rotating antenna การใช้

• The heart of the TAFLIR system is the rotating antenna mounted on a truck.
• The Seaspray Mk . 3 had a rotating antenna with a 360?field of view.
• Designated " CD ", it used a large, rotating antenna atop a 70-foot wooden tower.
• The rough direction can be calculated using a rotating antenna, or similar passive array using amplitude comparison.
• Weather radar shows where and how much precipitation is falling by emitting microwaves from a rotating antenna.
• A " scan " is a single search of the entire sky made by the rotating antenna.
• In 1972, near the rotating antenna, a shortwave curtain antenna was built and further transmitters went into service.
• Some systems used in the United States modulate the transmitted signal by using a 900 RPM rotating antenna.
• It is next to a fenced area that has a building and a tower with a rotating antenna.
• In this, the power could be switched to a smaller, rotating antenna that gave a narrow vertical beam.
• Or will a rotating antenna be necessary, with the signal received depending on how the antenna is aimed?
• Early systems used mechanically rotated antennas that compared signal strengths, and several electronic versions of the same concept followed.
• The E-3 is a modified Boeing 707 commercial jetliner characterized by the strikingly large thirty-foot rotating antenna mounted on its roof.
• During the Second World War, RAF Ingoldmells was a Chain Home Low radar station, providing low-altitude short-range warning, with a rotating antenna.
• Early systems used mechanically rotated antennas that compared signal strengths in different directions, and several electronic versions of the same concept followed.
• During the era between World War I and World War II, a number of systems were introduced that placed the rotating antenna on the ground.
• As on other ships employing the Aegis system, the superstructure is dominated by the SPY-1's phased arrays, which eliminates the need for a traditional rotating antenna.
• "Enterprise " also had a phased array radar system known as SCANFAR . SCANFAR was intended to be better at tracking multiple airborne targets than conventional rotating antenna radars.
• This system essentially reversed the RDF concept, placing the rotating antenna on the ground instead of the vehicle, spinning it slowly at 1 rpm ( 6 degrees a second ).
• Though this technique is usually more accurate than others, it may require special hardware in order to be deployed, such as an array of six to eight antennas or rotating antennas.