A Technology Demonstrator for 1.6–2.0 THz Waveguide HEB Receiver with a Novel Mixer Layout

Dochev, D; Desmaris, Vincent; Meledin, Denis; Pavolotsky, Alexey; Belitsky, Victor

doi:10.1007/s10762-011-9774-9

Cited by 13 publications

(13 citation statements)

References 21 publications

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“…In this paper, we present a complete waveguide packaging technology suitable for frequencies up to 5000 GHz, combining all-metal THz waveguide technology [3] based on micromachining, for ultimate waveguide quality and a novel chip layout forming a Π-frame made of SOI structure [4], supporting the active devices on a thin cross beam, for simple, fast and accurate chip positioning.…”

Section: Introductionmentioning

confidence: 99%

Terahertz components packaging using integrated waveguide technology

Desmaris

Meledin

Dochev

et al. 2011

2011 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Integration Technologies

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We present an integrated waveguide based packaging solution compatible with different THz component technologies, both for room temperature and cryogenic operations , employing space-qualified wire-bonding for electrical contacts. The proposed waveguide packaging relies on the combination of all-metal micro-machined THz waveguide and active component chip layouts suitable for the realization of systems from 200 up to 5000 GHz. It provides possibility of making 3-dimensional structures via facilitating of multi-level (layered) designs. The surface roughness of the fabricated THz waveguide structure was demonstrated to be 20 nm, while a 2 μm alignment accuracy of the active component chip was verified.

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Section: Introductionmentioning

confidence: 99%

Terahertz components packaging using integrated waveguide technology

Desmaris

Meledin

Dochev

et al. 2011

2011 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Integration Technologies

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“…We expect that this effect should significantly decrease the sensitivity of receivers employing HEB mixers, e.g. for frequencies above 1.4 THz where these devices are the heterodyne mixers of choice and where only few balanced mixers were realized to date 29,30 .…”

Section: Discussionmentioning

confidence: 99%

A 490 GHz planar circuit balanced Nb-Al2O3-Nb quasiparticle mixer for radio astronomy: Application to quantitative local oscillator noise determination

Westig

Justen

Jacobs

et al. 2012

Journal of Applied Physics

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This article presents a heterodyne experiment which uses a 380-520 GHz planar circuit balanced Nb-Al 2 O 3 -Nb superconductor-insulator-superconductor (SIS) quasiparticle mixer with 4-8 GHz instantaneous intermediate frequency (IF) bandwidth to quantitatively determine local oscillator (LO) noise. A balanced mixer is a unique tool to separate noise at the mixer's LO port from other noise sources. This is not possible in singleended mixers. The antisymmetric IV characteristic of a SIS mixer further helps to simplify the measurements. The double-sideband receiver sensitivity of the balanced mixer is 2-4 times the quantum noise limit hν/k B over the measured frequencies with a maximum LO noise rejection of 15 dB. This work presents independent measurements with three different LO sources that produce the reference frequency but also an amount of near-carrier noise power which is quantified in the experiment as a function of the LO and IF frequency in terms of an equivalent noise temperature T LO . Two types of LO sources are used: a synthesizer driven amplifier/multiplier chain and a Gunn oscillator driven multiplier chain. With the first type of LO we find different near-carrier noise contributions using two different power pre-amplifiers of the LO system. For one of the two power pre-amplifiers we measure T LO = 30 ± 4 K at the LO frequency 380 GHz and T LO = 38 ± 10 K at 420 GHz. At the frequency band center 465 GHz of the Gunn driven LO we measure a comparable value of T LO = 32 ± 6 K. For the second power pre-amplifier a significant higher T LO value of the synthesizer driven LO is found which is up to six times larger compared with the best values found for the Gunn driven LO. In a second experiment we use only one of two SIS mixers of the balanced mixer chip in order to verify the influence of near-carrier LO noise power on a single-ended heterodyne mixer measurement. We find an IF frequency dependence of near-carrier LO noise power. The frequency-resolved IF noise temperature slope is flat or slightly negative for the single-ended mixer. This is in contrast to the IF slope of the balanced mixer itself which is positive due to the expected IF roll-off of the mixer. This indicates a higher noise level closer to the LO's carrier frequency. Our findings imply that near-carrier LO noise has the largest impact on the sensitivity of a receiver system which uses mixers with a low IF band, for example superconducting hot-electron bolometer (HEB) mixers.

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“…In 2008, they succeeded in observing the CO J = 11 → 10 line toward the AGB star CW Leo with this SHeFI receiver installed in the Atacama Pathfinder Exper-iment (APEX) telescope located at Liano de Chajnantor in Northern Chile (at an altitude of 5105 m). They also developed a balance waveguide HEB mixer for the 1.6-2.0 THz band [34]. The mixer block is composed of corrugated horns for RF and LO signals, a waveguide 3-dB 90…”

Section: Mixer Mount Designmentioning

confidence: 99%

Application of Superconducting Hot-Electron Bolometer Mixers for Terahertz-Band Astronomy

Maezawa

2015

IEICE Trans. Electron.

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SUMMARY Recently, a next-generation heterodyne mixer detectora hot electron bolometer (HEB) mixer employing a superconducting microbridge-has gradually opened up terahertz-band astronomy. The surrounding state-of-the-art technologies including fabrication processes, 4 K cryostats, cryogenic low-noise amplifiers, local oscillator sources, micromachining techniques, and spectrometers, as well as the HEB mixers, have played a valuable role in the development of super-low-noise heterodyne spectroscopy systems for the terahertz band. The current developmental status of terahertz-band HEB mixer receivers and their applications for spectroscopy and astronomy with ground-based, airborne, and satellite telescopes are presented.

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A Technology Demonstrator for 1.6–2.0 THz Waveguide HEB Receiver with a Novel Mixer Layout

Cited by 13 publications

References 21 publications

Terahertz components packaging using integrated waveguide technology

Terahertz components packaging using integrated waveguide technology

A 490 GHz planar circuit balanced Nb-Al2O3-Nb quasiparticle mixer for radio astronomy: Application to quantitative local oscillator noise determination

Application of Superconducting Hot-Electron Bolometer Mixers for Terahertz-Band Astronomy

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