An improved multiline TRL method

Abstract

This paper presents a multiline TRL (Thru-Reflect Line) method that is based on a straightforward de-embedding method and a reliable method for determining a each frequency the value of a/c, b, and e-¿1 terms. The main features of the proposed multiline TRL are: a) The transmission line propagation constant is not used, therefore the physical lengths of the lines are not needed, and b) The Gauss-Markov method is used only to estimate the best values of the constants a/c and b. The S parameters of an offset short, an offset open, and a load, measured in the frequency range of 1-50 GHz, corrected with the multiline TRL method from NIST and the multiline TRL method from CICESE agree each other.