Nijas, C M; Mohanan, P(Cochin University Of Science And Technology, March , 2015)
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Abstract:
The main objective of this thesis is to develop a compact chipless RFID
tag with high data encoding capacity. The design and development of chipless
RFID tag based on multiresonator and multiscatterer methods are presented
first. An RFID tag using using SIR capable of 79bits is proposed. The thesis
also deals with some of the properties of SIR like harmonic separation,
independent control on resonant modes and the capability to change the
electrical length. A chipless RFID reader working in a frequency band of
2.36GHz to 2.54GHz has been designed to show the feasibility of the RFID
system. For a practical system, a new approach based on UWB Impulse Radar
(UWB IR) technology is employed and the decoding methods from noisy
backscattered signal are successfully demonstrated. The thesis also proposes a
simple calibration procedure, which is able to decode the backscattered signal
up to a distance of 80cm with 1mW output power.