Hello, everyone. The starting point for a discussion of Q for an
antenna or an individual component or network of components should be
the definition of Q and that is the ratio of energy stored to the
energy dissipated per cycle. In the case of an antenna the energy
"dissipated" consists of that dissipated as heat in the antenna
structure and radiated into the medium. The stored energy is that
contained in the reactive near field of the antenna. If matching
networks containing RLC components are considered as part of the
antenna they would have to be factored in.
Any derivative calculations involving other quantities such as
impedance and bandwidth must adhere (or be a good approximation to)
the above definition for antenna Q to be meaningful. Sincerely,
--
__ __ ______ __ John Wood
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MACHINES SHOULD WORK, PEOPLE SHOULD THINK. - IBM
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Received on Tue Dec 31 2002 - 17:16:13 EST
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