Performance of the First ALMA Band 5 Production Cartridge
Artikel i vetenskaplig tidskrift, 2012

We present performance of the first ALMA Band 5 production cartridge, covering frequencies from 163 GHz to 211 GHz. ALMA Band 5 is a dual polarization, sideband separation (2SB) receiver based on all Niobium (Nb) Superconductor-Insulator-Superconductor (SIS) tunnel junction mixers, providing 16 GHz of instantaneous RF bandwidth for astronomy observations. The 2SB mixer for each polarization employs a quadrature configuration. The sideband separation occurs at the output of the IF hybrid that has integrated bias-T for biasing the mixers, and is produced using superconducting thin film technology. Experimental verification of the Band 5 cold cartridge performed together with warm cartridge assembly, confirms that the system noise temperature is below 45 K over most of the RF band, which is less than five photon noise (5 hf/k). This is to our knowledge, the best results reported at these frequencies. The measurement of the sideband rejection indicates that the sideband rejection better than 10 dB over 90% of the observational band.

thin-film circuits.

terahertz system

superconductor-insulator-superconductor (SIS) mixers

millimeter-wave mixers

superconducting devices

astronomy instruments

Atacama Large Millimeter/sub-millimeter Array (ALMA)

Författare

Bhushan Billade

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Olle Nyström

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Denis Meledin

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Erik Sundin

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Igor Lapkin

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Mathias Fredrixon

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Vincent Desmaris

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Hawal Marouf Rashid

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Magnus Strandberg

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Sven-Erik Ferm

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Alexey Pavolotskiy

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Victor Belitsky

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

IEEE Transactions on Terahertz Science and Technology

2156-342X (ISSN)

Vol. 2 208-214 6153417

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/TTHZ.2011.2182220