In plain language: Return loss expresses reflected power on a logarithmic scale: a larger positive return-loss value means a smaller reflection at the stated reference plane.
Why an operator notices it
Return loss and SWR describe the same mismatch from different angles, but neither says how efficiently the antenna radiates or how much power the feed line loses.
Decisions that matter
- State frequency and reference impedance.
- State the measurement plane.
- Use calibrated equipment and include fixture effects.
A useful field check
- Inspect the load and cable before measuring.
- Save the trace rather than one favorable point.
- Compare only measurements made with equivalent setups.
Common wrong turns
- Reading “more loss” as worse in the phrase return loss.
- Equating good return loss with gain.
- Ignoring feed-line attenuation that can hide reflection.
Technical foundation
This lesson translates established transmission-line and antenna practice into a field decision. Use the current equipment datasheet and Chameleon product guide for changing loss, power, connector, installation, and compatibility limits.
