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  2. Moxon antenna - Wikipedia

    en.wikipedia.org/wiki/Moxon_antenna

    Moxon antenna for the 20-meter band.The antenna is the faint rectangle of wires held in tension by the bent X-shaped support frame. Moxon antenna for the 2-meter band. The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. [1]

  3. File:Antenna schematic symbol.svg - Wikipedia

    en.wikipedia.org/wiki/File:Antenna_schematic...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  4. Reconfigurable antenna - Wikipedia

    en.wikipedia.org/wiki/Reconfigurable_antenna

    A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. [2] In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism (such as RF switches, varactors, mechanical actuators or tunable materials) that enable the intentional redistribution of the RF currents over the ...

  5. Antenna measurement - Wikipedia

    en.wikipedia.org/wiki/Antenna_measurement

    Antenna directivity is the ratio of maximum radiation intensity (power per unit surface) radiated by the antenna in the maximum direction divided by the intensity radiated by a hypothetical isotropic antenna radiating the same total power as that antenna. For example, a hypothetical antenna which had a radiated pattern of a hemisphere (1/2 ...

  6. 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.

  7. Biconical antenna - Wikipedia

    en.wikipedia.org/wiki/Biconical_antenna

    A truncated biconical antenna showing the typical "mace head" shape. In radio systems, a biconical antenna is a broad-bandwidth antenna made of two roughly conical conductive objects, nearly touching at their points. [1] Biconical antennas are broadband dipole antennas, typically exhibiting a bandwidth of three octaves or more.

  8. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    Use the Sign-in Helper to locate your username and regain access to your account by entering your recovery mobile number or alternate email address.; To manage and recover your account if you forget your password or username, make sure you have access to the recovery phone number or alternate email address you've added to your AOL account.

  9. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    An ATC ground station consists of two radar systems and their associated support components. The most prominent component is the PSR. It is also referred to as skin paint radar because it shows not synthetic or alpha-numeric target symbols, but bright (or colored) blips or areas on the radar screen produced by the RF energy reflections from the target's "skin."

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