| Presentation | 2002/10/4 A Tennis-court-sized Reflector for Communication Satellites : Use for Engineering Test Satellite VIII Akihiro MIYASAKA, Kyoji SHINTATE, Akio TSUJIHATA, Yuji TSUTSUMI, Makoto YOSHIHARA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Large deployable reflector (LDR) is state-of-the-arts technology in communication satellites to achieve some satellite communication services. Government agencies of Japan are planning some experiments on communication and broadcasting services via satellites. Engineering Test Satellite VIII (ETS-VIII) will be launched in 2004, and demonstrated satellite voice communication by using cellular phones and high-quality audio broadcasting. An antenna system is a combination of the LDR and active-phased-array feeders. The LDR, 20 m along its major axis, based on a modular-mesh concept in which structure consists of several basic modules has extensibility. In order to develop the LDR, the design points on surface accuracy and electrical performance are evaluated. A surface error caused by the assembly of multiple modules was evaluated. The surface accuracy measured data compared with analysis results. Hence, the surface of the LDR was accurate enough within the system requirement. The electrical performance, especially, passive intermodulation (PIM) was measured by using a 7-module reflector. The measured PIM is so small that the LDR is satisfied the system requirements. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Large deployable reflector / LDR / Engineering Test Satellite VIII / Reflector / Deployment / PIM |
| Paper # | SAT2002-84 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2002/10/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Satellite Telecommunications (SAT) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Tennis-court-sized Reflector for Communication Satellites : Use for Engineering Test Satellite VIII |
| Sub Title (in English) | |
| Keyword(1) | Large deployable reflector |
| Keyword(2) | LDR |
| Keyword(3) | Engineering Test Satellite VIII |
| Keyword(4) | Reflector |
| Keyword(5) | Deployment |
| Keyword(6) | PIM |
| 1st Author's Name | Akihiro MIYASAKA |
| 1st Author's Affiliation | National Space Development Agency of JAPAN() |
| 2nd Author's Name | Kyoji SHINTATE |
| 2nd Author's Affiliation | National Space Development Agency of JAPAN |
| 3rd Author's Name | Akio TSUJIHATA |
| 3rd Author's Affiliation | National Space Development Agency of JAPAN |
| 4th Author's Name | Yuji TSUTSUMI |
| 4th Author's Affiliation | NEC TOSHIBA Space Systems, Ltd |
| 5th Author's Name | Makoto YOSHIHARA |
| 5th Author's Affiliation | NEC TOSHIBA Space Systems, Ltd |
| Date | 2002/10/4 |
| Paper # | SAT2002-84 |
| Volume (vol) | vol.102 |
| Number (no) | 360 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |