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.
Summary of Contents for UM982-EB
Page 24: ...Assembly Top of UM982 EB...
Page 25: ...Assembly Bottom of UM982 EB...
