In the event the tag design is unsatisfactory, the whole
design process needs to be iterated to obtain an antenna of adequate performance.
The following sections illustrate, in detail, the design of two tag antennas suitable for
tagging cases in a supply chain application, such as those required in fast-moving consumer
goods (FMCG) applications, depicted in Figure 4.16.
4.5 Illustrating a Novel Antenna Design
The antenna design methodology is best illustrated with an example. Considering the
design of an RFID label for labeling cases constructed from corrugated cardboard boxes at
a distribution center, a number of antenna requirements can be found.
FIGURE 4.16
An illustration depicting the use of RFID
labels in a supply chain application for
tracking cases. Here the RFID portal is
constructed by using an array of reader
antennas at various orientations to ensure
maximum coupling to tags placed at, possibly,
different orientations.
RFID portal
(a suitable reader antenna
configuration to allow maximum
coverage of RFID tags)
Cases are labeled with RFID tags
Packed cases placed
on a conveyor belt
80 RFID Handbook: Applications, Technology, Security, and Privacy
4.5.1 Antenna Requirements, Material, and RFID IC Impedance
Assuming the tags have to operate under the electromagnetic compatibility constraints
enforced by the FCC (2005), the following requirements can be outlined:
.
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