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Electromagnetic resonators strongly coupled through their near-fields [ A. Karalis, J. D. Joannopoulos, and M. Soljačić, Ann. Phys. 323, 34 (2008) ; A. Kurs, A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher, and M. Soljačić, Science 317, 83 (2007) ] are able to achieve efficient wireless power transfer from a source to a device separated by distances multiple times larger than the characteristic sizes of the resonators. This midrange approach is therefore suitable for remotely powering several devices from a single source. We explore the effect of adding multiple devices on the tuning and overall efficiency of the power transfer, and demonstrate this scheme experimentally for the case of coupling objects of different sizes: a large source (1 m[superscript 2] in area) powering two smaller devices (each ≃ 0.07 m[superscript 2] in area).National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (Award DMR-0819762)Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contract W911NF-07-D-0004)United States. Defense Advanced Research Projects Agency (Contract W911NF-07-D-0004)3M Compan

Simultaneous mid-range power transfer to multiple devices