A wide band, dual radiator Multiple input multiple output (MIMO) antenna resonating at 2.4 GHz Industrial Scientific and Medical (ISM) band is designed and analysed for the body-centric wireless communication. Defected ground structure (DGS) is used to reduce the antenna size and to achieve wide bandwidth. Moreover, a decoupling slot is also etched in the ground plane to improve the port isolation. Proposed 2 × 1 array MIMO structure has occupied the volume of 90 × 40 × 0.8 mm³. Rectangular and cylindrical shaped multi-layered tissue models are used for simulation and pork tissue is used for the measurement of antenna performance. Broad 10-dB bandwidth of 1250/900 MHz, port isolation of 21/20 dB, gain of 5.53/5.07 dBi with, SAR value of 0.628/0.627 W/kg is achieved for the flat/deformed state of antenna. Results show that the proposed DGS-based antenna is reliable to operate on different tissue environment for body area network.

设计并分析了以2.4 GHz工业科学和医学（ISM）频段谐振的宽带双辐射器多输入多输出（MIMO）天线，用于以人体为中心的无线通信。挠性接地结构（DGS）用于减小天线尺寸并实现宽带宽。此外，在接地平面上还蚀刻有一个去耦槽，以改善端口隔离度。拟议的2×1阵列MIMO结构已占据90×40×0.8 mm的体积³。矩形和圆柱形多层组织模型用于仿真，猪肉组织用于测量天线性能。对于天线的扁平/变形状态，可实现1250/900 MHz的10dB宽带宽，21/20 dB的端口隔离，5.53 / 5.07 dBi的增益，SAR值为0.628 / 0.627 W / kg。结果表明，所提出的基于DGS的天线在人体区域网络的不同组织环境下运行都是可靠的。