Hi Doug,
Yes, I have tried a similar approach based on an article a few years back that used two HP 11940 probes mounted on a wooden jig. Maybe someone else on the list can remember who the author was. It worked quite well. Best regards, Brent DeWitt "Douglas C. Smith" <[email protected]> on 07/31/2000 09:53:52 PM Please respond to "Douglas C. Smith" <[email protected]> To: emc-pstc <[email protected]>, SI-LIST <[email protected]> cc: (bcc: Brent Dewitt/US/D-O) Subject: [SI-LIST] : Shielding Effectiveness - or when a dB is not a dB Hi All, Shielding effectiveness is normally measured using plane waves (relatively far from the source). This method of measurement for shielding effectivenes does not always correspond to the way a shielding material is used. It is especially true when shielding material is incorporated into small products, such as the new wave of wireless devices on the market. If you rely on shielding to keep different parts of a product from interfering with each other, correlation of specification to use is especially important. The August 2000 Technical Tidbit on http://www.dsmith.org (or http://emcesd.com) describes a simple method of shielding effectiveness measurement that can be easily done in the development laboratory. This measurement method can give a better measure of shielding effectiveness that industry standard measurement techniques when the shield is close to the source being shielded. Has anyone here who is into shielding used something like this method which uses magnetic field loops? Doug -- ----------------------------------------------------------- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: [email protected] \ _ / ] \ _ / Website: http://www.dsmith.org ----------------------------------------------------------- **** To unsubscribe from si-list or si-list-digest: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu **** CONFIDENTIALITY NOTICE This e-mail communication may contain information that is proprietary, confidential and/or privileged from disclosure under applicable law. The information is intended to be for the use of the addressee only. If the reader of this e-mail is not the intended recipient, you are hereby notified that use, copying, dissemination or continued possession of this communication is strictly prohibited. If you have any reason to believe you are not the intended recipient of this e-mail, please delete all copies of this e-mail from computer memory or storage. Thank you. **** To unsubscribe from si-list or si-list-digest: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu ****
