Design And Optimisation Of Resonance-Based Wireless Power Transmission

Resonance-based wireless power transmission by stronglhy magnetic coupled resonances,which transfers energy by non-contact form,completes high efficient transmission with directivity.More and more people focus on the wireless power transmission for its wide application in future.Resonance-based wireless power transmission is different from the way transferring energy by electromagnetic induction and can transfer energy over distance in excess of one meter.Transferring energy by microwave or laser can supply energy to very far target device,but it requests no barrier on the transmission way and there will be more radiant power loss than resonance-based wireless power transmission.Resonance-based wireless power transmission can go through non-magnetic barrier without power loss.In this paper, the structure diagram is supplied and analyzed.We also analyze the resonance-based wireless power transmission by coupled mode theory,build the model for helical antenna with Matlab. The circuit for resonance-based wireless power transmission is designed in the end.Basing on the data of the circuit test, the efficiency of RF module can get to 88.77%,the efficiency of RF module is 50% after impedance matching, the efficiency between two helical antennas is 77%,then the wireless power transmission can reach to 38.5% in its efficiency.