The Archer module consists of the UltraGig 6400 single chip transmitter with its intelligent beam-forming 60GHz RF transceiver, embedded antenna array, and WirelessHD 1.1 compliant network processor as well as all necessary external components on a single, flex- print cable module.

ENGADGET: Silicon Image UltraGig 6400 WirelessHD, hands-on (video)

The machine that Dr O'Brien and Dr Frazier have designed to get round these constraints consists of a transmitter that sends out a pulse of sound at a frequency of 6 kilohertz, and an array of 52 receivers that collect the reflections from anything buried beneath the surface.

ECONOMIST: Archaeology