Every PCB substrate material influences how electrical signals propagate through copper traces, but at high frequencies this influence becomes the dominant factor determining whether a design succeeds or fails. The dielectric constant (Dk) and diss...

When signal frequencies climb past a few gigahertz, the properties of PCB materials stop being background physics and start being the primary determinants of circuit performance. At 10 GHz, a dielectric that behaves perfectly fine at 100 MHz can in...