Radio frequency power division network based on waveguide cut-off mode electromagnetic weight reduction technology

Abstract

The invention discloses a radio frequency power division network based on a waveguide cut-off mode electromagnetic weight reduction technology, belongs to the technical field of microwaves, and solves the problem that a weight reduction cavity in a conventional punching technology is easy to form electroplating liquid residues. The one-to-sixteen radio frequency power division network is formed by sequentially stacking a first metal cover plate layer, a sixteen-path radio frequency power division layer, a second metal cover plate layer, an eight-path radio frequency power division layer and a third metal cover plate layer, and a double-I-shaped waveguide cavity machined on the eight-path radio frequency power division layer is communicated with a weight reduction cavity through a cut-off mode waveguide. The waveguide cavity is communicated with the atmosphere through the waveguide cavity, the phenomena that electroplating is inconvenient and electroplating liquid residues are easily formed due to the fact that the weight reduction cavity is connected with the atmosphere through the small exhaust holes in the conventional punching technology are avoided, and compared with the conventional punching technology, the process is simple and convenient, and the manufacturing cost is lower.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology and relates to a radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology. Background Art

[0002] Metal waveguides have been widely used in microwave systems in the fields of satellite, airborne, communication, information confrontation, etc. due to their outstanding advantages such as low loss, high radiation efficiency, large power capacity, good thermal conductivity and stable performance. However, with the continuous increase in demand, the disadvantages of metal waveguides in structure and weight are becoming increasingly apparent, which is contrary to the current design requirements of lightweight communication systems.

[0003] Metal waveguide structures usually exist in microwave systems in the form of array antennas or complex RF power division networks. Solid metal parts may exist between adjacent waveguide cavities. Traditional weight reduction methods often hollow out the inside of solid metal, which will face many new challenges and increase costs during engineering implementation.

[0004] Taking the processing and manufacturing of complex waveguide RF power division networks as an example, its implementation process usually includes three steps: 1) Conducting layered design according to the network structure, and machining the waveguide cavity and weight-reducing cavity. The waveguide cavity and the weight-reducing cavity are usually separated by a metal partition; 2) Using vacuum welding to weld the multi-layer structure into an integrated whole; 3) Using electroplating to treat the surface of the metal waveguide structure to meet the requirements of surface protection and environmental adaptability.

[0005] In the processing of traditional waveguide RF networks, in order to avoid structural deformation caused by the pressure difference between the inside and outside during welding, it is necessary to punch holes in the metal cover of the weight-reducing cavity to allow the weight-reducing cavity and the atmosphere to pass through. In some special cases, such as when the structure is particularly complex, it may not be possible to perform a punching design. In addition, during the subsequent electroplating process, if the plating liquid enters the weight-reducing cavity from the exhaust hole, it will be difficult to flow out, resulting in residue. The presence of residual excess is strictly prohibited for major engineering applications such as aerospace. Summary of the invention

[0006] The technical solution of the present invention is used to solve the problem that the weight-reducing cavity in the conventional punching technology is prone to form electroplating liquid residue.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The invention provides a radio frequency power division network based on waveguide cut-off mode electromagnetic weight reduction technology, wherein a first metal cover plate layer, a sixteen-way radio frequency power layer, a second metal cover plate layer, an eight-way radio frequency power layer and a third metal cover plate layer are stacked together in sequence from top to bottom; a double I-shaped waveguide cavity processed on the eight-way radio frequency power layer is connected to a weight reduction cavity by a cut-off mode waveguide; the cut-off mode waveguide comprises: a rectangular waveguide, two first metal ridges and two second metal ridges; the two first metal ridges are symmetrically arranged at one end of the rectangular waveguide connected to the weight reduction cavity, and the two second metal ridges are symmetrically arranged at one end of the rectangular waveguide connected to the double I-shaped waveguide cavity; a radio frequency signal is fed from a power division network total port on the third metal cover plate layer into the double I-shaped waveguide cavity of the eight-way radio frequency power layer, and then fed into the first rectangular waveguide cavity on the sixteen-way radio frequency power layer through a third rectangular opening on the second metal cover plate layer, and finally reaches the branch port of the sixteen-way power division network on the first metal cover plate layer.

