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Radar scattering cross section measuring device

A measurement device and terahertz detector technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large measurement errors and complex structures, and achieve the effects of comprehensive measurement, increased detection accuracy, and simplified devices

Inactive Publication Date: 2016-12-07
HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a radar cross-section measurement device, which aims to use periodic terahertz waves for detection, thereby solving the problem of complex structure and measurement error of the existing measurement device. big technical problem

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Embodiment 1

[0052] figure 1 It is a top view of the measuring device of embodiment 1, which is located in the xz plane, including chopper controller 3, Gunn oscillator 1, chopper 2, collimator lens 4, high-resistance silicon wafer 5, rotary table 7. Absorber 12, focusing lens 8, unbiased Schottky diode 9, lock-in amplifier 10, and computer 11; wherein, the first terahertz wave of 0.1 THz sent by the Gunn oscillator 1 passes through the chopper in sequence 2. The collimating lens 4 and the high-resistance silicon wafer 5 propagate along the positive direction of the z-axis and project on the target body 6 of the rotary table 7;

[0053] The first output end of the chopper controller 3 is connected to the chopper 2, and the second output end is connected to a lock-in amplifier for simultaneously outputting a frequency signal to both, and the chopper 2 controls the Gunn oscillator according to the frequency signal The first terahertz wave with stable amplitude emitted by 1 is modulated into...

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Abstract

The invention discloses a radar scattering cross section measuring device. The measuring device comprises an electrical terahertz source, a first terahertz lens, a beam-splitting mirror, a target support base, a second terahertz lens, a terahertz detector, and a data collection device. The electrical terahertz source, the first terahertz lens, the beam-splitting mirror, and the target support base are sequentially arranged in a first direction. The beam-splitting mirror, the second terahertz lens and the terahertz detector are sequentially arranged in a second direction, and the output end of the terahertz detector is connected with the first input end of the data collection device. According to the invention, with only one beam-splitting mirror, the direction of a terahertz wave scattered by the surface of a target body is completely matched with the receiving direction of a terahertz detector, simplifying the structure of an existing measuring device and reducing the measuring error.

Description

technical field [0001] The invention belongs to the field of radar scattering cross section, and more specifically relates to a measuring device for radar scattering cross section. Background technique [0002] Radar cross section (RCS) is a physical quantity that characterizes the intensity of target scattering. The measurement of radar cross section is extremely important for military and related fields. It has important guidance for target classification and identification, tracking point selection and stealth technology. significance, and thus received much attention. The traditional RCS measurement focuses on the microwave frequency band, and extending the RCS from the microwave frequency band to the terahertz frequency can not only measure the radar cross section of the target object in the terahertz band, but also measure the radar cross section of the scaled model of the target object. , to obtain the radar cross section of a full-scale target in the microwave band,...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/412
Inventor 聂雪莹王可嘉黄欣项飞荻刘劲松王晓冰杨振刚武亚君
Owner HUAZHONG UNIV OF SCI & TECH
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