A new definition of characteristic impedance
- 9 December 2002
- proceedings article
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Existing two-dimensional definitions of characteristic imped- ance can result in a wide range of values for the characteristic impedance of a given transmission line in inhomogeneous me- dia. This paper suggests a three-dimensional definition, the "TEM Equivalent" characteristic impedance, which is unique for any given transmission line geometry and is appropriate for use in circuit theory applications. Comparisons with two-di- mensional results and comparisons with measurements are pre- sented. The TEM equivalent characteristic impedance rdso shows a non-monotonic dispersion which is not seen in the usu- al two-dimensional definitions but is seen in experimentally.Keywords
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