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

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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.

Original languageEnglish
Title of host publication2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
PublisherIEEE
Pages1-2
Number of pages2
ISBN (Electronic)978-1-5386-8285-2
ISBN (Print)978-1-5386-8286-9
DOIs
Publication statusPublished - 2019
Event44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 - Paris, France
Duration: 1 Sep 20196 Sep 2019

Conference

Conference44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019
CountryFrance
CityParis
Period1/09/196/09/19

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