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  2. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    The category of simple antennas consists of dipoles, monopoles, and loop antennas. Nearly all can be made with a single segment of wire (ignoring the break made in the wire for the feedline connection). [citation needed] Dipoles and monopoles called linear antennas (or straight wire antennas) since their radiating parts lie along a single ...

  3. List of International Space Station spacewalks - Wikipedia

    en.wikipedia.org/wiki/List_of_International...

    Installed a second camera system, released more radiator launch locks, removed insulation covers on quick-disconnect fittings near the Z1 and P6 junction and to install Spool Positioning Devices, released starboard-side launch restraints on the CETA cart, and attached Ammonia Tank Assembly cables. [52] [54] 46. STS-112 EVA 3: David A. Wolf ...

  4. Tactical Vest Antenna System - Wikipedia

    en.wikipedia.org/wiki/Tactical_vest_antenna_system

    The Tactical Vest Antenna System is designed to be concealed within Small Arms Protective Insert pouches found on contemporary body armor such as Interceptor body armor, Modular Tactical Vest, Full Spectrum Battle Equipment, Combat Integrated Releasable Armor System, Modular Body Armor Vest and virtually any other type of body armor that utilizes SAPI or ESAPI plates.

  5. Fresnel zone antenna - Wikipedia

    en.wikipedia.org/wiki/Fresnel_zone_antenna

    Until the 1980s, the Fresnel zone plate antenna was regarded as a poor candidate for microwave applications. Following the development of DBS services in the eighties, however, antenna engineers began to consider the use of Fresnel zone plates as candidate antennas for DBS reception, where antenna cost is an important factor. This, to some ...

  6. Ocean Guardian - Wikipedia

    en.wikipedia.org/wiki/Ocean_Guardian

    Ocean Guardian is the manufacturer of Shark Shield shark repellent devices. The Ocean Guardian electronic devices create an electromagnetic field to deter shark attacks and are used by surfers , scuba divers , snorkelers , spearfishers , ocean kayak fishers , swimming areas off boats and for ocean fishing.

  7. Short backfire antenna - Wikipedia

    en.wikipedia.org/wiki/Short_backfire_antenna

    A short backfire antenna (or short back-fire, SBA, SBF or SBFA) is a type of a directional antenna, characterized by high gain, relatively small size, and narrow band. It has a shape of a disc with a straight edge, with a vertical pillar with a dipole acting as the driven element in roughly the middle and a conductive disc at the top acting as ...

  8. 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 ...

  9. Slot antenna - Wikipedia

    en.wikipedia.org/wiki/Slot_antenna

    Slotted array UHF television broadcasting antenna. As shown by H. G. Booker in 1946, from Babinet's principle in optics a slot in a metal plate or waveguide has the same radiation pattern as a driven rod antenna whose rod is the same shape as the slot, with the exception that the electric field and magnetic field directions are interchanged; the antenna is a magnetic dipole instead of an ...

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