A new structure of waveguide coaxial converter

Abstract

The present invention provides a waveguide coaxial converter with a new structural form, including a waveguide, a quarter impedance transformer, a cover plate and a coaxial connector. A matching cover plate is arranged above the waveguide, the cover plate is welded to the waveguide, the quarter impedance transformer is arranged inside the waveguide, the quarter impedance transformer forms multiple steps from the outside of the waveguide to the inside, the steps have equal widths, the coaxial connector is installed on the cover plate, the coaxial connector is located above the highest step, the coaxial connector is perpendicular to the waveguide, the waveguide is provided with a matching column, the matching column is located directly below the coaxial connector, one end of the matching column is welded to the waveguide through the highest step, and the other end extends into the cover plate. The present invention solves the problems of high processing difficulty, difficulty in ensuring accuracy, and large workload for subsequent debugging and assembly.

Description

Technical Field

[0001] The invention relates to the field of waveguides and waveguide-coaxial converters, and more specifically to a waveguide-coaxial converter with a new structural form. Background Art

[0002] Waveguides are widely used in the field of microwave communications. According to their cross-sectional shapes, they can be divided into rectangular waveguides, circular waveguides, double-ridge waveguides, and elliptical waveguides. Waveguides are often used in long-distance microwave transmission equipment because of their good electromagnetic shielding and low loss.

[0003] Existing waveguide coaxial converters all use a ridge-type quarter impedance transformer or a suspended probe form to design waveguide coaxial conversion. These two forms of waveguide coaxial conversion are difficult to process, and the accuracy is difficult to guarantee. At the same time, the subsequent debugging and assembly workload is large. Especially at high or very high frequencies, various indicators are more difficult to guarantee. Suspension form: To obtain high-performance products, the assembly requirements are high and difficult to operate, especially in the high frequency band. Ridge transformation form: The processing time is long, and the waveguide processing is difficult in the high frequency band such as BJ320 and above. Summary of the invention

[0004] The present invention provides a waveguide coaxial converter with a new structural form to solve the problems of relatively high processing difficulty, difficulty in ensuring precision and large workload of subsequent debugging and assembly.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a waveguide coaxial converter with a new structural form, comprising a waveguide, a quarter impedance transformer, a cover plate and a coaxial connector, wherein a matching cover plate is arranged above the waveguide, and the cover plate is welded to the waveguide, wherein the quarter impedance transformer is arranged inside the waveguide, and the quarter impedance transformer forms a plurality of steps from the outside of the waveguide to the inside, and the step widths are equal, wherein the coaxial connector is mounted on the cover plate, wherein the coaxial connector is located above the highest step, and the coaxial connector is perpendicular to the waveguide, wherein the waveguide is provided with a matching column, wherein the matching column is located directly below the coaxial connector, wherein one end of the matching column is welded to the waveguide through the highest step, and the other end extends into the cover plate, wherein a welding hole is arranged at the bottom of the waveguide, wherein the welding hole is located directly below the coaxial connector, wherein the welding hole is used to fill solder and facilitate welding of the waveguide and the matching column, and wherein the matching column is located directly above the welding hole.

[0006] Furthermore, the quarter impedance transformer is integrally milled inside the waveguide by CNC processing.

[0007] Furthermore, the cover plate and the coaxial joint are welded by soldering.

[0008] Furthermore, the matching column and the waveguide are welded by soldering.

[0009] Furthermore, the cover plate and the waveguide are welded by soldering.

[0010] Furthermore, a flange is provided on the outer side of the waveguide away from the highest step.

[0011] Furthermore, a fixing hole is provided on a side of the waveguide away from the flange, and a matching fixing screw is installed in the fixing hole, and the fixing screw is used to fix the waveguide to the matching column.

[0012] Furthermore, the flatness of the flange is 0.02, and the smoothness of the flange is 1.6.

[0013] Furthermore, the waveguide coaxial converter is subjected to a surface treatment of pickling and passivation.

[0014] Furthermore, the design form of the quarter impedance transformer is a full waveguide wideside design form.

