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On the Limitations of off-normal-incident Measurement of Reflectivity Performance of Microwave Absorbers
Authors: Amin Enayati, Vince Rodriguez
Publication: AMTA 2023
Copyright Owner: Emerson & Cuming, NSI-MI Technologies
Challenges and limitations of off-normal reflectivity
measurements of microwave anechoic chambers are presented.
The NRL-Arch technique has been investigated for measurement
of WAVASORB® VHP-26 for extreme incident angles; e. g. 80°
for the frequency range of 1-20 GHz. It has been shown that the
standard test techniques such as NRL-Arch have limitations and
for extreme incident angles, simulation values are more reliable
in most of the cases. In some rare cases some advanced
techniques are available in the literature which are expensive and
can be recommended for special projects only.
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