Optimization of the Coupling Coefficient of the Inductive Link for Wireless Power Transfer to Biomedical Implants

Figure 6

Simulated and analytical results of k of a WPT system by sweeping n₁ and b. Symbols are for simulated, while lines with symbols are for analytical, respectively. f_p = 30 MHz, h = 20 mm, R_av = 20 mm, R₂ = 5 mm, r₁ = 0.287 mm, and r₂ = 0.04 mm.