[0009] Furthermore, 16 first rectangular openings are formed on the first metal cover layer, and the 16 first rectangular openings are arranged into an array of 4 rows and 4 columns, and the 16 first rectangular openings serve as branch ports of the 16-way power division network.

[0010] Furthermore, eight first rectangular waveguide cavities are processed on the sixteen-channel RF power layer, and the eight first rectangular waveguide cavities are symmetrically arranged on the upper and lower sides of the sixteen-channel RF power layer. The four first rectangular waveguide cavities on each side are adjacently arranged at equal distances, and the exteriors of the eight first rectangular waveguide cavities are all hollowed out to form a first weight-reducing cavity.

[0011] Furthermore, 16 first rectangular openings are provided on the first metal cover layer, and the 16 first rectangular openings provided on the first metal cover layer are aligned vertically with output ports at both ends of eight first rectangular waveguide cavities processed on the sixteen-channel RF power layer.

[0012] Furthermore, the third rectangular opening opened on the second metal cover plate layer is vertically aligned with the middle input port of the first rectangular waveguide cavity processed on the sixteen-channel RF power layer.

[0013] Furthermore, two I-shaped waveguide cavities, one second rectangular waveguide cavity, two convex-shaped weight-reducing cavities, two rectangular weight-reducing cavities and four cut-off mode waveguides are processed on the eight-way RF power layer; the two I-shaped waveguide cavities are symmetrically arranged on the left and right sides of the eight-way RF power layer, the second rectangular waveguide cavity is arranged in the middle of the eight-way RF power layer, and the two I-shaped waveguide cavities are connected by the second rectangular waveguide cavity to form a double I-shaped waveguide cavity; the outside of the double I-shaped waveguide cavity is completely hollowed out to form two convex-shaped weight-reducing cavities symmetrical up and down. cavity and a rectangular weight-reducing cavity that is symmetrical on both sides; the rectangular weight-reducing cavity on the left side of the eight-way RF power layer is connected to the I-shaped waveguide cavity on the left side by a cutoff mode waveguide, the rectangular weight-reducing cavity on the right side of the eight-way RF power layer is connected to the I-shaped waveguide cavity on the right by a cutoff mode waveguide, the convex-shaped weight-reducing cavity above the eight-way RF power layer is connected to the second rectangular waveguide cavity in the middle by a cutoff mode waveguide, and the convex-shaped weight-reducing cavity below the eight-way RF power layer is connected to the second rectangular waveguide cavity in the middle by a cutoff mode waveguide.

[0014] Furthermore, two second rectangular openings opened on the second metal cover layer connect the first weight-reducing cavity on the sixteen-way RF power layer with the two convex-shaped weight-reducing cavities on the eight-way RF power layer.

[0015] Furthermore, a third rectangular opening formed on the second metal cover layer is vertically aligned with output ports of the two I-shaped waveguide cavities.

[0016] Furthermore, a fourth rectangular opening is provided at the center of the third metal cover layer, and the fourth rectangular opening serves as the main port of the power division network. The center of the fourth rectangular opening is vertically aligned with the central input port of the second rectangular waveguide cavity.

[0017] Furthermore, the opening width of the rectangular waveguide is smaller than the cavity width of the double I-shaped waveguide cavity.

[0018] The advantages of the present invention are:

[0019] The double I-shaped waveguide cavity and the weight reduction cavity of the RF power division network based on the waveguide cutoff mode electromagnetic weight reduction technology of the present invention are connected by a section of cutoff mode waveguide, so that the weight reduction cavity is connected to the atmosphere through the waveguide cavity, avoiding the inconvenience of electroplating and easy formation of electroplating liquid residue caused by the connection of the weight reduction cavity with the atmosphere through the exhaust hole in the conventional punching technology. Compared with the conventional punching technology, the process of the present invention is simple and the manufacturing cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0021] Figure 2is a main perspective view of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0022] Figure 3 4 is a front view of a first metal cover plate layer of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0023] Figure 4 This is a front view of a sixteen-channel radio frequency power division layer of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0024] Figure 5 It is a top view of sixteen-channel radio frequency power division layers of a radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0025] Figure 6 4 is a front view of a second metal cover layer of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0026] Figure 7 This is a front view of an eight-way radio frequency power division layer of a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0027] Figure 8 It is a top view of eight-way radio frequency power division layers of a radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0028] Fig. 9 is a top view of the third metal cover layer of the radio frequency power division network based on the waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0029] Fig.10 It is a front perspective view of a cut-off mode waveguide used in a radio frequency power division network based on a waveguide cut-off mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0030] Fig.11 is a top view of a cutoff mode waveguide used in a radio frequency power division network based on a waveguide cutoff mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0031] Fig.12 It is a cross-sectional side view of a cut-off mode waveguide used in a radio frequency power division network based on a waveguide cut-off mode electromagnetic weight reduction technology according to an embodiment of the present invention;

