31 July 1998 Array receiver development at KOSMA for the sub-millimeter and terahertz spectral range
Author Affiliations +
Abstract
We describe frontend concepts for the future heterodyne array instruments of the KOSMA 3-m telescope and for SOFIA. For KOSMA we are currently developing a dual frequency (400 - 500, 800 - 900 GHz) SIS mixer array of four elements per frequency band. For SOFIA, we are planning an up to 4 X 4 element array for 1.6 - 2.0 THz using superconducting hot-electron bolometers. The small number of pixels allows us to keep the optics relatively compact. For the same reason, a single sideband filter is not included. The local oscillator power will be distributed using Dammann gratings. Motivated by the excellent beam characteristics of waveguide horns we are planning to extend the range of our waveguide mixers to 2 THz. The mixers are based on the wideband tunerless mixers that have been successfully used in single element telescope receivers at KOSMA. The mixers will be standard building blocks mounted at the back of waveguide horns integrated into the optical setup. Local oscillators for 400 - 900 GHz are solid state sources, for the Terahertz array we are developing several alternative local oscillator concepts.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Urs U. Graf, Urs U. Graf, S. Haas, S. Haas, C. E. Honingh, C. E. Honingh, K. Jacobs, K. Jacobs, Rudolf T. Schieder, Rudolf T. Schieder, Juergen Stutzki, Juergen Stutzki, } "Array receiver development at KOSMA for the sub-millimeter and terahertz spectral range", Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); doi: 10.1117/12.317351; https://doi.org/10.1117/12.317351
PROCEEDINGS
8 PAGES


SHARE
RELATED CONTENT

SOFIA terahertz array receiver (STAR)
Proceedings of SPIE (June 19 2000)
STAR: SOFIA terahertz array receiver
Proceedings of SPIE (March 02 2003)
1.4-THz receiver for APEX and for GREAT on SOFIA
Proceedings of SPIE (October 07 2004)

Back to Top