Installation Manual

OBID i-scan
®
Installation ID ISC.ANT310/310-A
FEIG ELECTRONIC GmbH Page 10 of 22 M90401-1e-ID-B.doc
4.3 The influence of the transmitting power on the reading range
The antenna’s working range is dependent on the antenna itself, the reader, the transponder and
the adjusted transmitting power of the reader. Due to the fact that the transponder gets its energy
from the magnetic field produced by the antenna and that the field intensity decreases at higher
distances, the radiated transmitting power has strong influence on the range.
Figure 5: Reading range of the antenna ID ISC.ANT310/310 in dependence on the RF power
Read range of two typical transponder, size 46 x 75 mm
2
, over the centre of the antenna, parallel
orientation to the antenna.
A transmitting power of more than 8 W could, in dependence on the ambient temperature, heat up
the antenna and may even destroy it.