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  2. Monopole antenna - Wikipedia

    en.wikipedia.org/wiki/Monopole_antenna

    The monopole antenna was invented in 1895 and patented in 1896 [7] by radio pioneer Guglielmo Marconi during his historic first experiments in radio communication. He began by using dipole antennas invented by Heinrich Hertz consisting of two identical horizontal wires ending in metal plates.

  3. Antenna (radio) - Wikipedia

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

    The vertical antenna is a monopole antenna, not balanced with respect to ground. The ground (or any large conductive surface) plays the role of the second conductor of a monopole. Since monopole antennas rely on a conductive surface, they may be mounted with a ground plane to approximate the effect of being mounted on the Earth's surface.

  4. Whip antenna - Wikipedia

    en.wikipedia.org/wiki/Whip_antenna

    A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. A whip antenna is a form of monopole antenna. The antenna is designed to be flexible so that it does not break easily, and the name is derived from the whip-like motion that it exhibits when ...

  5. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    It is shaped like the Greek letter Π or an upside-down capital letter U, and is the loop antenna analog of a ground-mounted monopole antenna. Similar to how a vertical monopole uses its ground system to produce a "phantom" image of the rest of a dipole, the missing lower half of the half-loop is replaced by its ground-plane image. If shaped ...

  6. Dipole antenna - Wikipedia

    en.wikipedia.org/wiki/Dipole_antenna

    A ⁠ 1 / 4 ⁠ λ monopole antenna and its ground image together form a ⁠ 1 / 2 ⁠ λ dipole that radiates only in the upper half of space. The vertical, Marconi, or monopole antenna is a single-element antenna usually fed at the bottom (with the shield side of its unbalanced transmission line connected to ground). It behaves essentially ...

  7. Spark-gap transmitter - Wikipedia

    en.wikipedia.org/wiki/Spark-gap_transmitter

    [61] [62] [17]: p.352-353, 355–358 [36]: p. 125-136, 254–255, 259 [63] A grounded capacitance-loaded spark-excited resonant transformer (his Tesla coil) attached to an elevated wire monopole antenna transmitted radio waves, which were received across the room by a similar wire antenna attached to a receiver consisting of a second grounded ...

  8. T-antenna - Wikipedia

    en.wikipedia.org/wiki/T-antenna

    The name comes from its resemblance to an inverted letter "L" (Γ). The T-antenna is an omnidirectional antenna, radiating equal radio power in all azimuthal directions, while the inverted-L is a weakly directional antenna, with maximum radio power radiated in the direction of the top load wire, off the end with the feeder attached.

  9. Discone antenna - Wikipedia

    en.wikipedia.org/wiki/Discone_antenna

    A discone antenna is a monopole version of a biconical antenna, in which one of the cones is replaced by a disc. It is usually mounted vertically, with the disc at the top and the cone beneath. It is usually mounted vertically, with the disc at the top and the cone beneath.