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  2. Whip antenna - Wikipedia

    en.wikipedia.org/wiki/Whip_antenna

    Whip antennas for portable radios are often made of a series of interlocking telescoping metal tubes, so they can be retracted when not in use. Longer whips, made for mounting on vehicles and structures, are made of a flexible fiberglass rod around a wire core and can be up to 11 m (35 feet) long. The length of a whip antenna is determined by ...

  3. 15-meter band - Wikipedia

    en.wikipedia.org/wiki/15-meter_band

    The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz. The band is suitable for amateur long-distance communications , and such use is permitted in nearly all countries.

  4. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Not to be confused with the similar shaped, but much larger axial mode helix , nor to be confused with loop-type antennas. [o] Ground plane A whip antenna with several rods extending horizontally from base of the whip in a star-shaped pattern, similar to an upside-down radiate crown, that form the artificial, elevated ground plane that gives ...

  5. Rubber ducky antenna - Wikipedia

    en.wikipedia.org/wiki/Rubber_ducky_antenna

    The rubber ducky antenna (or rubber duck aerial) is an electrically short monopole antenna, invented by Richard B. Johnson, that functions somewhat like a base-loaded whip antenna. It consists of a springy wire in the shape of a narrow helix , sealed in a rubber or plastic jacket to protect the antenna. [ 1 ]

  6. Citizens band radio - Wikipedia

    en.wikipedia.org/wiki/Citizens_band_radio

    Over the next several years antenna regulations were relaxed, with antenna length increasing to 1.65 meters (5'5") and centre- or top-loading of the main radiating element permitted. On 1 September 1987 the UK added the usual 40 frequencies (26.965–27.405 MHz) used worldwide, for a total of 80 channels at 27 MHz; antenna regulations were ...

  7. Omnidirectional antenna - Wikipedia

    en.wikipedia.org/wiki/Omnidirectional_antenna

    Omnidirectional antennas are widely used for radio broadcasting antennas, [3] and in mobile devices that use radio such as cell phones, FM radios, walkie-talkies, wireless computer networks, cordless phones, GPS, as well as for base stations that communicate with mobile radios, such as police and taxi dispatchers and aircraft communications.

  8. AN/PRC-152 - Wikipedia

    en.wikipedia.org/wiki/AN/PRC-152

    The AN/PRC-152 Multiband Handheld Radio, is a portable, compact, tactical software-defined combat-net radio manufactured by Harris Corporation. [1] It is compliant without waivers to the Joint Tactical Radio System (JTRS) Software Communications Architecture (SCA).

  9. Inverted vee antenna - Wikipedia

    en.wikipedia.org/wiki/Inverted_vee_antenna

    An inverted vee antenna is a type of antenna similar to a horizontal dipole, but with the two sides bent down towards the ground, typically creating a 120- or 90-degree angle between the dipole legs. It is typically used in areas of limited space as it can significantly reduce the ground foot print of the antenna without significantly impacting ...

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