Healthier mobile phones

Professor Roger Green of Warwick University, English Midlands, has designed a handset that is said to cut radiation passing through the user's head by 97 per cent while also doubling the life of the phone's battery.

He is in negotiations with four mobile phone companies, including Nokia, that are interested in his discovery.

Professor Green's diffraction antenna directs its radiation backwards, away from the head by a factor of up to 30 times compared with levels from current mobile phones. The proof-of-concept prototype is smaller, focusing its signal outward, which makes it more power-efficient.

The design is based on the strategic combination of three elements. They are a diffraction antenna, an impedance-correcting helical antenna and a contoured electric field structure so that radiation towards the user is redirected away with respect to standard in-head radiation levels.

Professor Green says that the technology transmits 10 to 30 times less than the usual amount of radiation towards the shielded side (that is: towards the head of the user), while the corresponding radiation in a forward direction (away from the shield) is approximately doubled compared with a standard antenna.

For further information please contact Peter Dunn via ph: +44 24 76 523708 or fax: +44 24 76 528194.