Microstrip characteristic impedance for FR-4 at 10 Ghz

The characteristic impedance of microstrip changes at frequency owing to changes in the effective permittivity of the substrate. We analyzed this at 10 Ghz for a 0.062 inch substrate, with 1 oz copper and plotted the curve for Z0 ( characteristic impedance) change versus width of the microstrip. This is shown below. For more information on this and other interesting topics please visit the Signal Processing Group Inc. website.

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