The RF pin of module can be coupled to on-board PCB antenna or an external antenna.
Two variants of the Proteus-III are certified:
• For the on-board PCB antenna: 22pF shall be assembled on C28.
–
If additional tuning is needed in the end application, C27 and C26 can be assem-
bled.
–
The exact values of C27 and C26 shall be specified in the end application corre-
sponding to the individual need.
Figure 30: On-board PCB antenna
• For the external antenna: 22pF shall be assembled on C6.
–
If additional tuning is needed in the end application, C21 and C26 can be assem-
bled.
–
The exact values of C21 and C26 shall be specified in the end application corre-
sponding to the individual need.
Figure 31: External antenna connection
To reference to the Würth Elektronik eiSos’ FCC ID it is mandatory to use the
trace design.
Proteus-III reference manual version 1.3
© August 2020
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