Dear all, In EN300330 radiated emission measurement, Annex A 1.1 mentioned about for measurement (on an outdoor test site) of frequencies below 30MHz, no artificial ground plane shall be used. But for 30MHz or above, a conducting ground plane shall be used. Is anyone know the reason why the ground plane is not needed for frequency below 30MHz? There are two other options test site for the test, one is the indoor site of min. 6m x 7m with a barrier of absorbent material in front of the wall, but this site is only for frequency over 80MHz.Why the sized needed so big and the frequency is over 80MHz (not 30MHz)? Another option is use anechoic chamber, but just for frequency over 30MHz. I have an idea how about I use a fully anechoic chamber (absober placed on the floor between the EUT and receiving antenna) instead of the outdoor test site without ground plane, any difference between them? Thanks advance for any comment or idea. Regards,
Derek. 有即時通知，收艂 -------------- ------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
