Improving the ${Q}$ -Factor of Printed HF RFID Loop Antennas on Flexible Substrates by Condensing the Microstructures of Conductors

High frequency (HF) radio frequency identification (RFID) loop antennas are popular for HF RFID, energy transfer and near field communication applications. One of the major parameters defining the working range of HF RFID antennas is their Q-factor. Printing techniques are the ideal method for mass fabrication of HF RFID loop antennas. However, due to the relatively low conductivity of the inks av...