Feeders

Standing Waves (3)

  • High SWR on the feeder due to a difference in antenna and feeder impedance increases losses, particularly in the case of coaxial cable which may contribute to interference by radiation from the cable
  • A high SWR can cause a mismatch between the feeder input and transmitter output which will result in poor power transfer and high voltage or currents which may damage the transmitter output stage;  modern transmitters will not tolerate an SWR in excess of 3:1