Output return loss - RF Cafe Forums
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Post subject: Output return loss Posted: Tue Sep 30, 2008 5:29 am
Joined: Tue Aug 26, 2008 5:18 am
I am designing a PA for 1.8-2.0GHz application. I am driving a balanced stage with a single ended stage. This is a class A amplifier.
My question is: what should be the minimum output return loss of driver stage (single ended) so that I do not loose power of driver amp to drive the PA balanced stage.
Post subject: Posted: Thu Oct 02, 2008 3:27 pm
Joined: Mon Jun 27, 2005 2:02 pm
The return loss should be ideally as low as possible.
A good starting point should be -10dB and lower. With RL=-10dB, that means that 10% of the power will be reflected back to the source (Single-ended stage output).