--- "Buley, Kenneth L (GE Consumer & Industrial)"
<[EMAIL PROTECTED]> wrote:
> Gee, when did unity become equal to -0- ???
>
> (Unity Gain - A gain of one. That is, the signal is
> output from a circuit at the same level at which it
> entered.)
> From ;
>
http://www.yamaha.co.jp/product/proaudio/homeenglish/faq/glossaries/glossarie/
>
> Therefore, a gain of less than unity is still
> greater than -0-.
> My question is, can there be a gain of -0- ???
>
> Kenneth Buley
> Bullitt County ARES/RACES Coordinator KE4AWY
> Bullitt County EMA CD-2
> Bullitt County Red Cross Disaster Communications
> BC-6
>
>
>
>
> -----Original Message-----
> From: russ [mailto:[EMAIL PROTECTED]
> Sent: Friday, July 23, 2004 9:09 AM
> To: [email protected]
> Subject: Re: [Repeater-Builder] Omnidirectional
> antenna into 2m band
>
>
> <snip>
> they are less the unity.
> Gee less then -0-
> <snip some more>
>
Unity gain is a gain of one, or 0 dB. When referring
to antenna gain, most people would reference it to " X
dB over a dipole/quarter wave/isotropic/rubber
duckie/wet noodle/dummy load/whatever.
So, when someone says it has "zero" gain (no gain in
dB), it must be the same as the reference (whatever
that is). If it has less than zero (dB) gain, then the
antenna would show a "loss" as opposed to the
reference antenna. A good example would be a 2M rubber
duck compared to a dipole. Here we see that the duck
exhibits "less than zero gain" or in other words, a
loss.
It's confusing because people don't always put the
"dB" after it. Sometimes we're as bad as the antenna
manufacturers. :)
Joe
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