Impact of Antenna Type and Scaling on Scavenged Voltage in Passive RFID Tags

In this paper, three different types of frequently used antennas in passive RFID tags with different sizes are investigated for voltage scavenging application. Most critical is to create a minimum voltage at the antenna port. Therefore, using simulations with two software packages, CST and HFSS, a detailed explanation is presented of the induced voltage at the antenna port versus antenna length and area for different antenna gains and angles, while located far from the energy source.