Contents

• List of Figures
  • Introduction
  
  
• gd1
  • Typical usage of gd1
  • Input for gd1
  • Behind the scenes: When the mesh is generated
  • General sections
    • Entry Section
    • -general : Annotations, filenames
    • -mesh : outer boundary conditions, spacings
    • -material : electric / magnetic properties
    • -lgeometry : load a previously used geometry
  • Geometric primitives
    • -brick: a rectangular brick
    • -gccylinder: A circular cylinder in general direction
    • -ggcylinder: A general cylinder in general direction
    • -gbor: A general body of revolution in general direction
    • -stlfile: CAD import via STL-file
    • -geofunction: Analytic description
    • -transform: Rotations, translations
  • -volumeplot: shows the generated mesh
  • -cutplot: shows the generated mesh in a selected meshplane
  • Solver sections: Eigenvalues and driven time domain problems
    • -eigenvalues
    • -fdtd: Compute time dependent fields
    • -fdtd/-ports
    • -fdtd/-pexcitation: What port-mode should be excited
    • -fdtd/-lcharge: Properties of relativistic line charges
    • -fdtd/-windowwake: Wakepotential in a moving computational window
    • -fdtd/-clouds: Properties of nonrelativistic clouds of charge
    • -fdtd/-linitialfields: Specifies the initial fields
    • -fdtd/-voltages: Voltage sources between selected points
    • -fdtd/-decaytime: Z-dependent damping factor
    • -fdtd/-time: minimum / maximum time, when to store
    • -fdtd/-storefieldsat: when to store
    • -fdtd/-fexport: ASCII export of selected fields at selected times
    • -fdtd/-smonitor: Monitoring of scalar field quanitities
  
  
• gd1.pp
  • -base
  • -general
  • -3darrowplot: Plots 3D Fields together with the material boundaries.
  • -lineplot: Plots a field component along an axis.
  • -glineplot: Plots a field component along a line.
  • -2dplot: Plot a component on a plane
  • -energy: compute energy in E or H fields
  • -lintegral: computes line integrals
  • -wlosses: Compute wall losses from H-fields
  • -dlosses: Compute dielectric losses
  • -flux: Compute flux of fields through rectangular areas
  • -clouds: Analyse properties of free moving charges
  • -sparameters: Computes scattering parameters from time dependent data
  • -material: Conductivities of electric materials
  • -wakes: longitudinal and transverse wakepotentials
  • -totouchstone: convert fri-data to touchstone format
  • -combine: Build scattering matrices from other scattering parameters
  • -smonitor: analyse scalar time dependent signals
  • -fexport: export 3D-Fields to ASCII files
  • -2dmanygifs: Create many gif files
  • -3dmanygifs: Create many gif files
  
  
• GdfidLs command language
  • Variables
    • Defining variables from outside
  • Arithmetic expressions
  • do-loops
  • if elseif else endif
  • Macros
  • Result-variables
  
  
• Supplied Macros
  • Q-Values
    • Q-Values: Real fields
    • Q-Values: Complex fields
  • Computing normalized shunt impedances
    • R/Q: Real fields
    • R/Q: Complex fields
  
  
• Examples
  • Wake Potentials
  • Scattering Parameters
  • Computing Brillouin-diagrams