NDLI: Tunable 245 GHz transmitter and receiver in SiGe technology for gas spectroscopy

Content Provider	IET Digital Library
Author	Schmalz, K. Mao, Y. Borngräber, J. Neumaier, P. Hübers, H. W.
Abstract	A 245 GHz sensor system for gas spectroscopy is presented, which includes an integrated SiGe transmitter (TX) and receiver (RX), and a 0.6 m-long gas absorption cell between the TX and RX modules. The integrated local oscillators (LOs) of TX and RX chips are controlled by two external phase-locked loops (PLLs), whose reference frequencies are swept with constant frequency offset for a low intermediate frequency of the RX. The RX consists of a differential low-noise amplifier, an integrated 122 GHz LO with a 1/64 divider, a 90° differential hybrid and an active subharmonic mixer. The TX consists of an integrated 122 GHz LO with a 1/64 divider, and a frequency doubler. The TX and RX chips are fabricated in 0.13 µm SiGe BiCMOS technology with f T/f max of 300 GHz/500 GHz. Using external dielectric lenses for the TX and RX modules, the gas absorption spectra were measured for acetonitrile and methanol.
Starting Page	881
Ending Page	882
Page Count	2
ISSN	00135194
Volume Number	50
e-ISSN	1350911X
Issue Number	Issue 12, Jun (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/50/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2014.0625
Journal	Electronics Letters
Publisher Date	2014-05-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acetonitrile Active Subharmonic Mixer Amplifiers BiCMOS BiCMOS Integrated Circuit Chemical Sensor Circuit Tuning Constant Frequency Offset Demodulator Differential Hybrid Subharmonic Mixer Differential Low-noise Amplifier Discriminators And Mixers External Dielectric Lenses External Phase-locked Loops Frequency 245 GHz to 122 GHz Gas Absorption Cell Gas Sonsor Gas Spectroscopy Ge-Si Alloy Integrated Local Oscillator Lenses Low Noise Amplifier Methanol Microwave IC Millimetre Wave Mixers Mixed Technology Integrated Circuit Modulator Oscillator Phase Locked Loop Radio Link And Equipment Radio Receiver Radio Transmitters Semiconductor Material SiGe SiGe Technology Size 0.6 M Tunable Receiver Tunable Transmitter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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