Title :
245 GHz transmitter and receiver in SiGe for gas spectroscopy
Author :
Schmalz, K. ; Neumaier, P. ; Borngraber, Johannes ; Debski, W. ; Hubers, Heinz-Wilhelm
Author_Institution :
IHP, Frankfurt (Oder), Germany
Abstract :
A 245 GHz sensor system for gas spectroscopy is presented, which includes a SiGe transmitter (TX) and a receiver (RX). The integrated local oscillators of TX- and RX-chips are controlled by two external phase-locked loops (PLL), whose reference frequencies are swept with constant frequency offset. The reference frequency of the TX-PLL is modulated for frequency-modulation spectroscopy. The performance of the sensor system is demonstrated by the 2f absorption spectrum (second harmonic detection) of methanol.
Keywords :
Ge-Si alloys; frequency modulation; gas sensors; millimetre wave spectroscopy; oscillators; phase locked loops; PLL; SiGe; absorption spectrum; frequency 245 GHz; frequency-modulation spectroscopy; gas spectroscopy; local oscillators; methanol; phase-locked loops; receiver; second harmonic detection; sensor system; transmitter; Absorption; Frequency modulation; Gain; Phase locked loops; Silicon germanium; Spectroscopy; Transmitters;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956428
