Passive millimeter wave focal plane image formation device

Abstract

The invention relates to a passive millimeter wave focal plane image formation device, belonging to the field of passive millimeter wave image formation device and aiming to solve the problem of limited pixel and low image formation resolution faced by the existing image formation device. The device comprises N-numbered feed sources and N-numbered millimeter wave radiometer channels; the N-numbered feed sources are arranged on the focal plane of focusing antenna in the form of linear array; each millimeter wave radiometer channel is composed of a radio-frequency amplifier, a radio-frequency filter, a frequency mixer and an A / D converter which are connected in series in sequence; N-numbered intermediate frequency digital signals are transmitted to a computer for carrying out self-correlation and mutual correlation processing, the computer obtains antenna temperature Tai and interferometry temperature Tcij, the computer then processes the antenna temperature Tai to obtain pixel value Ti and inserts the interferometry temperature Tcij between pixel value Ti and Tj to mutually form an focal plane image. In the invention, coherent image formation and incoherent image formation are effectively combined, so that the number of pixels of the image is increased and spatial resolution of image formation is improved.

Description

technical field [0001] The invention belongs to the field of passive millimeter wave imaging, and in particular relates to a passive millimeter wave focal plane imaging device. Background technique [0002] Passive Millimeter-wave (PMMW) imaging system has all-day and all-weather working capabilities, and because it does not emit electromagnetic waves, it has high concealment and anti-interference, which is safe for the human body. , security inspection, military reconnaissance and other fields have broad application prospects. The early passive millimeter-wave imaging systems used a single-channel mechanical scanning structure due to the immaturity of millimeter-wave devices. With the continuous advancement of millimeter-wave devices and the increasing application range of passive millimeter-wave technology, a natural development of this type of system is Multi-channel parallel scanning is used to increase the data rate and imaging speed. The ultimate goal is to build a la...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a passive millimeter-wave focal plane imaging device, which solves the problems of limited number of pixels and low imaging resolution existing in existing passive millimeter-wave focal plane imaging systems, and effectively combines coherent imaging and incoherent imaging to obtain relatively The conventional focal plane imaging method based on incoherent measurement technology has more pixels, thereby improving the imaging resolution

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