Experimental determination of the characteristic impedance matrix of multiconductor quasi-TEM lines

✍ Scribed by C. Seguinot; E. Paleczny; F. Huret; J. F. Legier; P. Kennis

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 97 KB
• Volume: 22
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19990920)22:6<429::aid-mop19>3.0.co;2-1

✦ Synopsis

However, we can infer that the compression has the effect of increasing the cutoff value, thereby giving a reduction in the number of sustained modes for a given V-value.

It is also necessary to verify whether the cutoff equation is consistent with the characteristic equation. For this, one Ž . refers to Figure 2, where the LHS of Eq. 12 is plotted 2 2 2

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against Ua where U s K n y ␤ . There are five zero 1 1 crossings at Ua s 2.6, Ua s 7.2, Ua s 12.2, Ua s 16.8, and Ua s 21.6. Now, we know that, at cutoff, W s 0 and V s Ua.

We consult Figure 3 to determine the cutoff values, which must correspond to the values of V for bЈ s 0. These values are 2. 65, 7.79, 12.45, 17.12, and 21.79, showing that Figures 2 and 3 are consistent.

ACKNOWLEDGMENT

The authors express their sincere indebtedness and gratitude to Prof. P. Khastgir for his valuable discussion.