Quasi-Optical System for the ASTE Telescope with 1:3 Bandwidth at Sub-mm Wave

Conference paper (2019)

Authors

Shahab Oddin Dabironezare Tera-Hertz Sensing - EEMCS
G. Carluccio Tera-Hertz Sensing - EEMCS
A. Pascual Laguna Tera-Hertz Sensing - EEMCS , SRON Netherlands Institute for Space Research
S.A. Hähnle Tera-Hertz Sensing - EEMCS , SRON Netherlands Institute for Space Research
J.J.A. Baselmans SRON Netherlands Institute for Space Research, Tera-Hertz Sensing - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2019 Shahab Oddin Dabironezare, G. Carluccio, A. Pascual Laguna, S.A. Hähnle, J.J.A. Baselmans, Nuria Llombart
DOI: https://doi.org/10.1109/IRMMW-THz.2019.8874065
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Published Date

2019

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

DESHIMA is a spectrometer for astronomical applications targeting sources at sub-mm wavelengths from 240GHz to 720GHz that will operate in the ASTE telescope in Atacama Desert, Chile. In this work, a quasi-optical system based on a hyper-hemispherical leaky lens antenna and a series of Dragonian reflectors is presented as the coupling chain for the EM radiation captured by the telescope into the detector. The design procedure is based on a field matching technique in reception. The achieved average illumination efficiency over the band is approximately 70%. The directivity patterns in the sky are also estimated. The side lobe, and cross-polarization levels, over the whole frequency band, are below-16dB, and-18dB, respectively. The measurement of the system is on-going, and will be presented at the conference.

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