2S.C.Tang,S.Y.Hui,and H.S.-H.Chung,"Characterization of coreless printed circuit board(PCB)transformers,"IEEE Trans.Power Elec tron.,vol.15,no.6,pp.746-752,2000.
3W.C.Ho and M.H.Pong,"Analysis and design of printed windings of power transformers using partial inductance method,"Proc.IECON'95-21st Annu.Conf.IEEE Ind.Electron.,vol.1,pp.376-380,1995.
4Modified inductance calculation with current redistributionin spiral inductors.Microwaves,Antennasand Propagation,IEEE Proceed ings,2003,150(06):445-450.
5H.M.Greenhouse.Design of Planar Rectangula-r Microelectronic Inductors.IEEE Trans.on Parts,Hybirds,And Packaging,P HP-1974,10(02):101-109.
6a K.Ramrakhyani,S.Mirabbasi,Mu Chiao,and C.M,"Design and optimization of res-onance-based efficient wireless power delive-ry systems for biomedical implants.,"IEEE Trans.Biomed.Circuits Syst.,vol.5,no.1,pp.48-63,2011.
7Kim K Y,Kim K Y,Kim C W.Automated frequency tracking system for efficient mid-ran-ge magnetic resonance wireless power transf-er[J].MICROWAVE AND OPTICAL TECHNOLOGY LETTERS,2012,54(06):1423-1426.
8M Ali,G R Dougal.A miniature packaged rectenna for wireless power transmission and date telemetry[C].IEEE International Worksh-op on Antenna Technology Small Ant-ennasand Novel Metamaterials,Mar,2006:225-228.
