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Coaxial or Coax Cable is used as a
transmission line for radio
frequency signals, in applications
such as connecting radio
transmitters and receivers with
their antennas, computer network
(Internet) connections, and
distributing cable television
signals.
Just
one advantage of coax over other types of
transmission line is that in an ideal coaxial
cable the electromagnetic field carrying the
signal exists only in the space between the
inner and outer conductors. This allows coaxial
cable runs to be installed next to metal objects
such as gutters without the power losses that
occur in other transmission lines, and provides
protection of the signal from external
electromagnetic interference.
Coaxial
cable differs from other shielded
cable used for carrying lower
frequency signals such as audio
signals, in that the dimensions of
the cable are controlled to produce
a repeatable and predictable
conductor spacing needed to function
efficiently as a radio frequency
transmission line. |
