Preparation method of magnetic wave absorption patch shrinkage simulation composite material

Abstract

The invention discloses a preparation method of a magnetic wave absorption patch shrinkage simulation composite material. The method comprises the following steps: step 1, in a given thickness range, calculating a bevel reflectivity of the simulation composite material of different formulas at a shrinkage frequency, finding out the simulation composite material with the bevel reflectivity most approximate to that of a magnetic wave absorption patch prototype material under a prototype frequency, and determining the formula of the simulation composite material; step 2, weighing electromagnetic particles and binders; step 3, charging, and mixing; step 4, vulcanizing to obtain a vulcanized sheet; and step 5, thermally treating the vulcanized sheet to obtain a magnetic wave absorption patch for shrinkage simulation. By adopting the preparation method, the problems that the electromagnetic parameters of electromagnetic particles are difficult to test, the influence of the shape and distribution form of the electromagnetic particles to the equivalent parameters of the material is difficult to calculate and the like can be avoided, the accurate calculation of the equivalent electromagnetic parameters of the composite material is realized, the formula is obtained by virtue of the optimized design of the bevel reflectivity, the engineering application value is high, and the method can be widely used for preparing the shrinkage simulation composite material.

Description

technical field [0001] The invention belongs to the field of design and construction of electromagnetic scaling simulation composite materials in the study of target and environmental electromagnetic scattering characteristics, relates to an electromagnetic scaling simulation composite material, and in particular to a preparation method of a magnetic wave-absorbing patch scaling simulation composite material. Background technique [0002] Accurate measurement of radar cross section is an important research method for radar detection, target recognition and electronic warfare technology, and it plays a pivotal role in improving the defense capability of our country's weapon system and in the development of new stealth weapon systems. The usual measurement methods mainly include full-scale actual measurement method and electromagnetic scaling measurement method. Due to the fact that the field full-scale measurement method has difficulties in obtaining real targets, poor contro...

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Problems solved by technology

However, most materials cannot maintain magnetic properties in the frequency range of the scaled measurement, which makes it difficult to obtain the electromagnetic parameters of the prototype material at the prototype test frequency.

National defense patent "a non-metallic target electromagnetic scattering characteristics scaling test method" (patent number: ZL200710081915.X), national defense patent "a sea water scaling simulation material manufacturing method for electromagnetic scattering characteristics test" (patent number: 201218005632.90 ), the national defense patent "Preparation method and system of non-metallic materials in the sub-millimeter wave band" (patent number: 201318007995.00) and the national defense patent "High dielectric constant sea water shrinkage simulation composite material processing method" (patent number: 201318007991.20) have all been carried out Research on the preparation method of electromagnetic scaling materials. The materials prepared in these patents are all non-magnetic materials. It is only necessary to design the dielectric constant so that it is the same or close to the dielectric constant of the prototype material at the prototype test frequency. The design method of specific materials is not suitable for the scale design of magnetic materials, and the formulas used in the design of material formulations are general equivalent medium theoretical formulas, which are not suitable for the calculation of equivalent electromagnetic parameters of high-concentration mixtures, and the filled particles are often It is a spherical particle, and the calculation error will be larger for anisotropic filled particles

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