A preparation device and method suitable for various frequency band polarized grid

Abstract

This invention provides an apparatus and method for fabricating polarized grids suitable for multiple frequency bands. The apparatus includes a positioning plate, a mask, and a frame structure. The mask has symmetrical wire-winding positioning grooves on both sides of its edges. These grooves consist of a series of microgrooves used for guiding, positioning, and fixing the wire. By setting different groove widths and spacings on the mask, the invention can adapt to the different wire diameters and spacings required for various frequency band polarized grids. The fabrication method includes material preparation, installation of the frame structure and mask, wire winding and fixing, and polarized grid product fabrication. The advantages of the apparatus and method provided by this invention are that it only requires setting different groove widths and spacings on the mask to fabricate polarized grids with different wire diameters and spacings. Furthermore, it can adapt to the smaller wire diameter and spacing requirements of higher frequency band polarized grids. The mask, which serves as a guide, positioner, and wire fixer, is easier to process, has higher precision, and lower cost.

Description

Technical Field

[0001] This invention relates to the field of fabrication of quasi-optical polarized grids, and in particular to an apparatus and method for fabricating polarized grids suitable for multiple frequency bands. Background Technology

[0002] The polarization grid is a crucial component in quasi-optical feeding systems, its key functional structure consisting of a series of equally spaced metal wires. Ideally, when the incident electromagnetic wave's perpendicular polarization direction is parallel to the grid's wires, the perpendicularly polarized wave is reflected, while the horizontally polarized wave is completely transmitted. Therefore, it primarily functions as a means of electromagnetic wave polarization separation and frequency band separation in quasi-optical paths. The wire diameter and spacing of the polarization grid are related to its applicable frequency band. The higher the frequency band, the smaller the wire diameter and spacing of the corresponding polarization grid. Currently, domestic products mainly rely on imports for high-frequency polarization grids, especially in the terahertz band. Domestic research has also been conducted on polarization grid fabrication. Related winding methods often involve machining corresponding guide or fixing grooves on tooling or product frames to ensure stable wire positioning and spacing. However, with the increasing frequency band of polarization grids and the decreasing wire diameter and spacing, current domestic winding methods and tools are becoming increasingly difficult to implement from a manufacturing perspective, and are becoming increasingly unacceptable from a production cost perspective. Currently, the tooling and products used in manufacturing are often only designed for fixed frequency bands. When new frequency bands require different wire diameters and spacings, the tooling and equipment used in their fabrication often need to be redesigned and manufactured. There is a lack of a device and method that can be used to fabricate polarized grids for multiple frequency bands. Summary of the Invention

[0003] This invention addresses the problems of existing fabrication devices and methods in the manufacturing of polarized grids, including multi-band adaptability, manufacturability, winding precision control, and manufacturing cost. It provides a new, universal fabrication device and method applicable to various frequency bands of polarized grids. This method uses a single-layer foil or a multi-layer foil stacked combination as the mask, and then sets up a microgroove structure with winding positioning slots to meet the requirements of different wire diameters and spacings for various frequency bands of polarized grids. Furthermore, the microgroove structure of the mask made from foil is easier to manufacture, lower in cost, and more suitable for mass production. The higher precision of the groove structure allows for more accurate wire positioning and more uniform spacing during winding. By using a single-layer foil or a multi-layer foil stacked combination as the mask, and then setting up a microgroove structure with winding positioning slots, this device and method can adapt to the diverse requirements of various frequency bands of polarized grids for wire diameter and spacing.

[0004] To achieve the above objectives, the present invention provides a fabrication apparatus suitable for polarized grids of multiple frequency bands, comprising: a positioning plate, a mask, and a frame structure; the positioning plate is provided with an accommodating space for accommodating the frame structure; the frame structure is installed within the accommodating space, and winding start and stop components are provided at both ends of the side of the positioning plate; the mask is detachably mounted on the positioning plate; the frame structure includes an upper frame and a lower frame, which are detachably connected, and the frame structure is detachably connected to the positioning plate; the mask is provided with clearance holes to avoid the frame structure; the mask is located above the lower frame, and the height of the mask is below the upper frame; symmetrical winding positioning grooves are provided on both sides of the mask, and the winding positioning grooves are composed of a series of microgroove structures, the protrusions of the microgroove structures facing outwards of the mask, for guiding, positioning, and fixing the wire; by setting different groove widths and spacings of the microgroove structures on the mask, the requirements of different wire diameters and wire spacings for polarized grids of multiple frequency bands can be adapted.

