Non-foster matching of an RFID antenna

In this thesis, novel designs of radio-frequency identification (RFID) tag antennas with better matching characteristics to achieve extended range for passive tags have been investigated in the ultra-high frequency (UHF) band. A variety of cavitybacked/coupled microstrip dipole antennas in 915 MHz range were considered. Additionally, a negative impedance converter designed to cancel out antenna's input capacitance at resonance frequency and to produce the real antenna input impedance was designed, simulated and implemented for an RFID antenna. Numerical simulations have been carried out using ORCAD software package (Cadence), ADS software package (Agilent) and HFSS software package (ANSYS/ANSOFT Inc). Antennas have been designed, fabricated and tested; and a comparison of simulated and measured results were done. Further work is recommended to tune antennas to lower the return loss at operating frequency, in order to achieve an optimized range for use with passive tags.

Name thesis:degree_name

Master of Science in Electrical Engineering - (M.S.)

Discipline thesis:degree_discipline

Electrical and Computer Engineering

Year

2009

Author dc:creator

• Yalcin, Nedime Pelin

Contributors dc:contributor

• Edip Niver
• Gerald Martin Whitman
• Ali N. Akansu

• RFID antenna
• Ultra-high frequency
• Electrical and Electronics

Repository record dc:identifier

https://digitalcommons.njit.edu/theses/315

OAI identifier oai:identifier

oai:digitalcommons.njit.edu:theses-1314