C_LIN
Coplanar Transmission Line
Parameters
Notes
Equivalent Circuit
Layout
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Coplanar Transmission Line

C_LIN represents a single coplanar line. The line dimensions are defined using the data item addressed by C_LTYP. L is the line length. The substrate data are defined in data item addressed by C_SUB.

Parameters  

Parameter Description
L  Line length (stretchable)
C_LTYP ID of data items with the geometrical dimensions of the coplanar transmission line
C_SUB ID of coplanar substrate definition
C_GRID ID of simulation control data
TEMP ID of element temperature definition used for noise computation

Notes

Equivalent Circuit  

For the modeling of the C_LIN element, a distributive equivalent circuit is used and the model parameter are derived from quasi-static FD-calculations. The DC and RF losses (represented by R) due to the skin effect are calculated using the surface current distribution on the conductors. The dielectric loss of the substrate material represented by G (see TAND in C_SUB) is also taken into account.

Layout

Different metallization levels can be used for the center line and the ground planes of a coplanar line. The layout of C_LIN is stretchable. Use menu point (Edit - Trace/Transmission Line - Stretch Transmission Line) in layout window in order to stretch the line. If the parameter GW_DEF in C_PROCES is set to a positive non-zero value, this value is used as ground width for layout generation (not for simulation).