C_LIN
Coplanar Transmission Line
Parameters
Notes
Equivalent Circuit
Layout
COPLAN Software Description
List of Topics
Download Manual
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).