Wireless power transfer based on dielectric resonators with colossal permittivity

Magneticresonant wireless power transfer system based ondielectric diskresonators made of colossalpermittivity (ε = 1000) and low loss (tan δ = 2.5 × 10–4)microwaveceramic is experimentally investigated. The system operates at the magnetic dipole mode excited in theresonators providing maximal power transfer efficiency of 90% at the frequency 232  MHz. By applying an impedance matching technique, the efficiency of 50% is achieved within the separation between theresonatorsd = 16 cm (3.8 radii of theresonator). The separation, misalignment and rotation dependencies of wireless power transfer efficiency are experimentally studied.

Source: Applied Physics Letters - December 1, 2016 Category: Physics Authors: Mingzhao Song, Pavel Belov and Polina Kapitanova Source Type: research