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RF CIRCUIT DESIGN BY ADS - RF Cafe Forums

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 Post subject: RF CIRCUIT DESIGN BY ADS
Posted: Sat Feb 13, 2010 12:47 am 
 
Lieutenant

Joined: Sat Feb 13, 2010 12:16 am
Posts: 1
Hi everybody!

Excuse me, I'm studding MSC,I looking for procedure design The RF amplifier work in 34GHz, i know i should make matching for cct. in s-parameter but idont know how i do bias cct without effect the matching cct.


 
   
 
 Post subject: Re: RF CIRCUIT DESIGN BY ADS
Posted: Sun Feb 14, 2010 8:25 pm 
 
General
User avatar

Joined: Wed Feb 22, 2006 3:51 pm
Posts: 119
David,
At 34 GHz, there may be unavoidable interaction between the impedance matching circuit and the bias circuit - especially if you're trying to get a broad-band amplifier.

That said, a quarter-wave line (acting as a transformer) from the bias source to the active device may help - but pretty much all passive devices will be composites. By which I mean, there will be unavoidable capacitance to your resistors, unavoidable resistance all over the place in your transmission lines and resonators. Your best bet is just to make allowances.

Good Luck!





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