A Hybrid CMOS-InP W-Band Imaging Radiometer with Compact MetaSurface Antenna for UAV-Based Wildfire Imaging

This paper presents a CMOS W-band imaging radiometer (passive imager) for wildfire imaging from a small drone platform. To keep the instrument compact, the radiometer adopts a highly integrated approach where a CMOS System-on-chip is used to implement the radiometer electronics except for the front-...

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Bibliographic Details
Published in2024 IEEE/MTT-S International Microwave Symposium - IMS 2024 pp. 422 - 424
Main Authors Tang, Adrian, Chahat, Nacer, Gupta, Gaurangi
Format Conference Proceeding
LanguageEnglish
Published IEEE 16.06.2024
Subjects
Imaging
MetaSurface
Metasurfaces
Radiometer
Sensitivity
Temperature measurement
Temperature sensors
Time measurement
W-Band
Wildfires
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Summary:This paper presents a CMOS W-band imaging radiometer (passive imager) for wildfire imaging from a small drone platform. To keep the instrument compact, the radiometer adopts a highly integrated approach where a CMOS System-on-chip is used to implement the radiometer electronics except for the front-end LNA implemented with InP for noise temperature purposes. The receiver is coupled with an all metal metasurface (MTS) antenna that provides low losses at W -band, maintaining radiometric sensitivity. The demonstrated radiometer offers a measured NEΔT of better than 2K with an integration time of 50 ms, while exhibiting an Allan time > 25 seconds, allowing it to operate without calibration for sensing high contrast fires. The entire module including CMOS chip, amps and support circuitry consumes only 290mW of DC power.
ISSN:2576-7216
DOI:10.1109/IMS40175.2024.10600409