TEM equivalent circuits for quasi-TEM couplers
- 4 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 387-390 vol.1
- https://doi.org/10.1109/mwsym.1990.99601
Abstract
Equivalent circuits for quasi-TEM (transverse electromagnetic) coupled lines have been developed for symmetric lines (C/sub 1/=C/sub 2/) and for asymmetric lines having a congruent LC matrix. It is shown that the congruence assumption is very general. The error is insignificant provided the line width is narrower than the substrate thickness, a condition generally met in practical circuits. These equivalent circuits are easy to implement using a computer-aided engineering (CAE) system such as TOUCHSTONE, which accepts and correctly calculates ideal transmission line performance even for negative characteristic impedances.<>Keywords
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