| Presentation | 2007-11-15 An experimental investigation on typical low frequency amplifiers nonlinear response to microwave/quasi-millimeter wave interference Hiroki SEO, Shunichi FUTATSUMORI, Takashi HIKAGE, Toshio NOJIMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Electromagnetic interference (EMI) due to microwave/quasi-millimeter waveband radio waves on low-frequency electronic equipments is mainly caused by nonlinear characteristics of their internal circuits. This is because the envelope of high-frequency signal is detected by the nonlinear response of circuit elements. In this report, to investigate characteristics of interference signal generated by the nonlinear response, interference signal levels depending on frequencies and field strengths of exposure signals are experimentally obtained. Firstly, six types of low frequency basic amplifiers consisting of a single transistor or an operational amplifier IC are fabricated. Secondly, to examine the detection level depending on field strength of 1GHz exposure signal, measurements of interference signal are carried out. The exposure signal is amplitude modulated at 1kHz. We have confirmed 1kHz interference signal level is proportional to the square of exposed electric field strength. Then, to obtain the detection level depending on frequency of exposure signal, EMI experiments using 1GHz-25GHz amplitude modulated signal are conducted. It is confirmed that interference signal levels of transistor amplifiers are rapidly decreased by slope of 17dB/oct. In addition, when the frequency of exposure signal is above 20GHz, interference signal level is below -90dBm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | electromagnetic interference (EMI) / nonlinear response / detection characteristic |
| Paper # | EMCJ2007-86 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2007/11/8(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | An experimental investigation on typical low frequency amplifiers nonlinear response to microwave/quasi-millimeter wave interference |
| Sub Title (in English) | |
| Keyword(1) | electromagnetic interference (EMI) |
| Keyword(2) | nonlinear response |
| Keyword(3) | detection characteristic |
| 1st Author's Name | Hiroki SEO |
| 1st Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University() |
| 2nd Author's Name | Shunichi FUTATSUMORI |
| 2nd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 3rd Author's Name | Takashi HIKAGE |
| 3rd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 4th Author's Name | Toshio NOJIMA |
| 4th Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| Date | 2007-11-15 |
| Paper # | EMCJ2007-86 |
| Volume (vol) | vol.107 |
| Number (no) | 310 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |