Patent ID: 7054595

Claim:
An RFID interrogator, comprising: an antenna configured to transmit and receive RF signals; an RF transceiver configured to receive backscatter modulated RF signals, and generate transmit RF signals; an amplifier coupled with the antenna the antenna and the RF transceiver configured to amplify the transmit RF signals; a first energy director coupled between the RF transceiver and the amplifier, the first energy director configured to receive the RF transmit signal and direct thorn to the amplifier and to receive backscatter modulated RF signals and direct them to RF transceiver; and a second energy director coupled between the amplifier and the antenna, the second energy director configured to receive the amplified transmit signals from to amplifier and send the amplified transmit signals to the antenna, and to receive a backscatter modulated RF signal from the antenna and direct the receive backscatter modulated RF signal to the first energy director bypassing the amplifier.