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Performance of thru-only cascade de-embedding methods and their variants that use a Π- or a T-equivalent to represent and bisect a symmetric THRU is assessed. The results from the Π- and T-based methods are reasonable at low frequencies. However they are shown to deviate noticeably from the correct results as the frequency gets high or, equivalently, when the length of the THRU approaches an effective...
Theory and experiments are presented of modal decomposition of scattering matrices of multiconductor transmission lines (TLs). In effect, n coupled TLs are decomposed into n independent ones. Its use is demonstrated by applying it to thru-only de-embedding of 4 coupled TLs (synthesized data) and 2 coupled TLs (measurement data from a 0.18 mum-CMOS chip). The proposed de-embedding method could greatly...
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