[0015] Among them, the design of the quarter impedance transformer with full waveguide width ensures processing accuracy, shortens processing time, and is more convenient for assembly and debugging. It has better performance and lower processing and assembly difficulty. It is suitable for all types of waveguide conversion, such as BJ3 to BJ2600.

[0016] Furthermore, a welding port is provided on a side of the cover plate away from the flange, and the cover plate is welded to the matching column. The welding port is used to fill solder and facilitate welding of the cover plate and the matching column.

[0017] Furthermore, the cover plate and the matching column are welded by soldering.

[0018] Furthermore, the matching column is provided with a hollow hole opening upward, and the center of the hollow hole surface and the center of the bottom surface of the coaxial joint are in the same vertical direction.

[0019] Furthermore, the depth of the cavity is at least two-thirds of the height of the matching column, and the cavity is used to connect to the coaxial line to be connected.

[0020] Furthermore, the step width is an odd multiple of a quarter wavelength.

[0021] Compared with the prior art, the present invention has the following beneficial effects: the waveguide-coaxial converter with a new structural form of the present invention is designed to apply the quarter impedance change principle, transform and compress the entire waveguide a side, and the design form of full waveguide a side transformation, so that the quarter impedance converter and the waveguide are made into an integral form; a solder filling hole is added to the waveguide; the waveguide-coaxial converter with a full waveguide bandwidth is easy to process, the processing accuracy is easy to ensure, the structure is reliable, and the index performance is excellent, which not only reduces the processing difficulty, but also improves the processing accuracy, and not only ensures the technical indicators, but also reduces the debugging workload; all components of the waveguide-coaxial converter with a new structural form are integrated into an integral form through various methods, so that the overall structure is very stable and reliable, and the waveguide-coaxial conversion performance is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the waveguide coaxial converter of the new structural form of the present invention.

[0023] Figure 2 The figure is a schematic diagram of the flange end face of the waveguide coaxial converter of the new structural form of the present invention.

[0024] Figure 3 It is a schematic top view of the waveguide coaxial converter of the new structural form of the present invention.

[0025] Figure numerals: 1 is a waveguide, 2 is a quarter impedance transformer, 3 is a coaxial connector, 4 is a matching column, 5 is a cover plate, 6 is a welding hole, 7 is a fixing hole, 8 is a fixing screw, and 9 is a flange. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, if a first feature exists above or below a second feature, it may include that the first and second features are in direct contact, or it may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is above, above and above the second feature, including that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. If the first feature exists below, below and below the second feature, it includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0032] See also Figures 1 to 3 , what is shown in the figure is the embodiment structure selected by the present invention, which is for illustration only and is not limited to this structure in the patent application.

[0033] Embodiment 1

[0034] like Figure 1 , Figure 2 and Figure 3As shown, a waveguide 1 coaxial converter of a new structure comprises a waveguide 1, a quarter impedance transformer 2, a cover plate 5 and a coaxial connector 3. A matching cover plate 5 is arranged above the waveguide 1, and the cover plate 5 is welded to the waveguide 1. The quarter impedance transformer 2 is arranged inside the waveguide 1, and the quarter impedance transformer 2 forms a plurality of steps from the outside of the waveguide 1 to the inside, and the width of the steps is equal. The coaxial connector 3 is installed on the cover plate 5, and the coaxial connector 3 is located at the highest step of the step. Above, the coaxial connector 3 is perpendicular to the waveguide 1, the waveguide 1 is provided with a matching column 4, the matching column 4 is located directly below the coaxial connector 3, one end of the matching column 4 is welded to the step penetrating the highest section and the waveguide 1, and the other end extends into the cover plate 5, a welding hole 6 is provided at the bottom of the waveguide 1, the welding hole 6 is located directly below the coaxial connector 3, the welding hole 6 is used to fill the solder and facilitate the welding of the waveguide 1 and the matching column 4, and the matching column 4 is located directly above the welding hole 6.

[0035] In this embodiment, the quarter impedance transformer 2 is integrally milled inside the waveguide 1 by CNC processing.

