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  2. Yagi–Uda antenna - Wikipedia

    en.wikipedia.org/wiki/YagiUda_antenna

    A portable YagiUda antenna for use at 144 MHz (2 m), with segments of yellow tape-measure ribbon for the arms of the driven and parasitic elements. Consider a YagiUda consisting of a reflector, driven element, and a single director as shown here.

  3. Driven and parasitic elements - Wikipedia

    en.wikipedia.org/wiki/Driven_and_parasitic_elements

    The parasitic elements in a Yagi antenna are mounted parallel to the driven element, with all the elements usually in a line perpendicular to the direction of radiation of the antenna. What effect a parasitic element has on the radiation pattern depends both on its separation from the next element, and on its length.

  4. Quad antenna - Wikipedia

    en.wikipedia.org/wiki/Quad_antenna

    A quad antenna is a type of directional wire radio antenna used on the HF and VHF bands. A quad is a YagiUda antenna ("Yagi") made from loop elements instead of dipoles: It consists of a driven element and one or more parasitic elements; however in a quad, each of the loop elements may be square, round

  5. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Also called a Moxon rectangle; it is a rectangular-shaped, folded version of a two-element Yagi-Uda, hence a minimal parasitic array. [14] Quad Although "quad" can refer to a single quadrilateral-shaped loop, the term usually refers to two or more loops stacked side by side as a parasitic array; at first glance, quads resemble a box kite frame.

  6. Log-periodic antenna - Wikipedia

    en.wikipedia.org/wiki/Log-periodic_antenna

    Electrically, it simulates a series of two- or three-element YagiUda antennas connected together, each set tuned to a different frequency. LPDA antennas look somewhat similar to Yagi antennas, in that they both consist of dipole rod elements mounted in a line along a support boom, but they work in very different ways.

  7. Television antenna - Wikipedia

    en.wikipedia.org/wiki/Television_antenna

    Outdoor antenna designs are often based on the YagiUda antenna [16] or log-periodic dipole array (LPDA). [17] These are composed of multiple half-wave dipole elements, consisting of metal rods approximately half of the wavelength of the television signal, mounted in a line on a support boom.

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