Abstract

Based on the ten-term error model of a two-port vector network analyzer (VNA) measurement system, the TRL (Thru-Reflect-Line) calibration is implemented. Then ten error terms of fixtures are derived directly from the S parameters of the calibration kits measured from the coaxial reference plane without converting S parameters to T parameters. To test our algorithm, two test boards with different via diameters are designed and measured. By comparing with Engen's TRL algorithm it is certified that those equations are available over a wide frequency range.

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