| Presentation | 2014-04-18 Numerical Simulations on reflection coefficients of pyramidal wave absorber by incident azimutn directions Takahiro AOYAGI, Hiroshi KURIHARA, Koji TAKIZAWA, Yoshihito HIRAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is known that reflection wave from a pyramidal type electromagnetic wave absorber used as a wall of anechoic chambers includes high mode diffraction waves. Our research group have studied by experiments and numerical simulations about influence of higher mode diffraction waves from pyramidal wave absorber on performances of anechoic chambers and SVSWR measurements. To analyze or design high frequency or high accuracy anechoic chambers, it is highly required to analyze wave absorbers with high accuracy by considering diffraction waves. Only a parallel incident direction to the base of the pyramid was considered in our previous reports. However, when the incident azimuth is changed, reflection coefficients are supposed to be varied. Therefore, in this report, we examined the change of the coefficients of the diffraction waves from a pyramid type wave absorber by FDTD method when incident azimuth angles are changed. As a result, it was confirmed that diffraction coefficients changed depending on incident azimuth angles and frequencies. We are going to study about the application to a comparison between this results and real measurement and designs of wave absorber in future. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Pyramid type wave absorber / anechoic chamber / EMC / diffraction wave / incident azimuth angle |
| Paper # | EMCJ2014-5 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2014/4/11(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) | Numerical Simulations on reflection coefficients of pyramidal wave absorber by incident azimutn directions |
| Sub Title (in English) | |
| Keyword(1) | Pyramid type wave absorber |
| Keyword(2) | anechoic chamber |
| Keyword(3) | EMC |
| Keyword(4) | diffraction wave |
| Keyword(5) | incident azimuth angle |
| 1st Author's Name | Takahiro AOYAGI |
| 1st Author's Affiliation | Department of Human System Science, Graduate School of Decision Science and Technology, Tokyo Institute of Technology() |
| 2nd Author's Name | Hiroshi KURIHARA |
| 2nd Author's Affiliation | EMC&RF Engineering Buisiness Division, TDK Corporation |
| 3rd Author's Name | Koji TAKIZAWA |
| 3rd Author's Affiliation | EMC&RF Engineering Buisiness Division, TDK Corporation |
| 4th Author's Name | Yoshihito HIRAI |
| 4th Author's Affiliation | EMC&RF Engineering Buisiness Division, TDK Corporation |
| Date | 2014-04-18 |
| Paper # | EMCJ2014-5 |
| Volume (vol) | vol.114 |
| Number (no) | 15 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |