| Presentation | 2012-01-27 A Study on Measurement Method for Wave Absorber Constructed on Ceiling of the ETC Gate Nayuta KAMIYA, Takenori YASUZUMI, Yukinori MATSUSITA, Yasuyuki MATSUDA, Osamu HASHIMOTO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a measurement method using a metal plate lens antenna for evaluating a wave absorber constructed on ceiling of the ETC gate. First, a focal distance of the lens was derived to be 129 cm by using geometrical optics. By arranging the lens in front of a horn antenna, the gain and half power beam width were improved from 18 dBi to 26 dBi and from 22 degrees to 7 degrees, respectively. Then the antenna characteristics were evaluated by taking the lens away from the focal point in order to miniaturize the lens antenna. As the results, the change in half power beam width was small when the lens came close to the horn antenna. The absorption characteristics of the absorber were measured using a high gain horn, and there were ±1.7 dB differences in the results. It was shown that the proposed method was suitable for measuring the absorption characteristics of the absorber in the ETC system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ETC / Metal plate lens / Geometrical optics / Focal point length / Half power beam width / Gain |
| Paper # | PN2011-61,OPE2011-177,LQE2011-163,EST2011-111,MWP2011-79 |
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| Conference Information | |
| Committee | MWP |
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| Conference Date | 2012/1/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Microwave and Millimeter-wave Photonics (MWP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Measurement Method for Wave Absorber Constructed on Ceiling of the ETC Gate |
| Sub Title (in English) | |
| Keyword(1) | ETC |
| Keyword(2) | Metal plate lens |
| Keyword(3) | Geometrical optics |
| Keyword(4) | Focal point length |
| Keyword(5) | Half power beam width |
| Keyword(6) | Gain |
| 1st Author's Name | Nayuta KAMIYA |
| 1st Author's Affiliation | Department of Electrical Engineering and Electronics, College of Science and Engineering, Aoyama Gakuin University() |
| 2nd Author's Name | Takenori YASUZUMI |
| 2nd Author's Affiliation | Department of Electrical Engineering and Electronics, College of Science and Engineering, Aoyama Gakuin University |
| 3rd Author's Name | Yukinori MATSUSITA |
| 3rd Author's Affiliation | Nippon Expressway Research Institute Co.,Ltd. |
| 4th Author's Name | Yasuyuki MATSUDA |
| 4th Author's Affiliation | Nippon Expressway Research Institute Co.,Ltd. |
| 5th Author's Name | Osamu HASHIMOTO |
| 5th Author's Affiliation | Department of Electrical Engineering and Electronics, College of Science and Engineering, Aoyama Gakuin University |
| Date | 2012-01-27 |
| Paper # | PN2011-61,OPE2011-177,LQE2011-163,EST2011-111,MWP2011-79 |
| Volume (vol) | vol.111 |
| Number (no) | 416 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |