u-blox SAM-M8Q Integration Manual

Contents

u-blox SAM-M8Q Integration Manual Manual pdf 13 page image

SAM-M8Q - Hardware Integration ManualUBX-16018358 - R05 Production Information DesignPage 13 of 232.6 PCB layout suggestionFor good performance, it is essential to have a proper layout and placement.Figure 8: Layout recommendation (top layer)SAM‑M8Q GNSS patch antenna module is intended to be placed in the middle of 50 x 50 mm GND size board,but a larger or smaller ground plane can be used. When using smaller than 40 x 40 mm ground plane, theperformance may get decreased significantly.Some important recommendations: Easy to connect, but make sure all noisy lines / components are shielded or on inner layers Do not place any noisy parts close to SAM-M8Q, place them as far away as possible or on other side of PCB It is recommended not to place anything closer than 1 cm to each edge of SAM-M8Q Performance goes significantly down if GND size is smaller than 40 x 40 mm Use at least one layer for solid GND plane, preferably the layer SAM-M8Q is placed on it Use solid GND plane under SAM-M8Q, which forms the shield. No signal traces allowed below SAM-M8Q Route signal traces away from the module on top layer When necessary, allow signal swap from top to bottom layer clearly away from module > 20 mm Use copper pour ground planes on top and bottom layers; use multiple GND net via holes to tie separateground plane areas tightly together