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7-10
Deterioration characteristic of communication range depending on the distance between an antenna and tag back metal is shown below.
••••
Antenna
Influence of metal plate at the back of antenna on the
communication range is 1% or less.
*Metal plate 350 x 350 x 1 (thickness) mm,
aluminum, stainless steel.
••••
Tag
* Metal plate 120 x 120 x 1 (thickness) mm, aluminum,
stainless steel.
Distance between
back metal and tag
Communication
2 m mode
5 m mode
0 mm
-10%
-10%
5 mm
-5%
-5%
10 mm or more
0%
0%
Metal plate
Antenna
Communica-
tion range
Tag
Metal plate
Antenna
Communication range
Tag
Distance between back metal
and tag
7-8 Influence of Back Metal (Reference)