Antenna Connection - Feig Electronic OBID ID ISC.MR200-EP Montageanleitung

®
OBID i-scan

3.7 Antenna connection

An SMA socket is provided on the circuit board for connecting the external antenna.
The maximum tightening torque of the SMA sockets is 0.45 Nm (4lbf in).
Caution:
Greater tightening torque will destroy the connector.
Terminal
X2
Table 3-3: Connecting the external antenna
Notes:
•
Maximum range is achieved when the input impedance of the antenna is calibrated to a
Ω ∠
value of 50 0°.
•
The optimal operating Q of the antenna should be in a range of Q
determine the operating Q, the antenna must be supplied with a 50
network analyzer or a frequency generator.
•
When connecting the antenna be sure that the permissible limits specified by national
code with respect to RF installations are not exceeded.
•
To achieve optimum read distances, the length of the antenna lines should be
(3.6 m ± 0.1 m) + n * 7,20m.
•
To meet national code with respect to RF installations, the antenna feed line must be
equipped with the supplied
must be wrapped tightly around the EMC ferrite ring core at least 4 times. The distance
between the Reader connection and the ring core should be no greater than 20 cm (see
Fig. 3-7).
FEIG ELECTRONIC GmbH
Montage / Installation
Description
External antenna connection
(input impedance 50Ω)
∅
28 mm x 20 mm EMC ferrite ring core. The antenna line
Fig. 3-7: Antenna cable with EMC ferrite ring core
Page 38 of 53
= 10...40. To
O
Ω
max. 20cm
ID ISC.MR200-W/EP
source, such as a
M50808-4de-ID-B.doc