Local geometry defines the RF lineBuy RT duroid 5880: Specification & Quotation. Engineering illustration, not a production photograph or test result.Local geometry defines the RF lineBuy RT duroid 5880: Specification & QuotationBuy RT duroid 5880: Specification & QuotationDielectric: use an appropriate model DkContinuous reference planeWidth WhAir / defined coverh is the distance to the reference plane, not total board thickness.