A Novel High-Isolation Dual-Band Monocone Antenna Array for Wi-Fi 6 Application

This letter presents a novel high isolation monocone antenna array for Wi-Fi 6 applications. Conical radiator, top patch, and shorting pins are combined to obtain an ultrawide operating bandwidth, which covers the full Wi-Fi 6 frequency bands. The decoupling structure consists of two parts: 1) higher-frequency decoupling element (HDE); 2) lower-frequency decoupling element (LDE). LDE consists of a pair of C-shaped rings, a metal strip and three shorting pins. HDE is composed of two T-shaped metal strips placed vertically on the ground. For further investigation, the equivalent circuit model of the proposed antennas is adopted to explain the decoupling principles. Design formulas are rigorously derived to facilitate the construction of decoupling structures. For verification, a dual-band monocone multiple-input–multiple-output (MIMO) antenna with edge-to-edge spacing of 0.1388λ
₀
(evaluated at lower frequency) is prototyped and characterized. The measured results reveal that proposed antenna can offer enhanced port isolation (23 dB/40 dB), increased antenna efficiency (>80%) and improved pattern diversity.