Performance Study of Detectability of RFID System With Varying Atmospheric Conditions Now a days Radio Frequency Identification (RFID) system has established itself as reliable solution for number of applications like health monitoring system, toll collection at toll plaza, natural habitat monitoring etc. In RFID system data can be stored in tag, which can be read by the RFID reader. But one major issue with this technology is that its detectability may get affected with varying atmospheric conditions like temperature, humidity, presence of soil (in case defense purpose). So now days the prime focus of researcher is to study the effect of varying atmospheric conditions on propagation of Electromagnetic wave to predict the behavior of RFID system. This paper provides the behavioral pattern of RFID system if it is being used in varying atmospheric conditions. We considered arid atmospheric condition for the study on low frequency RFID system. Effects of two parameters on read range (maximum distance between RFID transmitter and receiver) of RFID system were observed i.e. varying temperature and soil layer thickness between transmitter and receiver.

A UHF SemiPassive RFID System with PhotovoltaicThermoelectric Energy Harvesting for Wireless Sensor Networks A semipassive ultrahigh frequency (UHF) radio frequency identification (RFID) system is presented. The reconfigurable architecture of tag is proposed to be compatible with passive and active operating modes. The read range of RFID system and the lifetime of tag is increases by frequency locked onchip oscillator topology. The transceiver is implemented in 0.18xc2xb5m standard CMOS process. The sensitivity of tag is xe2x88x9218dBm for passive mode and xe2x88x9240dBm for active mode with 1.2xc2xb5W power consumption under the supply voltage of 0.8V. The output power is xe2x88x9210dBm for active transmitting mode and the power consumption is 450xc2xb5W under the supply voltage of 1V.