Polarization - Pepperl+Fuchs IUH-F117-V1-EU Manual

IUH-F117-V1-*
Installation
If you wish to position multiple read/write heads next to each other or above each
other, the distance should be no less than 20 cm between each unit. A minimum
distance of 50 cm is reasonable.
Figure 5.2
5.3.3

Polarization

The polarization of an electromagnetic wave emitted from an antenna depends on
the electromagnetic field component and the spatial position of the antenna. A
fundamental distinction is drawn between linear and circular polarization. The
polarization of the read/write head must be adapted to the polarization of the
transponder in order for a UHF system to utilize the full sensing range. Refer to the
corresponding data sheet for details on the polarization of the transponder.
Linear polarization: the direction of the vector of an electromagnetic field
■
component that generates an electromagnetic wave with linear polarization
is always constant. Linear polarization is available in a vertical and
horizontal configuration, which is dependent on the spatial position of the
antenna.
Circular polarization: the vector of an electromagnetic field component that
■
generates an electromagnetic wave with circular polarization rotates
around an axis parallel with the beam direction. The rotation of the antenna
around the communication axis has no influence.
The IUH-F117-V1 read/write head is supplied with circular polarization.
Polarization can be changed from circular to linear using the software on the
IDENTControl interface. With linear polarization, the polarization level is aligned
horizontally when the read/write head is mounted in the preferred installation
direction with the cable connection vertical facing downwards.
min. 50 cm
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