Method for identifying radar target characteristic measuring synchronous scattering point position of compact range

Abstract

The invention discloses a method for identifying a radar target characteristic measuring synchronous scattering point position of a compact range. The method comprises the following steps: building a three-dimensional rectangular coordinate system in a dark chamber of the compact range; determining position of a feed source of the compact range in the three-dimensional rectangular coordinate system; determining position of a reflective surface of the compact range according to the position of the feed source of the compact range and position of a test area; taking the position T of the feed source in the compact range as a circle center and taking a transmission wave propagation path for reflecting reflection wave of the feed source of the compact range by the reflective surface of the compact range to a position A of a target to be tested in the test area as a semi-diameter to build a spherical surface in the dark chamber of the compact range, wherein the synchronous scattering point is arranged at an intersection between the spherical surface and all the surfaces of the dark chamber of the compact range and objects in the dark chamber of the compact range. The method can be used for quickly finding the position of the synchronous scattering point which has interference effect and arrives at the feed source of the compact range with a scattering signal of the target to be tested in the compact range simultaneously.

Description

Technical field [0001] The invention relates to a method for identifying the position of a scattering point. More specifically, it relates to a method for identifying the position of a synchronized scattering point by measuring the target characteristic of a compact field radar. Background technique [0002] With the development of stealth and anti-stealth technology, the measurement accuracy of radar target characteristics is becoming higher and higher. In order to meet the classical far-field conditions of radar target characteristic measurement, the compressed field has become the most commonly used method for radar target characteristic measurement. The schematic diagram of indoor compact field radar target characteristic measurement is as figure 1 As shown, the compressed field feed source emits spherical electromagnetic waves, which are reflected by the reflection surface of the compression field and converted into plane waves to illuminate the target under test. After the...

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Problems solved by technology

However, this processing method cannot eliminate the interference scattering signal emitted by the compact field feed source in the compact field, scattered by the scattering points in the compact field to the compact field feed source, and the transmitted wave of the compact field feed source is reflected by the compact field reflective surface. Arrive at the target to be measured, and then return from the original path to the scattered signal of the target to be measured with the same time as the scattered signal of the compact field feed, that is, if the interfering scattered signal is time-synchronized with the target scattered signal, then through the existing time-domain gating method, cannot be removed

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