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245 GHz SiGe Sensor System for Gas Spectroscopy

Schmalz, K. and Wang, R. and Gulan, H. and Borngräber, J. and Neumaier, Philipp F.-X. and Hübers, Heinz-Wilhelm (2015) 245 GHz SiGe Sensor System for Gas Spectroscopy. International Journal of Microwave and Wireless Technologies. Cambidge University Press. ISSN 1759-0787

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Abstract

A 245 GHz sensor system for gas spectroscopy is presented, which includes a SiGe receiver (RX), a SiGe transmitter (TX), and a 0.6 m long gas absorption cell between the TX and RX. The integrated local oscillators of the RX and the TX are controlled by two external PLLs, whose reference frequencies are swept with constant frequency offset for a low IF of the RX. The RX consists of a differential LNA, an integrated 122 GHz local oscillator with 1/64 divider, a 90° differential hybrid, and active subharmonic mixer. The TX consists of an integrated 122 GHz local oscillator with 1/64 divider, and a frequency doubler. The RX and TX are fabricated in 0.13 µm SiGe BiCMOS with ft/fmax of 300GHz/500GHz. Using external dielectric lenses for the TX and RX, the absorption spectrum of gaseous methanol has been measured. The reference frequency of the TX-PLL is modulated for frequency-modulation spectroscopy. The performance of the sensor system is demonstrated by measuring the 2f absorption spectrum (second harmonic detection) of gaseous methanol.

Item URL in elib:https://elib.dlr.de/94026/
Document Type:Article
Title:245 GHz SiGe Sensor System for Gas Spectroscopy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmalz, K.IHP Frankfurt, OderUNSPECIFIED
Wang, R.IHP Frankfurt, OderUNSPECIFIED
Gulan, H.KIT, KarlsruheUNSPECIFIED
Borngräber, J.IHP Frankfurt, OderUNSPECIFIED
Neumaier, Philipp F.-X.philipp.neumaier (at) dlr.deUNSPECIFIED
Hübers, Heinz-Wilhelmheinz-wilhelm.huebers (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:International Journal of Microwave and Wireless Technologies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:Cambidge University Press
ISSN:1759-0787
Status:Published
Keywords:Millimeter-Waves, Terahertz, Gas, Spectroscopy, Gas-Sensor, 245 GHz, Receiver, Transmitter, SiGe, LNA, VOC, PLL, Methanol, FM Spectroscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - Optimode (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems
Deposited By: Neumaier, Philipp
Deposited On:06 Jan 2015 10:02
Last Modified:06 Sep 2019 15:20

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