| Presentation | 2010-01-21 Leaked Emissions due to the In-House Broadband Powerline Communications (2) : Measurements by HF Radio Astronomy Antennas Masatoshi OHISHI, Masahiro KITAGAWA, Hiroaki MISAWA, Fuminori TSUCHIYA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | There have been the concerns that the Japanese broadband Power Line Communications (PLC) may cause harmful interference to a variety of radio services. It is thought that the interference would be maximal for the radio astronomy observations where extremely weak signals are observed by very sensitive receiving systems. We carried out measurements of the leaked emissions caused by PLC modems by using HF radio astronomy antennas that are actually used. The measurements were conducted at the litate observatory of the Tohoku university, and it was found that the leaked emissions from the house were detected even at the distance of about 130m, and that the intensities are stronger than the threshold levels of interference harmful to the radio astronomy observations by more than a factor of about 50,000. This result would indicate that the radio astronomy observations in the HF band could be strongly disturbed by the PLC modems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | broadband power line communications / leaked electric field / radio astronomy |
| Paper # | EMCJ2009-108 |
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| Committee | EMCJ |
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| Conference Date | 2010/1/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Leaked Emissions due to the In-House Broadband Powerline Communications (2) : Measurements by HF Radio Astronomy Antennas |
| Sub Title (in English) | |
| Keyword(1) | broadband power line communications |
| Keyword(2) | leaked electric field |
| Keyword(3) | radio astronomy |
| 1st Author's Name | Masatoshi OHISHI |
| 1st Author's Affiliation | National Astronomical Observatory of Japan() |
| 2nd Author's Name | Masahiro KITAGAWA |
| 2nd Author's Affiliation | Graduate School of Engineering Science, Osaka University |
| 3rd Author's Name | Hiroaki MISAWA |
| 3rd Author's Affiliation | Planetary Plasma and Atomospheric Research Center, Tohoku University |
| 4th Author's Name | Fuminori TSUCHIYA |
| 4th Author's Affiliation | Planetary Plasma and Atomospheric Research Center, Tohoku University |
| Date | 2010-01-21 |
| Paper # | EMCJ2009-108 |
| Volume (vol) | vol.109 |
| Number (no) | 370 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |