DEC 00] UNIVERSITY OF WARWICK NEWS
Mobile Phone Health Threat Reduced By Expert
fears over mobile telephones could soon become a thing of the
past thanks to an invention by a professor at the University of
Roger Green's invention will cut the energy passing through a
user's head by 97 per cent. It will also double battery life, or
halve the size of the battery needed.
noticed that antennae for mobiles tend to be based on
well-established simple structures -usually "quarter wave
of their need to be compact, there is no room for more
sophistication using conventional techniques.
their very simplicity, and the fact they broadcast radiation in
every direction including the users head, has led some to be
concerned about possible health hazards.
if the radiation does not cause a health hazard from a technical
point of view, the power being transmitted into a user's head is
wasted, even if a “hands-free” kit is used.
Green, from the Department of Engineering, has designed a new
antenna based on the combination of three elements, "a
diffraction antenna" an "dielectric antenna", and
a "contoured electric field structure" so that
radiation that would move to the user's head is redirected away,
by a factor of up to 30 times, in comparison to radiation levels
from most current mobile phones.
effect of all these design elements is to produce a compact
antenna which reduces radiation passing through a user’s head
by up to 30 times.
can also double the amount of radiation broadcast away from the
head of the user in comparison to that from a standard antenna.
increased strength signal means that for mobile phones, battery
life is extended, or batteries can be smaller for the same
effective range of transmission.
reduced battery size coupled with the reduced antenna size that
results from this technology can produce even smaller mobile
increased efficiency that generates that doubling of signal
power could be used instead to halve the radiation output of the
phone overall generating the same signal strength as current
phones but doubling the reduction of radiation broadcast through
the users head.
would mean 60 times less radiation being broadcast through a
users head reducing even more any possible health hazards.
Green is now seeking interest from mobile telephone companies to
develop commercial models of this technology.