| Presentation | 2010-07-16 Size Dependence of Return Ground Patterns on FM-Band Cross-Talks between Two Parallel Signal Traces on Printed Circuit Boards for Vehicles Michihira IIDA, Tsuyoshi MAENO, Osamu FUJIWARA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is well known that electromagnetic disturbances in vehicle-mounted radios are mainly caused by conducted noise currents flowing through wiring-harnesses from vehicle-mounted printed circuit boards (PCBs) with common ground patterns containing slits. To suppress the noise currents outflow from PCBs of these kind, we previously measured noise currents outflow from simple two-layer PCBs having two parallel signal traces and different ground patterns with/without slits, which revealed that making slits with open ends on the ground patterns in parallel with the traces can reduce the conducted noise currents. In the present study, using FDTD simulation, we investigated reduction characteristics of the FM-band cross-talk noise levels between two parallel signal traces using four simple PCB models, with each PCB model having different ground patterns formed in different numbers but containing the same planar dimension slits parallel to the traces together with two simple PCB models which have different ground patterns divided into two parts parallel to the traces. As a result, we found that the cross-talk noise currents for the above six types of PCBs decrease by 6.9-8.5dB compared to the PCB which has a plain ground with no slit. From this study, we got the finding that the contributing factor for the above mentioned cross-talk reduction relies on the reduction of mutual inductance between the two parallel traces. In addition, in case of this study, it is interesting to note that the noise currents outflow from PCBs can rather be suppressed when the size of the return ground of each signal trace is small. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Electromagnetic disturbances in vehicle-mounted radios / simple printed circuit boards / slits / two parallel signal traces / cross-talk noise |
| Paper # | EMCJ2010-38,EMD2010-23 |
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| Conference Information | |
| Committee | EMD |
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| Conference Date | 2010/7/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromechanical Devices (EMD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Size Dependence of Return Ground Patterns on FM-Band Cross-Talks between Two Parallel Signal Traces on Printed Circuit Boards for Vehicles |
| Sub Title (in English) | |
| Keyword(1) | Electromagnetic disturbances in vehicle-mounted radios |
| Keyword(2) | simple printed circuit boards |
| Keyword(3) | slits |
| Keyword(4) | two parallel signal traces |
| Keyword(5) | cross-talk noise |
| 1st Author's Name | Michihira IIDA |
| 1st Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology() |
| 2nd Author's Name | Tsuyoshi MAENO |
| 2nd Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology |
| 3rd Author's Name | Osamu FUJIWARA |
| 3rd Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology |
| Date | 2010-07-16 |
| Paper # | EMCJ2010-38,EMD2010-23 |
| Volume (vol) | vol.110 |
| Number (no) | 133 |
| Page | pp.pp.- |
| #Pages | 6 |
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