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Tunable multiport system for measurement of two-port scattering parameters

Published online by Cambridge University Press:  17 August 2015

Kamil Staszek ,
Slawomir Gruszczynski  and
Krzysztof Wincza
Kamil Staszek
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland. Phone: +48-12 617-30-21
Slawomir Gruszczynski*
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland. Phone: +48-12 617-30-21
Krzysztof Wincza
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland. Phone: +48-12 617-30-21
*
Corresponding author: S. Gruszczynski Email: slawomir.gruszczynski@agh.edu.pl
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Abstract

A novel multiport system, allowing for measurements of scattering parameters in over-two-octave frequency range is proposed. It is composed of two directional couplers and a standard 4 × 4 Butler matrix, and does not require any isolators. The presented system features a uniform power distribution providing the high precision of measurements, which can be further enhanced by a simple adjustment of the system's parameters. A comprehensive analysis of the proposed system configurations, a fully analytical calibration for transmission coefficient measurement, and the estimation of maximum measurement error are given. The proposed measuring system has been experimentally verified in a wide frequency range 1–5 GHz, by measurements of S-parameters of exemplary components. The measurement results are very close to the values obtained with the use of a commercial vector network analyser within the 50 dB range of measured values’ magnitude.

Keywords

Microwave measurementsPassive components and circuits
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 1 , February 2017 , pp. 99 - 112
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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