Airlogic ABM-400 Bedienungsanleitung PDF herunterladen (Seite 53)

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Form factor:

Form factor determines the size and shape of a tag. Generally, larger tags provide better range

performance over tags with smaller form factors. The trade off analysis between the size of the

tag and required range performance must be carried out while selecting tag for particular

application. See Figure 13

Figure13.

RFID system classification based on tag functionality

Environmental Condition:

Environmental conditions and materials near RFID systems can affect RF field parameters like

reflectivity/refractivity, absorptive and dielectric properties (detuning). Hence, tag performance

is dependant upon materials near the tag and environmental conditions like temperature,

humidity, etc. Different frequency ranges experience different degree of effects due to above

materials. For example, the attenuation of reflectivity increases with the frequency. The suitable

frequency range and tags should be chosen in order to minimize these effects.

Table3.

Effect of Materials on RF field

Material Effect on RF field

Cardboard

Absorption (moisture), Detuning

(dielectric)

Conductive liquids Absorption

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Airlogic ABM-400 Bedienungsanleitung Seite 53