Data Sheet

R8002 Datasheet
-1 7-
As indicated in below, RF critical circuits of the module should be clearly separated from any digital circuits on the
system board. All RF circuits in the module are close to the antenna port. The module, then, should be placed in this
way that module digital part towards your digital section of the system PCB.
A
n
t
e
n
RF_IN
Digital Part
Non enmitting
circuits
Non enmitting
circuits
Digital & Analog Circuits
PCB
A
n
t
e
n
RF & heat
enmitting
circuits
Digital Part
RF_IN
Digital & Analog Circuits
RF & heat
enmitting
circuits
PCB
Figure 10: Placement the Module on a System Board
9.3.1 Antenna Connection and Grounding Plane Design
Antenna
Matching
Network
5mm
RF_IN
Figure 11: Leave 5mm Clearance Space from the Antenna
General design recommendations are:
The length of the trace or connection line should be kept as short as possible.
Distance between connection and ground area on the top layer should at least be as large as the dielectric
thickness.
Routing the RF close to digital sections of the system board should be avoided.
To reduce signal reflections, sharp angles in the routing of the micro strip line should be avoided. Chamfers or
fillets are preferred for rectangular routing; 45-degree routing is preferred over Manhattan style 90-degree
routing.
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