Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums RF Cafe Homepage Thank you for visiting RF Cafe!

LNA ( S Parameters ) - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement

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 :-


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

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Kirt Blattenberger,

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !