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Phase Spec: Coupled Lines (Closed Form): CLIN



CLIN simulates a pair of symmetric coupled lossless transmission line that supports pure TEM mode of propagation. Model implies that line length is specified as electrical length (phase lag of mode propagating along the line) at user specified frequency. User must supply values of odd and even characteristic impedances.


Name Description Unit Type Default
ID Name Text TL1
ZE Even mode characteristic impedance Resistance 50 ohm
ZO Odd mode characteristic impedance Resistance 100 ohm
EL Electrical length (phase length) at F0 Angle 90 Deg
F0 Frequency reference for electrical length Frequency 10 GHz

Parameter Details

EL and F0. These parameters determine the frequency dependence of the electrical length of the line, described as βL=EL· freq/Fo · π/180 where freq is the evaluation frequency. EL specifies phase lag of propagating TEM mode, that is it accounts for effective dielectric constant of line. Note that even and odd phase velocities are implied equal in this model.

ZE and ZO. Even and odd characteristic impedances are used to obtain entries of line Y-matrix.


This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.

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