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  2. Tomark Viper SD4 - Wikipedia

    en.wikipedia.org/wiki/Tomark_Viper_SD4

    The Tomark Viper SD4 is a Slovak single–engine, all-metal, two-seat low wing monoplane with a fixed tricycle undercarriage and side-by-side seating for two people. The aircraft is built by Tomark s.r.o. of Prešov .

  3. Smart antenna - Wikipedia

    en.wikipedia.org/wiki/Smart_antenna

    Smart antennas (also known as adaptive array antennas, digital antenna arrays, multiple antennas and, recently, MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signatures such as the direction of arrival (DOA) of the signal, and use them to calculate beamforming vectors which are used to track and locate the antenna beam on the mobile/target.

  4. Viper Aircraft ViperJet - Wikipedia

    en.wikipedia.org/wiki/Viper_Aircraft_ViperJet

    The MKII prototype flew on 12 June 2005 and Viper Aircraft offered replacement MKII parts to all customers who had purchased kits of the original version, [7] now dubbed the MKI. In 2006, the base MKII kit cost US$182,000, but since builders can purchase additional components already pre-made by Viper Aircraft, customers spent an average of ...

  5. Tomark - Wikipedia

    en.wikipedia.org/wiki/Tomark

    The company's first design was the Tomark Viper SD4, a low-wing, two-seat aircraft that was first flown on 1 November 2006 and accepted by the American Federal Aviation Administration as an approved special light-sport aircraft in 2010. [1] [2] [5]

  6. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    An umbrella antenna consists of a central radiating tower with multiple wires attached at the top as a "capacitance hat", that extend out radially from the mast and are insulated at their ends; the overhead configuration resembles an open metal umbrella frame, hence the name "umbrella antenna". Like other ultra-short antennas it requires a ...

  7. Random wire antenna - Wikipedia

    en.wikipedia.org/wiki/Random_wire_antenna

    Often random wire antennas are also (inaccurately) referred to as long-wire antennas.There is no accepted minimum size, but actual long-wire antennas must be greater than at least a quarter-wavelength (⁠ 1 / 4 ⁠ λ) or perhaps greater than a half (⁠ 1 / 2 ⁠ λ) at the frequency the long wire antenna is used for, and even a half-wave may only be considered "long-ish" rather than "truly ...

  8. Television antenna - Wikipedia

    en.wikipedia.org/wiki/Television_antenna

    A short antenna pole next to a house Multiple Yagi TV aerials. Antennas are commonly placed on rooftops and sometimes in attics. Placing an antenna indoors significantly attenuates the level of the available signal. [19] [20] Directional antennas must be pointed at the transmitter they are receiving; in most cases great accuracy is not needed ...

  9. Kymeta - Wikipedia

    en.wikipedia.org/wiki/Kymeta

    Kymeta was founded in August 2012 after spinning out from Intellectual Ventures and manufactures software-enabled, meta-materials based electronic beamforming antennas and terminals for satellite communications. [2] Founder Nathan Kundtz served as the CEO until 2018. [3]

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