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Frage 155

What is the purpose of an antenna tuner?

  1. Reduce the SWR in the feed line to the antenna
  2. Reduce the power dissipation in the feedline to the antenna
  3. Increase power transfer from the transmitter to the feed lineRichtige Antwort
  4. All these choices are correct

Erklärung

An antenna tuner is a matching network at the transmitter end that transforms whatever impedance the feed line presents into the impedance the transmitter is designed to drive, so the transmitter delivers full power instead of folding back. It does not change conditions on the far side of itself: the mismatch ratio on the line between tuner and antenna is unchanged, which is why the combined answer is wrong.

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Frage 155: What is the purpose of an antenna tuner? · FCC General Class (Element 3) · Questena