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RCS (radar cross section) measurement device based on single continuous terahertz laser source

A measurement device, terahertz technology, applied in the field of terahertz radar scattering cross-section measurement, to achieve high-precision measurement, reduce measurement error, and simple structure

Active Publication Date: 2012-05-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of measuring the radar scattering cross section of targets with different sizes in the 2.52THz band, the present invention provides an RCS measuring device based on a single continuous terahertz laser source

Method used

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  • RCS (radar cross section) measurement device based on single continuous terahertz laser source
  • RCS (radar cross section) measurement device based on single continuous terahertz laser source
  • RCS (radar cross section) measurement device based on single continuous terahertz laser source

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specific Embodiment approach 1

[0053] Specific implementation mode one: the following combination Figure 1 to Figure 9 Describe this embodiment, the RCS measurement device based on a single continuous terahertz laser source in this embodiment, it includes a CO2 laser pumped continuous terahertz laser 1, a chopper 2, a beam splitter 3, an electronically controlled variable beam expander Ratio device 4, P3 off-axis parabolic mirror 5-1, P2 off-axis parabolic mirror 5-2, precision motion platform 6, M1 total reflection mirror 7-1, P1 off-axis parabolic mirror 5-3, scattered signal detector 8- 1, the driver of the first lock-in amplifier module 9-1, computer 10 and chopper,

[0054] The parallel beam output by the CO2 laser pumped continuous terahertz laser 1 is chopped by the chopper 2 and then incident on the beam splitter 3, and the transmitted beam transmitted by the beam splitter 3 is expanded by the electronically controlled variable beam expansion ratio device 4 and then incident To the P3 off-axis par...

specific Embodiment approach 2

[0061] Specific implementation mode two: the following combination figure 1 Describe this embodiment, this embodiment is a further description of Embodiment 1, the measuring device also includes a P4 off-axis parabolic mirror 5-4, a reference signal detector 8-2 and a second lock-in amplifier module 9-2,

[0062] The reflected light of the beam splitter 3 is incident on the P4 off-axis parabolic mirror 5-4, and the output beam formed by the reflection of the P4 off-axis parabolic mirror 5-4 is received by the photosensitive surface of the reference signal detector 8-2, and the reference signal detector 8- The electrical signal output end of 2 connects the electrical signal input end of the second lock-in amplifier module 9-2, and the amplified signal output end of the second lock-in amplifier module 9-2 connects the reference signal input end of the data acquisition card of computer 10;

[0063] The reference signal input end of the second lock-in amplifier module 9-2 is conne...

specific Embodiment approach 3

[0066] Specific implementation mode three: the following combination figure 2 Describe this embodiment, this embodiment is a further description of Embodiment 1 or 2, the precision motion platform 6 is composed of a standard target electronically controlled translation platform 6-1 and an electronically controlled translation platform 6-4 for a target to be measured,

[0067] The slides on the standard target electronically controlled translation platform 6-1 and the target electronically controlled translation platform 6-4 to be measured are parallel to each other, and the standard target fixed frame 6-2 is connected to the standard target electronically controlled translation platform 6-1 through the fixed base plate. The translation platform is connected, the standard target electric control rotary table 6-3 is fixed on the upper end surface of the standard target fixed frame 6-2, and the standard target is set on the rotary table of the standard target electric control rot...

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Abstract

The invention relates to an RCS (radar cross section) measurement device based on a single continuous terahertz laser source and belongs to the technical field of terahertz RCS measurement. The RCS measurement device can be used for solving the problem in measuring the RCS of target radars of different sizes in a 2.52THz waveband. The RCS measurement device comprises a CO2 laser pumping continuous terahertz laser, a chopper, a beam splitter, an electrical control variable expansion ratio device, a P3 off-axis parabolic mirror, a P2 off-axis parabolic mirror, a precise movement platform, an M1total reflector, a P1 off-axis parabolic mirror, a scattered signal detector, a first lock-in amplifier module, a computer and a chopper driver. The RCS measurement device is suitable for RCS measurement on the target radars of different sizes.

Description

technical field [0001] The invention relates to an RCS measuring device based on a single continuous terahertz laser source, and belongs to the technical field of terahertz radar scattering cross-section measurement. Background technique [0002] Terahertz (THz for short) radiation generally refers to electromagnetic radiation with a frequency in the range of 0.1-10 THz, and electromagnetic radiation in this band can penetrate most non-metallic and non-polar substances. Compared with other band radars, terahertz radar has moderate search capability, coverage and spatial resolution, and is currently a key topic of terahertz technology research at home and abroad. [0003] Radar cross section (radar cross section, abbreviated as RCS) is an important parameter in radar, which has important guiding significance for radar system design, target recognition and stealth technology. Since the theoretical calculation cannot give the accurate actual RCS of the target, the measurement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
Inventor 李琦薛凯李慧宇陈德应王骐
Owner HARBIN INST OF TECH
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