Local geometry defines the RF lineNan Ya vs Isola vs Rogers PCB materials: Constructio…. Engineering illustration, not a production photograph or test result.Local geometry defines the RF lineNan Ya vs Isola vs Rogers PCB materials: Constructio…Nan Ya vs Isola vs Rogers PCB materials: Constructio…Dielectric: use an appropriate model DkContinuous reference planeWidth WhAir / defined coverh is the distance to the reference plane, not total board thickness.