[0036] The preferred welding method is as follows:

[0037] The welding method of the cover plate 5 and the coaxial joint 3 is soldering;

[0038] The matching column 4 and the waveguide 1 are welded by soldering.

[0039] The cover plate 5 and the waveguide 1 are welded by soldering.

[0040] In this solution, a flange 9 is provided on the outer side of the waveguide 1 away from the highest step.

[0041] In order to enhance the accuracy of the coaxial connection of the waveguide and further enhance the stability of the connection structure between the matching column 4 and the waveguide 1, a fixing hole 7 is provided on the side of the waveguide 1 away from the flange 9, and a matching fixing screw 8 is installed in the fixing hole 7, and the fixing screw 8 is used to fix the waveguide 1 to the matching column 4.

[0042] In a preferred embodiment, the waveguide coaxial converter is subjected to a surface treatment of pickling and passivation, the flatness of the flange 9 is 0.02, and the finish of the flange 9 is 1.6.

[0043] Embodiment 2

[0044] like Figure 1 , Figure 2 and Figure 3As shown, the second embodiment is basically similar to the first embodiment, and the difference is that the design form of the quarter impedance transformer 2 is a full waveguide wide side design form.

[0045] Among them, the design of the quarter impedance transformer 2 with full waveguide width ensures processing accuracy, shortens processing time, and is more convenient for assembly and debugging. It has better performance and lower processing and assembly difficulty. It is suitable for all types of waveguide conversion, such as BJ3 to BJ2600.

[0046] In order to further enhance the accuracy of the waveguide coaxial connection, a welding port is provided on the side of the cover plate 5 away from the flange 9, and the cover plate 5 is welded to the matching column 4. The welding port is used to fill solder and facilitate welding of the cover plate 5 and the matching column 4. The welding method of the cover plate 5 and the matching column 4 is soldering.

[0047] The design to further enhance the accuracy and stability of the waveguide coaxial connection is as follows:

[0048] The matching column 4 is provided with a hole opening upward, the center of the hole surface is in the same vertical direction as the center of the bottom surface of the coaxial connector 3; the depth of the hole is at least two-thirds of the height of the matching column 4, and the hole is used to connect to the coaxial line to be connected.

[0049] A more optimal design of the waveguide coaxial converter is that the step width is an odd multiple of a quarter wavelength.

[0050] The microwave signal is fed into the coaxial connector 3 through the quarter impedance transformer 2 in the waveguide 1. During this process, the quarter impedance transformer 2 distributes the reflection to the steps in each section, so that the reflection of the steps in each section is not large. The reflection of the load is offset by the reflection of the quarter impedance transformer 2 to achieve impedance matching, maximize the transmission power, and realize the transmission mode of mutual conversion between the waveguide 1 and the coaxial line.

[0051] The optimal parameter design of this scheme is as follows:

[0052] The axial dimension of the waveguide coaxial converter of the new structural form is L=30.00mm, and the dimension of the flange 9 is a×b=21.10mm×21.10mm, that is, the outer dimension of the waveguide coaxial converter of the new structural form is L×a×b=30.00mm×21.10mm×21.10mm; the height h of the matching column 4 is 6.03mm; the length of the center of the coaxial connector 3 from the side of the waveguide 1 close to the fixing screw 8 is c=5.50mm.

[0053] This new waveguide-to-coaxial converter adopts a special overall design to enhance the effect of waveguide-to-coaxial conversion, as follows:

[0054] After the quarter impedance transformer 2 is integrally milled inside the waveguide 1 by CNC processing, the quarter impedance transformer 2 and the waveguide 1 are integrated as a whole, thereby enhancing the stability of the conversion transmission structure;

[0055] The cover plate 5 and the coaxial connector 3 are welded to form a whole, thereby enhancing the stability of the connection structure between the cover plate 5 and the coaxial connector 3;

[0056] The cover plate 5 is welded to the matching column 4, and the matching column 4 is welded to the waveguide 1, and the three form a whole, thereby enhancing the accuracy and stability of the connection between the coaxial line and the waveguide 1;

[0057] The cover plate 5 and the waveguide 1 are welded to form a whole, thereby enhancing the overall structural stability of the waveguide coaxial converter of the new structural form.

