15 lines
617 B
Plaintext
15 lines
617 B
Plaintext
= SWR =
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Standing Wave Radio (SWR) is a phenomenon where power sent down a feed line is
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reflected back by the antenna. Due to this, a standing wave is formed in the
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feed line.
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This only occours when the impedance of the antenna and the feed line do not
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match. This is often caused by having the incorrect sized antenna for the
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signal.
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SWR is the same as the ratio of antenna-to-feed or feedline-to-antenna
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impedances, whichever is greater than 1. No reflected power is a ratio of 1,
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and means that there is no interference pattern. Because [[Impedance]] changes with
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frequency, the SWR also changes with frequency.
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