RFID-UHF-Antennas
4
3 Product description
The ifm electronic antenna range includes a variety of UHF reader antennas,
which can fulfil the requirements of almost all RFID applications� The antennas are
divided into three product lines according to read range: low range, mid range and
wide range antennas�
3.1 Low range antennas
With dimensions of 90 x 63 mm, the low range antennas have a high field concen-
tration in the near-field, with significantly reduced antenna gain in the far-field� With
these properties, the antennas achieve writing/reading results at ranges of up to
10 cm with a typical selectivity of 5 cm�
Low range antennas are available in Low Range (ANT810/ANT910) and Ultra Low
Range (ANT805)� The ultra low range antenna was designed to read dipole tags
(far-field tags) at an extremely limited distance� These antennas can also activate
loop tags (“near-field tags”) up to 3 cm� The Low range antenna was developed for
larger ranges and is particularly suited to near-field tags� The antenna allocation
according to read range and transponder shape is outlined in Chapter 3�4�
Figure: ANT810 / ANT910 Low Range Antenna
Figure: ANT805 Ultra Low Range Antenna
3.2 Mid range antennas
The mid range antenna ANT820 was developed for applications in the area
between near-field and far-field� Particular importance was placed on creating a
compact construction to enable integration into environments with limited space�
Read ranges of over 2 m are still possible even with dimensions of 156 x 126 mm�
The mid range antenna also offers increased selectivity at lower reading distances
compared with conventional antennas� This antenna design is therefore also suit-
able for use in the so-called transition area with a variety of transponder types