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The price for the extra working frequencies is the needed to match a feed impedance 5–7 times ... 80 ft high 'T' antenna for 1.5 ... (roughly double the size) ...
South Africa. Utility vehicle 435: Used for border patrol. R500 million will be spent in 2024/25 to replace these vehicles with new mine-resistant APCs. Gecko 8×8 ATV [60] South Africa Canada: All-terrain utility vehicle 100: Used by the Parachute Regiment and Special Forces. SAMIL 20 [61] [62] South Africa: 4×4 logistics truck Several thousands
Bonnie Crystal was granted the US patent 7,151,497 Coaxial Antenna System on December 19, 2006, after filing in 2003 for new types of coaxial antennas with reduced size providing efficient broadband, wideband and controlled bandwidths, using radiation by the outside of the coaxial elements.
The antenna's feed point is at the center of the disc. It is usually fed with 50-ohm coaxial cable, with the center conductor connected to the disc, and the outer conductor to the cone. The cone: The length of the cone should be a quarter wavelength of the antenna's lowest operating frequency. [2] The cone angle is generally from 25 to 40 degrees.
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.
The LRAC F1, officially called Lance-Roquettes AntiChar de 89 mm modèle F1 (89 mm anti-tank rocket launcher model F1), is a French reusable rocket launcher developed by Luchaire Défense SA, and manufactured in cooperation with Manufacture Nationale d'Armes de Saint-Étienne and was, in the 1970s, marketed by Hotchkiss-Brandt.
A Vivaldi antenna or Vivaldi aerial [1] or tapered slot antenna [2] is a co-planar broadband-antenna, which can be made from a solid piece of sheet metal, a printed circuit board, or from a dielectric plate metalized on one or both sides. Patterned Vivaldi antenna, made from double-sided printed circuit board material
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]