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Accurate broadband multiport reflectometer
Author(s) -
Staszek Kamil,
Gruszczynski Slawomir,
Wincza Krzysztof
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28729
Subject(s) - broadband , microwave , optical time domain reflectometer , reflection coefficient , optics , power dividers and directional couplers , reflection (computer programming) , hybrid coupler , system of measurement , electronic engineering , engineering , physics , computer science , telecommunications , optical fiber , fiber optic sensor , fiber optic splitter , astronomy , programming language
ABSTRACT A novel broadband multiport reflectometer, consisting of a standard 4 × 4 Butler matrix and an additional directional coupler is proposed. It is shown that such a reflectometer provides highly uniform tunable measurement conditions allowing for measurement precision enhancement. The impact of the applied directional coupler's imperfections on the measurement conditions has been theoretically analyzed. The high measurement accuracy of the proposed reflectometer has been proved experimentally by reflection coefficient measurements over the frequency range of 1–5 GHz, which show a good agreement with the results obtained using VNA. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2884–2887, 2014