Theory for mixer conversion gain

[gecky]

Hi All,

I need some help on calculating the theorectical conversion gain for an up-converter. Anyone can direct me to the correct books/papers/www ? I searched on the net but can't find anything useful.

Many Thanks!

 

[DonJ]

Hi

The theoretical gain of a mixer is the same either for up or down conversion.
Parameters of interest: gm, Zload, switching effeciency

all the best

 

[gecky]

Hi DonJ.

Thanks! I'm working on a FET mixer (a self-oscillating mixer actually) with RF input at the gate. I have a estimate of the FET intrinsic parameters and the mixer load/source impedances. Any idea what formulas I should use and where I can find them?

I've done ADS simulation but I also need the theorectical conversion gain.

Thanks!

 

[gecky]

Hi All,

I'm still looking for info on FET mixer conversion gain......

Thanks!

 

[gecky]

Hi All,

any follow ups on conversion gain theory for FET mixers?

I refer you to the attached paper.... This is the case for down-conversion. I tried solving the matrices involved for up-conversion case and it was horrible. No simplification is possible. Will be good if someone can tell me how else i can go about deriving the gain.

I cannot use ADS because I'm designing a self-oscillating mixer and the HB simulator can only solve for Either Oscillator Or Mixer.....

Please help!!! Thanks!

 

[nxing]

I think that you can find that formula at any RF books, like Thomas Lee's book or Razavi's RF book.

Good Luck!