I’d like to know that, too! Just kidding. In that frequency range any bond strap connection will be a mismatched transmission line, and the answer obtained will be largely determined by how and where the measurement is made. The accepted way to demonstrate a low impedance rf bond is to measure it at dc or audio frequency, and then use the bond dimensions to calculate the bond inductance. That works up through hf, maybe vhf, depending on whether it is a bond strap or a faying surface bond. At the frequencies cited in the OP, you are looking at distributed inductance and capacitance, and a measurement is either going to be worthless, or a Ph.D. thesis, or both. Ken Javor
Phone: (256) 650-5261 ________________________________ From: Jim Hulbert <[email protected]> List-Post: [email protected] List-Post: [email protected] List-Post: [email protected] Date: Thu, 18 Jun 2009 17:29:16 -0400 To: "EMC-PSTC ([email protected])" <[email protected]> Conversation: Chassis Bond Impedance Measurement Subject: Chassis Bond Impedance Measurement What is an easy (and inexpensive) means of measuring the high frequency chassis bond impedance between two modules of a system? I would like to get an impedance value at 500 MHz and 1 GHz. Thanks. Jim Hulbert Pitney Bowes - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
