A 1.42-mm2 0.45-0.49 THz Monostatic FMCW Radar Transceiver in 90-nm SiGe BiCMOS

Terahertz frequency-modulated continuous-wave (FMCW) radars operating close to and beyond f_{\max} often use gain-enhancing lenses to improve the signal-to-noise ratio. A compact single-chip transceiver benefits a lot from the alignment of the lens to the single on-chip antenna in a monostatic syste...

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Bibliographic Details
Published in:IEEE transactions on terahertz science and technology 2022-11, Vol.12 (6), p.592-602
Main Authors: Mangiavillano, Christoph, Kaineder, Alexander, Aufinger, Klaus, Stelzer, Andreas
Format: Article
Language:English
Subjects:
CMOS
Continuous radiation
Couplers
Down-converters
Emitters
Frequency multipliers
Frequency-modulated continuous-wave (FMCW) radar
Insertion loss
mixer
Mixers
multiplier
on-chip antenna
Patch antennas
Radar
Radar antennas
Radar measurement
Receiving antennas
SiGe bipolar CMOS (BiCMOS)
Signal to noise ratio
Silicon germanides
Single sideband transmission
terahertz (THz)
Terahertz frequencies
Transceivers
Transmitting antennas
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Summary:Terahertz frequency-modulated continuous-wave (FMCW) radars operating close to and beyond f_{\max} often use gain-enhancing lenses to improve the signal-to-noise ratio. A compact single-chip transceiver benefits a lot from the alignment of the lens to the single on-chip antenna in a monostatic system. The typically required coupler for monostatic operation adds an insertion loss. The proposed multiply-by-24 frequency multiplier-based FMCW radar transceiver removes the coupler and integrates both the final 0.48-THz doubler and subharmonic downconverter into a single common collector push-push doubler. The common emitter is the only port at 0.48 THz in this monostatic system, feeding the top-metal on-chip patch antenna using a direct via stack. The 1.42-mm 2 monostatic FMCW radar transceiver, manufactured in a 90-nm SiGe bipolar CMOS (BiCMOS) technology with an f_\text{T}/f_{\max} of 300/480 GHz consumes 85 mA when connected to a 3.3-V supply. At 0.48 THz, the output power is -12 dBm and the single-sideband noise figure is measured as 36.3 dB. FMCW radar measurements with operating bandwidths of up to 55 GHz, corresponding to a theoretical range resolution of 2.73 mm are performed using an on-board frequency source of a credit card sized demonstrator.
ISSN:2156-342X
2156-3446
DOI:10.1109/TTHZ.2022.3208069