Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: Q help! Posted: Mon Aug 08, 2005 6:39 am
Joined: Tue Aug 02, 2005 1:44 am
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?
Post subject: Posted: Mon Aug 08, 2005 11:52 am
Joined: Mon Jun 27, 2005 2:02 pm
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)
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.
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.