Choose the right Dk for the geometryMicrostrip fields occupy both the substrate and the air above it.Choose the right Dk for the geometryMicrostrip fields occupy both the substrate and the air above it.Air above the linewDielectricContinuous reference planehThree different quantitiesProcess Dk → material testingDesign Dk → circuit modelEffective Dk → propagationGrounded coplanar, solder mask and finite copper change this geometry.³Ô¹Ïtv engineering illustration · Conceptual, not a released drawing or measured result