WM_PRJ_Q2501_PTS_002
- 001
March
2004
confidential ©
Page:
66 / 79
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without prior written agreement.
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If soldered pigtail connection is used on the application board, it is
recommended to use the following routing:
Braid: Ground Connection
•
use thermal breaks in order to ease
soldering process
•
the braid must be soldered over 5 mm
long.
Please solder it as shown in the
picture.
•
The cable must «go» straight forward,
do not stress it (it may break).
Main conductor
•
Use 50
Ω
traces (StripLine or
MicroStrip)
Figure 39: Example of PCB routing for pigtail connection
Note: if a 2.5 mm diameter cable is used as pigtail, it is recommended to use
cable made with PTFE insulator type (Poly-Tetra-Fluoric-Ethylene, also called
“Teflon” like RG316) instead of PE (Poly-Ethylene, like RG174). Effectively,
during the manual soldering process, the PE is subject to melt because of the
high temperature.
4.2.5.3
RF circuit for GSM/GPRS function
The GSM/GPRS connector is intended to be directly connected to an antenna.
No special electronics is necessary between the two.
4.2.5.4
RF circuit for GPS function
Like the GSM/GPRS connector, the GPS connector is intended to be directly
connected to an antenna. As mentioned before, it is strongly recommended to
use an active antenna.
For more information, refer to paragraph 3.5.3 GPS antenna connection.
Summary of Contents for WISMO Quik Q2501
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