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A de-embedding algorithm for electromagnetics

✍ Scribed by Rautio, James C.

Book ID
102948565
Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
503 KB
Volume
1
Category
Article
ISSN
1050-1827

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✦ Synopsis

A "double delay" de-embedding algorithm appropriate for electromagnetic analyses is described. This algorithm uses only two standards, a through and a double length through. By evaluating these standards, a special class of port discontinuities may be characterized and removed from the data calculated for a complete structure. Unlike related physical deembedding algorithms, both the characteristic impedance and the velocity of propagation of the through lines are determined. The technique described here is difficult to implement in a physical de-embedding. The de-embedding theory also provides a new definition of characteristic impedance, "equivalent TEM impedance," for inhomogeneous media, such as microstrip. This new impedance exhibits a nonmonotonic dispersion which has been measured experimentally but is not seen using previous impedance definitions.

1991 J o h n Wilt\ X: Sons. Inc

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## Abstract Three parameters are needed to model symmetrical adapters, but not enough equations can be found to solve them. The proposed two‐impedance model with one shunt and one series impedance gives consistent results when applied to three different lengths of embedded microstrip transmission l