3.2.5 SMA
In order to use an external antenna, the SMA connector and relevant capacitors shal-
l be assembled. The 2.4GHz antenna Himalia from Würth Elektronik eiSos (order code
2600130021) is a perfect match:
https://www.we-online.de/katalog/en/WIRL_ACCE_2600130021
By default the internal PCB antenna is used.
SMA
Connection
Inner
Module RF pin
Outer
GND
Table 11: Pin header SMA
In order to use an external SMA antenna, 22 pF capacitor (0402) on position
C1 shall be assembled. 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 7: Capacitor connection to internal antenna
Thetis-I Mini Evaluation Board user manual version 1.0
© February 2021
www.we-online.com/wireless-connectivity
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