SWR — What It Means in Ham Radio

SWR — Standing Wave Ratio.

A measure of how well your antenna system matches your radio. A high SWR means power is bouncing back instead of radiating, and modern radios cut power to protect themselves when they see it.

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Related words

  • Solar flux — A number that tracks solar activity.
  • Wavelength — The physical length of one radio wave.
  • Band — A range of frequencies set aside for a purpose.
  • APRS — Automatic Packet Reporting System.
  • SSB — Single Sideband. HF voice.
  • SSTV — Slow-Scan Television.
  • K index — How disturbed the earth's magnetic field is.
  • CW — Continuous Wave. Morse code.