[0005] Optionally, the mask is composed of a single layer of foil or multiple layers of foil stacked together. By changing the single layer of foil or multiple layers of foil stacked together with different groove widths and spacings, smaller groove widths and spacings are formed, thereby setting different groove widths and spacings of the micro-groove structure on the mask.

[0006] Optionally, the positioning plate is provided with a first mounting structure in the accommodating space, and the upper frame and the lower frame are respectively provided with through structures. The through structures cooperate with the mounting components to install the upper frame above the lower frame; the frame mechanism is installed on the positioning plate through the through structures and the first mounting structure, and cooperates with the mounting components.

[0007] Optionally, a second mounting structure is provided above the positioning plate, and a third mounting structure is provided above the mask. The mask is mounted on the positioning plate through the second mounting structure and the third mounting structure, in conjunction with the mounting component.

[0008] Optionally, the mask is prepared using a mask chemical etching method or a precision laser cutting process. Further, the present invention also provides a method for preparing polarized grids suitable for multiple frequency bands, characterized in that, using the above-mentioned apparatus for preparing polarized grids suitable for multiple frequency bands, it includes the following steps:

[0009] S1: Prepare the wire material, frame structure, positioning plate, and select the mask of the corresponding specifications. The selection of the mask is based on the fact that the groove width and spacing of the microgroove structure meet the requirements of the polarization grid for wire diameter and wire spacing.

[0010] S2: Install the lower frame onto the positioning plate, install the mask onto the positioning plate, with the mask positioned above the lower frame;

[0011] S3: Fix the starting end of the wire at one end of the winding start and stop piece. According to the winding positioning groove, the wire passes through the winding positioning groove on one side and then through the winding positioning groove on the other side. Repeat this winding process until the wire completely covers the lower frame area. Fix the end of the wire at the other end of the winding start and stop piece. Adhere the wire to the lower frame.

[0012] S4: Install the upper frame above the lower frame, seal the extension gap of the frame structure, remove excess wire, and complete the preparation of the polarized grid product.

[0013] Optionally, the filament is wound in an S-shaped manner, either around the front and back sides or between adjacent slots on one side.

[0014] Optionally, the filament is fixed around the winding start and stop members and reciprocated relative to the symmetrical groove of the mask.

[0015] Optionally, the mask can be wound manually or automatically with the aid of equipment.

[0016] Optionally, after the filament passes through the winding positioning groove, the filament is temporarily fixed with quick-drying adhesive at the contact position between the filament and the winding positioning groove, and the winding is performed after the adhesive has cured.

[0017] Compared with existing technologies, the polarized grid products prepared using the apparatus and method of this invention have the following advantages:

[0018] (1) This invention forms smaller slot widths and spacings by replacing single-layer foil or multi-layer foil stacked slot structures with different slot widths and spacings, and then sets different slot widths and spacings of micro-slot structures on the mask to adapt to the requirements of various frequency band polarization grids for different wire diameters and wire spacings. Compared with the traditional positioning guide slots on structural parts or product frames, this invention has higher processing and manufacturing precision, can achieve smaller wire widths and spacings, is easier to process, has lower costs, and is more convenient for mass production.

[0019] (2) The multi-layer foil stacking groove structure set by the present invention forms a smaller groove width and spacing, thereby improving the mask accuracy. The winding positioning groove on the mask plays a positioning and guiding role, making the wire position more accurate and the spacing more uniform during winding. At the same time, compared with the non-positioning groove structure that uses mechanical or other means to ensure the winding wire spacing, the winding positioning groove based on the high-precision mask as positioning and guidance results in higher quality consistency of winding wire spacing.

