How can i design a LNA using Smith plot ?

[brian39]

is there anyone can give me some instances about the LNA desing using

Smith plot , such as consideration on gain , NF , matching , etc ?

Thanks !

 

[jupitorcuu]

for APPCAD you can input S2p file
And you can get the best point of NF or Gain

 

[brian39]

I now have a LNA file for s2p format , but can't judge the best point for Gain and NF . Sorry , Could you provide some
instances for it for my understanding?
Thanks.

 

[jupitorcuu]

first download a Appcadsoftware
and then select circuit design.
Open you *.s2Pfile from them
input the item you want to know.
finally you can see best point is you design target(no need to exactly meet it ,as near as you can)

 

[brian39]

I knew what you mentioned above , but what i mean is how to realize the best point ( or as near as it) on plot , such as matching according to its Z, it can be done in APPCAD ?

Looking forward to your reply.