15 of 112
To be able to use the complete range of the reader performance in customer applications, we recommend
using the r
eaders ARU 3500 or RRU 4500. It is not possible to run any customer applications on the basic
ARU 3400 and RRU 4400 r
eaders.
7.2
Kathrein RFID Antenna Interface ©KRAI
With the ©KRAI product series, Kathrein has introduced a revolutionary system. By using Kathrein ©KRAI antennas, it is
possible to incr
ease the flexibility due to having sever
al antenna properties at one installation point (in case of PLS and
CSB antennas) and functionality (when cascading SMSH antennas).
©KRAI consists of a digital control bus which enables connection between the RFID reader and the RFID antennas to
allow control and regulation tasks in remote antennas
7.2.1
WIRA 70 ©KRAI Polarisation Switch Antenna (PLS)
Fig. 2: PLS antennas connected to the reader
With the ©KRAI PLS antenna, built as a WiRa 70° antenna, the polarisation can be switched statically or dynamically. The
following settings are possible in any combination:
●
circular LHCP
●
circular RHCP
●
linear horizontal
●
linear vertical.
It is possible to select the best polarisation for wide-r
ange application and to carry out a flexible adjustment of the
antenna on site.
Furthermore, it is possible to increase the read rate via the switching circular LHCP/RHCP by up to 33%.
