Wireless power transfer technologies enable power transfer to loads through air. The contactless power transformer is a key element of it. In this work, a new transformer with metamaterial is proposed, through which the power transfer distance increases. The electromagnetic…

An aggregate signature scheme can aggregate n signatures on n distinct messages from n distinct signers into a single signature．Thus，n verification equations can be reduced to one．So the aggregate signature adapts to Mobile Ad hoc Network (MANET). In this paper,…

 A substantial problem for the radiation of a plasma column antenna is investigated. By means of the study on electromagnetic (EM) waves propagating along the plasma column and acting with plasma, it is found that a plasma column can radiate…