[0032] Fig.13 is a comparison diagram of transmission coefficient simulation curves of a cutoff mode waveguide and a conventional waveguide used in an embodiment of the present invention;

[0033] Fig.14 It is a structural comparison diagram of the one-to-sixteen radio frequency power division network using conventional punching technology and the cutoff mode waveguide connection technology of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] Embodiment 1

[0037] like Figure 1 and Figure 2 As shown, the radio frequency power division network based on the waveguide cutoff mode electromagnetic weight reduction technology of the embodiment of the present invention includes a five-layer structure, which is: a first metal cover layer (10), a sixteen-way radio frequency power layer (20), a second metal cover layer (30), an eight-way radio frequency power layer (40), and a third metal cover layer (50); the first metal cover layer (10), the sixteen-way radio frequency power layer (20), the second metal cover layer (30), the eight-way radio frequency power layer (40), and the third metal cover layer (50) are stacked closely together from top to bottom.

[0038] like Figure 3 As shown, the first metal cover layer (10) is provided with 16 first rectangular openings (101), the 16 first rectangular openings (101) are arranged into an array of 4 rows and 4 columns, and the 16 first rectangular openings (101) serve as branch ports of the power division network.

[0039] like Figure 4 and Figure 5 As shown, eight first rectangular waveguide cavities (201) are processed on the sixteen-channel radio frequency power layer (20), and the eight first rectangular waveguide cavities (201) are symmetrically arranged on the upper and lower sides of the sixteen-channel radio frequency power layer (20), and the four first rectangular waveguide cavities (201) on each side are arranged at equal distances between adjacent ones, and the exteriors of the eight first rectangular waveguide cavities (201) are all hollowed out to form a first weight-reducing cavity (202), and the weight-reducing cavity serves to perform a lightweight design on the power division network.

[0040] like Figure 3 and Figure 4 As shown, the 16 first rectangular openings (101) opened on the first metal cover plate layer (10) are aligned vertically with the output ports at both ends of the 8 first rectangular waveguide cavities (201) processed on the 16-channel radio frequency power layer (20).

[0041] like Figure 6 As shown, the second metal cover plate layer (30) is provided with two second rectangular openings (301) and eight third rectangular openings (302).

[0042] like Figure 4 , Figure 6 and Figure 7 As shown, the eight third rectangular openings (302) opened on the second metal cover layer (30) are respectively aligned vertically with the middle input ports of the eight first rectangular waveguide cavities (201) processed on the sixteen-channel radio frequency power layer (20); and the eight third rectangular openings (302) opened on the second metal cover layer (30) are respectively aligned vertically with the eight output ports of the two I-shaped waveguide cavities (401).

[0043] like Figure 4 , Figure 6 and Figure 7 As shown, two second rectangular openings (301) opened on the second metal cover plate layer (30) connect the first weight reduction cavity (202) on the sixteen-way radio frequency power layer (20) with the two convex-shaped weight reduction cavities (403) on the eight-way radio frequency power layer (40).

