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

From Wikipedia, the free encyclopedia

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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مب

Summary

Description
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

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

Captions

Animation showing how a phased array works

Items portrayed in this file

depicts

11 December 2016

image/gif

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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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Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.