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LNA ( S parameters ) - RF Cafe Forums
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amit
Post subject: LNA ( S parameters ) Posted: Tue Jul 26, 2005
5:03 am
hi to all ,
can anyone help me , please ?
I want to
know that how can we fabricate FET with desired S parameters ? let me
clear my question ....
suppose that I design LNA with S parameters
taking from datasheet and now when I make its' layout I must make FET
with exactly same S parameters as I took from datasheet. Please help
me ....
you can mail me at :-
amitgopal1@rediffmail.com
Thanks
--amit
Top
IR
Post subject: Posted:
Tue Jul 26, 2005 6:25 am
Site Admin
Joined: Mon Jun
27, 2005 2:02 pm
Posts: 373
Location: Germany
Hi Amit,
You have to take the S-Parameters from the data sheet. Usually manufacturers
will provide S2P file for the device. Before you make the layout, you
have to make simulation, and enter the properties of the transmission
lines, via holes for ground and any other physical connection into the
simulation. Another important thing is to enter the proerties of the
substrate you intend to use into the simulation (Its dielectric constant,
Tan delta, width etc).The simulation will give you overall S-Parameters
of the design including total gain and return losses. When you fabriacate
your circuit you take from this simulation the dimensions of transmion
lines and via holes for grounds.
_________________
Best regards,
- IR
Posted 11/12/2012
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