The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Les caractéristiques de réflexion réactive en champ proche des absorbeurs RF commerciaux sont étudiées pour déterminer la taille minimale d'une boîte anéchoïque de champ réactif nécessaire pour mesurer le champ proche réactif d'une antenne ESPAR. La réflectivité de l'absorbeur placé à proximité immédiate d'une antenne est inversement proportionnelle à la distance entre l'antenne et l'absorbeur. Pour les absorbeurs coniques en mousse d'uréthane chargée de carbone, nous constatons que les caractéristiques de réflexion rétrodiffusée dépendent principalement de leur hauteur conique plutôt que de l'épaisseur de la base de l'absorbeur. En conséquence, nous montrons que des absorbeurs pyramidaux et en forme de surface d'onde en mousse d'uréthane chargée de carbone peuvent être utilisés pour fabriquer des boîtes anéchoïques à champ réactif. Un prototype de boîte anéchoïque à champ réactif est présenté et la distance entre l'absorbeur et l'antenne est réduite à une longueur d'onde. Le prototype est vérifié en comparant ses performances avec celles obtenues à partir d'une grande chambre anéchoïque.
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Qing HAN, Keizo INAGAKI, Kyouichi IIGUSA, Robert SCHLUB, Takashi OHIRA, "Reactive-Field Anechoic Box for ESPAR Antenna Measurement" in IEICE TRANSACTIONS on Electronics,
vol. E85-C, no. 7, pp. 1451-1459, July 2002, doi: .
Abstract: Reactive near field reflection characteristics of commercial RF absorbers are investigated to determine the minimum size of a reactive-field anechoic box necessary for measuring the reactive near field of an ESPAR antenna. The reflectivity of the absorber placed in close proximity to an antenna is inversely proportional to the distance between the antenna and the absorber. For carbon filled urethane foam tapered absorbers, we find that the backscattered reflection characteristics mainly depend on their tapered height rather than the thickness of absorber base. As a result, we show that carbon filled urethane foam pyramidal and wave surface shaped absorbers can be used to make reactive-field anechoic boxes. A prototype of a reactive-field anechoic box is presented and the distance from the absorber to the antenna is reduced to a wavelength. The prototype is verified by comparing its performance with that obtained from a large anechoic chamber.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_7_1451/_p
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@ARTICLE{e85-c_7_1451,
author={Qing HAN, Keizo INAGAKI, Kyouichi IIGUSA, Robert SCHLUB, Takashi OHIRA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Reactive-Field Anechoic Box for ESPAR Antenna Measurement},
year={2002},
volume={E85-C},
number={7},
pages={1451-1459},
abstract={Reactive near field reflection characteristics of commercial RF absorbers are investigated to determine the minimum size of a reactive-field anechoic box necessary for measuring the reactive near field of an ESPAR antenna. The reflectivity of the absorber placed in close proximity to an antenna is inversely proportional to the distance between the antenna and the absorber. For carbon filled urethane foam tapered absorbers, we find that the backscattered reflection characteristics mainly depend on their tapered height rather than the thickness of absorber base. As a result, we show that carbon filled urethane foam pyramidal and wave surface shaped absorbers can be used to make reactive-field anechoic boxes. A prototype of a reactive-field anechoic box is presented and the distance from the absorber to the antenna is reduced to a wavelength. The prototype is verified by comparing its performance with that obtained from a large anechoic chamber.},
keywords={},
doi={},
ISSN={},
month={July},}
Copier
TY - JOUR
TI - Reactive-Field Anechoic Box for ESPAR Antenna Measurement
T2 - IEICE TRANSACTIONS on Electronics
SP - 1451
EP - 1459
AU - Qing HAN
AU - Keizo INAGAKI
AU - Kyouichi IIGUSA
AU - Robert SCHLUB
AU - Takashi OHIRA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 2002
AB - Reactive near field reflection characteristics of commercial RF absorbers are investigated to determine the minimum size of a reactive-field anechoic box necessary for measuring the reactive near field of an ESPAR antenna. The reflectivity of the absorber placed in close proximity to an antenna is inversely proportional to the distance between the antenna and the absorber. For carbon filled urethane foam tapered absorbers, we find that the backscattered reflection characteristics mainly depend on their tapered height rather than the thickness of absorber base. As a result, we show that carbon filled urethane foam pyramidal and wave surface shaped absorbers can be used to make reactive-field anechoic boxes. A prototype of a reactive-field anechoic box is presented and the distance from the absorber to the antenna is reduced to a wavelength. The prototype is verified by comparing its performance with that obtained from a large anechoic chamber.
ER -