Preparation method of passive interference test ball

Abstract

The invention belongs to the technical field of airborne self-defense electronic countermeasure engineering application, and discloses a preparation method of a passive interference test ball unit. The method comprises the following steps: selecting a foamed foam hemispheroid with ultralow electromagnetic wave loss / reflection according to the scale of a chaff wire / foil; adhering a chaff wire or afoil to the middle position of the plane section of the foaming foam hemispheroid by adopting foam glue; smearing a small amount of foam glue at the position, close to the outer edge, of the circularsection of the foam hemispheroid, and butting the other hollow foam hemispheroid with the foam hemispheroid to form a whole sphere; marking the whole ball body; and airing the manufactured passive interference test ball unit. The reflected electromagnetic waves are mainly chaff wires or foils in the sphere, and the loss of the electromagnetic waves caused by the reflected electromagnetic waves ormaterials can be ignored. And the foam material for bearing the chaff wires / foils is spherical, so that the purpose of randomly distributing the chaff wires / foils in a three-dimensional space is achieved.

Description

technical field [0001] The invention belongs to the technical field of airborne self-defense electronic countermeasure engineering application, and in particular relates to a passive interference test ball unit and a preparation method thereof. Background technique [0002] Passive jamming is a commonly used radar jamming technology, and it is also one of the necessary electronic countermeasure resources for combat aircraft of the world's air forces. In passive interference, a large number of metal foil strips (usually half-wavelength) or metal foils are packaged according to certain technologies, and prefabricated into passive interference monomers of certain technical specifications (passive interference bombs, or Passive interference package); before the aircraft takes off, a certain number of these monomers are assembled into the passive delivery device of the aircraft; in the process of jamming the radar, the aircraft will release these monomers in sequence according to...

AI Technical Summary

Problems solved by technology

However, this kind of test is not easy to determine the distance between each chaff wire / foil, and this method has actually limited the distribution form of the two-dimensional plane, rather than the passive interference monomer throwing the chaff wire in the actual application process / Cloud-like random distribution in three-dimensional space formed by the foil

Therefore, this test will inevitably have a large error with the RCS that the passive interference monomer can produce

The second test method is the live ammunition test method, which is to test when the aircraft is throwing passive jamming monomers. Regardless of the test cost, this method has two defects in terms of technology: one is that the aircraft may be harmful to passive interference. Interference with RCS produces occlusion; the second is that the chaff / foil is thrown out, and before it is completely dispersed, there is a certain movement speed in a very short period of time, which is easy to be confused with the aircraft RCS, resulting in inaccurate testing

[0006] (1) In the production process of passive interference monomers, the number of chaff wires or foils required is estimated by traditional theory, which is obviously inaccurate

[0007] (2) There will be a large deviation between the RCS ground test method of the passive interference unit sprinkled by mosquito nets and the RCS that can be generated by the passive interference unit

[0008] (3) The live ammunition test method of the passive jamming single RCS has two defects: one is that the aircraft may block the passive jamming RCS; There is a certain speed of movement in a short period of time, which is easy to be confused with the RCS of the aircraft, resulting in inaccurate testing

[0010] To solve the problem (1) it is necessary to modify the parameters of the traditional theory. If more accurate parameters can be obtained, a more accurate number of chaff wires / foils can be obtained; but this requires accurate testing, and the aforementioned methods cannot give accurate test

[0011] The method to solve the problem (2) is to let the chaff wire / foil be randomly oriented in three-dimensional space, but the method of (2) cannot be realized

[0012] To solve problem (3), it is necessary that electromagnetic waves can pass through the aircraft platform during the test, but the power of the aircraft cannot leave the metal, which means that it is necessary to redesign and realize an almost impossible aircraft platform, and the technical difficulty is almost no untie

[0013] To sum up, none of the existing technologies for passive interference single RCS testing can meet the needs of accurate testing of passive interference single RCS, and cannot test the three-dimensional distribution and changes of its RCS.

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