Prototype of mini 4WD supplied by wireless power

Not only the wireless power transfer technology replaces the conventional cable electricity charging, but also is it strongly expected to feed the movement body which maybe a mobile phone or a driven car. In this report, a system of driving mini 4WD known as a small car model will be challenged to be fed by wireless power. Usually, mini 4WD is supplied by using 2 size AA batteries. But we put a receiving antenna and a rectifying circuit into mini 4WD in substitution for the batteries and let mini 4WD driven by the power from the transmitting antenna on the running way. In this prototype, the high efficiency of the rectifying circuit have been realized by using an impedance matching circuit and the receiving antenna has been minimized successfully by using electromagnetic simulation soft.