Effects of power consumption and modulation of the passive RFID tag on the transmission range of backscattered signal

This paper presents effects that power consumption and a modulation technique used for data transmission have on the backscattered signal quality and output characteristics of tags rectifier circuit. Both higher power consumption and a higher duty cycle ratio (DCR) of the modulation used, degrade the performance of the passive backscatter based RFID tag. Measurements are conducted on the reader - tag system set to work on 13.56 MHz, with modulation frequencies of 10 kHz and 100 kHz, which corresponds to minimal bit rates of 10-kbps and 100-kbps, respectively.