To those of you who perform radiated emission qualifications to subject standards on either open area test sites, semi- or fully anechoic chambers:
By way of background, my direct experience and any future activity with RE measurements is vehicle-specific EMI requirements, such as MIL-STD-461, RTCA/DO-160, and CISPR 25, which are all made at one-meter separation. I don’t have a current version of subject standards, and am not interested in acquiring them ($$$). With respect to subject standards, what antenna factors are used today? At one time, there were distance-specific antenna factors, such as 3, 10 or 30 meter antenna factors. Is it just far field antenna factors today? Similarly, are separate polarization-specific (vertical and horizontal) antenna factors used, or is just a single antenna factor, no matter how determined in CISPR 16-1-6, or ANSI C63.5? Finally, how is the height-dependent nature of antenna factors treated? On a 1 - 4 meter height sweep, the antenna factor for wire-type antennas is not constant. My reading of CISPR 16-1-6 says it is a far-field factor, with height dependence covered under the uncertainty assigned to the measurement. Is that the case, or is the height of the antenna somehow recorded and a height-specific antenna factor applied? The latter doesn’t make sense to me, but it is my understanding of what one engineer told me. Thanks in advance, Ken Javor Ph. (256) 650-5261 Mobile: (256) 348-1611 Mobile email: [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: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
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