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→What is SWR?
=== What is SWR? ===
=== What is SWR? ===
SWR (''Standing Wave Radio'') measure the performance of signal emitting in the atmosphere.
SWR (''Standing Wave Radio'') measure the performance of signal emitted in the atmosphere.
On a radio board, the signal is generated by the transceiver, flowing into the antenna cable and finally through the antenna to be emitted into the atmosphere.
Depending on the antenna, there is some rejection of the signal back to the transceiver. This means than a portion of the signal is not emitted to the air! This is why the SWR measurement is done.
A poor antenna design will have greater SWR (>2) meaning that range of transmission (or reception) will be reduced! Very bad SWR may even dammage the transceiver!