High Speed System for Measuring Electromagnetic Field Distribution(Electromagnetic Compatibility (EMC))
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概要
- 論文の詳細を見る
An optically scanning electromagnetic field probe system consisting of an electro-optic or magneto-optic crystal and a galvano scanner is proposed for high-speed electromagnetic field distribution measurements. We used this technique to measure electromagnetic field distributions near printed circuit boards or ICs to address electromagnetic compatibility problems or in designing electronic devices. With our scanning system, we can measure the electric field intensities of about 40,000 points with an area of 40×40mm in about 3 minutes (4ms per point) up to 2.7GHz. We measured the electric near-field distribution above a five-split transmission line using a cadmium telluride (CdTe) electro-optic crystal. The measurement results showed that the spatial resolution of the system was less than 400μm in the case of a common current with a crystal thickness of 1mm. The electric near-field distribution above a microstrip line filter was measured using LiNbO_3 electro-optic crystal. Changes in the distribution according to the frequency were observed. The experimental results obtained using this system were compared with simulation results obtained using a finite-difference time-domain method. The overall results indicated that the measurement system is capable of accurately measuring electric near-fields. We also discuss the invasiveness of the measurement system, due to the electro-optic crystals, in terms of both the experimental and simulated results.
- 2006-10-01
著者
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Suzuki E
Shinshu Univ. Ueda Jpn
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Sato R
National Inst. Of Information And Communications Technol. Sendai‐shi Jpn
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Ota Hiroyasu
Sendai Research Center Nict
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TAKAHASHI Masanori
Sendai Research Center, NICT
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SUZUKI Eiji
TDK Corporation
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ARAKAWA Satoru
Anritsu Corporation
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ARAI Ken
Sendai Research Center, NICT
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SATO Risaburo
Risaburo Sato Laboratory
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Arai K
Sendai Research Center Nict
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Suzuki E
Tdk Corporation
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Takahashi Masanori
Sendai Research Center Nict
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