Ground Segmentation - Sierra Wireless AirPrime XS1110 Product Technical Specification

Rev 4.0 Jul.20

Ground Segmentation

In general, the separation of ground between the module and the rest of the
system is recommended to avoid interference. If this is not possible, it is best to
follow these rules:
· segmentation of ground between digital and analog system
· high current and low current system
· different radiation systems such as GPS and GSM/WCDMA/LTE
One way to segment the ground is to place digital and noise components at one
corner of the board, while placing analog and quiet components at the opposite
corner of the board.
Note: Make sure there is no crossing of microstrip or current between the two component
sets with ground; each set is to be contacted to one point only.
Another method is to place the two different sets at different layers of the board,
while the ground of each layer is contacted at one point only which is ideally
located at the border of the board.
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General Rules for Circuit Design
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