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
As características de reflexão de campo próximo reativo de absorvedores de RF comerciais são investigadas para determinar o tamanho mínimo de uma caixa anecóica de campo reativo necessária para medir o campo próximo reativo de uma antena ESPAR. A refletividade do absorvedor colocado próximo a uma antena é inversamente proporcional à distância entre a antena e o absorvedor. Para absorvedores cônicos de espuma de uretano preenchidos com carbono, descobrimos que as características de reflexão retroespalhadas dependem principalmente de sua altura cônica, e não da espessura da base do absorvedor. Como resultado, mostramos que absorvedores piramidais e em formato de superfície ondulada de espuma de uretano preenchidos com carbono podem ser usados para fazer caixas anecóicas de campo reativo. Um protótipo de caixa anecóica de campo reativo é apresentado e a distância do absorvedor à antena é reduzida a um comprimento de onda. O protótipo é verificado comparando seu desempenho com o obtido em uma grande câmara anecóica.
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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},}
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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 -