A hexagonal shaped fractal Multiple input Multiple Output (MIMO) antenna resonates to six different frequencies is presented. A dumbbell structure with hexagon shaped defected ground structure (DGS) is created in the ground plane. Two antenna elements sharing a common ground plane are positioned orthogonal to each other for better isolation. The antenna is designed, fabricated using FR4 substrate with 1.6 mm thickness and tested experimentally. The antenna provides high peak gain of 8.69 dBi at 8.33 GHz. The multiband MIMO antenna resonates for the frequencies 1.9 GHz, 2.9 GHz, 3.2 GHz, 5.0 GHz, 5.6 GHz and 7.74 GHz. Mutual coupling is better than − 20 dB and the peak gain of the antenna ranges from 3.2 to 8.69 dBi. The designed orthogonal two element MIMO antenna is suitable for GSM, PCS, WLAN and Wi-MAX wireless applications. Simulation work is carried out by ADS tool and fabricated antenna is tested with vector network analyser.

呈现了六边形的分形多输入多输出（MIMO）天线，可谐振到六个不同的频率。在接地平面中创建具有六角形缺陷接地结构（DGS）的哑铃结构。共享公共接地平面的两个天线元件相互正交放置，以实现更好的隔离。该天线是使用FR4基板（厚度为1.6 mm）设计，制造的，并进行了实验测试。天线在8.33 GHz处提供8.69 dBi的高峰值增益。多频带MIMO天线在1.9 GHz，2.9 GHz，3.2 GHz，5.0 GHz，5.6 GHz和7.74 GHz的频率上谐振。互耦优于− 20 dB，天线的峰值增益范围为3.2至8.69 dBi。设计的正交二元MIMO天线适用于GSM，PCS，WLAN和Wi-MAX无线应用。