Electrically small RF coil arrays for medical & wireless power applications


This paper analyzes the effect of close proximity for coil arrays and measures the S<sub>21</sub> mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, &amp; 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for… (More)


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