G6
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
13
Figure 4-3 Pi network
RF_IN
GNSS
Module
Z1
Z2
D1
Z3
Circuit Design Cautions:
Element components in the above figures are capacitors, inductors, and 0Ω resistors. Place
these RLC components as close to the antenna interface as possible.
Add an ESD protector if the antenna might generate static electricity. The protector can be a TVS
diode with a junction capacitance of lower than 0.5 pF. Ensure that the reverse breakdown
voltage of the TVS is greater than 10 V (above 15 V is recommended).
G6 embeds an LNA, and no external LNA is required if a passive GNSS antenna is used.
PCB Design Cautions:
Lay copper foil around RF connector. Dig as many ground holes as possible on the copper to
ensure lowest grounding impedance.
The trace between G6 and the antenna connector, should be as short as possible. Control the
trace impedance to 50Ω.
If customers adopt SMA connector, big RF solder pad might result in great parasitic capacitance,
which will affect the antenna performance. Remove the copper on the first and second layers
under the RF solder pad.
Figure 4-4 Recommended RF PCB design
