Applications of negative permeability metamaterials for electromagnetic resonance type wireless power transfer systems

With the development of electric drive systems such as unmanned aerial vehicles and vehicles, charging problem power supply devices has become increasingly prominent. However, traditional method requires physical circuits, which makes it impossible to achieve freedom position in actual use. The wireless transmission technology, mainly relies on electromagnetic wave complete energy transmission, is expected get rid restriction space location solve location, great potential medical treatment, rescue, detection other fields. low efficiency short distance caused by field leakage are two main problems faced radio systems. In general, with increase distance, will drop sharply. Fortunately, inserting a negative permeability metamaterial extraordinary characteristics into transmitting receiving coils greatly alleviate this attenuation trend can also shield radiation certain extent. paper, some experiments metamaterials used resonance type transfer summarized for reference.