According to their press release, what Fujitsu Laboratories has done is to develop technology that dramatically shortens the time required to design transmitters and receivers for magnetic resonance charging systems and, in addition, enables accurate tuning of resonant conditions in the design phase, even for compact transmitters and receivers that are prone to influences from nearby metallic and magnetic objects.

The new technology has the following characteristics:

1. A magnetic field analysis simulator which analyzes the coil model and a specialized circuit simulator which analyzes the resonance conditions, including the capacitor model, are combined, making it possible to quickly and accurately design wireless charging systems for multiple transmitters and receivers at once using a variety of coil sizes.

2. The design of the wireless charging system can be automated to precisely match the desired resonance requirements, based on an assessment function which maximizes the charging efficiency.

Together, say Fujitsu, these two technologies represent the world's first practical magnetic resonance design simulator which enables rapid and precise designs for transmitters and receivers according to the desired resonance requirements.

This analysis and design technology was used to design a compact, slim power receiver, and to manufacture prototype mobile phones with built-in wireless charging The prototype mobile phones can charge anywhere within the power-transmitter's range, regardless of their position in reference to the transmitter, with 85% efficiency.