[0044] like Figure 7 and Figure 8As shown, the eight-way radio frequency power layer (40) is processed with two I-shaped waveguide cavities (401), one second rectangular waveguide cavity (402), two convex-shaped weight reduction cavities (403), two rectangular weight reduction cavities (404) and four cut-off mode waveguides (405); the two I-shaped waveguide cavities (401) are symmetrically arranged on the left and right sides of the eight-way radio frequency power layer (40), the second rectangular waveguide cavity (402) is arranged in the middle of the eight-way radio frequency power layer (40), and the two I-shaped waveguide cavities (401) are connected by the second rectangular waveguide cavity (402) to form a complete and connected double I-shaped waveguide cavity; the exterior of the double I-shaped waveguide cavity is completely hollowed out to form two convex-shaped weight reduction cavities (403) that are symmetrical up and down, so as to form a double I-shaped waveguide cavity (405). and a rectangular weight-reducing cavity (404) that is symmetrical on both sides; the rectangular weight-reducing cavity (404) on the left side of the eight-way radio frequency power layer (40) is connected to the I-shaped waveguide cavity (401) on the left side by a cut-off mode waveguide (405); the rectangular weight-reducing cavity (404) on the right side of the eight-way radio frequency power layer (40) is connected to the I-shaped waveguide cavity (401) on the right side by a cut-off mode waveguide (405); the convex-shaped weight-reducing cavity (403) above the eight-way radio frequency power layer (40) is connected to the second rectangular waveguide cavity (402) in the middle by a cut-off mode waveguide (405); and the convex-shaped weight-reducing cavity (403) below the eight-way radio frequency power layer (40) is connected to the second rectangular waveguide cavity (402) in the middle by a cut-off mode waveguide (405).

[0045] like Fig. 9 As shown, a fourth rectangular opening (501) is provided at the center of the third metal cover layer (50), and the fourth rectangular opening (501) serves as the main port of the power division network. The center of the fourth rectangular opening (501) is vertically aligned with the center input port of the second rectangular waveguide cavity (402).

[0046] like Figures 10 to 12 As shown, the cutoff mode waveguide (405) comprises: a rectangular waveguide (4051), two first metal ridges (4052), and two second metal ridges (4053); the two first metal ridges (4052) are symmetrically arranged at one end of the rectangular waveguide (4051) connected to the weight-reducing cavity, and the two second metal ridges (4053) are symmetrically arranged at one end of the rectangular waveguide (4051) connected to the double I-shaped waveguide cavity; the opening width of the rectangular waveguide (4051) is smaller than the cavity width of the double I-shaped waveguide cavity; the high ends of the first metal ridge (4052) and the second metal ridge (4053) are lower than the height of the rectangular waveguide (4051); the sizes of the rectangular waveguide (4051), the first metal ridge (4052), and the second metal ridge (4053) are adjustable, so as to prevent electromagnetic waves from leaking from the waveguide cavity into the weight-reducing cavity.

[0047] The working principle of the radio frequency power division network based on the waveguide cutoff mode electromagnetic weight reduction technology of the embodiment of the present invention is as follows: the radio frequency signal is fed into the double I-shaped waveguide cavity of the eight-way radio frequency power layer (40) through the fourth rectangular opening (501) (i.e., the total port of the power division network), and then fed into the eight first rectangular waveguide cavities (201) on the sixteen-way radio frequency power layer (20) through the eight third rectangular openings (302) on the second metal cover layer (30), and finally reaches the sixteen first rectangular openings (101) on the first metal cover layer (10) (the port of the power division network), thereby achieving a one-to-sixteen effect.

[0048] like Fig.13 As shown, it is a comparison diagram of the transmission coefficient simulation curves of the cutoff mode waveguide and the conventional waveguide used in the embodiment of the present invention; the figure shows that the conventional waveguide has good transmission characteristics in the frequency range of f1 to f5. After the cutoff mode waveguide is inserted, the electromagnetic waves in the specific frequency band cannot be transmitted, and the connectivity is retained. In the process of reducing the weight of the complex waveguide network, inserting the cutoff mode waveguide can effectively ensure that the internal and external air pressures are equal, and no residue will be formed after the plating liquid enters the cavity.

