a radio frequency identification device includes : a first amplifier configured to amplify a level of a first radio signal applied through a first antenna , and output an amplified signal ; a second amplifier configured to amplify the amplified signal to a predetermined level , and output a power signal ; a demodulator configured to demodulate the amplified signal and generate a command signal ; a transmission switch configured to selectively output the power signal according to a response signal corresponding to the command signal ; and a modulator configured to output a second radio signal , which is generated by modulating the power signal , to a second antenna .