[0020] (3) The present invention forms smaller slot widths and spacings by replacing single-layer foil or multi-layer foil stacked slot structures with different slot widths and spacings, thereby setting different slot widths and spacings of micro-slot structures on the mask, so that the device and method can be applied to the diverse needs of polarization grid wire diameters and spacings in various frequency bands. Attached Figure Description

[0021] Figure 1 This is a diagram of a fabrication apparatus including a polarized grid provided in an embodiment of the present invention;

[0022] Figure 2 This is a structural diagram of the positioning plate provided in an embodiment of the present invention;

[0023] Figure 3 This is a mask structure diagram provided in an embodiment of the present invention;

[0024] Figure 4A , Figure 4B , Figure 4C This is a diagram of the microgroove structure on the mask provided in an embodiment of the present invention;

[0025] Figure 5 This is a structural diagram of the polarized grid product provided in an embodiment of the present invention;

[0026] Figure 6 This is a flowchart of the method for fabricating a polarized grid provided in an embodiment of the present invention;

[0027] Figure 7 This is a diagram of the polarized grid product after fabrication, provided in an embodiment of the present invention.

[0028] In the picture:

[0029] Mask 1

[0030] Positioning plate 2

[0031] Polarized grid products 3

[0032] Second installation structure 21

[0033] First mounting structure 22

[0034] Storage space 23

[0035] Handheld space 25

[0036] Wire winding start and stop parts 24

[0037] 12 clearance hole

[0038] Wire winding positioning groove 11

[0039] Third installation structure 13

[0040] upper frame 31

[0041] Lower frame 33

[0042] Fiber 32

[0043] First reinforcement piece 26

[0044] Second reinforcement 35 Detailed Implementation

[0045] A polarization grating is a frequency-selective surface with wide bandwidth characteristics. It is typically composed of a series of parallel metal lines, the width and spacing of which determine the performance of the polarization grating. When incident light is perpendicular to the polarization grating, only polarized light parallel to the grating lines can pass through, while polarized light perpendicular to the grating lines is reflected or absorbed. Thus, the polarization grating acts as a polarization filter, achieving selective transmission or reflection of polarized light.

[0046] When designing polarization grids, polarization grids for multiple frequency bands can be achieved by setting different wire widths and spacings.

[0047] The core of this invention lies in the fact that it achieves smaller slot widths and spacings by replacing single-layer or multi-layer foil stacked slot structures with different slot widths and spacings. This allows for the creation of micro-slot structures on the mask with varying slot widths and spacings, adapting to the different wire diameters and spacing requirements of various frequency band polarization grids. The invention's multi-layer foil stacked slot structure, with its staggered arrangement, results in smaller slot widths and spacings, leading to higher mask precision. The wire positioning slots on the mask, which act as positioning guides, ensure more accurate wire placement and more uniform spacing during winding. Furthermore, compared to non-positioning slot structures that rely on mechanical or other methods to maintain wire spacing, the high-precision mask's wire positioning slots provide better positioning and guidance, resulting in higher consistency in wire spacing quality.

[0048] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0049] This invention provides a fabrication apparatus for polarized grids suitable for multiple frequency bands, comprising: a positioning plate 2, a mask 1, and a frame structure;

[0050] The positioning plate 2 is provided with a accommodating space 23 to accommodate the frame structure; the frame structure is installed in the accommodating space 23, and the two ends of the side of the positioning plate 2 are provided with wire winding start and stop parts 24; the mask 1 is detachably installed on the positioning plate 2.

[0051] Please see Figure 2 This is a structural diagram of the positioning plate provided in an embodiment of the present invention.

[0052] In this embodiment, the positioning plate 2 is hollow in the middle and has a accommodating space 23. The frame structure can be detached and installed in the accommodating space 23. Furthermore, the positioning plate 2 has a handheld space 25 to facilitate the assembly and disassembly of the frame structure.

[0053] The positioning plate 2 has a first mounting structure 22 on the accommodating space 23 for fixing the frame structure. In this embodiment, the first mounting structure 22 is a pin hole, which cooperates with a cylindrical pin to fix the frame structure. Further, first reinforcing members 26 are provided on both sides of the first mounting structure 22 for reinforcing the frame structure. In this embodiment, the first reinforcing members 26 are threaded holes.

