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Microstrip Trace-Width Estimator (Rogers)
Estimate the microstrip trace width for a target characteristic impedance on a Rogers substrate, using the IPC-2141 microstrip model. A first-pass number to size your layout — PCBark verifies the final value with TDR on test coupons.
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IPC-2141 single-ended microstrip approximation (reference plane below the trace). Real impedance also depends on solder mask, etch tolerance, and copper roughness — always confirm with the fab.
