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Q help! - RF Cafe Forums
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spbhu
Post subject: Q help! Posted: Mon Aug 08, 2005 6:39 am
Lieutenant
Joined: Tue Aug 02, 2005 1:44 am
Posts: 3
Location: NTU
People always say a high-Q peaking inductor or low
high-Q peaking inductor? What does it mean? What does Q stand for, and
high Q better or low Q better?
Thanks
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IR
Post subject: Posted: Mon Aug 08, 2005 11:52 am
Site Admin
Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location:
Germany
Hello spbhu,
Q stands for Quality Factor. It defines
the ratio between the energy that is being lost on power dissipation
per cycle to the entire energy of the cycle. Another way to put it is:
Qul=Xl/R (Unloaded Quality Factor)
Where:
Xl - The
reactance of the inductor (2*pi*f*L)
R - The ohmic resistance of
the inductor's wire.
High Q is better since it means that there
is a lower resistive dissipation in the inductor. There are few ways
to achieve that like using air core or lower resistance materials for
the wire.
_________________
Best regards,
- IR
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Guest
Post subject: Posted: Mon Aug 08, 2005
11:53 am
Q (Quality factor) is the ratio of reactive power to resistive
power in a tuned circuit.
Posted
11/12/2012
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