pgib8
Member level 2
Hi.
I'm comparing two low-noise-amplifiers and I'm looking at Input Return Loss.
One says its 14dB. The other one says it's -8dB.
I do know that higher values are better. Lower values means more signal is reflected back.
Am I completely off-track if I think that 0dB means that 100% of the signal is reflected back?
3dB means 50% signal is reflected, 6dB means 25% reflected, and so forth.
So what's up with the negative number then? Does it reflect 100% of the signal and then add some more signal of its own to send back to the antenna? I know I'm wrong about this but can somebody explain this to me?
I'm comparing two low-noise-amplifiers and I'm looking at Input Return Loss.
One says its 14dB. The other one says it's -8dB.
I do know that higher values are better. Lower values means more signal is reflected back.
Am I completely off-track if I think that 0dB means that 100% of the signal is reflected back?
3dB means 50% signal is reflected, 6dB means 25% reflected, and so forth.
So what's up with the negative number then? Does it reflect 100% of the signal and then add some more signal of its own to send back to the antenna? I know I'm wrong about this but can somebody explain this to me?