Likely a totally different application than yours, but a long time ago on OATS measurements, there was development of a two-antenna test where one was for the actual measurement, but the other was pointed away to pick up the ambient, and the idea was to subtract the ambient out, and leave only the EUT emissions.
It was controversial. MIL-STD-826 (1964 – 1967) had radiated emission antenna set-up drawings showing all antennas deployed simultaneously. In the days when each antenna had its own receiver, if you had enough techs that could speed up the test significantly. It should be noted that was unique to MIL-STD-826 and it did not survive into MIL-STD-461. I’m thinking in your specific application, the antennas should be separated by some distance, so that they don’t affect each other. What that separation needs to be will depend on the desired uncertainty in the measurement. -- Ken Javor (256) 650-5261 From: Patrick <[email protected]> Reply-To: Patrick <[email protected]> Date: Monday, May 2, 2022 at 2:00 PM To: <[email protected]> Subject: [PSES] Dual antenna during RE test ? Hi All - I'm wondering if there is any academic or practical literature on the use of two antennas during an emissions test. For example, research or experiments on the use of two DRH's above 1.0 GHz, side-by-side, one vertical, the other horizontal. Have any researchers looked at this? Are there any experimental studies? Thank you. -Patrick - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 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]>
