3.3.5 SMA
SMA connector is used to connect an external antenna.
The 2.4 GHz antenna Himalia (2600130021) is a perfect match.
SMA
Connection
Inner
Module RF pin
Outer
4 x GND
Table 14: Pin header SMA
In order to use an external SMA antenna, 22 pF capacitor (0402) on position
C1 shall be populated. C2, C8, C11 and C12 should be left unpopulated.
Optional: Experts have the possibility to use C11, C1 and C8 for additional
filtering or fine tuning.
Figure 5: Capacitor connection to external antenna
In order to use the internal PCB antenna of the module, a 2.4 nH inductor
(0402) on position C2 and a 0.3 pF capacitor (0402) on position C12 shall be
populated respectively. C1, C8 and C11 should be left unpopulated.
Figure 6: Capacitor connection to internal antenna
Mini evaluation board user manual version 1.3
© June 2021
www.we-online.com/wireless-connectivity
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