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سؤال 360

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

  1. 1:1
  2. 5:1پاسخ درست
  3. Between 1:1 and 5:1 depending on the characteristic impedance of the line
  4. Between 1:1 and 5:1 depending on the reflected power at the transmitter

توضیح

The mismatch that causes the reflection is at the antenna end, and a matching network at the transmitter end does not change it. The network changes only what the transmitter sees; the line between it and the antenna still carries a 5:1 standing wave.

ادامهٔ این آزمون

شروع تمرین
سؤال 360: If the SWR on an antenna feed line is 5:1, and a matching… · FCC General Class (Element 3) · Questena