Design and Performance of a 600–720-GHz Sideband-Separating Receiver Using ${\hbox{AlO}}_{x}$ and AlN SIS Junctions

Mena, F. P.; Kooi, J.; Baryshev, A.; Lodewijk, C. F. J.; Zijlstra, T.; Hesper, Ronald; Gerlofsma, G.; Klapwijk, T. M.; Wild, Wolfgang

doi:10.1109/tmtt.2010.2090417

Cited by 18 publications

(11 citation statements)

References 18 publications

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“…The AlO x barrier SIS devices are fabricated on a 200 µm thick quartz substrate Mena et al 2011;Zijlstra et al 2007). First, a sacrificial Nb monitor layer is deposited, followed by an optically defined trilayer of Nb/Al/AlO x /Nb.…”

Section: Sis Device Fabricationmentioning

confidence: 99%

“…Having only one IF channel per polarization, the IF system of Band 9 was designed to cover a range of 4-12 GHz instead of 4-8 GHz as in the 2SB bands. Improvements in micromachining techniques over the past few years now allow fabrication of 2SB receivers for these high frequencies as well (Mena et al 2011), and so they can be considered for future upgrading of the Band 9 receivers Khudchenko et al 2011Khudchenko et al , 2012.…”

Section: Introductionmentioning

confidence: 99%

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The ALMA Band 9 receiver

Baryshev

Hesper

Mena

et al. 2015

A&A

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Aims. We describe the design, construction, and characterization of the Band 9 heterodyne receivers (600-720 GHz) for the Atacama Large Millimeter/submillimeter Array (ALMA). First-light Band 9 data, obtained during ALMA commissioning and science verification phases, are presented as well. Methods. The ALMA Band 9 receiver units (so-called "cartridges"), which are installed in the telescope's front end, have been designed to detect and down-convert two orthogonal linear polarization components of the light collected by the ALMA antennas. The light entering the front end is refocused with a compact arrangement of mirrors, which is fully contained within the cartridge. The arrangement contains a grid to separate the polarizations and two beam splitters to combine each resulting beam with a local oscillator signal. The combined beams are fed into independent double-sideband mixers, each with a corrugated feedhorn coupling the radiation by way of a waveguide with backshort cavity into an impedance-tuned superconductor-insulator-superconductor (SIS) junction that performs the heterodyne down-conversion. Finally, the generated intermediate frequency (IF) signals are amplified by cryogenic and room-temperature HEMT amplifiers and exported to the telescope's IF back end for further processing and, finally, correlation. Results. The receivers have been constructed and tested in the laboratory and they show an excellent performance, complying with ALMA requirements. Performance statistics on all 73 Band 9 receivers are reported. Importantly, two different tunnel-barrier technologies (necessitating different tuning circuits) for the SIS junctions have been used, namely conventional AlO x barriers and the more recent high-current-density AlN barriers. On-sky characterization and tests of the performance of the Band 9 cartridges are presented using commissioning data. Continuum and line images of the low-mass protobinary IRAS 16293-2422 are presented which were obtained as part of the ALMA science verification program. An 8 GHz wide Band 9 spectrum extracted over a 0.3 × 0.3 region near source B, containing more than 100 emission lines, illustrates the quality of the data.

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Section: Sis Device Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The ALMA Band 9 receiver

Baryshev

Hesper

Mena

et al. 2015

A&A

Self Cite

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“…2 the proposed low VSWR topology is shown with the IF LNA's included in the IF IQpaths. Using a similar convention as [5], the ideal process of subharmonic down conversion from the RF port to the IF I and Q ports can be described by expressing the downconverted IF voltages v IF,I and v IF,Q at the respective I and Q ports:…”

Section: A Sideband Separating Topologymentioning

confidence: 99%

“…Recent improvements in semiconductor fabrication, circuit processing and high precision machining technology, has led to an increased repeatability and enhanced component performance and made it possible to make integrated sideband separating THz receivers. With the rapid development of novel micromachining techniques, the performance of these systems is constantly improving and state-of-the-art superconductorisolator-superconductor (SIS) and hot electron bolometer (HEB), 2SB and balanced receivers [4][5][6], can now be found operating at frequencies around 1 THz. However, the development of integrated 2SB heterodyne receiver topologies has so far been exclusively done for cryogenic applications, leading to a technological gap for room temperature Schottky diode based applications.…”

Section: Introductionmentioning

confidence: 99%

A Low VSWR 2SB Schottky Receiver

Sobis

Emrich

Stake

2011

IEEE Trans. THz Sci. Technol.

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A novel high performance waveguide integrated sideband separating (2SB) Schottky receiver operating in the 320-360 GHz band is presented. The unique receiver design is based on a core of two subharmonic Schottky diode mixers with embedded LNA's with a minimum noise figure of 1.8 dB, fed by LO and RF quadrature hybrids. At room temperature, a typical receiver SSB noise temperature of 3000 K is measured over most of the band reaching a minimum of 2700 K, with only 4 mW of LO power. The sideband ratio SBR is typically below 15 dB over the whole band and the measured LO input return loss is typically below 15 dB broadband. High performance sideband separating Schottky receivers can now for the first time be considered for submillimeter wave systems enabling new types of instrument concepts.

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“…Alternatively, the RF filters and mixers can also be replaced by a sideband separating mixer configuration. 29 A single high frequency local oscillator is used to avoid the use of harmonic mixers with high conversion loss. Subject to the application, an attenuated signal of the gyrotron source for ECRH could be used as a LO.…”

Section: Front-end Setupmentioning

confidence: 99%

Intermediate frequency band digitized high dynamic range radiometer system for plasma diagnostics and real-time Tokamak control

Bongers

Beveren

Thoen

et al. 2011

Review of Scientific Instruments

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. An intermediate frequency (IF) band digitizing radiometer system in the 100-200 GHz frequency range has been developed for Tokamak diagnostics and control, and other fields of research which require a high flexibility in frequency resolution combined with a large bandwidth and the retrieval of the full wave information of the mm-wave signals under investigation. The system is based on directly digitizing the IF band after down conversion. The enabling technology consists of a fast multi-giga sample analog to digital converter that has recently become available. Field programmable gate arrays (FPGA) are implemented to accomplish versatile real-time data analysis. A prototype system has been developed and tested and its performance has been compared with conventional electron cyclotron emission (ECE) spectrometer systems. On the TEXTOR Tokamak a proof of principle shows that ECE, together with high power injected and scattered radiation, becomes amenable to measurement by this device. In particular, its capability to measure the phase of coherent signals in the spectrum offers important advantages in diagnostics and control. One case developed in detail employs the FPGA in real-time fast Fourier transform (FFT) and additional signal processing. The major benefit of such a FFT-based system is the real-time trade-off that can be made between frequency and time resolution. For ECE diagnostics this corresponds to a flexible spatial resolution in the plasma, with potential application...

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Design and Performance of a 600–720-GHz Sideband-Separating Receiver Using ${\hbox{AlO}}_{x}$ and AlN SIS Junctions

Cited by 18 publications

References 18 publications

The ALMA Band 9 receiver

The ALMA Band 9 receiver

A Low VSWR 2SB Schottky Receiver

Intermediate frequency band digitized high dynamic range radiometer system for plasma diagnostics and real-time Tokamak control

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