Small, cheap smart-tag devices that are printed as digital circuits in rolls like newspapers could help kickstart the wireless payment industry. The devices, known as rectennas, combine a rectifier - which converts current from AC to DC - with an antenna, and can harness power directly from radio waves given off by a mobile phone.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/nm8jREBGXJw/future-nfc-chips-could-be-printed-like-newspapers-for-cheaper-gadgets
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