학술논문
THz Instrumentation for the Herschel Space Observatory's Heterodyne Instrument for Far Infrared
Document Type
Report
Author
Pearson, J. C; Mehdi, I; Ward, J. S; Maiwald, F; Ferber, R. R; Leduc, H. G; Schlecht, E. T; Gill, J. J; Hatch, W. A; Kawamura, J. H; Stern, J. A; Gaier, T. C; Samoska, L. A; Weinreb, S; Bumble, B; Pukala, D. M; Javadi, H. H; Finamore, B. P; Lin, R. H; Dengler, R. J; Velebir, J. R; Luong, E. M; Tsang, R; Peralta, A; Wells, M
Source
Subject
Language
English
Abstract
The Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory utilizes a variety of novel RF components in its five SIS receiver channels covering 480-1250 GHz and two HEB receiver channels covering 1410-1910 GHz. The local oscillator unit will be passively cooled while the focal plane unit is cooled by superfluid helium and cold helium vapors. HIFI employs W-band GaAs amplifiers, InP HEMT low noise IF amplifiers, fixed tuned broadband planar diode multipliers, high power W-bapd Isolators, and novel material systems in the SIS mixers. The National Aeronautics and Space Administration through the Jet Propulsion Laboratory is managing the development of the highest frequency (1119-1250 GHz) SIS mixers, the local oscillators oscillators for the three highest frequency receivers as well as W-band power amplifiers, high power W-band isolators, varactor diode devices for all high frequency multipliers and InP HEMT components for all the receiver channels intermediate frequency amplifiers. The NASA developed components represent a significant advancement in the available performance. This paper presents an update of the performance and the current state of development.