UNICORECOMM UM982-EB, Руководство пользователя

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UC-08-M31 EN P1.0.3 Antenna circuit 11
Ant1
Ant2
J7
J5
Figure 4-3 Antenna Feed Circuit
Figure 4-2 Antenna Short Protection Circuit on the Bottom of UM982-EB
4.2 Antenna Feed Circuit
The antenna feed circuit consists of the anti-reverse current design, anti-surge design,
filter inductors, and ESD protection.
Removing R77 and R6 and soldering R79 and R8, you can directly use the 5 V power to
supply the antenna. In this condition, the antenna short protection circuit on UM982-EB
will be bypassed.
The ESD protection diode should support high-frequency signal (above 2000 MHz).
Nexperia PESD5V0F1BL is recommended here.