[0054] A second mounting structure 21 is provided above the positioning plate 2 for fixing the mask 1. In this embodiment, the second mounting structure 21 is a threaded hole, which is used to fix the mask 1 with a cylindrical pin.

[0055] The positioning plate 2 has winding start and stop components 24 on its side. The winding start and stop components 24 are located at both ends of the side and are used to fix the starting and ending ends of the wire during the winding process. They can also be used to transfer and fix the wire during the winding process. In this embodiment, the winding start and stop components 24 are pins.

[0056] The frame structure includes an upper frame 31 and a lower frame 33. The shapes of the upper frame 31 and the lower frame 33 are based on the design requirements of the polarized grid product. In this embodiment, the frame structure is hollow in the middle, and the upper frame 31 and the lower frame 33 are circular ring structures.

[0057] The upper frame 31 and the lower frame 33 are respectively provided with through structures 34. In this embodiment, the through structure 34 is a pin hole. The through structure 34, together with the cylindrical pin, installs the upper frame 31 above the lower frame 33. Furthermore, the through structure 34 is adapted to the first mounting structure 22. The through structure 34, together with the cylindrical pin, can install the frame structure on the positioning plate 2.

[0058] In this embodiment, the lower frame 33 is provided with second reinforcing members 35 on both sides of the through structure 34. The second reinforcing members 35 are adapted to the first reinforcing members 26. In this embodiment, the second reinforcing members 35 are screw holes. The first reinforcing members 26 and the second reinforcing members 35 cooperate with screws to reinforce the lower frame 33 on the positioning plate 2.

[0059] The mask 1 is provided with clearance holes 12 to avoid the frame structure; the upper frame 31 can be installed through the clearance holes 12, and the frame structure can also be removed. The mask 1 is located above the lower frame 33, and the height of the mask 1 is below the upper frame 31; a third mounting structure 13 is provided above the mask 1, and the third mounting structure 13 is adapted to the second mounting structure 21. The mask 1 is installed on the positioning plate 2 through the second mounting structure 21 and the third mounting structure 13, with the help of mounting parts. In this embodiment, the third mounting structure 13 is a screw hole.

[0060] Please see Figure 3 This is a mask structure diagram provided for an embodiment of the present invention.

[0061] In this embodiment, the mask 1 can be made of 0.05mm thick stainless steel strip (00Cr17Ni14Mo2). Symmetrical wire winding positioning grooves 11 are provided on both sides of the mask 1. The wire winding positioning grooves 11 are composed of a series of micro-groove structures. The protrusions of the micro-groove structures face the outside of the mask 1, which are used to guide, position and fix the wire 32, and also facilitate the stacking of micro-groove structures.

[0062] Please see Figure 4A , Figure 4B , Figure 4C This is a diagram of the microgroove structure on the mask provided in an embodiment of the present invention.

[0063] Mask 1 is composed of a single layer of foil or multiple layers of foil stacked together. By replacing the single layer of foil or multiple layers of foil stacked together with different slot widths and spacings, smaller slot widths and spacings are formed. In this way, different slot widths and spacings of micro-slot structures on the mask can be set to adapt to the requirements of various frequency band polarization grids for different wire diameters and wire spacings.

[0064] Please see Figure 4C The image provided is a side view of the microgroove structure when multiple foil sheets are stacked, which is a mask provided for an embodiment of the present invention.

[0065] In this embodiment, the mask 1 is composed of two layers of foil stacked together. The spacing of the single-layer microgroove structure is set to W2, and the groove width of the single-layer microgroove structure is set to W1. By stacking the two layers of foil, the groove structure is misaligned to form a smaller groove width W1' and spacing W2'.

[0066] To illustrate the specific implementation of the present invention in detail, the following embodiments are provided.

[0067] Example 1:

[0068] Please see Figure 4A This is a microgroove structure diagram provided for an embodiment of the present invention when the mask is a single-layer foil.

