In message <cca44bd5.2f750%[email protected]>, dated Wed, 17
Oct 2012, Ken Javor <[email protected]> writes:
There are indeed near field test methods. They are enshrined in
vehicle-based standards, such as MIL-STD-461, DEF-STAN-5941,
RTCA/DO-160 and its EUROCAE equivalent, and CISPR 25 for automotive use.
In order to address the valid concerns Mr. Woodgate raises, these
standards not only specify antenna-test sample separation, but also the
specific type of electric field probe or antenna used in each frequency
band.
Indeed: you can get repeatability for near-field measurements on one
product by rigidly controlling the test conditions. But each product
needs its own set of test conditions because exact physical disposition
of *everything* is required.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
The longer it takes to make a point, the more obtuse it proves to be.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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