Electronic countermeasures

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As an example, modern stealth aircraft are made of materials that absorb the electromagnetic waves emitted by RADAR systems, reducing the amount of energy they reflect.  Furthermore, the fuselage of a stealth aircraft is carefully shaped to keep whatever energy it does reflect from bouncing directly back toward its source.  With its own RADAR system turned off, a stealth aircraft can have RADAR profile smaller than that of a bird.
 
As an example, modern stealth aircraft are made of materials that absorb the electromagnetic waves emitted by RADAR systems, reducing the amount of energy they reflect.  Furthermore, the fuselage of a stealth aircraft is carefully shaped to keep whatever energy it does reflect from bouncing directly back toward its source.  With its own RADAR system turned off, a stealth aircraft can have RADAR profile smaller than that of a bird.
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==Jamming==
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Jamming is is an effort to blind enemy sensors with an overload of signal.  If successful, the effect of jamming on a sensor system is much like looking at a very bright light with your unprotected eyes: you know there's a light source, but you may not be able to identify it because of the glare, and you may not be able to see other objects near the light source.  Similarly, loud music from a stereo would be easy to hear, but the loud noise could easily drown out the sound of several people sneaking around the area.
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A source of electronic jamming doesn't conceal its own existence, but it can disguise itself and potentially hide numerous other objects behind the glare of signal it produces.
  
 
== In ''Star Wars'' ==
 
== In ''Star Wars'' ==

Revision as of 22:13, 7 January 2009

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