WM_PRJ_Q2501_PTS_002
- 001
March
2004
confidential ©
Page:
64 / 79
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without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à
des tiers sans son autorisation préalable.
If multi-layer PCB is used, the RF path on the board must not cross any
signals (digital, analog or supply).
If necessary, use StripLine structure and route the digital line(s)
“outside” the RF structure as shown in the figure below:
Bad routing
Correct Routing
The yellow traces cross the RF
trace.
There is no signal around the RF
path.
Stripline and Coplanar design require to have a correct ground plane at
both sides. Consequently, it is necessary to add some vias along the RF
path.
It is recommended to use Stripline design if the RF path is fairly long
(more than 3 cm), since MicroStrip design is not shielded.
Consequently, the RF signal (when transmitting) may interfere with
neighboring electronics (AF amplifier…). In the same way, the
neighboring electronics (micro-controller) may degrade the reception
performances.
Summary of Contents for WISMO Quik Q2501
Page 69: ......
