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: 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).