In [1], the authors have recently introduced a circuits-based approach for modeling the mutual coupling of reconfigurable surfaces, which comprise sub-wavelength spaced passive scattering elements coupled with electronic circuits for enabling the reconfiguration of the surface. The approach is based on a finite-length discrete dipole representation of a reconfigurable surface, and on the assumption that the current distribution on each thin wire dipole is a sinusoidal function. Under these assumptions, the voltages at the ports of a multi-antenna receiver can be formulated in terms of the voltage generators at a multi-antenna transmitter through a transfer function matrix that explicitly depends on the mutual coupling and the tuning circuits through the mutual impedances between every pair of thin wire dipoles. In [1], the mutual impedances are formulated in an integral form. In this paper, we show that the mutual impedances can be formulated in a closed-form expression in terms of exponential integral functions.
翻译:[1] 在[1]中,作者最近采用了以电路为基础的方法,模拟可重新配置的表面的相互组合,其中包括次波长空间被动散射元件,加上电子电路,以便能够重新配置表面。该方法基于可重新配置的表面的有限长度离散diole表示,并基于以下假设:每个薄线底线的当前分布是一种正弦功能。根据这些假设,多保险接收器港口的电压可以通过一个转移功能矩阵,在多保险发射机的电压发电机中进行配电,该矩阵明确取决于每对薄线底板之间的相互组合和调控电路。在[1]中,相互阻力以整体形式形成。在本文中,我们表明,相互阻力可以通过以指数性整体功能的封闭式表达方式形成。