Local geometry defines the RF lineRO4003C vs RO3003 for RF PCB designs. Engineering illustration, not a production photograph or test result.Local geometry defines the RF lineRO4003C vs RO3003 for RF PCB designsRO4003C vs RO3003 for RF PCB designsDielectric: use an appropriate model DkContinuous reference planeWidth WhAir / defined coverh is the distance to the reference plane, not total board thickness.