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It is demonstrated how the realized efficiency of a mobile phone antenna, placed beside a head-phantom, can be increased approximately 1 dB by adding a parasitic radiator on the front side of the ground plane. The effect of the parasitic radiator is a cancellation of a part of the near field impinging on the head. This reduces the amount of power dissipated in the head and hence, the realized efficiency is increased.
Antennas and Propagation Society International Symposium, 2003. IEEE (Volume:2 )
Date of Conference: 22-27 June 2003