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A common design for a counterpoise is a series of radial wires suspended a few feet above the ground, extending from the base of the antenna in all directions in a "star" pattern, connected at the center. [2] The counterpoise functions as one plate of a large capacitor, with the conductive layers in the earth as the other plate. [2]
The US Army has used the ATAS variant on its OH-58D Kiowa Warrior and UH-60 Black Hawk helicopters in the air-to-air role.. In a 19 November 1996 demonstration, a Stinger (ATAS) Block-1 missile was launched from an OH-58D at the Yuma Proving Ground and successfully destroyed a QUH-1 drone helicopter deploying countermeasures at a range greater than 2.8 miles (4,500 m).
The FT-1000MP is an amateur radio ("ham") transceiver series, built by Yaesu.It is an "all-mode" set, operating in the high frequency (HF) frequency range. The "MP" suffix in the name was an homage to Sako Hasegawa, the late founder of the company whose callsign was JA1MP, and who heavily influenced the design and feature set built into this radio.
The FT-817 is based on a similar circuit architecture as Yaesu's FT-857 and FT-897, so it is a compromise transceiver and incorporates its features to its low price ...
Yaesu is a Japanese brand of amateur radio equipment, founded as Yaesu Musen Co., Ltd. (八重洲無線株式会社, Yaesu Musen Kabushiki-gaisha) in 1959 by a Japanese radio amateur Sako Hasegawa (call sign JA1MP [1]) in Yaesu, Japan, a district of Tokyo.
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 ...
In telecommunications and radar engineering, the antenna boresight is the axis of maximum gain (maximum radiated power) of a directional antenna.For most antennas the boresight is the axis of symmetry of the antenna.
Eventually, the ASRAAM was developed solely by the British, but using another source for its infrared seeker. After protracted development, the deployment of AMRAAM (AIM-120A) began in September 1991 in US Air Force McDonnell Douglas F-15 Eagle fighter squadrons. The US Navy soon followed (in 1993) in its McDonnell Douglas F/A-18 Hornet squadrons.