GLOBALSAT ET-314 GPS Engine Board - Manual (Page 21)

ET-314AC
High Performance GPS Engine Board
2010/4/1
- 21 -
PCB Layout Recommend
Recommended Layout PAD
Unit: mm
Tolerance:
0.1mm
PCB Layout Recommendations
Do not routing the other signal or power trace under the engine board.
RF:
This pin receives signal of GPS analog via external active antenna .It has to be a controlled
impedance trace at 50ohm.
Do not place the RF traces close to the other signal path and not routing it on the top layer.
Keep the RF traces as short as possible.
Antenna:
Keep the active antenna on the top of your system and confirm the antenna radiation pattern、
axial ratio、power gain、noise figure、VSWR are correct when you Setup the antenna in your case.