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  2. Antenna (radio) - Wikipedia

    en.wikipedia.org/wiki/Antenna_(radio)

    Amateur radio antennas that operate at several frequency bands which are widely separated from each other may connect elements resonant at those different frequencies in parallel. Most of the transmitter's power will flow into the resonant element while the others present a high impedance.

  3. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    A full-wave two-element quad antenna used by an amateur radio station. Yagi–Uda television antenna for analog channels 2–4, 47–68 MHz.

  4. Hexbeam - Wikipedia

    en.wikipedia.org/wiki/Hexbeam

    Hexbeam amateur radio antenna. A hexbeam, or hexagonal-beam, is a type of a directional antenna for shortwave, most often used in amateur radio. The name comes from the hexagonal outer shape of the antenna. It may also sometimes be known as a W-antenna, referring to the shape of the driver. The design looks something like an upturned umbrella.

  5. Amateur radio - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio

    A young Polish woman with radio antennas in Åland Ham radio antenna farm in the backyard. The many facets of amateur radio attract practitioners with a wide range of interests. Many amateurs begin with a fascination with radio communication and then combine other personal interests to make pursuit of the hobby rewarding.

  6. Amateur radio frequency allocations - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_frequency...

    Amateur radio frequency allocation is done by national telecommunication authorities. ... With a large antenna system like a long yagi, and higher power ...

  7. Amateur radio repeater - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_repeater

    An amateur radio repeater system consisting of a 70 cm repeater and a 2-meter digipeater and iGate. Coaxial cavity RF filter at 2 meter repeater An amateur radio repeater is an electronic device that receives a weak or low-level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer ...

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