RU2233920C1 - Reflective knitted netted surface of antenna and method for manufacturing the same - Google Patents

Abstract

FIELD: manufacture of reflective surfaces of parabolic antennae.

SUBSTANCE: method involves knitting reflective surfaces by single or double weft knitting, regular or irregular pressed or single combined irregular fancy weavings, with metal threads preliminarily wound-around by textile threads or twisted with textile threads directly in knitting systems being used for knitting thereof; removing textile threads upon completing of knitting process. Single metal threads are micro wires of about 40 microns thickness. Metal threads are laid in knitted systems so that they form meshed field with meshes of different shape in reflective knitted netted surface of antenna, said field having repeated pattern of predetermined vertical and horizontal sizes. Average linear module of loops during manufacture of netted surface are δ i,j>60.

EFFECT: increased elasticity, reduced metal usage and labor intensity at knitting stage owing to elimination of thread warping operation.

4 cl, 10 dwg

Description

The invention relates to the field of manufacturing technology of reflective surfaces of parabolic antennas.

Known reflective mesh surface of the antenna, containing diamond-shaped cells made of metal filaments of warp knitted fillet weave, formed by a two-ribbed weave having oncoming masonry, with additional threads tied into them / 1 /.

Also known is the reflective surface of the antenna, containing a range of cells of various configurations and sizes, made by warp knitted double-ribbed platen or fillet weaves, the mesh surface being knitted from metal threads that are pre-wrapped with textile threads 5-16.7 Tex thick, and microfibre is used as elementary threads with a thickness of not more than 30 microns, while after knitting textile threads are removed by evaporation, dissolution or burning, and on the remaining frame is applied high covering coating by gilding or nickel plating / 2 /. This technical solution is selected as a prototype.

The disadvantages of these reflective elements of radio engineering systems in the first case are that the reflective surface consists of diamond-shaped cells of only one configuration and size, which makes it difficult to reflect radio waves of different frequency ranges, and the cell dimensions cannot be less than the height of the core of the knit loop.

In the second case, the manufacturing technology of a reflective surface is very laborious, since before knitting it requires a laborious technological operation of warping metal threads. In addition, individual refills of reflective surfaces made by plated warp knitted weaves are characterized by increased material consumption and insufficient elasticity.

The objective of the invention is to develop a cellular surface structure, which contains a whole range of cells of various configurations and sizes, is characterized by increased elasticity, reduced material consumption and reduced laboriousness of manufacture at the knitting stage due to the exclusion of warping operations.

The problem is solved due to the fact that the reflective knitted mesh surface made of warp knitted two-ribbed weaving of metal threads, which are used as microwires, and coated with high-conductivity metal by gilding or nickel plating, are performed by single or double, regular or irregular press or single combined irregular jacquard weaves.

A method for producing a reflective knitted mesh surface of an antenna in which metal threads are pre-wrapped with textile threads or cannabis with textile threads directly in knitting systems, and after knitting, textile threads are removed, while the metallic threads or metallic threads wrapped in textile are tucked together with textile threads into loop forming knitting systems machines and lay so that they form a mesh surface of a single or double, regular or irregular press or a single combined irregular jacquard weave, with microwire being used as a metal thread.

A method in which textile-wound metallic threads or metallic threads together with textile threads in knitting systems are laid so that in a reflective knitted mesh surface of the antenna they form a cell field of various shapes with a rapport whose horizontal dimensions are E _x = R _bmax × A,

, M_(R)=(R_h-Z), где E_x и Е_у - соответственно размеры раппортов сетчатой поверхности по горизонтали и вертикали;vertically

, M _(R) = (R _h -Z), where E _x and E _y are the sizes of the rapport of the mesh surface horizontally and vertically, respectively;

R _bmax - the largest rapport of laying threads along the width of the weave;

A is the looped step of the knitwear;

M _(R) - the number of loops in the loop column of the rapport of weaving in height;

In _i , respectively, the heights of the loops in the rapport formed during one loop formation cycle;

B _j - the heights of the loops in the rapport formed in more than one loop formation cycle;

R _H is the number of loop-forming systems needed to produce one pattern of weaving in height;

Z is the number of loops in the loop column of the rapport weave formed in more than one loop formation cycle.

The method in which the average values of the linear modules of the loops of the reflective knitted mesh surface of the antenna are σij> 60.

The claimed invention is illustrated by drawings.

Figure 1, a, b shows the structure and schedule of laying the threads of the reflective knitted mesh surface of the antenna, made by a single culinary regular press weave of tungsten microwire of circular cross section with a thickness of 15 μm in two additions, wrapped with two textile threads of linear density 8.4 Tex. The threads are tucked into the loop forming systems of the knitting machine and laid so that they form a mesh surface of a single culinary regular press weave, forming a cell field with rapport, the horizontal dimensions of which are E _x = 2A; vertically E _y = B _j , in which the average linear module of the loops of the reflective knitted mesh surface of the antenna is σ = 96.

In figure 1, a, b, the following notation:

I1, I2, I3, I4, I5, I6 - meshes of various sizes and configurations;

a, b, c, d, d, e, f, h, and, k, l, is a rapport of complex shape, inside of which an integer number of cells is formed by crossing the threads;

OVDZ - a rectangular frame of pattern repeat.

The arrows indicate the directions of movement along which the reflective mesh surface / 3 / is replaced by pattern repeats.

The values of E _x = 2A, E _y = B _j - numerically correspond to the width and height of the pattern repeat;

X, Y - the direction of the looped rows and looped posts;

A - looped knitwear step;

B _j - the height of the loop series;

R _H is the number of loop-forming systems needed to produce one pattern of weaving in height; R _H = 2;

R _b - rapport of laying the thread in width; R _b = 2;

H1, H2 - thread systems necessary for the formation of weave;

M _(R) is the number of loops in the buttonhole in the weave repeat equal to 2;

Z is the number of loops in the loop column of the rapport formed in more than one loop formation cycle and equal to 1;

i, j — indexation of loops of various heights;

O is the origin.

Figure 2, a, b shows the structure and the schedule of laying the threads of the reflective knitted mesh surface of the antenna, made by a single cooler irregular combined jacquard weave of tungsten microwires of circular cross section with a thickness of 15 μm in two additions, wrapped with two textile viscose complex threads of linear density 8.4 Tex. The threads are tucked into the loop forming systems of the knitting machine and laid so that they form the mesh surface of a single culinary irregular combined jacquard weave, forming a cell field with a rapport, the horizontal dimensions of which are E _x = 2A; vertically E _y = 2B _i + B _j , in which the average linear module of the loops of the reflective knitted mesh surface of the antenna is σ = 128.

Figure 2, a, b adopted the following notation:

Я1, Я2, Я3, Я4, ... Я16 - meshes of various sizes and configurations;

a, b, c, d, d, e, f, h, and, k, l, m, n, o — rapport of complex shape, inside of which an integer number of cells is formed by crossing the threads;

OPRS - rectangular frame pattern repeat.

The arrows show the directions of movement along which the reflective mesh surface is replaced by pattern repetitions / 3 /.

The values of E _x = 2A, E _y = 2B _i + B _j - numerically correspond to the width and height of the pattern repeat;

X, Y - the direction of the looped rows and looped posts;

A - looped knitwear step;

B _i , B _j - the height of the loop series;

R _H is the number of loop-forming systems needed to produce one pattern of weaving in height; R _H = 4;

R _bmax - the largest rapport of laying the thread in width; R _bmax = 2;

H1, H2, H3, H4 - thread systems necessary for the formation of weave;

M _(R) is the number of loops in the loop column of the weave repeat numerically equal to 3;

Z is the number of loops in the loop column of the rapport formed in more than one loop formation cycle and equal to 1;

i, j - loop indices of various heights;

O is the origin.

Figure 3, a, b shows the structure and schedule of laying the threads of the reflective knitted mesh surface of the antenna, made by a double culinary irregular combined press weave of gilded tungsten microwire of circular cross section with a thickness of 30 μm, which was tucked into each loop-forming system and was reed with tucked into each loop-forming system of textile complex diacetate thread of linear density 8.4 Tex and laid so that it formed a double culinary irregular presses e interlacing, forming meshes field rapport, which measures the horizontal E _x = A; vertically Е _у = 2В _i + b _j , in which the average value of the loop module of the reflective knitted mesh surface of the antenna is σ = 102.

Figure 3, a, b adopted the following notation:

Я1, Я2, Я3, ... Я14 - meshes of various sizes and configurations;

a, b, c, d, d, e, f, h, and, k, l, m, n, o, is a rapport of complex shape, inside of which an integer number of cells is formed by crossing the threads;

OPRS - rectangular frame pattern repeat.

The arrows show the directions of movement along which the reflective mesh surface is replaced by pattern repetitions / 3 /.

Values of E _x = A; E _y = B _j + 2B _i - numerically correspond to the width and height of the rapport of the double weave pattern;

X, Y - the direction of the looped rows and looped posts;

A - looped knitwear step;

In _i , B _j - the height of the loop series;

R _H - the number of loop-forming systems used to generate one row of weave; R _H = 4;

R _b - rapport of laying the thread in width; R _b = 1;

H1, H2, H3, H4 - thread systems necessary for the formation of weave;

M _(R) is the number of loops in the loop stitch of the weave, numerically equal to 3;

Z is the number of loops in the loop post formed in more than one loop formation cycle and equal to 1;

i, j - loop indices of various heights;

O is the origin.

Figure 4, a, b shows the structure and schedule of laying the threads of the reflective knitted surface of the antenna, performed by a single irregular press weave of steel microwire with a diameter of 20 μm, wrapped with two textile complex diacetate threads of linear density 8.4 Tex. The threads are tucked into the loop-forming systems of the knitting machine and laid so that they form the mesh surface of the culinary single irregular press weave, forming a cell field with rapport, the horizontal dimensions of which are E _x = 2A; vertical Е _у = 2В _i + B _j , in which the average linear module of the loop of the reflective knitted mesh surface of the antenna is σ = 116.

In figure 4, a, b, the following notation:

I ₁ , I ₂ , I ₃ , ... I ₁₃ - meshes of various sizes and configurations;

a, b, c, d, d, e, f, h, and, k, l, n, o — rapport of complex shape, inside of which an integer number of cells is formed by crossing the threads;

OPRS - rectangular frame of pattern repeat.

The arrows indicate the directions of movement along which the reflective mesh surface is replaced by pattern repeats.

Values of E _x = 2A; E _y = 2B _i + B _j - numerically correspond to the width and height of the pattern repeat;

X, Y - the direction of the looped rows and looped posts;

A - looped knitwear step;

In _i , B _j - the height of the loop series;

R _H is the number of loop-forming systems needed to produce one pattern of weaving in height;

R _bmax - the largest rapport of laying the thread in width;

Н1, Н2, Н3, Н4 - thread systems necessary for the formation of weave;

M _(R) is the number of loops in the loop column of the weave repeat equal to 3;

Z is the number of loops in the loop column of the rapport formed in more than one loop formation cycle and equal to 1;

i, j - loop indices of various heights;

O is the origin.

Figure 5, a, b shows the structure and schedule of laying the threads of the reflective knitted surface of the antenna, made of double regular regular press weave of steel microwires with a diameter of 20 μm, wrapped with two textile complex diacetate threads of linear density 8.4 Tex. The threads are threaded into the loop-forming systems of the knitting machine so that they form a double double regular press weave, forming a cell field with a rapport, the horizontal dimensions of which are E _x = A, vertical E _y = B _j , in which the average linear module of the loop is reflective knitted the mesh surface of the antenna is σ = 138.

In figure 5, a, b the following notation is accepted:

I ₁ , I ₂ , I ₃ , ... I ₆ - meshes of various sizes and configurations;

a, b, c, d, e, f, g, h, and, k - rapport of complex shape, inside of which an integer number of cells is formed by crossing the threads;

ODBZ - rectangular frame of pattern repeat.

The arrows indicate the directions of movement along which the reflective mesh surface is replaced by pattern repeats.

Values of E _x = A; E _y = In _j - numerically correspond to the width and height of the weave pattern;

X, Y - the direction of the looped rows and looped posts;

A - looped knitwear step;

B _i , B _j - the height of the loop rows;

R _H is the number of loop-forming systems used to generate one row of weave;

R _b - rapport of laying the thread in the weave in width;

Н1, Н2 - thread systems necessary for the formation of weaving;

M _(R) is the number of loops in the loop stitch of the weave, numerically equal to 1;

Z is the number of loops in the loop, formed in more than one loop formation and equal to 1;

i, j - loop indices of various heights;

O is the origin.

In the implementation of the reflective knitted mesh surface of the antenna, the structure of which is shown in Fig. 1a, a tungsten microwire of circular cross section with a thickness of 15 μm, wrapped with two textile viscose complex threads of linear density 8.4 Tex, was used as a metal thread.

In the development of the sample, a 24-class CAMBER single-loop circular knitting machine with a 26-inch cylinder diameter of the CHEMINIT model with 48 loop-forming systems was used. The loop forming systems were refueled, as shown in FIG. 1, b, with each even needle in the odd loop forming systems forming sketches, and the odd needle forming loops. And, on the contrary, in even loop-forming systems, the odd needles formed loops, and the even ones made sketches.

The depth of stopping threads in loop-forming systems was set so as to obtain the average value of the linear module of the loop σ = 96. After knitting, the textile thread was removed, and the fabric was gilded. When implementing the reflective knitted mesh surface of the antenna shown in Fig. 2, a, the same thread was used as in the development of the weave pattern shown in Fig. 1, a, b, and the same class 24 CHEMINIT circular knitting machine was used with a cylinder diameter of 26 inches. The loop forming systems were refueled and laid as shown in FIG. 2, b, with one weaving pattern formed in 4 loop forming systems; selector comb machines were installed so that in odd loop rows (1, 3, 5, 7), etc. looped rows of weaving were formed, and in even rows (2, 4, 6, 8), etc. - broaches through one needle with offset along even loop rows by 1 needle.

The depth of thread stopping in loop-forming systems was set so as to obtain the average value of the linear loop module σ = 128. The implementation of the reflective knitted mesh surface, the structure of which is shown in Fig. 3, a, was carried out on a 2-loop circular knitting machine of the “Multikomet” class 20 model with a cylinder diameter of 30 inches, having 72 knitting systems.

The loop-forming systems were installed so as to obtain the schedule for laying the threads shown in Fig. 3, b, and one weaving pattern was formed in four loop-forming systems. The gilded tungsten microwire of circular cross section with a thickness of 30 μm was used as a thread, which was tucked into each loop-forming system and reed, with a textile complex diacetate thread of linear density 8.4 Teks also refilled into each knitting system. The depth of culling in loop-forming systems was set to obtain the average value of the linear module of the loop produced at each needle bar - σ = 102.

After development, the knitted fabric was subjected to solvent treatment until the textile yarns were completely dissolved.

In the implementation of the reflective knitted mesh surface of the antenna, the structure of which is shown in Fig. 4a, a steel microwire with a diameter of 20 μm was used, wrapped with two textile diacetate complex threads of linear density 8.4 Tex. The sample was produced on a CAMBER single-loop circular knitting machine of the 24th class with a cylinder diameter of 26 inches, the CHEMINIT model, which has 48 loop-forming systems. The loop-forming systems were refueled in accordance with the graphic recording shown in Fig. 4, b. Even needles in the first system form sketches, and odd needles form loops. In the second and fourth systems, the formation of smoothness loops on all needles occurs. In the third system, sketches are formed on odd needles, and on even ones, loops. The depth of culling of threads in loop-forming systems was set so as to obtain the average value of the linear module of the loop σ = 116.

After knitting, the diacetate was dissolved, and the fabric was gilded.

The implementation of the reflective surface of the antenna, shown in figure 5, was performed on a double-loop circular knitting machine of the “Multikomet” class 20 model with a cylinder diameter of 30 inches having 72 knitting systems.

The loop-forming systems were installed so as to obtain in the first system sketches on all the needles of the disk, and on the needles of the cylinder — loops; and in the second system - sketches on all the needles of the cylinder, and on the needles of the disc - loops.

One weave pattern was formed in two systems. When developing samples of this weave, we used a steel microwire with a diameter of 20 μm in one addition, wrapped with two diacetate complex filaments of linear density 8.4 Tex. The depth of culling in loop-forming systems was established to obtain the average value of the linear module of the loop produced at each needle bar σ = 138. After knitting, the fabric was subjected to solvent treatment until the diacetate threads were completely dissolved.

Sources of information

1. RF patent No. 2157028 C1, 7 H 01 Q 15/00. July 23, 1999

2. RF patent No. 2198453 (application No. 2002100718/12).

3. Shalov I.I., Dalidovich A.S., Kudryavin L.A. Knitwear technology. M., Legprombytizdat, 1986, p.85, 91, 92. A textbook for university students.

Claims (4)

1. Reflective knitted mesh surface of the antenna made of warp knitted double-ribbed weaving of metal threads, in which microwire is used as a metal thread, while the surface of the antenna is coated with highly conductive metal by gilding or nickel plating, characterized in that the surface is made of single or double, regular or irregular press or single combined irregular jacquard weaves. 2. A method for producing a reflective knitted mesh surface of an antenna in which metal threads are pre-wrapped with textile threads or cannabis with textile threads directly in knitting systems, and after knitting, the textile threads are removed, characterized in that the twisted textile threads or metallic threads are tucked together with textile threads into the loop forming systems of the knitting machine and laid so that they form the mesh surface of a single or double, regular or irregular press or single combined irregular jacquard weave, while a microwire is used as a metal thread. 3. The method according to claim 2, in which the metal-wrapped textile threads or metallic threads together with textile threads in knitting systems are laid so that in a reflective knitted mesh surface of the antenna form a cell field of various shapes with a rapport, the horizontal dimensions of which are: Ex = Rbmax × A; vertically -

where Ex and Ey, respectively, the sizes of the rapports of the knitted mesh surface horizontally and vertically; Rbmax - the largest rapport of laying threads along the width of the weave; A is the looped step of the knitwear; M (R) - the number of loops in the loop column of the rapport of weaving in height; Bi — respectively, the heights of the loops in the rapport formed during one loop formation cycle; Bj — loop heights in rapport formed in more than one loop formation cycle; R _N - the number of loop-forming systems necessary to generate one pattern of weaving in height; Z is the number of loops in the loop column of the rapport weave formed in more than one loop formation cycle. 4. The method according to any one of claims 2 and 3, in which the average values of the linear modules of the loops of the reflective knitted mesh surface of the antenna are σi, j> 60, where i, j are the indices of the loops of different heights.

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