12
Antenna Circuit
UC-08-M37 EN R1.0
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 R45 and soldering R46, the antenna short protection circuit is bypassed. Then
you can use the 5 V DC/DC circuit output directly to feed the antenna.
The ESD protection diode should support high-frequency signal (above 2000 MHz).
Nexperia PESD5V0F1BL is recommended here.
Ant
J5
Ant Bias
U4
FPF2004
Figure 4-3 Antenna Feed Circuit
Figure 4-4 Antenna Feed Circuit on the Bottom of EB
