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Lna Bias Circuit help

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chaos99

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hi i want to know that what is the effect of DC bias lines on amplifier. I designed amplifier and biased it but even i put choke at the end of the resistors , dc transmission lines effects overall gain why?Should i use multilayer architecture?
 

Hi Chaos99


It sounds as though your bias cct is effectively reducing the power to the LNA.
If you look at gain plots Vs VDC you will see there is a direct correlation between the two.
You dont mention what frequency you are working at ? Also what device are you using ?


Kram1966
 

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