Search RFC: |                                     
Please support my efforts by advertising!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™
Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post
Please Support My Advertisers!

Aegis Power | Centric RF | RFCT
Alliance Test | Empower RF
Isotec | Reactel | SF Circuits

Formulas & Data

Electronics | RF
Mathematics
Mechanics | Physics


About | Sitemap
Homepage Archive

Resources

Articles, Forums, Radar
Magazines, Museum
Radio Service Data
Software, Videos


Artificial Intelligence

Entertainment

Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes

Parts & Services

1000s of Listings

Please support RF  Cafe's GoFundMe campaign! Software: RF Cascade Workbook | Espresso Engineering Workbook
RF Stencils for Visio | RF Symbols for Visio | RF Symbols for Office | Cafe Press


Crane Aerospace Electronics Microwave Solutions

everythingRF RF & Microwave Parts Database (h1)

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe

Microstrip Substrate Equations

You can work these formulas manually, or download this great free microstrip calculator (TX Line) from Cadence/AWR.

Here is a really nice summary of many controlled impedance line equations, by Rick Hartley: RF / Microwave PC Board Design and Layout

Equations are given for calculating the effective width and height prior to plugging the dimensions prior to plugging them in to the equations for effective dielectric constant and then for calculating the impedance.

Be aware that there are many microstrip impedance calculators on the Internet that give sometimes widely varying results. Be sure of which one you finally decide to use. Most claim to use some or all of these formulas these formulas, but I have discovered ones, for instance, that appear to mistakenly substitute 0.4 for 0.04 in the εeff formula for the W/H<1 case.

Effective Width and Height
Microstrip calculation equation - RF Cafe
RF Cafe: Microstrip calculation equation
Microstrip equations - RF Cafe

Wavelength

Microstrip substrate dimensions for impedance calculation - RF Cafe
Microstrip calculation equation - RF Cafe

Phase

RF Cafe: Microstrip calculation equation
for  - RF Cafe Microstrip calculation equation - RF Cafe
Microstrip calculation equation - RF Cafe
RF Cafe: Microstrip calculation equation
  for  RF Cafe: Microstrip calculation equation Microstrip calculation equation - RF Cafe
Microstrip calculation equation - RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe