Decoupling Analysis of Wideband 6G Mobile Antennas for IoT Applications

Wideband and compact sixth-generation (6G) antenna design is proposed for Internet-of-Things (IoT) applications. The antenna is placed on the metal rim of a smartphone and it covers a wide range of FR3 frequency bands, from 7.1 GHz to 13.2 GHz. Special emphasis is on the analysis and reducing coupling between two nearby located antenna elements. With an adequately designed decoupling element, a slot on the metal rim, coupling is significantly reduced, remaining below −20 dB on a wide frequency range. This allows placing antennas very close to each other, squeezing the size of a multiple antenna design, and enables efficient implementation of high-order multiple-input multiple-output (MIMO) systems.