Non-foster matching of an RFID antenna - New Jersey Institute of ...

CHAPTER 5
CONCLUSIONS
The study proposed a new circuitry for Non-Foster matching of antennas which are used
as UHF RFID transponder antennas. The improvements presented in this work over
previous similar works are Negative Impedance Converter circuitry's low power
consumption, low production cost and integration on the proposed antennas' boards
resulting in more compact structure.
Also proposed in this study are four different types of printed dipole antennas that
have Marchand baluns and capacitively coupled-excitation point. This results in a more
suitable structure for chip-excitation which is used in RFID Tags. Additionally, for the
Antenna Model-2, a newly proposed structure is designed which includes resonator
coupling. This structure is expected, according to simulations made, to help increasing
the reading range of the RFID Tag.
After completing numerical design, Printed Circuit Boards of the antennas were
modeled in Cadsoft EAGLE Layout Editor environment in compliance with GERBER
RS-274x format. The PCBs were produced in the facility of Delta Circuits Inc, Fairfield,
NJ and measurements were done at RF/Microwave & Lightwave Engineering Laboratory
of NJIT.
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