Influence Of Metal Behind Tag (Reference) - Omron V680-CA1D User Manual

Section 6
Appendices

Influence of Metal Behind Tag (Reference)

Take the influence of metal behind Tags into consideration when mounting them.
The communications distance is adversely affected if there is any metal material around the Tag. The
degree of influence depends on the type, size, and shape of the material around the Tag. The following
graphs show the influence of metal objects behind the Tag for reference.
• Influence of Metal
The following diagram shows the rate of reduction in the communications distance when metal is
located behind the Tag. The horizontal axis in the diagram indicates the distance between the Tag and
the metal plate, and the vertical axis indicates the relative communications distance at 100% without a
metal plate, i.e, the rate of reduction in communications distance.
Test Setup
Antenna
Material: Steel (t = 1.5 mm)
Shape: 295 mm × 295 mm
Heat-resistive RFID System
102
User's Manual
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0 10 20 30 40 50 60
Distance between Tag and metal behind Tag (mm)
Tag
Distance
Communications
between metal
distance
behind Tag
and Tag
70 80 90 100 110 120 130 140 150 160 170 180 190 200
Metal