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!

Microstrip Antenna - 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: microstrip antenna
Posted: Wed Jan 04, 2006 7:24 pm 

Joined: Sat Apr 23, 2005 2:09 pm
Posts: 17
Location: Tampa, FL
I heard that microstrip antennas are only good from 100 MHz and up. What's the design limitation for lower frequencies in regards to microstrip antennas?

Kirt Blattenberger
 Post subject:
Posted: Thu Jan 05, 2006 8:04 pm 
Site Admin
User avatar

Joined: Sun Aug 03, 2003 2:02 pm
Posts: 308
Location: Erie, PA
Greetings Qacer:

The frequency limit is governed by the wavelength of your signal(s) in the substrate. A wavelength calculator is available here. Enter your frequency of interest and the dielectric constant of the substrate.

For example, FR4 has a dielectric constant of around 4.5, so the wavelength of 100 MHz in it is about 1.4 meters (55 inches). If you want to implement any passive circuitry that requires a wavelength shift along the line (as is necessary for filters, power splitters, baluns, etc.), very large substrate would be required.

If all you need is a substrate to implement 50 ohm (or other another impedance) transmission lines to interconnect components, then microstrip can be used at any frequency.

- Kirt Blattenberger :smt024
RF Cafe Progenitor & Webmaster

 Post subject:
Posted: Tue Jan 24, 2006 9:55 am 
an introduction on microstip antenna:

http://www.4shared.com/file/742081/ae5d ... strip.html

 Post subject:
Posted: Tue Jan 24, 2006 12:17 pm 
Thank you all!

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 !