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De‐embedding of filters in multiplexers via rational approximation and interpolation
Author(s) -
Seyfert Fabien,
Oldoni Matteo,
Olivi Martine,
Lefteriu Sanda,
Pacaud Damien
Publication year - 2015
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20903
Subject(s) - multiplexer , interpolation (computer graphics) , representation (politics) , embedding , a priori and a posteriori , filter (signal processing) , scattering , microwave , algorithm , computer science , feature (linguistics) , electronic engineering , mathematics , physics , engineering , artificial intelligence , multiplexing , telecommunications , optics , motion (physics) , philosophy , linguistics , epistemology , politics , political science , law , computer vision
In this article, we present a method to recover electrical parameters of filters embedded in a multiplexer for which scattering measurements are given. Unlike other approaches proposed for this problem, this method does not require a priori knowledge of the scattering parameters of the junction. This feature renders the procedure well suited for tuning purposes or for fault diagnosis. Technically, the algorithm starts with a rational approximation step, to derive a rational representation of certain scattering parameters of the multiplexer. This representation is then used in a second step to identify an electrical model of each filter. This second step relies on a rational interpolation technique used to extract the filter's responses. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:647–654, 2015.
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