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Qucs is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window.

The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, harmonic balance analysis, noise analysis, etc.

QucsTranscalc is the transmission line tool used by Qucs.  The application was somewhat inspired by transcalc by Claudio Girardi and Gopal Narayanan.  It is based on transcalc's latest CVS version with some minor fixes incorporated.  The GUI has been ported from the GIMP toolkit (GTK) to Qt.

It is an analysis and synthesis tool for calculating the electrical and physical properties of different kinds of RF and microwave transmission lines.

For each type of transmission line, using dialog boxes, the user can enter values for the various parameters, and either calculate its electrical properties, or use the given electrical requirements to synthesize physical parameters of the required transmission line.

Available transmission lines are: Microstrip, Rectangular Waveguide, Coaxial Line, Coplanar and Coupled Microstrips.

The latest version of Qucs can always be obtained from https://sf.net/p/qucs

Known bugs are documented within the BUGS file.  Report bugs to qucs-bugs@lists.sourceforge.net

Copyright © 2005 Stefan Jahn <stefan@lkcc.org>

This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by Gopal Narayanan <gopal@astro.umass.edu>, Claudio Girardi <claudio.girardi@ieee.org>, Michael Margraf <michael.margraf@alumni.tu-berlin.de> and Stefan Jahn <stefan@lkcc.org>.