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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

 Post subject: Need formula for percent bandwidth.
Posted: Thu Jul 12, 2007 6:35 pm 
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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?

 Post subject:
Posted: Thu Jul 12, 2007 6:50 pm 
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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.


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


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


 Post subject:
Posted: Fri Jul 13, 2007 5:30 pm 
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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.

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