Back around 1998 when I worked for Tandem Computers (purchased by Compaq in 1998, then purchased by HP in 2001), I visited the HP EMC Lab in Washington state (I went to see their 10m chamber since we were thinking of getting a 2nd 10m chamber, which we did).
Well they used two antennas connected to two separate receivers for their RE tests. Can't remember if it was horizontal and vertical OR if it was two frequency ranges (30-300MHz and 300-1000MHz), but it was definitely two antennas and two receivers. At that time they were also experimenting with 4 antennas but I think still 2 receivers, but don't know if that was actually implemented. They wrote their own custom test software to handle the multiple antenna / receiver combinations. The guy who ran that HP EMC test lab was Bob Dockey who later went to Philips Medical, if you can find him maybe he can elaborate on their RE test system of the time. A year later we (now Compaq) purchased a new 10m chamber (now we had two), so I was thinking about the two antenna RE test method as well. But then in 2002 (now HP), HP shut down two full EMC labs with three 10m chambers (all within 1 mi area in Cupertino, CA), and laid off almost all EMC personnel, something about too many labs and equipment after the corporate merger. They ended up taking equipment to be tested to their Roseville, CA EMC test lab, about 100 miles north. So I never got a chance to research and implement the 2 antenna RE test system. Had all the equipment, but it was too late. Manny Barron On Mon, May 2, 2022 at 11:00 AM Patrick <conwa...@gmail.com> wrote: > 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 < > emc-p...@ieee.org> > > 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) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
