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OBID
i-
scan
®
HF
Installation
ID ISC.M02.M8-B
FEIG ELECTRONIC GmbH
Page 9 of 15
M90402-1e-ID-B
3.2.3 Connection of the external antennas
Up to 8 external antennas can be connected.
For the connection of the external antennas 8 antenna connectors (X1..X8 respectively A1..A8) are
available.
The connector type is U.FL-R-SMT from the company Hirose. .
Alternatively a 16pin connector can be used for the connection of the antennas.
Figure 1 shows the pin assignment.
Figure 1:
Antenna connector‘s
Note:
The maximum antenna cable length should not increase a maximum length of 50cm
(24inch)
The input impedance for the antenna must be calibrated to a value of
50
(3
3°).
A not correct tuned antenna can destroy the reader.
The optimum working quality of the antenna should be in a range of QB = 10...20.
For measuring the working quality the antenna must be connected with a 50
-source,
e.g. a network analyzer or a frequency generator
When connecting an antenna, ensure that it does not exceed the permissible limits pre-
scribed by the national regulations for radio frequency devices.
The ultraminiatur coax connector can be used for up to about 20 connection cycles. For
the d
isconnection the „Extraction Tool“ must be use according to the recommendation
from the manufacturer.