[0058] In summary, the design of the waveguide-coaxial converter with a new structure applies the quarter impedance change principle, transforms and compresses the entire waveguide a side, and transforms the design form of the full waveguide a side, and makes the quarter impedance converter 2 and the waveguide 1 into an integral design form; the quarter impedance converter 2 is designed in the form of a full waveguide wide side; a welding hole 6 is set on the waveguide 1 to facilitate soldering; the overall design form of the waveguide-coaxial conversion of the quarter impedance converter 2 with a full waveguide wide side; that is, all components of the waveguide-coaxial converter with a new structure are integrated into a whole through various methods, so that the overall structure is very stable and reliable, and the performance of the waveguide-coaxial converter with a new structure is stable and reliable.

[0059] In practical applications, the size of the waveguide coaxial converter with the new structure can be slightly adjusted according to actual conditions to adapt to practical applications.

[0060] The above-described embodiments are used to illustrate the present invention, not to limit the present invention, so changes in the exemplified values ​​or replacement of equivalent elements should still fall within the scope of the present invention.

[0061] From the above detailed description, it can be understood by ordinary technicians in this field that the present invention can indeed achieve the above-mentioned purpose and has actually complied with the provisions of the Patent Law. Now a patent application is filed.

Claims

1. A waveguide coaxial converter with a new structure, characterized in that: The invention comprises a waveguide, a quarter impedance transformer, a cover plate and a coaxial connector. A matching cover plate is arranged above the waveguide, and the cover plate is welded to the waveguide. The quarter impedance transformer is arranged inside the waveguide, and the quarter impedance transformer forms a plurality of steps from the outside of the waveguide to the inside, and the step widths are equal. The coaxial connector is installed on the cover plate, and the coaxial connector is located above the highest step. The coaxial connector is perpendicular to the waveguide. The waveguide is provided with a matching column, and the matching column is located directly below the coaxial connector. One end of the matching column is welded to the waveguide through the highest step, and the other end extends into the cover plate. A welding hole is arranged at the bottom of the waveguide, and the welding hole is located directly below the coaxial connector. The welding hole is used to fill solder and facilitate welding of the waveguide and the matching column. The matching column is located directly above the welding hole. The design form of the quarter impedance transformer is a full waveguide wide side design form; the design of the quarter impedance transformer with full waveguide wide side ensures processing accuracy, shortens processing time, and makes assembly and debugging more convenient, and is suitable for all types of waveguide conversion; The waveguide is provided with a flange on the outer side away from the highest step; A welding port is provided on one side of the cover plate away from the flange, and the cover plate is welded to the matching column. The welding port is used to fill solder and facilitate welding of the cover plate and the matching column. The welding method of the cover plate and the matching column is soldering. The matching column is provided with a hole opening upward, the center of the hole surface is in the same vertical direction as the center of the bottom surface of the coaxial connector; the depth of the hole is at least two-thirds of the height of the matching column, and the hole is used to connect to the coaxial line to be connected.

2. A waveguide-to-coaxial converter of a new structure as claimed in claim 1, characterized in that: The quarter impedance transformer is integrally milled inside the waveguide by CNC processing.

3. A waveguide-to-coaxial converter of a new structure as claimed in claim 1, characterized in that: The cover plate and the coaxial joint are welded by soldering.

4. A waveguide-to-coaxial converter of a new structure as claimed in claim 1, characterized in that: The matching column and the waveguide are welded by soldering.

5. A waveguide-to-coaxial converter of a new structure as claimed in claim 1, characterized in that: The cover plate and the waveguide are welded by soldering.

6. A waveguide-to-coaxial converter of a new structure as claimed in claim 1, characterized in that: A fixing hole is arranged on a side of the waveguide away from the flange, and a matching fixing screw is installed in the fixing hole. The fixing screw is used to fix the waveguide to the matching column.

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