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Field strength
In
physics
,
field
strength
means the
magnitude
of a vector-valued field.
For example, an
electromagnetic field
results
in both
electric field strength
and
magnetic field strength
.
As an
application
, in
radio frequency
telecommunications
, the
signal strength
excites
a
receiving
antenna
and thereby induces a
voltage
at a
specific
frequency
and
polarization
in order to provide an
input
signal to a
radio receiver
.
Field
strength
meters
are used for such
applications
as
cellular
,
broadcasting
,
wi-fi
and a
wide
variety
of other radio-related applications.