Local geometry defines the RF lineRogers RO4000 PCB: Design & Manufacturing. Engineering illustration, not a production photograph or test result.Local geometry defines the RF lineRogers RO4000 PCB: Design & ManufacturingRogers RO4000 PCB: Design & ManufacturingDielectric: use an appropriate model DkContinuous reference planeWidth WhAir / defined coverh is the distance to the reference plane, not total board thickness.