| タイトル | Proposed Ka-band array-fed near field Cassegrain system for NASA's Polar Probe Mission |
| 著者（英） | Vacchione, J.; Kapoor, V.; Kellogg, K.; Komarek, T.; Randolph, J.; Rascoe, D.; Crist, R. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1992-01-01 |
| 言語 | eng |
| 内容記述 | A Ka-band array-fed near-field Cassegrain antenna envisioned for NASA's Solar Probe Mission is the basis of the present spacecraft telecommunications system, which is designed for operation at X-band up/downlink and Ka-band downlink. The hexagonal array employed, which is located at the Cassegrain point of the 0.75-m reflector, encompasses 37 active elements; each of these contains 1/4-W HEMT amplifiers. Relative to a TWTA-based system, this active array feed reduces mass, increases dc power efficiency, enhanced reliability, and reduces volume requirements. |
| NASA分類 | SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING |
| レポートNO | 92A29931
AIAA PAPER 92-2012 |
| 権利 | Copyright |
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