User's Manual

VZ22Q LTE Module
V0.1
USI
Confidential Page 23 of 23
8. Grounding
i. The ground between module and main board should be well connected.
ii. Good ground management could enhance module performance. It would ensure signal
integrity, upgrade RF performance, reduce EMI, and cool down devices.
iii. Notice structure of RF trace. Reference ground should be fully in side of the trace.
iv. Audio and clock signals should be wrapped by ground to isolate the interference and sensitive
signals.
v. Note continuity of reference plane for each signal, and avoid crossing the spilt plane to get
the shortest path of return current.