This calculator worksheet allows one to examine the relationships of antenna system parameters and
their impact on antenna system operation. If one runs a sufficient number of example calculations,
it becomes clear that any combination of transmission line loss and SWR, Return Loss, or forward and
reflected (FWD/Ref'D) power which causes the percent of power reflected at the load to approach 100%
can make the system marginal, or worse. Use the figure below for reference:
NOTE1: All selections MUST be
made, and applicable entries completed, before the calculator will work. Additionally,
"Reset/Clear" action between caluclations is not absolutely necessary for all cases, but every so
often the javascript "hangs" after a calculation; if your results are not as expected, use the
Clear/Reset function and start over.
NOTE2: The forward and reflected powers in the "results"
will always be in Watts but, in parenthesis, these powers will also be in the units selected. For
calculations based on SWR and Return Loss, reflected power will be in the units selected for entered
forward power. When calculations are based on entered forward and reflected power, units will be those
entered for each.
