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- W4283809080 abstract "Measurements in anechoic chambers do not provide reliable results below a cut-off frequency defined based on the absorber reflectivity. Such a parameter should be assessed in order to further develop data-processing techniques for removing multipath effects at low frequencies. In this paper we propose a single antenna method for characterizing absorber effectiveness by measuring the reflection coefficient at the antenna input over a set of distances between the measuring antenna and the reflecting wall. We used as a probe a low-profile, bowtie antenna and a mobile, controlled platform. In order to improve the directivity, we applied an end-fire type weighting on the measured data. The contribution of the wall reflection at the antenna input, was extracted through a differential method based on computing an estimate of the S <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11</inf> parameter in a reflectionless environment by using the distance averaging method. The technique was successfully demonstrated in an anechoic chamber normally designed to operate over 700 MHz." @default.
- W4283809080 created "2022-07-06" @default.
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- W4283809080 date "2022-05-16" @default.
- W4283809080 modified "2023-09-23" @default.
- W4283809080 title "A Single Antenna Method for Characterizing Absorber Effectiveness at Low Frequency" @default.
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- W4283809080 doi "https://doi.org/10.1109/iwat54881.2022.9811002" @default.
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