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File:Phased array animation with arrow 10frames 371x400px 100ms.gif

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Phased_array_animation_with_arrow_10frames_371x400px_100ms.gif (371 × 400 pixels, file size: 235 KB, MIME type: image/gif, looped, 10 frames, 1.0 s)

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Summary

Description
English: Animation showing how a 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.
Date
Source Own work
Author Chetvorno

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Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
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Animation showing how a phased array works

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11 December 2016

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Date/TimeThumbnailDimensionsUserComment
current05:28, 12 December 2016Thumbnail for version as of 05:28, 12 December 2016371 × 400 (235 KB)ChetvornoUser created page with UploadWizard

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