Sideband separating mixer for 600-720 GHz for ALMA band 9 upgrade

Andrey Khudchenko; Ronald Hesper; Andrey Baryshev; Gerrit Gerlofma; Jan Barkhof; Joost Adema; Patricio Mena; Teun Klapwijk; Marco Spaans

doi:10.1117/12.927285

24 September 2012 Sideband separating mixer for 600-720 GHz for ALMA band 9 upgrade

Andrey Khudchenko, Ronald Hesper, Andrey Baryshev, Gerrit Gerlofma, Jan Barkhof, Joost Adema, Patricio Mena, Teun Klapwijk, Marco Spaans

Author Affiliations +

Proceedings Volume 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI; 845214 (2012) https://doi.org/10.1117/12.927285
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

For high-frequency observational bands like ALMA (Atacama Large Millimeter Array) Band 9 (600—720 GHz), which tend to be dominated by atmospheric noise, implementation of sideband-separating mixers can reduce, up to a factor of two, the integration time needed to reach a certain signal-to-noise ratio for spectral line observations. Because of very high oversubscription factor for observation in ALMA Band 9, an upgrade of the current Double Sideband (DSB) mixer to a Two Sideband (2SB) configuration is a promising option for future ALMA development. Here we present a developed 2SB mixer and a modified cartridge design. The 2SB mixer includes a waveguide RF hybrid block, which have been produced on a micro-milling machine and equipped with standard Band 9 SIS mixer devices. These two SIS mixers have been separately tested in DSB mode. The SSB noise temperature is within the ALMA requirements of 336 K over 80% of the band, and 500 K over the entire band. The 2SB mixer has the sideband rejection ratio better than 12 dB over the full RF band, which is also well within the ALMA specifications of 10 dB.

Citation Download Citation

Andrey Khudchenko, Ronald Hesper, Andrey Baryshev, Gerrit Gerlofma, Jan Barkhof, Joost Adema, Patricio Mena, Teun Klapwijk, and Marco Spaans "Sideband separating mixer for 600-720 GHz for ALMA band 9 upgrade", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845214 (24 September 2012); https://doi.org/10.1117/12.927285

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available