Patent ID: 8068010
Filing Date: 2011-11-29
Classification: G06K,H04B

Abstract:
1. A radio frequency identification (RFID) tag, comprising: an antenna; a first structure holding first data; a second structure holding second data; a first pair of strip lines electrically connecting the first structure to the antenna; and a second pair of strip lines electrically connecting the second structure to the antenna, wherein the second data is complementary to the first data, wherein the RFID tag does not comprise a microchip, wherein the RFID tag is not enabled, wherein the antenna is configured to receive an interrogation signal from an interrogator and to transmit the received interrogation signal simultaneously to the first and second structures via the first and second pair of strip lines, respectively, wherein the interrogation signal is an electromagnetic radio frequency signal, wherein the first structure is configured to modulate the interrogation signal received from the antenna with the first data to generate a first modulated signal and to transmit the first modulated signal to the antenna via the first pair of strip lines, wherein the second structure is configured to modulate the interrogation signal received from the antenna with the second data to generate a second modulated signal and to transmit the second modulated signal to the antenna via the second pair of strip lines, wherein the antenna is configured to combine the first and second modulated signals to generate a response signal comprising third data that is a combination of the first data and the second data and to transmit the response signal to the interrogator, wherein the second pair of strip lines are configured to be burst open by a stimulus to disconnect the second structure from the antenna to enable the RFID tag, and wherein if the antenna in the RFID tag after being enabled were to receive the interrogation signal from the interrogator, then the third data in the response signal generated from the received interrogation signal would comprise the first data and would not comprise the combination of the first data and the second data.