Molecular Spectroscopy With a Compact 557-GHz Heterodyne Receiver
Journal article, 2014
We report on a heterodyne terahertz spectrometer based on a fully integrated 557-GHz receiver and a digital fast Fourier transform spectrometer. The receiver consists of a chain of multipliers and power amplifiers, followed by a heterostructure barrier varactor tripler that subharmonically pumps a membrane GaAs Schottky diode mixer. All sub-components are newly developed and optimized with regard to the overall receiver performance such as noise temperature, power consumption, weight and physical size. The receiver works at room temperature, has a double sideband noise temperature as low as 2000 K at a maximum power consumption of 4.5 W with an Allan time of 10 s and a sideband gain ratio of 0.52. The performance of the spectrometer is demonstrated by absorption spectroscopy of H2O and CH3OH with an instantaneous bandwidth of 1.5 GHz and a resolution of 183 kHz. Several pressure broadening parameters of methanol absorption lines were determined, that agree with other published data. Using the experimentally determined molecular parameters the CH3OH absorption spectrum could be modeled with very high precision.
heterostructure barrier varactors
MMICs
Schottky diode
heterodyne receiver
CH3OH
molecular spectroscopy
mHEMT
power amplifiers
terahertz
methanol
Author
[Person f2a2b8a0-f70a-4fec-996d-8f6329f5bf06 not found]
German Aerospace Center (DLR)
[Person 07d8b29d-81a3-4994-b9ca-c58b24d822d6 not found]
German Aerospace Center (DLR)
[Person e4e95a51-4839-444a-9dca-a5b5dab31233 not found]
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
GigaHertz Centre
[Person 70b416d5-ff2b-4906-97c6-d0338d5adc93 not found]
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
[Person 1868bdcf-90ed-4497-9b44-465074fe5019 not found]
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
GigaHertz Centre
[Person 172210b6-0d31-4648-beb8-8d9868478bec not found]
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
[Person 9261c8e3-75a3-4df0-934c-d6a6fd5f6691 not found]
GigaHertz Centre
[Person bd88fad1-1fbd-47c1-b1ab-15d405586035 not found]
Omnisys Instruments
[Person 6f20a965-907e-4482-bf42-5a2208b9bfa3 not found]
Fraunhofer-Institut fur Angewandte Festkorperphysik - IAF
[Person 9d8f3183-5c37-474f-9d26-1e8d25edad15 not found]
Technical University of Denmark (DTU)
[Person 71943b8f-f239-43b4-bfdf-9c5f9260169f not found]
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
GigaHertz Centre
[Person 4832cd4b-584f-47ca-97a4-267eb8616b25 not found]
GigaHertz Centre
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
[Person 166bc0d5-d919-41a7-b420-f032e3a50af1 not found]
Goethe University Frankfurt
Ferdinand-Braun-Institut fur Hochstfrequenztechnik
[Person 6c93d70a-1901-410e-8448-ee32abdd8745 not found]
German Aerospace Center (DLR)
Technische Universität Berlin
IEEE Transactions on Terahertz Science and Technology
2156-342X (ISSN) 21563446 (eISSN)
Vol. 4 4 469-478 6825917Areas of Advance
Information and Communication Technology
Driving Forces
Sustainable development
Innovation and entrepreneurship
Subject Categories
Atom and Molecular Physics and Optics
Other Electrical Engineering, Electronic Engineering, Information Engineering
Infrastructure
Nanofabrication Laboratory
DOI
10.1109/TTHZ.2014.2326554