Time-of-Flight Microwave Camera
Author(s)Charvat, Gregory; Temme, Andrew; Raskar, Ramesh; Feigin-Almon, Micha
MetadataShow full item record
Microwaves can penetrate many obstructions that are opaque at visible wavelengths, however microwave imaging is challenging due to resolution limits associated with relatively small apertures and unrecoverable “stealth” regions due to the specularity of most objects at microwave frequencies. We demonstrate a multispectral time-of-flight microwave imaging system which overcomes these challenges with a large passive aperture to improve lateral resolution, multiple illumination points with a data fusion method to reduce stealth regions, and a frequency modulated continuous wave (FMCW) receiver to achieve depth resolution. The camera captures images with a resolution of 1.5 degrees, multispectral images across the X frequency band (8 GHz–12 GHz), and a time resolution of 200 ps (6 cm optical path in free space). Images are taken of objects in free space as well as behind drywall and plywood. This architecture allows “camera-like” behavior from a microwave imaging system and is practical for imaging everyday objects in the microwave spectrum.
DepartmentProgram in Media Arts and Sciences (Massachusetts Institute of Technology)
Nature Publishing Group
Charvat, Gregory, Andrew Temme, Micha Feigin, and Ramesh Raskar. “Time-of-Flight Microwave Camera.” Scientific Reports 5 (October 5, 2015): 14709.
Final published version