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A key innovation in the SCR-270 was a transmit-receive (TR) switch. The SCR-268 searchlight control radar, which shared much technology with the SCR-270, used separate antennas for transmit and receive, For maximum antenna gain at a given size it is desirable to use the same antenna for both functions. One obstacle is the need to protect the ...
NEC-4 modified NEC-3 to better model very small antennas, like those on cell phones and WiFi routers. The most recent version, 4.2, includes a better version of the Sommerfeld model used in NEC-3 for in- and near-ground wires, added current sources instead of just voltage sources as in earlier models, and used a new memory management system ...
The Antenna Interface Standards Group (commonly referred to as AISG) is a non-profit international consortium formed by collaboration between communication infrastructure manufacturers and network operators with the purpose of maintaining and developing a standard for digital remote control and monitoring of antenna line devices in the wireless industry. [1]
An antenna rotator (or antenna rotor) is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed near the equipment which the antenna is connected to, while the rotator is mounted on the antenna ...
An antenna control unit utilizes the resulting difference signal to select the optimum signal strength for the particular step of the search pattern. This system is particularly applicable to extremely high frequency communication channels (86 GHz and above) which are subject to atmospheric distortion and noise .
A UGV is a vehicle kit system that advances perception, localization and motion planning to protect from IED threats and increase performance in autonomous missions. [27] They typically are adaptable to any tactical wheeled vehicle for the purpose of supervised autonomous navigation in either a lead or follow role. UGVs are multi-sensor systems ...
SPY-1E SBAR (S-Band Active Array) is the only active electronically scanned array (AESA) model in the SPY-1 series. SPY-1E utilizes commercial off-the-shelf (COTS) subsystems, and a single-faced demonstration unit was built in 2004. The weight of the antenna remains the same, but the weight below the deck is greatly reduced.
Oscilloscope OL-1 from 1954, the company's first with a relatively small 3-inch CRT which allowed for a highly competitive price of US$ 29.50 (equivalent to $335 in 2023) for the DIY kit. [1] Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company.