LEA-M8S / LEA-M8T - Hardware integration manual
UBX-15030060 - R06
Design
Page 14 of 33
Production information
17.0 mm [669 mil]
2
2
.4
m
m
[
8
8
1
.9
m
il
]
1.0 mm
[39 mil]
0
.8
m
m
[3
1
.5
m
il
]
2
.4
5
m
m
[9
6
.5
m
il
]
1
.1
m
m
[4
3
m
il
]
3
.0
m
m
[1
1
8
m
il
]
2
.1
5
m
m
[8
4
.5
m
il
]
0.8 mm
[31.5 mil]
Figure 5: LEA-M8S and LEA-M8T footprint
Figure 6: LEA-M8S and LEA-M8T paste mask
2.4
Antenna
☞
For exact pin orientation in any design, see the LEA-M8S Data sheet [1] and the NEO / LEA-M8T
Data sheet [2].
☞
For recommended parts, see Appendix B.
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, take care 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
.
☞
Use an antenna that has sufficient bandwidth to receive all GNSS constellations. For
recommended parts, see Appendix B.
Minimal setup with a good patch antenna
Figure 7 shows a minimal setup for a design with a good GNSS patch antenna.
