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  2. J-pole antenna - Wikipedia

    en.wikipedia.org/wiki/J-pole_antenna

    The J-pole antenna is an end-fed omnidirectional half-wave antenna that is matched to the feedline by a shorted quarter-wave parallel transmission line stub. [5] [1] [6] For a transmitting antenna to operate efficiently, absorbing all the power provided by its feedline, the antenna must be impedance matched to the line; it must have a resistance equal to the feedline's characteristic impedance.

  3. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Antennas can be classified in various ways, and various writers organize the different aspects of antennas with different priorities, depending on whether their text is most focused on specific frequency bands; or antenna size, construction, and placement feasibility; or explicating principles of radio theory and engineering that underlie ...

  4. File:J-pole antenna diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:J-pole_antenna...

    English: Diagram of a J-pole antenna, a vertical end-fed half-wave omnidirectional transmitting antenna used in the shortwave frequency bands. It consists of a vertical element a half wavelength (/) long, fed in series with a quarter wavelength (/) transmission line stub, with the coaxial cable feedline (F) from the transmitter attached along the stub.

  5. Talk:J-pole antenna - Wikipedia

    en.wikipedia.org/wiki/Talk:J-pole_antenna

    The J Pole or Zepp Antenna is a voltage fed antenna that was invented by the Germans (citation needed). It was first used on the Zepplin Ballon Air Ships (citation needed) hence the name Zepp Antenna.

  6. File:J-pole antenna showing standing waves 1.svg - Wikipedia

    en.wikipedia.org/wiki/File:J-pole_antenna...

    English: Diagram of a J-pole antenna, a vertical end-fed half-wave omnidirectional transmitting antenna used in the shortwave frequency bands. The diagram shows the standing waves of voltage (V, red bands) and current (I, blue bands) on the antenna elements.

  7. From NEPA to the North Pole: Ham radio lets kids talk to Santa

    www.aol.com/nepa-north-pole-ham-radio-010100465.html

    Through Dec. 24, children can talk to Santa — all they need is access to amateur radio equipment. Children, also known as “little harmonics” in amateur radio lingo, can call “the North ...

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