AMY-5M - Hardware Integration Manual
GPS.G5-MS5-08207-A3
Preliminary
Design-in
Page 32 of 54
2.9
Layout
This section provides important information for designing a reliable and sensitive GPS system.
GPS signals at the surface of the Earth are about 15dB below the thermal noise floor. Signal loss at the antenna
and the RF connection must be minimized as much as possible. When defining a GPS receiver layout, the
placement of the antenna with respect to the receiver, as well as grounding, shielding and jamming from other
digital devices are crucial issues and need to be considered very carefully.
2.9.1
Footprint
Figure 21: Recommended footprint (top view)
Units are in mm.
2.9.2
Paste mask
The paste mask
shall be 50µm smaller than the copper pads with a paste thickness of 100µm.
Be careful that the temperature gradients do not 2º/sec and -4º/sec.
The paste mask outline needs to be considered when defining the minimal distance to the next
component.
These are recommendations only and not specifications. The exact geometry, distances, stencil thicknesses
and solder paste volumes must be adapted to the specific production processes (e.g. soldering etc.) of the
customer.
