Smart Module Series
SC606T Series Hardware Design
SC606T_Series_Hardware_Design 77 / 116
⚫
In user systems, GNSS RF signal traces and RF components should be placed far away from
high-speed circuits, switched-mode power supplies, power inductors, the clock circuit of single-chip
microcomputers, etc.
⚫
For applications with a harsh electromagnetic environment or high ESD-protection requirements, it is
recommended to add ESD protection diodes for the antenna interface. Only diodes with ultra-low
junction capacitance such as 0.5 pF can be selected. Otherwise, there will be effects on the
impedance characteristic of the RF circuit loop or attenuation of the bypass RF signal may be
caused.
⚫
Control the impedance of both the antenna feeder and PCB trace at 50
Ω, and keep the trace length
as short as possible.
⚫
See
Chapter 6.3
for GNSS antenna reference circuit designs.
