UK
RFID-UHF-Antennas
5
Figure: ANT820 Mid Range Antenna
3.3 Wide range antennas
For traditional wide-range applications with read ranges of over 10 m, ifm elec-
tronic offers a wide range antenna model characterised by a half width of 70°
(ANT830)� The circular polarization usually required for UHF applications has been
significantly improved compared with other antennas available on the market� For
the so-called axis ratio, which is used as a characteristic value for circular polariza-
tion, the new model achieves typical values of 1 dB� If specified at all, the usual
value on the market lies at around 3 dB�
The improved circularity
leads to a significant reduc-
tion in the dependence of
the reading results on the
position or alignment of the
transponder� Great impor-
tance was also placed on
the front-to-back ratio of the
antennas to reduce the influ-
ence of the close (assembly)
environment on the antenna
properties�All antennas have
an extremely high protec-
tion class which guarantees
problemfree use in any
environment�
Figure: ANT830 Wide Range Antenna
