| Presentation | 2005/4/14 Estimation of Current Distribution Using Polarization Stabilized MO Probe S. NAKAMATSU, S. MITANI, R. YAMAGUCHI, S. UEBAYASHI, M. KISHI, M. TSUCHIYA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper investigates a magnetic field sensor based on the rotation magnetization phenomenon of a magneto-optical (MO) crystal and the third generation probing scheme to estimate with a high level of accuracy the current distribution of mobile devices that radiate RF waves. The probing scheme, which employs an optical fiber, has a problem in that fluctuation due to optical polarization causes measurement instability. In order to achieve stable measurement, we propose employing a polarization stabilized MO probe. This probe stabilizes the optical polarization through a process in which the polarization signals, which indicate the magnetic field level, are converted into an amplifier signal immediately after the_light passes through the MO crystal. We constructed a prototype probe and its performance is compared to that of the conventional magnetic sensor, which comprises a small loop antenna. The comparison results show that the current distribution can be estimated more accurately using the MO probe than by using a small loop antenna because the MO probe can come into closer proximity to the device under test than the loop antenna and it does not disturb the electromagnetic field. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MO crystal / Polarization Stabilization / MO probe / Optical fiber |
| Paper # | A・P2005-5 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2005/4/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Estimation of Current Distribution Using Polarization Stabilized MO Probe |
| Sub Title (in English) | |
| Keyword(1) | MO crystal |
| Keyword(2) | Polarization Stabilization |
| Keyword(3) | MO probe |
| Keyword(4) | Optical fiber |
| 1st Author's Name | S. NAKAMATSU |
| 1st Author's Affiliation | NTT DoCoMo, Inc.() |
| 2nd Author's Name | S. MITANI |
| 2nd Author's Affiliation | The University of Tokyo |
| 3rd Author's Name | R. YAMAGUCHI |
| 3rd Author's Affiliation | NTT DoCoMo, Inc. |
| 4th Author's Name | S. UEBAYASHI |
| 4th Author's Affiliation | NTT DoCoMo, Inc. |
| 5th Author's Name | M. KISHI |
| 5th Author's Affiliation | The University of Tokyo |
| 6th Author's Name | M. TSUCHIYA |
| 6th Author's Affiliation | National Institute of Information and Communications Technology |
| Date | 2005/4/14 |
| Paper # | A・P2005-5 |
| Volume (vol) | vol.105 |
| Number (no) | 11 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |