RU2075834C1 - Complex dipole reflector - Google Patents

Abstract

FIELD: devices which set jamming against anti-aircraft defense. SUBSTANCE: device has half-wave elements which are made from foil and glass fiber with metal additions. Said elements are joined into disk coils and packets. Packets have disk coils with dipoles of different length. EFFECT: increased functional capabilities. 2 cl, 2 dwg, 1 tbl

Description

 The invention relates to anti-radar reflectors (PRLO), designed to create passive interference in order to increase the efficiency of overcoming air defense (air defense) aircraft, front-line, long-range and military transport aircraft.

 Modern air defense consists of dozens of different types of radar stations (radars) operating in different frequency ranges and having different tactical purposes, and in peacetime, according to official data, only 30% of the working radar wavelengths of the other side are known.

 Depending on the tactical purpose of the radar, to suppress them, it is necessary to create interference discretely and continuously in the entire possible wavelength range.

 The commercially available dipole reflectors (DO) solve this problem by using up to 40 types simultaneously, attracting at least 8-10 jamming aircraft for this purpose.

 This is explained by the fact that from one to several sizes (in the overwhelming case, two sizes) are put into a pack of each type of serial DO, depending on their purpose. For example, 8.7 and 10 mm; 11.4 and 13 mm, 58 and 63 mm; 50,100 and 176 mm; 275 mm, which are resonant for a relatively narrow wavelength range.

 The object of the invention is a complex dipole reflector.

 The purpose of the invention is the reduction of the range in the wavelength range from 8 mm to 55 cm; increasing the effective dispersion area (EPR) of DO; expanding the tactical capabilities of aircraft suppliers of interference when suppressing both radar detection, guidance, target designation (radar US) and weapon control radar (radar UO) airborne, anti-aircraft and missile systems simultaneously.

 The proposed integrated dipole reflector (BWW) has dipoles of more than 30 sizes in length. Moreover, the length of the dipoles of each size is selected so that the equivalent EPR at each point of the range is not lower than that of serial reflectors, and the fill factor of the useful volume of the packs is equal to unity. Due to this, and also due to the manufacture of dipoles from foil with a smaller width, the fill factor of the packs in the BWW will increase by several (up to 8) times.

 An example of a specific implementation. The table shows the layout of packs, biscuits and sets in KDO-4/275 K, where -4 / 275 is the minimum maximum length up to mm; -K packing in a box.

 BWW consists of 19 packs. The packs are equipped with three types of sets NN 1,2,3, and the sets are assembled according to the scheme "1-2-1-3-1-2-1".

 Set N 1 consists of 4 packs: C3, F1, F2, F3.

 The C3 pack contains 6 biscuits with metallized fiberglass dipoles 40.44.47.52.58 and 63 mm long. Each biscuit has up to 60 thousand dipoles of the corresponding length. The total number of dipoles in the C3 packet is 360 thousand pieces.

 The F1 pack contains 2 biscuits with foil dipoles 80 mm and 195 mm long. Each biscuit has 20 thousand dipoles. The total number of dipoles in the F1 pack is 40 thousand pieces.

 The F2 pack contains 2 biscuits with foil dipoles 120 mm and 155 mm long. Each biscuit has 20 thousand dipoles. The total number of dipoles in the F2 packet is 40 thousand pieces.

 The F3 pack contains 1 biscuit with 275 mm foil dipoles. There are 20 thousand dipoles in the biscuit. The total number of BS in the set N 1 is 460 thousand pieces. A set of N 1 creates interference radar US in the wavelength range from 8 to 55 cm.

 Set N 2 consists of 1 pack C2.

 The C2 pack contains 10 biscuits with DOs of metallized fiberglass 18 and 20 mm long (2 biscuits each), 22, 25, 27, 30, 33, 37 mm (1 biscuit each). Each biscuit has 130 thousand pieces. dipoles of the corresponding length. The total number of dipoles in the pack C2-1300 thousand pieces.

 A set of N 2 creates interference radar UO in the wavelength range from 3.6 cm to 7.4 cm

 Set N 3 consists of one pack C1.

 Pack C1 contains 29 biscuits with DO metallized fiberglass 4 mm long 6 pcs. 4.8 mm 3 pc. 5.8 mm 3 pc. 6.5 mm 1 pc. 7.0 mm 2 pcs. 8 mm 2 pcs. 8.7 mm 2 pcs. 10 mm 2 pcs. 11.4 mm 2 pcs. 13 mm 2pcs, 14.5 mm 2pcs and 16.5 mm 2 pcs. In each biscuit -500 thousand dipoles.

 The total number of dipoles in the pack C1-14500 thousand pieces.

 A set of N 3 creates interference radar US in the wavelength range from 8 mm to 3.3 cm

 The proposed alternation of sets 1-2-1-3-1-2-1 provides the creation of continuous interference radar US and discrete interference radar US.

 One type of KDO-4/275 K reduces the range of serial PRLOs by about 40 times.

 KDO-4 / 275K can be used from standard aircraft automatic devices for resetting passive interference of the APP-22 type without their modification.

