can the unbalanced Pi attenuator take the place of isolator - RF Cafe Forums

RF Cafe Forums closed its virtual doors in late 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2012, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts. Here is the full original RF Cafe Forums on Archive.org

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

cools

Post subject: can the unbalanced Pi attenuator take the place of isolator Posted: Sun Jul 17, 2005 10:05 pm

can the unbalanced Pi attenuator take the place of isolator? if do ,how about the performance?

Top

Guest

Post subject: Pad substituting for isolatorPosted: Mon Jul 18, 2005 6:55 pm

While a 30 dB pad would give 30 dB of isolation, I'm hard-pressed to come up with a situation where that would make sense.

In a receiver, that would give a 30 dB noise figure: terrible!

In a transmitter, that would reduce the power output 30 dB: what a waste!

What is the context for this question?

Good Luck!

Posted  11/12/2012