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| View Original: | Phased array animation with arrow 10frames 371x400px 100ms.gif (371x400) | |||
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| Keywords: Phased array animation with arrow 10frames 371x400px 100ms.gif phased array antenna works A phased array is a computer-controlled antenna which produces a beam of radio waves that can be steered electronically to point in different directions without turning the antenna They are widely used in military radar The phased array consists of an array of multiple identical antenna elements A driven by a transmitter TX The feed current for each antenna passes through a device called a phase shifter φ which is controlled by a computer control system C The moving red lines show the wavefronts surfaces of constant phase of the radio waves emitted by each antenna The waves of the individual antennas are spherical but they combine superpose in front of the antenna to make a plane wave a beam of radio waves traveling in a specific direction By progressively delaying the phase of each antenna going up the line the phase shifters cause the beam of radio waves to be emitted at an angle to the plane of the antennas By changing the phase shifts the computer control system can instantly steer the beam to any direction over a wide angle in front of the antenna Th velocity of the radio waves is shown slowed down enormously 2016-12-11 own Chetvorno other versions cc-zero Phased array diagrams Animated GIF files | ||||
