Data Sheet

FSC‐BT646Datasheet

 ShenzhenFeasycomTechnologyCo.,Ltd   www.feasycom.com
‐18‐
Asindicatedinpicture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.


RF_IN
DigitalPart
Nonenmitting
circuits
Nonenmitting
circuits
Digital&AnalogCircuits
PCB
 
Figure9:PlacementtheModuleonaSystemBoard

  9.3.1  AntennaConnectionandGroundingPlaneDesign


Figure10: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.



