Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.arcetri.astro.it/~nesti/pdfs/almadp5n.pdf Дата изменения: Wed Nov 27 09:55:04 2002 Дата индексирования: Tue Oct 2 08:39:53 2012 Кодировка:

ALMA
100 GHz dual-profiled horn design (5n) - date 11/2002 Goals:
1. 2. 3. 4. Frequency: 100 GHz Bandwidth: 84 GHz ­ 116 GHz Cross-polar level: <-30 dB Return loss: >30 dB

Notes:
· Horn length improved (25% less than previous) · Waist closer to the aperture

Horn profile and phase centre location (PCL):


20dB taper weighted phase centre:

Return loss (-S11[dB]) and cross-polar level:


Beam waist (w0):

Feed pattern (FP) Vs best fit gaussian beam (BFGB)(45°):


Gaussian beam efficiency:

Best-fit gaussian beam efficiency: