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Portable millimeter wave passive focal plane imaging system

An imaging system and focal plane technology, applied in the direction of measuring devices, instruments, antenna supports/mounting devices, etc., can solve the problems of large volume and poor portability, and achieve the effects of small volume, light weight, and easy processing

Inactive Publication Date: 2016-03-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of large volume and poor portability of existing passive focal plane imaging systems, the present invention provides a portable millimeter-wave passive focal plane imaging system. The focusing antenna adopts a lens antenna, and the feed antenna adopts a conjugate linear gradient slot antenna. The portable millimeter-wave passive focal plane imaging system of the present invention is small in size, easy to process, high in integration and good in imaging effect

Method used

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  • Portable millimeter wave passive focal plane imaging system
  • Portable millimeter wave passive focal plane imaging system
  • Portable millimeter wave passive focal plane imaging system

Examples

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Embodiment 1

[0036] Such as figure 1 , 2 As shown, a portable millimeter-wave passive focal plane imaging system includes a cylinder 2 with a lens antenna 1 installed at one end, and a focal plane feed array 3 facing the lens antenna 1 is fixed inside the cylinder 2 to pass through the lens antenna 1 The microwave arrives at the focal plane feed source array 3, and the focal plane feed source array 3 is connected to the radiometer receiver group 4, and the radiometer receiver group 4 is connected to the signal conditioning circuit 5, and the signal conditioning circuit 5 is connected to a power supply with signal output and power input ports. The transfer circuit 6, the signal conditioning circuit 5, and the transfer circuit 6 adopt the signal conditioning circuit and the transfer circuit of the traditional millimeter-wave imaging system, the output interface is connected to the electrical signal acquisition card of the computer, and the acquisition card collects the electrical signal outp...

Embodiment 2

[0050] The portable millimeter-wave passive focal plane imaging system of Embodiment 2 is basically the same as Embodiment 1, the difference being that: image 3 As shown, more than two feed antennas 30 are integrally processed into a focal plane feed array 3, and a plurality of feed antennas are fabricated on a dielectric substrate through photolithography and other processes, and each feed antenna 30 passes through a coaxial Connectors, coaxial cables and coaxial waveguide converters connect radiometer 40 . The focal plane feed array 3 is in the shape of a rectangular sheet, and more than two feed antennas 30 are aligned and arranged in a row. The feed antenna 30 is used as a conjugate linear graded slot antenna and is processed on a whole dielectric substrate, which greatly saves the cost of the imaging system and improves the performance of the portable imaging system.

Embodiment 3

[0052] The portable millimeter-wave passive focal plane imaging system of the third embodiment is basically the same as that of the second embodiment, the difference being that: Figure 4 As shown, the focal plane feed array 3 is fan-shaped, more than two feed antennas 30 are arranged sequentially along an arc, the phase centers of all feed antennas 30 are arranged along the curve, and the arrangement curve equation is the surface equation of the lens.

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Abstract

The invention provides a portable millimeter wave passive focal plane imaging system. The portable millimeter wave passive focal plane imaging system comprises a cylinder of which one end is equipped with a lens antenna, wherein the cylinder is internally fixed with a focal plane feed source array opposite to the lens antenna, the focal plane feed source array is connected with a radiometer reception set, the radiometer reception set is connected with a signal conditioning circuit, and the signal conditioning circuit is connected with a switching circuit having a signal output port and a power supply input port. The portable millimeter wave passive focal plane imaging system has properties of small volume and light weight, can be held by a single person to scan a target scene for imaging and can realize millimeter wave imaging of building and ground vehicle targets all day long.

Description

technical field [0001] The present invention relates to the technical field of passive millimeter wave detection, and more specifically relates to a portable millimeter wave passive focal plane imaging system. Background technique [0002] In the field of millimeter wave detection technology, the passive focal plane imaging system occupies a very important position. However, the biggest problems in the existing passive focal plane imaging system are: the overall size of the system is too large, the portability is poor, and the cost is high, so it is difficult to popularize and use. [0003] Specifically, the focusing antenna used in the traditional passive focal plane imaging system is often a reflector antenna, which is a rotating parabolic antenna. However, the rotating parabolic antenna often makes the size of the system large and there is a feed source shielding Effect; the feed antenna used in the traditional passive focal plane imaging system is often a horn antenna l...

Claims

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Application Information

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IPC IPC(8): G01J5/08H01Q1/22
CPCG01J5/0806G01J2005/0077H01Q1/22
Inventor 王文王学田
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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