[0069] In this embodiment, the mask 1 is a single-layer foil structure, and the wire winding positioning groove 11 is composed of a single-layer microgroove structure. The positioning groove width of the single-layer microgroove structure is not less than the wire diameter, and the spacing of the single-layer microgroove structure is configured to meet the requirements of the polarization grid for the wire spacing.

[0070] In this embodiment, a large-diameter surface product is selected for the fabrication of a product with a maximum frequency of 118 GHz. The product has a wire diameter of 0.2 mm, a wire pitch of 0.5 mm, and a diameter of φ140 mm.

[0071] To meet the requirements of the polarization grid for the aforementioned frequency band in terms of wire diameter and wire spacing, the wire winding positioning groove 11 on one side of the mask 1 is composed of 290 micro-groove structures. The spacing between the micro-groove structures is the wire spacing W2, and the positioning groove width W1 of the micro-groove structure is not less than the wire diameter. For example, W1 = 0.25mm, W2 = 0.5mm, and the dimensions and machining accuracy of the groove hole structure on the mask 1 are ±0.01mm.

[0072] Example 2:

[0073] Please see Figure 4B The mask provided for the embodiment of the present invention is a three-dimensional view of the microgroove structure when multiple foil sheets are stacked.

[0074] In this embodiment, the mask 1 is a multi-layer foil stacked combination, and the single-layer microgroove structure is stacked to form a series of microgroove structures. The positioning groove width and spacing of each layer of microgroove structure can be the same or different. The wire winding positioning groove 11 is composed of a series of microgroove structures. The positioning groove width of the series of microgroove structures is not less than the wire diameter, and the spacing of the series of microgroove structures meets the requirements of the polarization grid of the applicable frequency band for the wire spacing.

[0075] In this embodiment, a large-diameter surface product is selected for the fabrication of a product with a maximum frequency of 500 GHz. The product has a wire diameter of 0.05 mm, a wire pitch of 0.15 mm, and a diameter of φ140 mm.

[0076] To meet the requirements of the above-mentioned frequency band polarization grid for wire diameter and wire spacing, a wire winding positioning groove 11 on one side is set up by stacking two identical micro-groove structures of 290 each. The positioning groove width of a single layer micro-groove structure is 0.35 mm, and the spacing is 0.15 mm. The spacing of the stacked micro-groove structures is wire spacing W2 = 0.15 mm. The positioning groove width of the series micro-groove structures is not less than the wire diameter, W1 = 0.1 mm. The two layers of mask 1 are stacked with a 0.25 mm misalignment.

[0077] Example 3:

[0078] The multi-layer foil stacking structure set in this embodiment has higher mask precision. The micro-groove structure on the high-precision mask makes the wire position more accurate and the spacing more uniform during winding. The high-precision winding positioning groove can play a positioning and guiding role, achieving higher quality consistency of winding wire spacing.

[0079] In this embodiment, a polarization grid is fabricated for frequencies up to 1 THz, with a wire diameter of 0.03 mm, a wire pitch of 0.075 mm, and an aperture of φ50 mm. Fabricating a polarization grid of this specification is extremely difficult in China. This device can fabricate a polarization grid of this specification and achieve consistent quality in the wire pitch during winding.

[0080] To meet the requirements of the polarization grid for wire diameter and wire spacing in the above frequency band, the mask is composed of two layers of paddles stacked together to form a stacked combination structure of wire positioning grooves. The wire positioning groove 11 on one side is formed by stacking two identical layers of paddles, each with 220 micro-groove structures. The positioning groove width of a single layer of micro-groove structure is 0.175 mm, and the spacing is 0.075 mm. The spacing of the series of micro-groove structures formed by stacking is the wire spacing W2 = 0.075 mm. The positioning groove width of the series of micro-groove structures is not less than the wire diameter, W1 = 0.05 mm. The two layers of mask 1 are stacked with a misalignment of 0.125 mm.

[0081] In one alternative embodiment, mask 1 is prepared by a mask chemical etching method.

[0082] In one alternative implementation, the mask 1 is prepared using a precision laser cutting process.

