Adding a Load

Apply an impedance load to a wire port, microstrip port, FEM line port, a general network or an ideal transmission line.

  1. On the Source/Load tab, in the Loads/Networks group, click the  Add Load icon.


    Figure 1. The Create Load dialog.
  2. From the Port drop-down list, select a port.
  3. Under the Load type drop-down list, specify one of the following:
    • Complex impedance
      • In the Real part field, specify the real part of the complex impedance in Ohm.
      • In the Imaginary part field, specify the imaginary part of the complex impedance in Ohm.
    • Series circuit
      • To specify a resistor, select the Resistor check box and in the Resistor (Ohm) field, enter a value in Ohm.
      • To specify an inductor, select the Inductor check box and in the Inductor (H) field, enter a value in Henry.
      • To specify a capacitor, select the Capacitor check box and in the Capacitor (F) field, enter a value in Farad.

      If no option is selected, the result is a short circuit.

    • Parallel circuit
      • To specify a resistor, select the Resistor check box and in the Resistor (Ohm) field, enter a value in Ohm.
      • To specify an inductor, select the Inductor check box and in the Inductor (H) field, enter a value in Henry.
      • To specify a capacitor, select the Capacitor check box and in the Capacitor (F) field, enter a value in Farad.

      If no option is selected, the result is an open circuit.

    • SPICE circuit
      • In the Filename field, browse for a one-port SPICE circuit file (.cir) to define a load between two pins.
        Note:
        • Feko supports only a subset of Berkeley SPICE3f5 syntax.
        • Only linear circuits are supported.
      • Specify a subcircuit defined in the .cir file.
        • Clear the Auto check box.
        • In the Circuit name field, specify the subcircuit name.
        Note: Circuit name must correspond to the subcircuit name in the .cir file.
    • Touchstone file
      • In the Filename field, browse for a one-port Touchstone file (.s1p, .z1p, .y1p).
        Note: If the load is added to a port that has a voltage source, the load is placed in series with the voltage source.
  4. In the Label field, add a unique label for the impedance load.
  5. Click the Create button to create the load and to close the dialog.