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Real-time mutual correlated millimeter wave imaging system

A millimeter-wave, cross-correlation technology, applied in the field of real-time millimeter-wave imaging systems, can solve problems such as the difficulty of coherent local oscillator allocation

Inactive Publication Date: 2005-09-14
COMMONWEALTH SCI & IND RES ORG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The distribution of coherent local oscillators to such a large number of mmWave heterodyne receivers presents considerable difficulties

Method used

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  • Real-time mutual correlated millimeter wave imaging system
  • Real-time mutual correlated millimeter wave imaging system

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Embodiment Construction

[0019] A method and apparatus for forming an image from millimeter waves, a method and antenna for receiving millimeter wave radiation, a method and apparatus for receiving millimeter wave radiation to generate an image, a method for Methods and systems for millimeter wave imaging. In the following description, numerous specific details are set forth. In other instances, details that are well known to those skilled in the art may not be stated so as not to obscure the present invention. It will be apparent to those skilled in the art that modifications, substitutions and / or changes may be made in view of this disclosure without departing from the scope and spirit of the invention.

[0020] Embodiments of the present invention include improved imaging methods, antennas, and systems that enable a simple, low-cost device capable of real-time imaging of moving objects. In general terms, this embodiment generates a map or image of millimeter-wave luminance within the field of vie...

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Abstract

A method and apparatus are disclosed for forming an image from millimetre waves. A field of view scanned using two geometrically orthogonal, intersecting copolarized fan beams ( 110, 120 ) to receive millimetre wave radiation. The received millimetre wave radiation from said fan beams are then cross-correlated ( 250, 650 ). Also, a method and antenna ( 400, 610 ) for receiving millimetre wave radiation are disclosed. The antenna includes first and second fan beam antennas ( 410, 420 ) for receiving millimetre wave radiation and a filter ( 430, 440 ) for rotating polarization of incident millimetre wave radiation through 90 degrees received by the second fan beam antenna ( 410 ). The respective first and second beams ( 110, 120 ) intersect and are co-polarized and geometrically orthogonal to each other. Still further, a millimetre wave imaging system ( 600 ) and method are also disclosed, which utilise an antenna ( 610 ) for receiving millimetre wave radiation, process the received millimetre wave radiation from the antenna ( 610 ), and build up the image ( 682 ) using a filtered, cross-correlated signal.

Description

technical field [0001] The present invention relates generally to millimeter wave imaging systems, and more particularly to real-time millimeter wave imaging systems for detecting millimeter wave radiation and generating corresponding images. Background technique [0002] Millimeter wave imaging systems produce images of a scene by detecting heat generating radiation in the 30-300 GHz range emitted or reflected by objects within the device's field of view. Such a system offers advantages over equivalent devices that detect infrared and visible light because millimeter-wave radiation is able to penetrate low-visibility and obscuring environments (e.g., clothing, walls, clouds, smoke, mist, rain, dust, smoke , sandstorm-induced environment) without a high level of attenuation at another significant wavelength. This is especially the case for certain "windows" of atmospheric transmission of radiated waves that occur between 90 and 110 GHz and 210 and 250 GHz. [0003] mmWave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/10G01S13/89H01Q3/08H01Q3/18H01Q3/20H01Q13/02H01Q15/24H01Q19/13H01Q19/195H01Q21/00
CPCH01Q19/138G01S13/89H01Q15/248H01Q3/18H01Q19/195G01S13/887H01Q3/08
Inventor 约翰·W.·阿切尔奥亚·塞维姆勒杰弗里·C.·詹姆斯
Owner COMMONWEALTH SCI & IND RES ORG