Abstract A novel ultra wideband (UWB) printed monopole multiple-input multiple-output (MIMO) antenna with non-uniform transmission line using nonlinear model predictive control (NMPC) is presented. The proposed antenna is superior to conventional antennas in terms of dimensions, gain, and efficiency while maintaining the impedance bandwidth. In order to improve the results, a non-uniform transmission line has been used for impedance matching between the radiated patch element and the coaxial cable. For designing the non-uniform transmission line, it has been expanded using cosine terms. Regarding the presence of differential equation for the variation in the impedance of the transmission line and its transformation to the state-space equation, NMPC has been employed to design the transmission line and determine the cosine expansion coefficients. Two base antennas, as MIMO, were simulated configuration and fabricated. The surface area of the proposed MIMO antenna is 0.99 λ g 2 , the wavelength has been obtained for the center frequency of the 3.16 GHz to 10.6 GHz range, and its mutual coupling, peak gain, channel capacity loss (CCL), total active reflection coefficient (TARC), mean effective gain (MEG) and diversity gain (DG), envelope correlation (ECC) are acceptable. The simulation and measurement results are in good agreement, and the proposed antenna is suitable for MIMO applications.

中文翻译：

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使用非线性模型预测的具有非均匀传输线的新型 UWB 印刷单极 MIMO 天线

摘要 提出了一种使用非线性模型预测控制(NMPC) 的具有非均匀传输线的新型超宽带(UWB) 印刷单极多输入多输出(MIMO) 天线。所提出的天线在尺寸、增益和效率方面优于传统天线，同时保持了阻抗带宽。为了改善结果，非均匀传输线已被用于辐射贴片元件和同轴电缆之间的阻抗匹配。为了设计非均匀传输线，已使用余弦项对其进行了扩展。关于传输线阻抗变化的微分方程及其向状态空间方程的转换，NMPC 已被用于设计传输线并确定余弦展开系数。两个基本天线，作为 MIMO，被模拟配置和制造。所提出的 MIMO 天线的表面积为 0.99 λ g 2 ，已经获得了 3.16 GHz 至 10.6 GHz 范围的中心频率的波长，及其互耦合、峰值增益、信道容量损失 (CCL)、全有源反射系数 (TARC)、平均有效增益 (MEG) 和分集增益 (DG)、包络相关 (ECC) 都是可以接受的。仿真和测量结果吻合良好，所提出的天线适用于 MIMO 应用。总有源反射系数 (TARC)、平均有效增益 (MEG) 和分集增益 (DG)、包络相关 (ECC) 是可以接受的。仿真和测量结果吻合良好，所提出的天线适用于 MIMO 应用。总有源反射系数 (TARC)、平均有效增益 (MEG) 和分集增益 (DG)、包络相关 (ECC) 是可以接受的。仿真和测量结果吻合良好，所提出的天线适用于 MIMO 应用。