Calculates the absolute load impedance, reflection coefficient, VSWR, return loss and mismatch loss of a load. This circuit can be simulated in a FLEXI-BOX, and a transmission line (50 Ohm track) PCB is available which easily adapts for this circuit with one simple trimming operation. There is a selection of 50 Ohm RF connectors available and a 75 Ohm BNC or TNC will also fit directly onto the box with no modifications.
The absolute value of the load impedance is calculated from the complex impedance (R + j).
Where R is the Real part of the impedance
and j is the Imaginary part of the impedance
The Load Reflection Coefficient ( Γ ) is calculated using the complex impedance of the load and the characteristic impedance of the source.
Where Zo is the Source Impedance
The VSWR is then calculated using the Reflection Coefficient
The Reflection Coefficient is used again to calculate the Return Loss
The Reflection Coefficient is used yet again to calculate the Mismatch Loss
Various formulas for Voltage Reflection Coefficient and VSWR are also available at:-
This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX
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