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 Thank you for visiting RF Cafe!

Calculating the Inductance and Q of Spiral Inductors - 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


mmaassel
 Post subject: Calculating the Inductance and Q of Spiral Inductors
Posted: Thu Sep 16, 2010 2:46 pm 
 
Colonel
 

Joined: Mon Apr 10, 2006 12:43 pm
Posts: 25
Good day.

I am working on calculating the inductance and Q of some spiral inductors. These inductors are modeled using Momentum from Agilent.

A Momentum example gives the following procedure -

(1) Convert the S-Parameters to Z-Parameters using
ZM_2p=stoz(s)

(2) Convert the 2 port Z-parameters to a 1 port Z-parameters. Agilent states that Port 2 is considered to be grounded.
Z_2pTo1p=ZM_2p(1,1)-2*ZM_2p(1,2)+ZM_2p(2,2)

Then use the real and imaginary parts to determine the inductance and resistance.

The question I have is in step 2.
I come up with the equation
Z_2pTo1p=ZM_2p(1,1)-(2*ZM_2p(1,2))/(ZM_2p(2,2))

Where did I go wrong?
Thank you
Michael




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
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

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:
 AirplanesAndRockets.com

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

height-line