IFM Electronic ANT805, Руководство по эксплуатации

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UK
RFID UHF antennas
5
3 Product description
The ifm RFID antennas consist of several UHF antennas which can meet the
requirements of almost any RFID application� The antennas are divided into three
product lines with regard to their reading range: low-range, mid-range and wide-
range antennas�
3.1 Low-range antennas
With dimensions of 90 x 63 mm the ANT810 / ANT910 low-range antennas have a
high field concentration in the near field and an extremely reduced antenna gain in
the far field� These features ensure that the antennas achieve ranges up to 10 cm
with a typical selectivity of 5 cm�
In addition to the low-range antennas there is the ANT805 ultra-low-range
antenna� The ultra-low-range antenna was designed to read dipole-shaped
tags ("far-field tags") at a very limited distance� This antenna can also activate
loop-shaped tags ("near-field tags") up to 3 cm� The low-range antennas were
developed for larger ranges so that they are in particular suitable for near-field
tags� The antenna allocation according to the reading range and tag shape is
outlined in chapter 3�4�
Figure: ANT805 ultra-low-range antenna,
ANT810 / ANT910 low-range antennas
3.2 Mid-range antennas
The ANT815 / ANT820 / ANT920 mid-range antennas were designed for
applications in the range between near and far field� Special importance was
placed on a compact design to ensure integration into space-limited environments�
With dimensions of 156 x 126 reading ranges of more than 2 m are nevertheless
possible� Mid-range antennas also have an increased selectivity at lower read
distances as compared to conventional antennas� That means the mid-range
antennas are suitable for use in the transition range with different tags