GAL-ANA Help

 

Tools > Stub match

           This is a combination of two sections of line, a serial section and a stub section across the feedpoint. The stub section can be either shorted, an open stub, or have an L, or C across its end. The window has a five main parts:

• Main menu.
• Groupbox Source.
• Groupbox Matching section.
• Groupbox Load.
• Control panel.

 

• File - common commands.
  • Save - save results in the file.
  • Print - print results.
  • Exit - close and return to main Tools window.
• Service
  • Calculator – On-screen calculator.
  • Change unit – for measurements of length:
    • Meter – meters.
    • Millimetre – millimetres.
    • Feet – feet.
    • Feet-Imper – Imperial system: feet and inch.
    • Inch – inch.
  • Line edit – enables the listed lines to be edited.
• Help - help.

 

This area displays the parameters of the source.

• Rout – standard R.
• Frequency   – frequency.
• Power – power.
• VSWR – VSWR after matching section included.

 

The load (antenna) parameters are displayed in this area. Any antenna calculation performed in the main window will automatically update the R and jX values shown here.

• R – real part of the load impedance.
• JX – reactive part of the load impedance.
• Match loss – losses in the match unit. This window’s background colour changes if losses are high.
• Power – active power in the load.
• VSWR – VSWR of the load.
• Efficiency – – of the matching section. The Window’s background colour changes if the efficiency is low.

 

This is a combination of two sections of line, a serial section and a stub section across the feedpoint. The stub section can be either shorted, an open stub, or have an L, or C across its end.

Circuit the matching unit with calculated values

• Buttons L, C, Stub S, Stub O select parallel element. If L or C selected, then quality factor Q needs to be selected for the drop down menu.
• Type of line - drop down menu provides a selection of standard line impedances.
• Overlaid on the image are the calculated values of physical length and electrical values of L or C, and in the central area the values of:
  • VSWR - measured at the beginning of the line.
  • Zin - input impedance, measured at the beginning of the line (without parallel section).
  • Loss - line loss, dB.
• The right of the parallel elements are displayed:
  • L or Ρ - inductance or capacitance (if L or C).
  • Z - impedance (without serial stub).
  • S - complex (real + reactive) power.

 

• Tune – button starts calculation.
• Set as match – inserts calculated L or C series matching component into model of the antenna in the main window.
• Frequency plot – opens frequency plot window.

Edited by G8ODE