IMPROVEMENTS IN OR RELATING TO PORTABLE PHONES

摘要

A portable phone is disclosed having in-built user protection to ensure that transmission field strengths experienced by the user of the phone are relatively low as compared with those present in adjacent volumes of space. For example, a physical shield such as a reflector to shield the user from the incident radiation with a dielectric medium between the antenna and the reflector. Alternatively, the phone's antenna may be configured to produce asymmetric near-field transmission field strengths. One way of achieving this is by means of a near-field phased array such as two parallel half-wave dipoles separated by one quarter of a wavelength and excited in quadrature.