A proximity coupled graphene patch based two-port multi-input-multi-output (MIMO) antenna with pattern diversity is implemented for THz applications. The MIMO and diversity performance parameters of the antenna like envelop correlation coefficient (ECC), diversity gain (DG) and mean effective gain (MEG) and total active reflection coefficient are calculated and found within the acceptable limits. The antenna offers the ECC $<0.01$, DG $\approx 10$dB, and MEG $\le -3$ dB. The antenna provides the 10 dB impedance bandwidth of 6.06% (1.76 $-$, 1.87 THz). The isolation between the ports of the proposed MIMO antenna remains more than 25 dB in the operating passband. The aspect ratio of graphene patch and physical parameters of the antenna are selected for obtaining the single mode operation with the resonance of $T{M}_{12}$, mode. The utilization of the graphene material provides the flexibility in tuning the antenna response.

针对THz应用，实现了具有模式分集的基于接近耦合石墨烯贴片的两端口多输入多输出（MIMO）天线。计算天线的MIMO和分集性能参数，如包络相关系数（ECC），分集增益（DG）和平均有效增益（MEG）和总有效反射系数，并在可接受的范围内找到。天线提供ECC$<0。01$DG $\approx 10$dB和MEG $\le -3$ D b。天线提供的10 dB阻抗带宽为6.06％（1.76$-$，1.87 THz）。在工作通带中，建议的MIMO天线端口之间的隔离度保持在25 dB以上。选择石墨烯贴片的长宽比和天线的物理参数，以获得具有谐振频率的单模运行。$Ť{\mathrm{中号}}_{12}$，模式。石墨烯材料的利用为调节天线响应提供了灵活性。