Antennas

End-Fed Half Wave Antenna (1)

  • As discussed, a half wavelength antenna has high voltage and low current at its ends, i.e., the ends are high impedance feed points
  • A parallel-tuned matching network comprising a coil and variable capacitor suitable for the frequency is used to resonate the system and the feeder is tapped to the point on the coil that gives the lowest SWR
  • A good ground (earth) for one end of the matching network and the braid of the coax is required