feed line length

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feed line length

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Antennas : 6M : 6 meter J-Pole Antenna

  • The Ugly MacGyver 6 meter J-pole Antenna - Essentially, a J-pole is a 1/2 wave resonant antenna connected to a quarter wave matching stub. The feedline is connected at a point on the matching stub that is at the feedline's characteristic impedance. The result is 3/4 of a wavelength on one side and 1/4 wavelength on the other side.
    [ Hits: 78 | Votes: 0 | Rating: 0 ]
Antennas : Array Antennas : J-Pole
  • Super J-Pole for 435MHz - The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf
    [ Hits: 3285 | Votes: 6 | Rating: 5 ]
Antennas : Theory : Impedance matching
  • Matching with one-twelfth-wavelength feed line - Matching with a half wave or wuarter wave coaxial cable is pretty well known, but an existing 1961 system to do that with two one-twelfth-wavelength transmission lines.
    [ Hits: 494 | Votes: 1 | Rating: 10 ]
Antennas : Windom
  • Windom Antenna with 4:1 balun - The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .
    [ Hits: 7854 | Votes: 6 | Rating: 6.67 ]
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