According to these calculations, the 1/10 rule is not a great pick if your target is a mismatch loss of less than ... with how variable the dielectric constant of FR4 PCB material can be between ...

Denka launches Snecton, a low dielectric organic insulating resin with the electrical properties (low dielectric constant and ...

Every PCB house and line within it is different from the next, so it is critical to get hold of the layer arrangement, foil and dielectric thicknesses, dielectric constants, and loss tangent figures.