De‐embedding of filters in multiplexers via rational approximation and interpolation |
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Authors: | Fabien Seyfert Matteo Oldoni Martine Olivi Sanda Lefteriu Damien Pacaud |
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Affiliation: | 1. INRIA, Route des Lucioles—BP 93—06902 Sophia Antipolis Cedex, France;2. SIAE Microelettronica S.p.A., via M, Cologno Monzese (MI), Italy;3. Thales Alenia Space, Toulouse, France |
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Abstract: | 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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Keywords: | diplexer filter tuning fault diagnosis de‐embedding rational approximation Padé interpolation |
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