Your browser does not support JavaScript!

Appendix F: Measuring Resonant Structures

Appendix F: Measuring Resonant Structures

For access to this article, please select a purchase option:

Buy chapter PDF
(plus tax if applicable)
Buy Knowledge Pack
10 chapters for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
EMI Troubleshooting Cookbook for Product Designers — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Cables or other metal (antenna-like) structures can couple to sources of common mode currents and end up radiating, causing product failures during compliance testing. During the troubleshooting process, it would be helpful to determine the resonant frequency of these cables or structures to confirm they are the source of certain harmonic signals. Often, as you probe a circuit board or measure the emissions from a product, you may notice a group of individual harmonics, which peak in amplitude over a given frequency range. This may indicate that a metal structure or cable is resonant at these peak frequencies. By analyzing whether the cable or structure is a halfwave or quarter-wave long, it might be identified and remediated in some way. To do so, you will need to convert the frequency into a corresponding quarteror half-wavelength.

Inspec keywords: antenna testing; frequency estimation; telecommunication cables; failure analysis

Other keywords: compliance testing; common mode current; frequency conversion; resonant structure measurement; circuit board; resonant frequency determination; cable structure; harmonic signals; troubleshooting process; product failure

Subjects: Reliability; Wires and cables; Single antennas; Other topics in statistics

Related content

This is a required field
Please enter a valid email address