Passive 77 GHz millimeter-wave sensor based on optical upconversion.
A passive millimeter-wave (mmW) sensor operating at a frequency of 77 GHz is built and characterized. The sensor is a single pixel sensor that raster scans to create an image. Optical upconversion is used to convert the incident mmW signal into an optical signal for detection. Components were picked to be representative of a single element in a distributed aperture system. The performance of the system is analyzed, and the noise equivalent temperature difference is found to be 0.5 K (for a 1 s integration time) with a diffraction limited resolution of ~8 mrad. Representative images are shown that demonstrate the phenomenology associated with this spectrum.
University of Delaware, Department of Electrical and Computer Engineering, Newark, Delaware 19716, USA. jwils@udel.edu
John P
JP
Wilson
Christopher A
CA
Schuetz
Thomas E
TE
Dillon
Peng
P
Yao
Charles E
CE
Harrity
Dennis W
DW
Prather