (Wi-Fi) 6E/7 mobile applications. By analyzing the input impedance of open-slot antennas and planar monopole antennas using numerical calculations, the characteristics of the input impedance can be obtained. We find that combining the two antenna types in parallel can significantly enhance the bandwidth. Then, the four-dimensional image calculated by MATLAB based on the parallel impedance formula is processed to validate the methodology. Thus, a broad antenna element based on the impedance property analysis methodology is achieved, which operates ranging from 2.6 GHz to 7.46 GHz. Moreover, the equivalent circuit of the antenna element is established to further verify the validity of the methodology. Finally, a broadband MIMO antenna system consisting of eight antenna elements is designed, fabricated, and measured, and the isolation performance is better than 12 dB. Acceptable total efficiency higher than 45% is also obtained with envelope correlation coefficients (ECCs) lower than 0.05. The proposed impedance property analysis methodology innovatively proposes a new way to increase bandwidth, which can be widely applied in various antenna designs. Also, reasonable results show that the proposed MIMO antenna system is a good candidate for 5G and Wi-Fi 6E/7 mobile applications.
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ISSN:2072-666X
2072-666X
DOI:10.3390/mi15060705