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!

Need Formula for Percent Bandwidth - 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


jstover
 Post subject: Need formula for percent bandwidth.
Posted: Thu Jul 12, 2007 6:35 pm 
 
Lieutenant
User avatar

Joined: Thu Jul 12, 2007 6:21 pm
Posts: 2
I need the formula to calculate percent of bandwidth, as in "60 GHz, +/-5%." Can someone help?


 
   
 
jaslovkel
 Post subject:
Posted: Thu Jul 12, 2007 6:50 pm 
 
Captain
User avatar

Joined: Tue Jun 26, 2007 10:27 am
Posts: 14
Location: Dallas, TX
Hi jstover,

If we assume that there is a given center frequency called fc and we need to know the ranges we need to measure around fc in percentage, we can use the following formula to find the lower(fl) and higher(fh) frequencies which the percentage will allow.

fl=fc*(1-%/100)
fh=fc*(1-%/100)

So, if we assume that fc=60GHz and there is a +/- 5% bandwidth around this, then we can find:

fl=60GHz*(1-5/100)=57GHz
fh=60GHz*(1+5/100)=63GHz

I hope this is what you were asking for and that it helps you out.

-J


 
   
 
jstover
 Post subject:
Posted: Fri Jul 13, 2007 5:30 pm 
 
Lieutenant
User avatar

Joined: Thu Jul 12, 2007 6:21 pm
Posts: 2
Thanks for your response. Somehow, I remembered it as being more complex than simple percentage math.




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