A method of operating a radio frequency identification (RFID) tag assembly having a a predetermined operating frequency with a body composed of an absorbing material coupled to a first side of the an RFID semiconductor chip, absorbing a substantial amount of a received energy in the absorbing material body, receiving at a second side of an antenna coupled to the RFID semiconductor chip mounted a first portion of the radio energy as transmitted from a remote base station transceiver, the receiving being at the first side being oriented away from the operating surface, receiving at a second side of the two-sided planar antenna a second portion of the radio frequency energy transmitted from the base station transceiver following the absorbing, the second side being oriented towards the operating surface and towards the absorbing material body, and processing the received first and second portions of the radio frequency energy.