A Combination Millimeter-Wave Doppler Radar and THz Spectrometer for Planetary Science

Conference paper (2017)

Authors

K.B. Cooper California Institute of Technology
C. Baldi California Institute of Technology
A. Skalare California Institute of Technology
A. Tang California Institute of Technology
S. Tanelli California Institute of Technology
E. Gandini Tera-Hertz Sensing - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
G. Chattopadhyay California Institute of Technology
M. Choukroun California Institute of Technology
C. Cochrane California Institute of Technology
R. Dengler California Institute of Technology
S. Durden California Institute of Technology
T.O. El Bouayadi California Institute of Technology
D. Gonzalez California Institute of Technology
R.R. Monje California Institute of Technology
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
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Published Date

2017

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

A combination 95 GHz radar and 270/560 GHz spectrometer is being built
as a space instrument prototype for probing plumes and jet phenomena in
the solar system. Dubbed GAISR (Gas And Ice Spectrometer/Radar), the
instrument's radar will make simultaneous range/Doppler measurements of
0.1-10 mm sized ice and dust particles out to a few km in range, while
its tunable spectrometer will detect the abundance and velocities of
gaseous water and other volatiles. Here we describe how the radar and
spectrometer share a back-end architecture, and present some innovative
elements of GAISR's frequency-modulated continuous-wave (FMCW) radar,
including high-isolation and low-loss transmit/receive duplexing and a
phase-noise-canceling RF architecture.

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