期刊論文
| 學年 | 99 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2011-02-01 |
| 作品名稱 | 1.2 m Shielded Cassegrain Antenna for Close-Packed Radio Interferometer |
| 作品名稱（其他語言） | |
| 著者 | Koch, Patrick M.; Raffin, Philippe; Huang, Yau-de; Chen, Ming-tang; Han, Chih-chiang; Lin, Kai-yang; Altamirano, Pablo; Granet, Christophe; Paul, T.P.; Ho, Chih-wei; Huang, L.; Kesteven, Michael; Li, Chao-te; Liao, Yu-wei; Liu, Guo-chin; Nishioka, Hiroaki; Ong, Ching-long; Oshiro, Peter; Umetsu, Keiichi; Wang, Fu-cheng; Wu, Jiun-huei Proty |
| 單位 | 淡江大學物理學系 |
| 出版者 | Chicago: University of Chicago Press |
| 著錄名稱、卷期、頁數 | Publications of the Astronomical Society of the Pacific 123(900), pp.198-212 |
| 摘要 | Interferometric millimeter observations of the cosmic microwave background and clusters of galaxies with arcmin resolutions require antenna arrays with short spacings. Having all antennas co-mounted on a single steerable platform sets limits to the overall weight. A 25 kg lightweight novel carbon-fiber design for a 1.2 m diameter Cassegrain antenna is presented. The finite element analysis predicts excellent structural behavior under gravity, wind and thermal load. The primary and secondary mirror surfaces are aluminum coated with a thin TiO2 top layer for protection. A low beam sidelobe level is achieved with a Gaussian feed illumination pattern with edge taper, designed based on feedhorn antenna simulations and verified in a far field beam pattern measurement. A shielding baffle reduces inter-antenna coupling to below ∼ -135 dB. The overall antenna efficiency, including a series of efficiency factors, is estimated to be around 60%, with major losses coming from the feed spillover and secondary blocking. With this new antenna, a detection rate of about 50 clusters per year is anticipated in a 13-element array operation. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0004-6280; 1538-3873 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/77250 ) |