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Measuring Radar Scattering Cross Section Area by Extrapolation Method

A radar scattering and cross-sectional area technology, applied in the field of radar, can solve the problems of lack of calibration information of RCS measurement system, large uncertainty of measurement results, and small reflection of electromagnetic waves, so as to enrich RCS measurement information, comprehensive measurement result information, and improve measurement The effect of accuracy

Active Publication Date: 2019-09-17
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using a sphere to calibrate the RCS measurement system is that since the sphere is a sphere in all viewing directions, there is no change in the 360-degree rotation of the RCS, thus lacking calibration information for the azimuth and elevation angles of the RCS measurement system
In addition, the sphere has little reflection of the received electromagnetic wave, so that the signal-to-noise ratio (SNR) and signal-to-clutter ratio (SCR) of the measurement signal are low, which will cause the measurement sensitivity of the calibrated RCS measurement system to be low, and the measurement results are uncertain big
[0003] If other reflectors with angle RCS information are used to calibrate the RCS measurement system, the RCS value of the reflector must be known first, and the accurate RCS value of complex geometry cannot be obtained at present

Method used

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  • Measuring Radar Scattering Cross Section Area by Extrapolation Method
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  • Measuring Radar Scattering Cross Section Area by Extrapolation Method

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Embodiment Construction

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0020] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention discloses a method for measuring a radar cross section by using an extrapolation method. The method includes the following steps that: the position of a transmitting source is aligned with the position of a measured target, so that the transmitting source can be aligned with the measured position of the measured target; in a process in which the transmitting source leaves the measured target, the radiation power or electromagnetic wave amplitudes of the transmitting source under a plurality of measurement positions and received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target are correspondingly obtained; a radar cross section measurement curve which changes with the distance of the transmitting source and measured target is obtained according to the radiation power or electromagnetic wave amplitudes of the transmitting source under the plurality of measurement positions and the received spatial radiation power or electromagnetic wave amplitudes which are scattered by the target; the function of the change of the radar cross section of the measured target with the distance is obtained according to the radar cross section measurement curve; and the distance infinity limit of the function is solved, so that the radar cross section of the measured target can be obtained. The method has the advantages of high measurement accuracy and wide application range.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to an extrapolation method for measuring the radar scattering cross-sectional area. Background technique [0002] The current radar cross-sectional area (RCS) measurement method is to calibrate the entire test system (or "calibration", "calibration") through the sphere, and to carry out the RCS measurement value of the sphere and the target in the test field successively. By comparison, the RCS value of the measured target is obtained, and the RCS value of the sphere is obtained by theoretical calculation (metal ball: Pi*r^2, r is the radius of the sphere). The disadvantage of using a sphere to calibrate the RCS measurement system is that since the sphere is a sphere in all observation directions, there is no change in the 360-degree rotation of the RCS, thus lacking calibration information for the azimuth and elevation angles of the RCS measurement system. In addition, the sphere ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
Inventor 崔孝海袁文泽李勇魏广宇高小珣
Owner NAT INST OF METROLOGY CHINA
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