Patent ID: 9077412
Filing Date: 2015-07-07
Classification: G01S,H04B

Abstract:
1. An apparatus for receiving millimeter and sub-millimeter wavelength imaging signals, said apparatus comprising: an antenna configured for receiving millimeter and sub-millimeter wavelengths; a regenerative oscillator circuit configured for oscillating at a first frequency in response to receiving a signal from said antenna; an envelope detector circuit coupled to an output of the regenerative oscillator circuit, said envelope detector circuit configured for generating a digital envelope threshold output in response to detecting that an oscillation envelope has reached a threshold; and a digital quench circuit coupled to said regenerative oscillator circuit, said digital quench circuit configured for activating and deactivating said regenerative oscillator in response to receiving said digital envelope threshold output, and for generating a time encoded digital signal in response to pixel amplitude during millimeter and sub-millimeter wavelength imaging.