ANTI-ELECTROMAGNETIC FIELD ANTENNA FOR CELLULAR TELEPHONE

摘要

An anti-electromagnetic field antenna for cellular telephones (12). The antenna comprises a folded monopole driver antenna (14) adapted to be attached to a coaxial cable and means for shielding the user's head from radio-frequency electromagnetic fields. The shielding means consists of a ground-plane circuit (16) including at least two radials electrically connected to the shielding of the transceiver coaxial cable and means for providing inductance and capacitance to the ground-plane circuit. The ground-plane circuit is contained on an electrical circuit board and the radials are of a metallic foil composition and are printed on the circuit board. This specially designed ground-plane acts as a shield by absorbing and reflecting radio-frequency electromagnetic fields away from the user's head and eliminating stray currents and radiation from the transceiver and coaxial cable.