요약

The emphasis of the seminar and this presentation will be on the aspects of mobile communications that might impact human health, in this case the transmission characteristics. Though the transmit power from a mobile can be small compared to that of a base station, the distance to the body to a mobile phone is only 10’s of millimeters, whereas, it is rarely possible to get closer than 10’s of meters to a base station. As a result the highest exposures to radio frequency energy comes about from the use of a mobile phone close to the body rather than the larger power more distance base station. For this reason this talk will further restrict its scope to consideration of the characteristics of the mobile phone only. The talk will briefly cover the types of devices and how their modes of usage might impact the amount of absorbed power (SAR). The focus will then move to current mobile phones and their characteristics and how the evolution of mobile phones form 2nd generation through 3rd and forward towards 4th generation will impact the transmitted signals and the characteristics pertinent to research into human health effects. The talk will be rounded off with a discussion of technologies that are not specific to any one mobile telephone standard but are likely to be significant.