Title :
245 GHz SiGe Transmitter Array for Gas Spectroscopy
Author :
Schmalz, K. ; Borngraber, Johannes ; Debski, W. ; Elkhouly, Mohamed ; Ruoyu Wang ; Neumaier, P. ; Hubers, Heinz-Wilhelm
Author_Institution :
IHP, Frankfurt (Oder), Germany
Abstract :
A 245 GHz transmitter (TX) array with an integrated antenna-array for a gas spectroscopy system has been realized, which consists of a push-push VCO with a 1/64 frequency divider, power amplifiers, frequency doublers, and on-chip antennas with localized backside etching. The TX-frequency is tunable in the range from 238 GHz to 252 GHz. The TX-array is fabricated in 0.13 μm SiGe:C BiCMOS technology with fT/fmax of 300GHz/500GHz. Its estimated output power is 7 dBm at 245 GHz, and the EIRP reaches 18 dBm at 245 GHz. The 245 GHz spectroscopy system includes a TX and a receiver in SiGe. The sensitivity of this spectroscopy system is demonstrated by the high-resolution absorption spectrum of methanol and will be increased further by this TX-array.
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; carbon; millimetre wave antenna arrays; millimetre wave integrated circuits; spectroscopy; BiCMOS technology; SiGe:C; TX array; frequency 238 GHz to 252 GHz; frequency 300 GHz; frequency 500 GHz; frequency divider; frequency doublers; gas spectroscopy system; high-resolution absorption spectrum; integrated antenna-array; localized backside etching; methanol; on-chip antennas; power amplifiers; push-push VCO; receiver; sensitivity; size 0.13 mum; transmitter array; Antenna arrays; Arrays; Frequency conversion; Power amplifiers; Power generation; Silicon germanium; Spectroscopy;
Conference_Titel :
Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE
Conference_Location :
La Jolla, CA
DOI :
10.1109/CSICS.2014.6978525
