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Output Return Loss - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


SDO
Post subject: Output return loss Posted: Tue Sep 30, 2008 5:29 am

Captain


Joined: Tue Aug 26, 2008 5:18 am
Posts: 22
Location: UK
Hi,
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.
Thanks.


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IR
Post subject: Posted: Thu Oct 02, 2008 3:27 pm

Site Admin


Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany
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).






Posted  11/12/2012

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