JADAK a business unit of Novanta Corporation SM-MN-SH Manuel D’Utilisation
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11
Antenna Options
11.1
Read Range
In general, read range depends on the RFID Transponder’s IC and antenna, and the RFID reader and reader antenna,
in addition to the environment in which the system is implemented.
The M1-Mini has a read/write distance that is typically greater than or equal to 50.8 mm (2 inch) for a Texas
Instruments Tag-It HF-I (ISO15693) RFID inlay with antenna dimensions 22.5 mm x 38 mm (TI p/n RI-I03-112A)
11.2
Antenna Configurations
By default the internal antenna of the M1-Mini is connected during production. In the event that the user wants to
connect an external antenna between the INT and ANT pins of the M1-Mini, refer to Table 14-1.
Figure 9: M1-Mini internal antenna schematic
Table 11-1: M1-Mini Internal Antenna Configuration Details
Internal Ant Active?
Custom External Antenna?
Remove
Populate
N
Y
C
series
-
Y
N
C
series
NOTE
– Place custom antenna between pin 2 (ANT) and pin 1 (GND). Refer to AN001 for more information on how
to make your own custom antenna.
The default M1-Mini configuration:
•
R
series
= shorted (connects the transmit and the receive path together)
•
C
series
= 220pF (This is essentially used to match the internal antenna to the output of the transceiver IC)
•
C
parallel
= 2000pf (This is the tuning cap value for the internal antenna)
•
R
damp
= unpopulated (R
damp
can be used to change the Q of the antenna circuit)