Multiconductor Analysis

Multiconductor Transmission Line Analysis

The program CONMTL includes a method of moments (MoM) technique. After the numerical computation of the equivalent surface charge distribution, which is the solution of a system of linear equations, the per-unit-length parameters are determined. This data is the basis for a subsequent evaluation of the transmission line Y matrix.


  • Per-unit-length parameter matrices [C’], [L’] for a large variety of cross sections including substrate or dielectric coating
  • S-parameter matrices for usage in external network solvers (Touchstone format)
  • Selected S-parameters as a function of frequency
  • E field distribution in the transmission line cross section

In HDF5 format the Y matrix of the transmission line can be loaded into the network solver CONCIRC where the corresponding conductors can by terminated by lumped loads for example.


Picture of CONMTL GUI

Graphical user interface (Source: TET, TUHH)

Picture of CONMTL GUI

Graphical user interface (Source: TET, TUHH)

Keywords: MTL, transmission line theory, free program, transmission line parameters, numerical computation, transmission line calculator, arbitrary cross section

CONMTL is combined work according to the LGPLv3 conditions.

  • Qt source code download
  • Instruction for relinking to a modified version of Qt PDF
Bild LGPLv3

(Source Wikipedia)

CONMTL uses the HDF5 format for storing data.