[0049] like Fig.14 As shown, small holes are opened on the cover plate of the weight-reducing cavity using conventional punching connection technology to avoid structural deformation caused by inconsistent internal and external air pressures during welding. The processing technology is slightly complicated during actual engineering implementation, and it is easy to form a problem of residual electroplating liquid. The present invention uses a cutoff mode waveguide to connect the waveguide cavity and the weight-reducing cavity, so that the weight-reducing cavity is connected to the atmosphere through the waveguide cavity, which can avoid the problem of inconvenience for electroplating and easy formation of residual electroplating liquid when the weight-reducing cavity is connected to the atmosphere through the exhaust holes in the traditional weight-reduction method. At the same time, the present invention can also solve the problem that it is inconvenient to design exhaust holes when the waveguide power division network structure is extremely complex.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology, characterized in that: The first metal cover layer, the sixteen-way RF power layer, the second metal cover layer, the eight-way RF power layer, and the third metal cover layer are stacked together in sequence; the double I-shaped waveguide cavity processed on the eight-way RF power layer is connected to the weight reduction cavity by a cutoff mode waveguide; the cutoff mode waveguide includes: a rectangular waveguide, two first metal ridges, and two second metal ridges; the two first metal ridges are symmetrically arranged at one end of the rectangular waveguide connected to the weight reduction cavity, and the two second metal ridges are symmetrically arranged at one end of the rectangular waveguide connected to the double I-shaped waveguide cavity; the RF signal is fed from the total port of the power division network on the third metal cover layer into the double I-shaped waveguide cavity of the eight-way RF power layer, and then fed into the first rectangular waveguide cavity on the sixteen-way RF power layer through the third rectangular opening on the second metal cover layer, and finally reaches the branch port of the sixteen-way power division network on the first metal cover layer.

2. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 1 is characterized in that: The first metal cover layer is provided with 16 first rectangular openings, which are arranged in an array of 4 rows and 4 columns, and serve as branch ports of a 16-way power division network.

3. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 2 is characterized in that: Eight first rectangular waveguide cavities are processed on the sixteen-channel RF power layer, and the eight first rectangular waveguide cavities are symmetrically arranged on the upper and lower sides of the sixteen-channel RF power layer. The four first rectangular waveguide cavities on each side are adjacently arranged at equal distances, and the exteriors of the eight first rectangular waveguide cavities are all hollowed out to form a first weight-reducing cavity.

4. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 3 is characterized in that: The first metal cover layer is provided with 16 first rectangular openings, which are aligned vertically with output ports at both ends of eight first rectangular waveguide cavities processed on the sixteen-channel RF power layer.

5. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 1, characterized in that: The third rectangular opening opened on the second metal cover plate layer is vertically aligned with the middle input port of the first rectangular waveguide cavity processed on the sixteen-channel radio frequency power layer.

6. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 1, characterized in that: The eight-way RF power layer is processed with two I-shaped waveguide cavities, one second rectangular waveguide cavity, two convex-shaped weight-reducing cavities, two rectangular weight-reducing cavities and four cut-off mode waveguides; the two I-shaped waveguide cavities are symmetrically arranged on the left and right sides of the eight-way RF power layer, the second rectangular waveguide cavity is arranged in the middle of the eight-way RF power layer, and the two I-shaped waveguide cavities are connected by the second rectangular waveguide cavity to form a double I-shaped waveguide cavity; the outside of the double I-shaped waveguide cavity is completely hollowed out to form two convex-shaped weight-reducing cavities symmetrical up and down. and a rectangular weight-reducing cavity that is symmetrical on both sides; the rectangular weight-reducing cavity on the left side of the eight-way RF power layer is connected to the I-shaped waveguide cavity on the left side by a cutoff mode waveguide, the rectangular weight-reducing cavity on the right side of the eight-way RF power layer is connected to the I-shaped waveguide cavity on the right by a cutoff mode waveguide, the convex-shaped weight-reducing cavity above the eight-way RF power layer is connected to the second rectangular waveguide cavity in the middle by a cutoff mode waveguide, and the convex-shaped weight-reducing cavity below the eight-way RF power layer is connected to the second rectangular waveguide cavity in the middle by a cutoff mode waveguide.

7. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 6 is characterized in that: The two second rectangular openings opened on the second metal cover layer connect the first weight-reducing cavity on the sixteen-way radio frequency power layer with the two convex-shaped weight-reducing cavities on the eight-way radio frequency power layer.

8. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 6, characterized in that: The third rectangular opening formed on the second metal cover layer is vertically aligned with the output ports of the two I-shaped waveguide cavities.

9. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 6, characterized in that: A fourth rectangular opening is provided at the center of the third metal cover layer. The fourth rectangular opening serves as the main port of the power division network. The center of the fourth rectangular opening is vertically aligned with the central input port of the second rectangular waveguide cavity.

10. The radio frequency power division network based on waveguide cutoff mode electromagnetic weight reduction technology according to claim 1, characterized in that: The opening width of the rectangular waveguide is smaller than the cavity width of the double I-shaped waveguide cavity.

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