Design of a Multi-mode Integrated MIMO Antenna for Broadband Mobile Communications with Low SAR

This paper presents a novel multi-bandwidth MIMO antenna with low specific absorption (SAR) that addresses the issue of human radiation exposure. The design utilizes a balanced current distribution mode to reduce the impact of the radiation electric field component on the human body, resulting in SAR values below the specified limit. The results demonstrate that the antenna performs well in multiple frequency bands, including WiFi 2.4G, WiFi 5G, sub6GHz (n41/n77/n79), and the related frequency bands of indoor positioning UWB channel, with an efficiency exceeding 50% across the entire band and isolation degree greater than 16dB. This innovative design provides a new approach to developing low SAR antenna devices.