Coplanar

Currently the standard library includes several components in the microstrip tool box. A tool box is just a directory with the description of models in it.

Remember the arguments are case sensitive, and you can use units.

Properties (TinyCAD only)

These values are translated into the variable block on the text file version of Mason. If you are manually writing the Mason file, you probably want to add these values to the variable block yourself to maintain consistency throughout the design.

  1. eps_r: the permittivity of the dielectric

  2. height_cpw: the dielectric height (in meters)

  3. loss_tan: the loss tangent of the material

  4. cu_thickness: thickness of the copper (in meters)

  5. cu_sigma: the conductivity of the metal (Siemens per meter)

cpw_line

This is a straight low loss coplanar waveguide line without ground plane. In TinyCAD many of these values are set equal to the variables defined in the Properties block.

  1. width: the metal width (in meters)

  2. gap: the gap between signal and ground (in meters)

  3. length: the length of the microstrip line (in meters)

  4. eps_r: the permittivity of the dielectric

  5. height_d: the dielectric height (in meters)

  6. loss_tangent: the loss tangent of the material

  7. cu_thickness: thickness of the copper (in meters)

  8. cu_sigma: the conductivity of the metal (Siemens per meter)

cpwgp_line

This is a straight low loss coplanar waveguide line with a ground plane. In TinyCAD many of these values are set equal to the variables defined in the Properties block.

  1. width: the metal width (in meters)

  2. gap: the gap between signal and ground (in meters)

  3. length: the length of the microstrip line (in meters)

  4. eps_r: the permittivity of the dielectric

  5. height_d: the dielectric height (in meters)

  6. loss_tangent: the loss tangent of the material

  7. cu_thickness: thickness of the copper (in meters)

  8. cu_sigma: the conductivity of the metal (Siemens per meter)

cpw_curve

    1. This is a curved coplanar waveguide line without ground plane. In TinyCAD many of these values are set equal to the variables defined in the Properties block.width: the width of the signal line (in meters)

    2. gap: the gap between signal line and ground (in meters)

    3. radius: the radius of the curved line (in meters)

    4. angle: the length of the curve (in degrees) [for PADS Layout output, keep under 90-degrees]

  1. eps_r: the permittivity of the dielectric

  2. height_d: the dielectric height (in meters)

  3. loss_tangent: the loss tangent of the material

  4. cu_thickness: thickness of the copper (in meters)

  5. cu_sigma: the conductivity of the metal (Siemens per meter)

cpwgp_curve

  1. This is a curved coplanar waveguide line with ground plane. In TinyCAD many of these values are set equal to the variables defined in the Properties block.width: the width of the signal line (in meters)

  2. gap: the gap between signal line and ground (in meters)

  3. radius: the radius of the curved line (in meters)

  4. angle: the length of the curve (in degrees) [for PADS Layout output, keep under 90-degrees]

  5. eps_r: the permittivity of the dielectric

  6. height_d: the dielectric height (in meters)

  7. loss_tangent: the loss tangent of the material

  8. cu_thickness: thickness of the copper (in meters)

  9. cu_sigma: the conductivity of the metal (Siemens per meter)

cpw_lintaper

This is an approximation to a short tapered coplanar waveguide without ground plane, to lessen parasitic capacitances in a sharp impedance transition. In TinyCAD many of these values are set equal to the variables defined in the Properties block.

  1. W1: the metal width for port 1 (in meters)

  2. W2: the metal width for port 2 (in meters)

  3. gap1: the gap from signal to ground for port 1 (in meters)

  4. gap2: the gap from signal to ground for port 2 (in meters)

  5. length: the length of the microstrip line (in meters)

  6. eps_r: the permittivity of the dielectric

  7. height_d: the dielectric height (in meters)

  8. loss_tangent: the loss tangent of the material

  9. cu_thickness: thickness of the copper (in meters)

  10. cu_sigma: the conductivity of the metal (Siemens per meter)

cpwgp_lintaper

This is an approximation to a short tapered coplanar waveguide with a ground plane, to lessen parasitic capacitances in a sharp impedance transition. In TinyCAD many of these values are set equal to the variables defined in the Properties block.

  1. W1: the metal width for port 1 (in meters)

  2. W2: the metal width for port 2 (in meters)

  3. gap1: the gap from signal to ground for port 1 (in meters)

  4. gap2: the gap from signal to ground for port 2 (in meters)

  5. length: the length of the microstrip line (in meters)

  6. eps_r: the permittivity of the dielectric

  7. height_d: the dielectric height (in meters)

  8. loss_tangent: the loss tangent of the material

  9. cu_thickness: thickness of the copper (in meters)

  10. cu_sigma: the conductivity of the metal (Siemens per meter)

cpw_tee2

This is a lossless coplanar waveguide tee-junction. In TinyCAD many of these values are set equal to the variables defined in the Properties block. A and B ports branch off of port 1.

  1. W1: Port 1 width (in meters)

  2. Wa: Port a width (in meters)

  3. Wb: Port b width (in meters)

  4. gap1: Port 1 gap from signal to ground (in meters)

  5. gapA: Port a gap from signal to ground (in meters)

  6. gapB: Port b gap from signal to ground (in meters)

  7. eps_r: the permittivity of the dielectric

  8. height_d: the dielectric height (in meters)

  9. cu_thickness: thickness of the copper (in meters)

  10. cu_sigma: the conductivity of the metal (Siemens per meter)

  11. height_air_bridge: air bridge height for the ground connection (in meters)

  12. width_air_bridge: air bridge height for the ground connections (in meters)

Copyright 2010, Gregory Kiesel