[0083] This invention also provides a method for fabricating polarized grids applicable to multiple frequency bands, using an apparatus for fabricating polarized grids in multiple frequency bands, the method comprising the following steps:

[0084] S1: Prepare wire material 32, frame structure, positioning plate 2, and select a mask of the corresponding specifications. The selection of the mask is based on the fact that the groove width and spacing of the microgroove structure meet the requirements of the polarization grid for wire diameter and wire spacing.

[0085] S2: Install the lower frame 33 on the positioning plate 2, and install the mask 1 on the positioning plate 2. The mask 1 is located above the lower frame 33.

[0086] S3: Fix the starting end of the wire 32 at one end of the winding start and stop member 24. According to the winding positioning groove 11, the wire 32 passes through the winding positioning groove 11 on one side and then through the winding positioning groove 11 on the other side. Repeat this winding process until the wire 32 completely covers the area of ​​the lower frame 33. Fix the end of the wire 32 at the other end of the winding start and stop member 24. Adhere the wire 32 to the lower frame 33.

[0087] S4: Install the upper frame 31 above the lower frame 33, seal the extension gap of the frame structure, remove excess wire 32, and complete the preparation of the polarized grid product.

[0088] Please see Figure 6The flowchart illustrates the fabrication method of the polarized grid provided in this embodiment of the invention.

[0089] In this embodiment, the design is based on the polarized grid product.

[0090] S1: Prepare 0.05mm tungsten wire as wire material 32, upper frame 31 and lower frame 33 of frame structure, positioning plate 2, mask 1 of single-layer foil, the groove width of the micro-groove structure of mask 1 is not less than the wire diameter, and the spacing meets the requirements of polarized grid products for wire spacing.

[0091] S2: The lower frame 33 is mounted on the positioning plate 2 via the through structure 34, the first mounting structure 22, and the mounting component. Further, the lower frame 33 is reinforced on the positioning plate 2 via the second reinforcing member 35, the first reinforcing member 26, and the mounting component. In this embodiment, the through structure 34 is a pin hole, the first mounting structure 22 is a threaded hole, and it is fixed to the positioning plate 2 by threaded nails. The second reinforcing member 35 is a screw hole, and the first reinforcing member 26 is a threaded hole, and it is reinforced by threaded nails. The mask 1 is mounted on the positioning plate 2 via the third mounting structure 13, the second mounting structure 21, and the mounting component. The mask 1 is located above the lower frame 33.

[0092] S3: The starting and ending points of the winding wire 32 are fixed at one end of the winding start and stop member 24. According to the winding positioning groove 11, the wire 32 passes through the winding positioning groove 11 on one side, is tensioned and pressed onto the mask 1 and the positioning plate 2, and then passes through the winding positioning groove 11 on the other side. Further, after each time the wire 32 passes through the winding positioning groove 11, 502 quick-drying adhesive is applied to the contact position between the wire 32 and the winding positioning groove 11 to temporarily fix the wire 32. After the adhesive cures, the winding is carried out again. This winding is repeated until the wire 32 completely covers the area of ​​the lower frame 33. Epoxy adhesive is used to bond the wire 32 to the lower frame 33.

[0093] In one alternative embodiment, the wire 32 is wound in an S-shape, either around the front and back sides or between adjacent slots on one side.

[0094] In one alternative embodiment, when the winding positioning grooves 11 are dense to a certain extent, it is difficult to wind through the spacing between adjacent grooves. The wire 32 is fixed by passing around the winding start and stop member 24 as a transit point, and reciprocates winding the winding positioning grooves 11 symmetrical with respect to the mask 1.

[0095] In one alternative implementation, the mask is wound manually or automatically with the aid of equipment to wind the filament 32.

[0096] S4: After the epoxy adhesive on the lower frame 33 has cured, remove the screws that fix the lower frame 33 to the positioning plate. The upper frame 31 is installed above the lower frame 33 through the through structure 34 and with the help of the pins. At this time, the wire 32 is fixed between the lower frame 33 and the upper frame 31. The outer gap of the frame structure is sealed with silicone rubber. After the silicone rubber has cured, remove the excess wire 32 and adhesive. This completes the preparation of the polarized grid product 3.

