| Presentation | 2001/7/19 A Study on the Intermodulation Products of Phased-array TWTs for Broadcasting Satellites Hitoshi NAKAGAWA, Masashi KAMEI, Toshihiro NOMOTO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The intermodulation products(IMPs) and the influence on the radiation pattern due to the non-linearity of TWTs used as array amplifiers for phased-array antenna for 21-GHz band broadcasting satellites have been studied. The amplitude and phase of fundamentals and IMPs with two-carrier input were calculated by means of DFT and compared with measured results. Basic calculation parameters were derived from the amplitude and phase characteristics measured in single-carrier operation. The results showed good agreement and revealed that the phase shift of IMP was much larger than that of the fundamental. For example, phase shifts from -10 dB input-back-off to the saturation were -31, -51 and -58 degs.for the fundamental, IM3 and IM5, respectively. The array factor of linear-array equipped with TWTs was calculated by means of the method. The difference of patterns for the fundamental and IMP was illustrated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | TWT / Intermodulation / Broadcasting satellite / 21GHz-band / Phased-array |
| Paper # | SAT2001-36 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2001/7/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Satellite Telecommunications (SAT) |
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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 the Intermodulation Products of Phased-array TWTs for Broadcasting Satellites |
| Sub Title (in English) | |
| Keyword(1) | TWT |
| Keyword(2) | Intermodulation |
| Keyword(3) | Broadcasting satellite |
| Keyword(4) | 21GHz-band |
| Keyword(5) | Phased-array |
| 1st Author's Name | Hitoshi NAKAGAWA |
| 1st Author's Affiliation | NHK Science and Technical Research Laboratories() |
| 2nd Author's Name | Masashi KAMEI |
| 2nd Author's Affiliation | NHK Science and Technical Research Laboratories |
| 3rd Author's Name | Toshihiro NOMOTO |
| 3rd Author's Affiliation | NHK Science and Technical Research Laboratories |
| Date | 2001/7/19 |
| Paper # | SAT2001-36 |
| Volume (vol) | vol.101 |
| Number (no) | 219 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |