NEO-8Q / NEO-M8 - Hardware integration manual
UBX-15029985 - Production information
Design
Page 13 of 14
C1-Public
☞
Consider the paste mask outline when defining the minimal distance to the next component. The
exact geometry, distances, stencil thicknesses and solder paste volumes must be adapted to the
specific production processes (e.g. soldering) of the customer.
Stencil: 150
µ
m
10.4 mm [409.5 mil]
14.6 mm [575 mil]
12.2 mm [480 mil]
0.
8 mm
[31.
5
mi
l]
0.
6 mm
[23.
5
mi
l]
2.4
Antenna
2.4.1
Antenna design with passive antenna
A design using a passive antenna requires more attention to the layout of the RF section. Typically, a
passive antenna is located near electronic components; therefore, care should be taken to reduce
electrical noise that may interfere with the antenna performance. Passive antennas do not require a
DC bias voltage and can be directly connected to the RF input pin
RF_IN
. Sometimes, they may also
need a passive matching network to match the impedance to 50
Ω
.
☞
Use an antenna that has sufficient bandwidth to receive all GNSS constellations. See the
Appendix.
Figure 6 shows a minimal setup for a design with a good GNSS patch antenna. For exact pin
orientation, see the corresponding product data sheet.
Figure 6: NEO-M8N/J/T/Q and NEO-8Q passive antenna design
Figure 7 and Figure 8 show designs using an external LNA and SAW to increase the sensitivity for
optimum performance with passive antenna. For exact pin orientation, see the corresponding product
data sheet.
Figure 5: NEO-8Q and NEO-M8 series paste mask NEO-8Q and NEO-M8 series footprint
12.2 mm [480.3 mil]
16.
0
m
m
[63
0
m
il]
1.0 mm
[39.3 mil]
0.
8 m
m
[31.
5
m
il]
0.8 mm
[31.5 mil]
3.
0 m
m
[118.
1
m
il]
1.
0 m
m
[39.
3
m
il]
1.
1 m
m
[4
3.
3
m
il]
