Methods for extending the bandwidth of field compensation

A compensation method aiming to form a weak field area (a dark spot) in an antenna near region over a broad frequency band is considered. The need for broadband field compensation arises in cases when it is necessary to protect the human body against irradiation, for example, if a mobile transmitter is located in a vehicle in the vicinity of several users. It is shown that broadband field compensation can be achieved in structures, in which the needed antiphase fields are created by antennas of identical type, by radiators located at equal distance from the compensation point, or by flat reflectors.