How Dielectric Height H Changes Differential Pair Impedance The Most Sensitive Variable
In high-speed PCB design, dielectric height (H) changes differential pair impedance more than any other variable. Understanding this sensitivity is critical for achieving 100 Ohm or 90 Ohm impedance targets in your custom high-speed PCB. Among all variables—trace width (W), trace spacing (S), copper thickness (T), and dielectric constant (Dk)—dielectric height (H) stands out as…