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Decoupled multi‐input multi‐output antennas with a common dipole for wideband 5G laptop computers
Author(s) -
Lee ChengTse,
Su SaouWen
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32736
Subject(s) - dipole , wideband , physics , dipole antenna , decoupling (probability) , wavelength , capacitance , electrical engineering , optoelectronics , optics , engineering , antenna (radio) , quantum mechanics , electrode , control engineering
Two decoupled antennas, comprising two feeding monopoles and one dipole shared by the monopoles, for the fifth‐generation (5G) multi‐input multi‐output (MIMO) applications are proposed. The feeding monopoles are placed on both sides of the coupled‐fed, common dipole. First, to operate in the 3.3–5.0 GHz 5G wideband, two resonant modes at about 3.6 and 4.7 GHz, contributed to by the common dipole and the feeding monopoles respectively, are utilized. Then, by introducing distributed capacitance loaded on the dipole center, the one‐wavelength dipole resonant mode can be lowered to oppose the counter‐phased half‐wavelength mode currents on the half dipole, resulting in self decoupling around 3.6 GHz. The mutual coupling for the common dipole is reduced by about 19 dB in this study. The design shows a small size of 35 mm × 5 mm (0.38‐wavelength × 0.05‐wavelength at 3.3 GHz) and can be a promising candidate for narrow‐bezel 5G laptop computers.