OBID
®
Manual
ID RW01L.AB-A
FEIG ELECTRONIC GmbH
Page 9 of 39
H20801-1e-ID-B.doc
1.7. Connecting an external antenna
In place of the antenna on the ID RW01L.AB-A, you may connect an external antenna to terminals
ANT1 and ANT2 (X1). When connecting an external antenna, you must separate the two connections
on the onboard antenna.
Note the following when dimensioning and tuning the antenna.
Antenna parameters
- Recommended max. dimensions 70 x 70 mm
- Antenna coil material
:
Lacquered copper wire
- Antenna coil wire thickness:
0.2 mm
- Inductance:
737
±
7
µ
H
- Resistance:
10
±
1
Ω
- Intrinsic capacitance
< 120 pF
Test points
:
ANT2
Antenna signal:
GND
Reference potential
Fig. 2: Antenna signal between ANT2 and GND
Test values
Upp:
10 V
f:
125 kHz
NOTE:
The reader is designed for operating only one antenna. Operating 2 parallel switched antennas
may damage the reader, or at least have a negative impact on the read range of the reader.