Measurement and analysis of wireless power distribution network using magnetic field resonance in 3D package and IC

To overcome power distribution network (PDN) design challenges such as serious power noise, large system area burden, the wireless power transfer (WPT) system in the 3D package and IC is applied. In this study, the 3D multi-helix inductor is proposed for designing the 3D package and IC with a WPT scheme and an equivalent circuit modeling is also implemented. The fabricated package WPT system represents a voltage transfer ratio (VTR) of 77.4 % and a system-level power efficiency of 53.0 %. The wireless PDN impedance is analyzed to verify the performance of the 3D package and IC with a WPT scheme in terms of SSN. It shows excellent performance in terms of SSN because the DC voltage output section of the rectifier of the WPT system can be assumed as voltage regulator module (VRM). Also, it has a characteristic of a band-pass filter (BPF), which passes resonance frequencies only due to the magnetic field resonance characteristic of WPT. Thus, the 3D package and IC with a WPT scheme becomes an excellent PDN solution that can reduce such system area burden and power noise at the same time.