Local geometry defines the RF lineRogers 77 GHz radar PCB: Material & Design Decisions. Engineering illustration, not a production photograph or test result.Local geometry defines the RF lineRogers 77 GHz radar PCB: Material & Design DecisionsRogers 77 GHz radar PCB: Material & Design DecisionsDielectric: use an appropriate model DkContinuous reference planeWidth WhAir / defined coverh is the distance to the reference plane, not total board thickness.