Start here: Reflection coefficient is the complex ratio of reflected-wave voltage to incident-wave voltage at a stated reference plane.
Why it matters
Its magnitude runs from zero for an ideal match toward one for total reflection; its phase shows where the impedance lies around the Smith chart.
A practical example
Two loads can have the same SWR but different reflection phase and therefore different impedances.
Use it well
Keep the complex value, reference impedance, frequency, and calibration plane attached to the result.
Operating boundary
Keep the measurement reference plane, current program rules, land access, spectrum authorization, and exact packed configuration with the decision. A connector, meter reading, or program name alone does not establish readiness.
