If you are using the coaxial test fixture per the ASTM SE test method you could insert a directional coupler with reverse power tap just before the fixture and measure how much power is getting splashed back. With that number, plus the total loss in the system measured as the power getting through the fixture vs. the known power out of the signal source, you can back out what is reflected and what is absorbed.
---------- >From: "Wani, Vijay (V)" <[email protected]> >To: "'[email protected]'" <[email protected]>, "'[email protected]'" <[email protected]> >Subject: emi shielding >Date: Fri, Nov 9, 2001, 9:36 AM > > > hello: > > as we know, threre are two main component of shielding effectiveness. > (Absorbtion and Reflection). is there any way to find out.. what percentage > of overall shielding is due to absorbtion / reflection for a given material? > > thank you in advance. > > Vijay Wani > Dow Chemical > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old > messages are imported into the new server. > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
