3dB
can anyone tell as to why the bandwidth is always calculated as 3dB bandwidth(half power) and not any other number.?
Replies
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xheavenlyx-3dB is the half power point. How is it half. Excellent question! I had to look it up but here is the best explanation:
We get to the -3dB point when the voltage drops by 1/sqroot(2) and the power drops to -3dB.
Why half? Well, it's just the standard, you can define by -1.5dB too, but 1/sqroot(2) is a better number to stick to.
I still am not clear myself. If I get more information I will post it. -
tusharatdcethanks. Actually my question was this only as why is this standard half power only..?
why not three fourth or 90% or more or even less than half..? -
xheavenlyxYea, I could not get a clear answer to that, someone asked the same q in another forum. One guy replied: "Why not half-power?" 😀
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tusharatdce😀
do tell us if you find the answer.
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