Analysis of Coil Coupling in the Near-Field/ Far-Field Hybrid Region

In this letter, we quantitatively analyze the mechanism of two coils working in the near-field/far-field hybrid zone. In particular, we propose to separate the coupling in terms of static and radiative, rather than the ambiguous near or far field. The results of our impedance matrix model show that the domination of the two mechanisms depends on both the antenna geometry and the antenna arrangement. We demonstrate how one may take advantage of the hybrid coupling mechanism to acquire maximized gain and to broaden the channel bandwidth.

Automated summary

In this letter, we analyze the mechanism of two coils in the near-field/far-field hybrid zone quantitatively. We propose to separate the coupling into static and radiative instead of the ambiguous near or far field. The results of our impedance matrix model demonstrate that the dominance of these mechanisms depends on antenna geometry and arrangement. We illustrate how to utilize the hybrid coupling mechanism to achieve maximized gain and broaden channel bandwidth.