An antenna design that taps into electric fields across air gaps makes low-power, wireless biomedical implants more feasible. Micromechanical resonators are tiny, silicon-based cantilevers that, due to their sensitivity to high-frequency AC fields, are being targeted as the receiving elements in wireless power designs.

Radiation pressure exerted by light on any surface is the pressure generated by the momentum of impinging photons. The associated force – fundamentally, a quantum mechanical aspect of light – is usually too small to be useful, except in large-scale problems in astronomy and astrodynamics.

We report wireless actuation of a Lamb wave micromechanical resonator from a distance of over 1 m with an efficiency of over 15%.

Wireless transfer of power via high frequency microwave radiation using a miniature split ring resonator rectenna is reported. The near-field behavior of the rectenna is investigated with microwave radiation in the frequency range between 20-40 GHz with a maximum power level of 17 dBm.

The first microphone was invented and patented by Emile Berliner in the late nineteenth century. Since then, microphone diaphragm sizes have shrunken to as- tounding sizes and continue to shrink.

Wireless transfer of information is the basis of modern communication. It includes cellular, WiFi, Bluetooth, and GPS systems, all of which use electromagnetic radio waves with frequencies ranging from typically 100 MHz to a few GHz.