[0097] Please see Figure 7 This is a product image of the polarized grid after fabrication, provided as an embodiment of the present invention.

[0098] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for producing a polar grid suitable for use in a plurality of frequency bands, characterized in that include: Positioning plate, mask, frame structure; The positioning plate is provided with a space for accommodating the frame structure; The frame structure is installed within the accommodating space, and the positioning plate has wire winding start and stop parts at both ends of its side; the mask is detachably installed on the positioning plate. The frame structure includes an upper frame and a lower frame, which are detachably connected. The frame structure is detachably connected to the positioning plate. The mask is provided with clearance holes for the clearance frame structure; the mask is located above the lower frame, and the height of the mask is below the upper frame; the two sides of the mask are provided with symmetrical wire winding positioning grooves, which are composed of a series of micro-groove structures. The protrusions of the micro-groove structures face the outside of the mask and are used for guiding, positioning and fixing the wire. By setting different groove widths and spacings of the micro-groove structures on the mask, the requirements of various frequency band polarization grids for different wire diameters and wire spacings can be adapted; the mask is composed of a single layer of foil or multiple layers of foil stacked together. By replacing the single layer of foil or multiple layers of foil stacked together with different groove widths and spacings, smaller groove widths and spacings are formed, thereby setting different groove widths and spacings of the micro-groove structures on the mask.

2. The apparatus for preparing a polarizing grid suitable for use in a multi-band polarizing grid according to claim 1, wherein The positioning plate is provided with a first mounting structure in the accommodating space. The upper frame and the lower frame are respectively provided with through structures. The through structures cooperate with the mounting components to install the upper frame above the lower frame. The frame structure is installed on the positioning plate through the through structures and the first mounting structure, in cooperation with the mounting components.

3. The device for making a polar grid suitable for use in a polar grid network of multiple frequency bands according to claim 1, characterized in that, A second mounting structure is provided above the positioning plate, and a third mounting structure is provided above the mask. The mask is mounted on the positioning plate through the second mounting structure and the third mounting structure, in conjunction with the mounting component.

4. The apparatus for fabricating polarized grids suitable for multiple frequency bands according to claim 1, characterized in that, The mask is prepared using a mask chemical etching method or a precision laser cutting process.

5. A method for fabricating polarized grids applicable to multiple frequency bands, characterized in that, Using the fabrication apparatus for multi-band polarized grids according to any one of claims 1-4, the method comprises the following steps: S1: Prepare the wire material, frame structure, positioning plate, and select the mask of the corresponding specifications. The selection of the mask is based on the fact that the groove width and spacing of the microgroove structure meet the requirements of the polarization grid for wire diameter and wire spacing. S2: Install the lower frame onto the positioning plate, install the mask onto the positioning plate, with the mask positioned above the lower frame; S3: Fix the starting end of the wire at one end of the winding start and stop piece. According to the winding positioning groove, the wire passes through the winding positioning groove on one side and then through the winding positioning groove on the other side. Repeat this winding process until the wire completely covers the lower frame area. Fix the end of the wire at the other end of the winding start and stop piece. Adhere the wire to the lower frame. S4: Install the upper frame above the lower frame, seal the extension gap of the frame structure, remove excess wire, and complete the preparation of the polarized grid product.

6. The method for fabricating polarized grids applicable to multiple frequency bands according to claim 5, characterized in that, The wire is wound in an S-shaped manner, either around the front and back sides or between adjacent slots on one side.

7. The method for fabricating polarized grids applicable to multiple frequency bands according to claim 5, characterized in that, The filament is fixed around the winding start and stop members and is reciprocated relative to the symmetrical groove of the mask.

8. The method for fabricating polarized grids applicable to multiple frequency bands according to claim 5, characterized in that, The filament is wound manually or automatically with the aid of equipment.

9. The method for fabricating polarized grids applicable to multiple frequency bands according to claim 5, characterized in that, After the filament passes through the winding positioning groove, the filament is temporarily fixed with quick-drying adhesive at the contact position between the filament and the winding positioning groove. The winding is then performed after the adhesive has cured.

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