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RECONSTRUCTION OF THE S-MATRIX OF N-PORT WAVEGUIDE RECIPROCAL DEVICES FROM 2-PORT VNA MEASUREMENTS

By L. Zappelli

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Abstract:
Two approaches to reconstruct the S-matrix of N-port waveguide reciprocal devices from 2-port S-matrix measurements are proposed and discussed. The main advantage of the proposed approaches is that measurements are done always at the same two ports, without moving the device. The remaining N-2 ports are loaded with different loads, either matched or short. The first approach, based on a manipulation of the 2-port S-matrices, requires N-2 matched and two other loads, while the second approach, based on the evaluation of an equivalent circuit, requires N-2 short and two other loads. The measurement technique is based on the standard loads (short, shift and matched) in the waveguide calibration kit of the 2-port VNA.

Citation:
L. Zappelli, "Reconstruction of the S-Matrix of n -Port Waveguide Reciprocal Devices from 2-Port VNA Measurements," Progress In Electromagnetics Research B, Vol. 72, 129-148, 2017.
doi:10.2528/PIERB16102402

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