Standard Tier Module
Microstrip / TX-Line Calculator
Quasi-static microstrip calculator (Hammerstad-Jensen): analyze a trace width into Z0 and effective permittivity, or synthesize the width for a target impedance (e.g.
See it run - a worked example, 100% in this browser tab
What it is
Quasi-static microstrip calculator (Hammerstad-Jensen): analyze a trace width into Z0 and effective permittivity, or synthesize the width for a target impedance (e.g. 50 ohm). Reports phase velocity, guided wavelength, electrical length and first-order dielectric / conductor loss, with design curves of Z0 and eeff vs W/h. Standard closed-form line math that matches the line calculator in your EM tool; a design aid, not an EM solver.
Honest scope
Deterministic and citation-backed: every figure is exact arithmetic or a cited rule. Any year- or jurisdiction-indexed value is a confirmable input, never an eternal hardcode. This is a computation tool, not professional (legal, tax, medical, or financial) advice - confirm against the controlling authority for your context.
Authorities cited
- E. O. Hammerstad (1975). Equations for microstrip circuit design. Proc. 5th European Microwave Conf., 268-272. The synthesis/analysis closed forms.
- E. Hammerstad & O. Jensen (1980). Accurate models for microstrip computer-aided design. IEEE MTT-S Int. Microwave Symp. Digest, 407-409.
- D. M. Pozar, Microwave Engineering, 4th ed., Wiley 2012, section 3.8 (microstrip): eqs 3.195-3.198 used verbatim here.
- H. A. Wheeler (1977). Transmission-line properties of a strip on a dielectric sheet on a plane. IEEE Trans. MTT 25(8), 631-647. Thickness correction.
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Run it on your own data
Open it inside GDBS to save runs to Sandbox, attach results to a Worklog case, or share through a Gate client portal - all in the browser, nothing uploaded to anyone’s cloud.