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
Um novo sistema de medição da amplitude e fase do campo magnético de RF é proposto. É composto por um diodo laser (LD) ligado a uma pequena antena circular, uma linha de transmissão de fibra óptica e instrumentos de detecção sensíveis à fase. A luz de saída LD é diretamente modulada em intensidade pela corrente de RF induzida na antena de quadro pelo campo magnético de RF em teste. A amplitude instantânea e a fase do campo magnético de RF são preservadas na luz modulada devido à resposta rápida do LD e são detectadas pelo sistema de detecção remota. As características da calibração, a sensibilidade, o campo mínimo detectável e a resposta de frequência são analisadas detalhadamente. O sistema é altamente sensível, não perturbador e não interativo. Além dessas vantagens, a excelente propriedade para medir a fase do campo magnético de RF é confirmada experimentalmente por muitas medições de campo. Consequentemente, o campo magnético de RF mínimo detectável é obtido como 10 µA/cm (38 nW/cm2 em densidade de potência) notavelmente menor do que outros.
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Ken-ichi HAYASHI, Kazuo ARAI, Yoshio IDA, "Measuring System Sensitive to Amplitude and Phase of RF Magnetic Field Using LD and Optical Fiber" in IEICE TRANSACTIONS on transactions,
vol. E70-E, no. 2, pp. 135-140, February 1987, doi: .
Abstract: A novel measuring system on the amplitude and phase of the RF magnetic field is proposed. It is composed of a laser diode (LD) linked with a small loop antenna, an optical fiber transmission line, and phase-sensitive detection instruments. The LD output light is directly intensity-modulated by the RF current induced in the loop antenna by the RF magnetic field under test. The instantaneous amplitude and phase of the RF magnetic field are preserved in the modulated light because of the quick response of LD and are detected by the remote detection system. The characteristics of the calibration, the sensitivity, the minimum detectable field, and the frequency response are analyzed in detail. The system is highly sensitive, nonperturbing, and noninteractive. In addition to these advantages, the excellent property for measuring the phase of the RF magnetic field is experimentally confirmed by many field measurements. Resultantly, the minimum detectable RF magnetic field is obtained as 10 µA/cm (38 nW/cm2 in power density) remarkably lower than others.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e70-e_2_135/_p
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@ARTICLE{e70-e_2_135,
author={Ken-ichi HAYASHI, Kazuo ARAI, Yoshio IDA, },
journal={IEICE TRANSACTIONS on transactions},
title={Measuring System Sensitive to Amplitude and Phase of RF Magnetic Field Using LD and Optical Fiber},
year={1987},
volume={E70-E},
number={2},
pages={135-140},
abstract={A novel measuring system on the amplitude and phase of the RF magnetic field is proposed. It is composed of a laser diode (LD) linked with a small loop antenna, an optical fiber transmission line, and phase-sensitive detection instruments. The LD output light is directly intensity-modulated by the RF current induced in the loop antenna by the RF magnetic field under test. The instantaneous amplitude and phase of the RF magnetic field are preserved in the modulated light because of the quick response of LD and are detected by the remote detection system. The characteristics of the calibration, the sensitivity, the minimum detectable field, and the frequency response are analyzed in detail. The system is highly sensitive, nonperturbing, and noninteractive. In addition to these advantages, the excellent property for measuring the phase of the RF magnetic field is experimentally confirmed by many field measurements. Resultantly, the minimum detectable RF magnetic field is obtained as 10 µA/cm (38 nW/cm2 in power density) remarkably lower than others.},
keywords={},
doi={},
ISSN={},
month={February},}
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TY - JOUR
TI - Measuring System Sensitive to Amplitude and Phase of RF Magnetic Field Using LD and Optical Fiber
T2 - IEICE TRANSACTIONS on transactions
SP - 135
EP - 140
AU - Ken-ichi HAYASHI
AU - Kazuo ARAI
AU - Yoshio IDA
PY - 1987
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E70-E
IS - 2
JA - IEICE TRANSACTIONS on transactions
Y1 - February 1987
AB - A novel measuring system on the amplitude and phase of the RF magnetic field is proposed. It is composed of a laser diode (LD) linked with a small loop antenna, an optical fiber transmission line, and phase-sensitive detection instruments. The LD output light is directly intensity-modulated by the RF current induced in the loop antenna by the RF magnetic field under test. The instantaneous amplitude and phase of the RF magnetic field are preserved in the modulated light because of the quick response of LD and are detected by the remote detection system. The characteristics of the calibration, the sensitivity, the minimum detectable field, and the frequency response are analyzed in detail. The system is highly sensitive, nonperturbing, and noninteractive. In addition to these advantages, the excellent property for measuring the phase of the RF magnetic field is experimentally confirmed by many field measurements. Resultantly, the minimum detectable RF magnetic field is obtained as 10 µA/cm (38 nW/cm2 in power density) remarkably lower than others.
ER -