Optical antenna brings benefits to wireless networks, household electronics and data transfer

November 10, 2002

A new optical antenna, developed by researchers at the University of Warwick, will bring significant benefits to credit card payments, wireless networks, household electronics and longer distance data transfer.

The device was developed by Professor Roger Green and Roberto Ramirez-Iniguez, in the University of Warwick's Engineering Department. It applies techniques used to manipulate radio frequencies to select the incoming "signal frequencies" carried on infrared beams to produce the optical equivalent of the radio.

The new optical antenna has now been licensed to Optical Antenna Solutions of Nottingham which will be responsible for further development and marketing world-wide. Derick Wilson, Managing Director of Optical Antenna Solutions, believes the technology provides enormous benefits to several industries, and has significant commercial opportunities. One of the first applications being considered is to use the antenna to provide secure practical "point and pay methods" for credit cards. The company will unveil the new technology for the first time at the Comdex exhibition in Las Vegas on 18th November.

The optical antenna serves the same purpose as an electronic one. It must collect energy from an area and channel it through to a receiving element or, conversely, transmit energy which has originated from a small source over an area.

This new device uses a combination of precise curvatures on the lens part of the instrument with a multi-layered filter. The optical antenna is so precise that it can detect a signal on one particular wavelength of light and it is 100 times more efficient at gathering in a signal than any previous optical sensor of this kind. This has immediate benefits for indoor wireless networks and household devices. It allows signal transmitters and receivers to operate at a significant angle to each other and to discriminate much more finely between signals. For external data transfer applications it can be used to greater distances - up to 3 miles.

Wireless networks are an economical and flexible alternative to wired systems. Lately, two major transmission technologies have been used to achieve indoor wireless communication: RF (radio) and infrared. For many reasons infrared is often preferred - infrared links provide high bandwidth at low cost, infrared is immune to radio interference, the spectrum is freely available, and infrared components are inexpensive, small and consume little power. This new optical antenna will help turn even more people towards infrared as an alternative to the high cost of maintaining wired networks.
Note for editors there is a 300 dpi pic of Prof Green with a large scale model of the lens of the antenna at http://www.warwick.ac.uk/services/publicity/Pict/greenoa.jpg

For further details please contact:

Professor Roger Green, University of Warwick,
Tel: 44-247-652-3133 Roger.Green@warwick.ac.uk
mobile 44-785-590-1515 (NB Roger is in London on thurs 7th nov on this number on that day he will be availble on his mobile/cell phone number from 12.30 UK time).

Peter Dunn, Press Officer, University of Warwick Tel: 44-247-652-3708 p.j.dunn@warwick.ac.uk

Brian Dolby, GBCS PR Tel: 44-115-950-8399, brian@gbcspr.com

University of Warwick

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