 In addition to KDO-4 / 275K, a complex dipole reflector KDO-4/275 U was created according to the same principle for use from standard aircraft automatic reset machines of the ASO-16 type without their modification.

 The characteristics of KDO-4/275 U are identical in all basic parameters to the KDO-4 / 275K reflector.

 The complex dipole reflector KDO-4/275 K (U) provides an extension of the operating range in comparison with serial DOs by about 40 times, which allowed them to be reduced from 80 units to 2 while suppressing the radar in the entire wavelength range from 8 mm to 55 cm simultaneously from one jamming aircraft.

 The principle of BWW is as follows.

 During the flight of the jamming aircraft, the DO packs are released into the airspace, which is scattered, and the radar displays the illumination of the areas within which it is impossible or difficult to observe covered aircraft on the US radar or redirect the US radar on clouds of discrete interference.

An increase in the effective dispersion area is achieved:
an increase in the number of dipoles per unit volume;
the presence in the BWW of practically at every point in the range of resonant DOs, or close to them in length in the BWW of more than 30 sizes, in serial 1-3: -
the presence in BWW at the same time of more than 16 million dipoles in serial tens to hundreds of thousands.

 In addition to resonance dipoles, BWWs always contain in mass quantities both reflectors shorter than resonant ones and reflectors longer than resonant ones.

 Do, having a length less than half a wavelength, have less EPR compared to resonance ones. However, due to the large number (millions of pieces), their total contribution to the resulting EPR is significant (Atrazhev. Struggle with electronic equipment. M. Voenizdat, 1972, p. 101, Fig. 4.2).

 DOs having a length that is a multiple of the number of half-waves or greater than half-waves (tens to hundreds of thousands of pieces) can have an EPR even greater than that of a half-wave vibrator.

 Thus, DOs designed to suppress longer-wavelength stations also make a significant contribution to the equivalent EPR at shorter waves.

 In FIG. Figure 1 shows the EPR dependence on the dipole length and wavelength.

 Contributing to the increase in ESR is the scattering coefficient DO. which, in turn, depends on their length. For example, dipoles with a length of 4-10 mm have a scattering coefficient of about 0.7, and dipoles with a length of 63 mm are only 0.21.

 In FIG. Figure 2 shows the dependence of the scattering coefficient and the number of dipoles in a packet on their length.

 To increase the dispersibility coefficient in BWW, a shift was consciously made towards an increase in the number of DOs of a shorter length. So, in BWW, dipoles from 4 to 16 mm long in each biscuit are equipped with 500 thousand pieces. lengths from 18 to 37 mm, 130 thousand each. from 40 to 63 mm long to 60 thousand pieces. and lengths from 80 to 275 mm for 20 thousand pieces.

Due to the use of KDO-4/275 K (U), the probability of hitting concealed long-range, front-line and military transport aircraft by air defense systems in any theater of operations is sharply reduced. Moreover:
the outfit of aircraft suppliers of interference several times;
simplifies the provision of combat units using passive interference with limited intelligence, due to the complex suppression of currently known radars;
the reliability of products increases due to the use of new technology of picking, assembly and packaging; the total length of the dipoles in each pack is selected so that its fill factor is equal to one;
metal consumption of products decreases by about 30% due to a decrease in the width of the dipoles from the foil from 1 to 0.6 mm;
the cost of raw materials for the manufacture of products is reduced by reducing their nomenclature; -
reduced need for vehicles and storage volumes.

 Given the above, as well as the results of state special flight tests of 10.29.89, assessment tests of 07.27.89, we can conclude that the use of KDO-4/275 K (U) instead of mass-produced reflectors leads to a significant increase in tactical capabilities of the means electronic warfare.

In the course of these tests identified additional tactical and technical advantages of BWW, namely: -
increasing the duration of interference (clouds of reflectors) by 20-25 min; -
extension of interference in the range from 8 mm to 200 cm.

 For the manufacture and use of the proposed integrated dipole reflectors, all mass-produced materials are used without the organization of additional productions and regular aircraft reset means without special modifications.

Claims (2)

 1. A complex dipole reflector containing half-wave dipole reflectors made of foil and metallized fiberglass of various lengths, assembled in packs consisting of biscuits of different lengths, characterized in that, in order to increase the effective dispersion area when creating passive interference simultaneously in the operating wavelength range from 8 mm to 55 cm, the complex of dipole reflectors is made up of sets of three types, while the first set consists of four packs, the first of which contains fiberglass dipoles from 40 d in length 63 mm, and the remaining three packets of foil dipoles with lengths of 80 and 195, 120 and 155 mm, 275 mm, respectively, the second set consists of one packet of fiberglass dipoles with a length of 18 to 37 mm, the third set consists of one packet of dipoles fiberglass with a length of 4 to 16.5 mm, and the ratio of the number of dipole reflectors of long length (80 275 mm), medium length (40 63 mm) and short length (4 16.5 mm) is a number of numbers 1 9 90.  2. The reflector according to claim 1, characterized in that, in order to increase the efficiency of simultaneously suppressing radar stations for detecting and tracking targets, sets of the first, second and third types are arranged sequentially in the direction of ejection in the following order: first, second, first, third, first, second, first.

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