LOOP ANTENNA INCLUDING A FIRST LOOP COUPLED TO REFERENCE LOOP ANTENNAS IN A MOBILE COMMUNICATION APPARATUS

摘要

A loop antenna formed of an radiation loop and a reference loop. The reference loop is generally the same size, shape and electrical lenght as the radiation loop and is located in the near field of the in close proximity to the radiation loop. In communication devices having conductive surfaces, components, shielding and other conductive elements in close proximity to the radiation loop, the coupling to the radiation loop that tends to de-tune or otherwise interfere with the operation of the radiation loop is reduced to the reference loop.