Disadvantages of waveguide techniques for measurement of radar-absorbing material characteristics

Romanov A.M., Beljaev А.А., Bespalova E.E.
UDC
678.84
DOI
10.18577/2307-6046-2015-0-3-11-11
Article PDF (Russian) (605.29 KB)
How to cite
Romanov A.M., Beljaev А.А., Bespalova E.E. Disadvantages of waveguide techniques for measurement of radar-absorbing material characteristics // Proceedings of VIAM. 2015. No. 3. DOI: 10.18577/2307-6046-2015-0-3-11-11. URL: https://test.viam.ru/en/journal/2015/3/11
Abstract

It was shown in the paper that the measurement results of reflection ratios of radar-absorbing materials performed in the waveguide for each frequency corresponded to the results of measurements at a certain angle of incidence in case of polarization of the electric vector perpendicular to the plane of incidence; thus, they do not correspond to the measurements at normal incidence. Material permittivity measurement errors caused by a gap between a specimen and waveguide wall were estimated. A simplified expression for estimation of the relative error of permittivity measurements and some examples of errors calculation for the above two cases are given in the paper.

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