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Pindiodes infront of LNA

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akhilpaulv

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Hi all,
Why two pindiodes in opposite sides with capacitor used infront of LNAs ??
Frequency of LNA is around 60MHz

Akhil
 

I used PIN diodes as a T/R switch. They were in front of my LNA. It is also possible that your PINs are being used as limiters to prevent overloading your LNA. Without a schematic, we can only guess.
 
SLK001 said:
I used PIN diodes as a T/R switch. They were in front of my LNA. It is also possible that your PINs are being used as limiters to prevent overloading your LNA. Without a schematic, we can only guess.
Click to expand...

Hi thankyou for your replay . When i put the model in the simulation software its gives a junk value . ATTUNATOR.PNG
 

So you've got a model of a PIN diode. Where is the schematic for your circuit?

With what you show, nearly 100% of the signal is being shunted to ground, but without a schematic, this is only a guess.
 
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