Wireless Powering for Miniature Implantable Systems

  • John S. Ho
  • Alexander J. Yeh
  • Sanghoek Kim
  • Ada S. Y. Poon


The miniaturization of electronics has paved way for implantable devices at the scale of a millimeter or less. Progress in energy storage technologies, however, has been slower and the miniaturization of the power source remains unsolved. Wireless powering provides a potential solution in which electromagnetic energy is transferred from an external source. In this chapter, we analyze powering in the weakly coupled regime and discuss a specific example for a cardiac implant. For a weakly coupled device, we show that optimal powering occurs in the mid-field where power transfer occurs though a combination of inductive and radiative modes in tissue, in contrast to conventional inductive coupling.


Complementary Metal Oxide Semiconductor Power Transfer Receiver Coil Specific Absorption Rate Wireless Power 
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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • John S. Ho
    • 1
  • Alexander J. Yeh
    • 1
  • Sanghoek Kim
    • 1
  • Ada S. Y. Poon
    • 1
  1. 1.Stanford UniversityStanfordUSA

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