Part of the Electronics glossary:

Powercast is a technology that uses a low-level radio frequency (RF) electromagnetic field to recharge small electrochemical cells and batteries. Powercast can be used with low-power electronic devices such as cellular telephone s, portable media players or hearing aids. The technology is under development by Powercast LLC, based in Pennsylvania.

A Powercast transmitter, also called a Wireless Power Platform, sends out a continuous RF signal when plugged into a conventional utility outlet. The AC power contained in the EM field is converted to DC inside the device to be charged by means of a small rectifier chip called the receiver. The process is similar to the way an old-fashioned "crystal set" radio receiver intercepts EM energy with a wire antenna and produces audible signals in a headset without any other source of power. The charging effect occurs slowly but most small devices containing rechargeable batteries are ready for use after being left near the transmitter overnight.

This was last updated in March 2007
Posted by: Margaret Rouse

Related Terms

Definitions

  • frequency jammer

    - Frequency jamming is the disruption of radio signals through use of an over-powered signal in the same frequency range. When most people think of frequency jamming, what comes to mind are radio, r... (WhatIs.com)

  • anode

    - An anode is the electrode in a polarized electrical device through which current flows in from an outside circuit. Conversely, a cathode is the eletrode in a polarized electrical device through whi... (WhatIs.com)

  • cathode

    - A cathode is the metallic electrode through which current flows out in a polarized electrical device. Conversely, an anode is the electrode in a polarized electrical device through which current fl... (WhatIs.com)

Glossaries

  • Electronics

    - Terms related to electronics, including definitions about electrical components and words and phrases about computers, laptops parts, digital cameras, televisions and home appliances.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question About PowercastPowered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.