Science Daily  September 26, 2019 Researchers at the University of Pennsylvania used a standard semiconductor fabrication process to make a microwave imager chip, measuring just over 2 millimeters on each side, containing more than 1,000 photonic components. The imager uses four antennas to receive microwave signals reflected from an object. The microwave signals are then encoded into an optical signal and are optically processed to form an image. To demonstrate the new chip, the researchers used it to image objects with metallic surfaces. The system is significantly smaller and more efficient than its electronic equivalent and can operate with significantly […]