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Input return loss circunference on the smith chart - RF Cafe Forums

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 Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Input return loss circunference on the smith chart
Posted: Fri Jan 21, 2011 2:35 pm 
 
Lieutenant

Joined: Fri Jan 21, 2011 11:39 am
Posts: 1
Hi!!! =)

Im designing a CMOS low noise amplifier and would like to generate the input return loss circles of the amplifier for different values. For example -10 dB, -15 dB and -20 dB. I know that if the amplifier is going to be matched to S11* at the working frequency teoretically the input return loss would be infinity, and is represented as a point in the smith chart. So what im looking for is a manner to generate the various cicles for finite IRL.

By the way...
Im using ADS to design the amplifier.

Any sugestions.............???

Best Regards Canosa




Posted  11/12/2012
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