Abstract
This paper presents measurements of both specular and non-specular
scattering from several submillimeter wave absorber materials designed
for antenna testing and from low-cost carpet materials. The frequency
range is 200–600 GHz in specular scattering, and 300–400 GHz in
non-specular scattering measurements. The constructed bistatic test
bench allows testing of the full continuous angular range of 0°–90°. The
measurement results show large differences in performance of different
materials. It is shown that reflectivities below −50 dB over limited
angular ranges are possible with a correct alignment of the material.
Also, low-cost carpet materials have lower than −15 dB reflectivities in
most angles, and may be useful in non-critical parts of the antenna
test range. The results can be used to optimise the absorber placement
inside an antenna range, concerning both best performance and lowest
cost.
Original language | English |
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Pages (from-to) | 71 - 78 |
Number of pages | 8 |
Journal | International Journal of Infrared and Millimeter Waves |
Volume | 24 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2004 |
MoE publication type | A1 Journal article-refereed |
Keywords
- absorbes
- submillimeter waves
- specular scattering
- non-specular scattering