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Sideband separating mixer for 600-720 GHz

Khudchenko, Andrey and Hesper, Ronald and Baryshev, Andrey and Gerlofma, Gerrit and Mena, Patricio and Zijlstra, Tony and Klapwijk, Teun and Spaans, Marco and Kooi, Jacob W. (2010) Sideband separating mixer for 600-720 GHz. In: Infrared, Millimeter Wave, and Terahertz Technologies. Proceedings of SPIE. No.7854. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 78542R. ISBN 978-0-8194-8384-3.

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The ALMA Band 9 receiver cartridge (600-720 GHz) based on Dual Sideband (DSB) superconductor-insulatorsuperconductor (SIS) mixer is currently in full production. In the case of spectral line observations, the integration time to reach a certain signal-to-noise level can be reduced by about a factor of two by rejecting an unused sideband. The goal is to upgrade the current ALMA band 9 cartridge to a full dual-polarization sideband separating (2SB) capability, with minimal-cost upgrade path. A new compact and modular sideband separating mixer was designed, and a prototype manufactured. The individual SIS mixer devices in the 2SB block are implemented as conventional Band 9 DSB mixers, so that existing devices can be reused and tested individually. Any ALMA DSB developments contribute to the 2SB upgrade. The first experimental results demonstrate noise temperature from 300K to 500K over 80% of the band, which will be improved to fit the ALMA requirements. Nevertheless, the frequency response for 2SB is the same as for DSB, showing that the RF design is still valid, even with different SIS mixer devices. The quality of the RF and IF design is confirmed by a sideband rejection ratio of about 15 dB, which is within the ALMA spec (>10dB ).

Item Type:Book Section
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Kooi, Jacob W.0000-0002-6610-0384
Additional Information:© 2010 SPIE. The authors thank Joost Adema for help with organizing of the experiment. This effort/activity is supported in part: by the European Community Framework Program 7, Advanced Radio Astronomy in Europe, grant agreement no. 227290; Dutch NWO/STW VENI Grant 08119, "Advanced Heterodyne Mixers for THz Applications", Dutch research school for astronomy (NOVA) NOVAIII grant.
Funding AgencyGrant Number
European Research Council (ERC)227290
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)08119
Netherlands Research School for Astronomy (NOVA)UNSPECIFIED
Subject Keywords:Sideband separating mixers, Submillimeter mixers, ALMA band 9, superconductor-insulator-superconductor junction
Series Name:Proceedings of SPIE
Issue or Number:7854
Record Number:CaltechAUTHORS:20161028-142832775
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Official Citation:Andrey Khudchenko ; Ronald Hesper ; Andrey Baryshev ; Gerrit Gerlofma ; Patricio Mena ; Tony Zijlstra ; Teun Klapwijk ; Marco Spaans ; Jacob W. Kooi; Sideband separating mixer for 600-720 GHz. Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542R (November 04, 2010); doi:10.1117/12.869594
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71586
Deposited By: Tony Diaz
Deposited On:28 Oct 2016 21:49
Last Modified:09 Mar 2020 13:18

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