A dual band RFID applications in 800 900
MHz and 2400 MHz band is presented. The
Asymmetric Coplanar Strip (ACS) fed antenna
consists of inverted L shaped monopole with a
capacitive loading to provide necessary impedance
matching and current distribution. The antenna has
wide bandwidth from 790 MHz tol050 MHz and
from 2350 MHz to 2640 MHz coving the RFID UHF
and Microwave frequencies. The uniplanar antenna
having overall dimensions of 48 mm x 14 mm is
printed on one side of a substrate of dielectric
constant 4.4 and height 1.6 mm.
Description:
Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on
Dinesh, R; Dr Mohanan, P(Cochin University of Science and Technology, April , 2015)
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Abstract:
The main objective of this thesis is to design and develop spectral signature
based chipless RFID tags Multiresonators are essential component of
spectral signature based chipless tags. To enhance the data coding capacity in
spectral signature based tags require large number of resonances in a limited
bandwidth. The frequency of the resonators have to be close to each other.
To achieve this condition, the quality factor of each resonance needs to be
high. The thesis discusses about various types of multiresonators, their practical
implementation and how they can be used in design. Encoding of data
into spectral domain is another challenge in chipless tag design. Here, the
technique used is the presence or absence encoding technique. The presence
of a resonance is used to encode Logic 1 and absence of a speci c resonance is
used to encode Logic 0. Di erent types of multiresonators such as open stub
multiresonators, coupled bunch hairpin resonators and shorted slot ground
ring resonator are proposed in this thesis.