This paper introduces a novel information-theoretic approach for studying the effects of mutual coupling (MC), between the transmit and receive antennas, on the overall performance of single-input-single-output (SISO) near-field communications. By incorporating the finite antenna size constraint using Chu's theory and under the assumption of canonical-minimum scattering, we derive the MC between two radiating volumes of fixed sizes. Expressions for the self and mutual impedances are obtained by the use of the reciprocity theorem. Based on a circuit-theoretic two-port model for SISO radio communication systems, we establish the achievable rate for a given pair of transmit and receive antenna sizes, thereby providing an upper bound on the system performance under physical size constraints. Through the lens of these findings, we shed new light on the influence of MC on the information-theoretic limits of near-field communications using compact antennas.
翻译:本文介绍了一种新颖的信息理论方法,用于研究传输和接收天线之间相互连接(MC)对单一投入单产出(SISO)近地通信总体性能的影响。通过采用楚理论和根据恒定最小分布假设将有限天线尺寸限制纳入,我们从两个辐射量之间得出了监控固定尺寸。通过使用对等理论获得了自我和相互阻碍的表达。我们根据SISO无线电通信系统的电路理论双关模式,为特定一对传输和接收天线尺寸设定了可实现的速率,从而在物理大小限制下为系统性能提供了上限。我们从这些结果的角度来看,我们用紧凑天线展示了MC对近地通信信息-理论界限的影响。