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electromagnetic field
(redirected from EM field)

    Also found in: Medical, Wikipedia, Hutchinson 0.02 sec.

electromagnetic field

Property of space caused by the motion of an electric charge. A stationary charge produces an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. A changing magnetic field also produces an electric field. The interaction of electric and magnetic fields produces an electromagnetic field, which has its own existence in space apart from the charges involved. An electromagnetic field can sometimes be described as a wave that transports electromagnetic radiation.

electromagnetic field [i¦lek·trō·mag′ned·ik ′fēld]
(electromagnetism)
An electric or magnetic field, or a combination of the two, as in an electromagnetic wave.
Electromagnetic field

A changing magnetic field always produces an electric field, and conversely, a changing electric field always produces a magnetic field. This interaction of electric and magnetic forces gives rise to a condition in space known as an electromagnetic field. The characteristics of an electromagnetic field are expressed mathematically by Maxwell's equation. See Electric field, Electromagnetic radiation, Electromagnetic wave



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? Mentioned in ? References in periodicals archive
 
In the case of a microstrip transmission line, the EM field exists both in the air above and the dielectric substrate below the microstrip line.
Virtual RF: PCB prototypes: gone are the days when designers had to ... by Morris, David / Printed Circuit Design & Manufacture
The E/HH and HDM of the birds subjected to EM fields were compared to respective commercial standards that represent a reasonable genetic potential under optimal conditions [referred to as 'Breeder Goals' (BG)].
Agriculture and Plant Science by Journal of the Mississippi Academy of Sciences
Vector Fields' Concerto software is used by designers worldwide for fast and accurate computation of EM fields and is especially suited to RF and microwave design," said James Spoto, AWR president and CEO.
AWR and Vector Fields Partner to Integrate Concerto EM Modeling ... by Business Wire
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