CN218677533U - Waveguide coaxial converter - Google Patents
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- CN218677533U CN218677533U CN202222715229.6U CN202222715229U CN218677533U CN 218677533 U CN218677533 U CN 218677533U CN 202222715229 U CN202222715229 U CN 202222715229U CN 218677533 U CN218677533 U CN 218677533U
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Abstract
The utility model provides a coaxial converter of waveguide, include: waveguide cavity and connecting rod, be equipped with the stair structure in the waveguide cavity, the connecting rod is including the body of rod and the probe that are connected, the probe with the stair structure sets up relatively, its characterized in that, the side profile of every grade of ladder of stair structure is arc or polygon, and polygonal limit number more than or equal to 6. The applicant finds that when the side profile of every grade of ladder of stair structure is arc or polygon, the probe is the same or basically the same with the profile of stair structure, for rectangle ladder mechanism, the utility model discloses can realize better matching, the debugging is easier, reaches the result of higher requirement more easily during the emulation design, and is more convenient during the product that the design degree of difficulty is high. Especially, when the probe and the stepped structure are circular and concentric, the coupling is more concentrated, and the transmission efficiency is higher.
Description
Technical Field
The utility model belongs to the technical field of signal transmission, especially, relate to a coaxial converter of waveguide.
Background
In signal transmission in the field of radio frequency microwave, besides the transmission of wireless signals, transmission lines are not required, and most scenes still need to conduct signals by using the transmission lines, wherein coaxial lines and waveguides are widely used for transmitting microwave radio frequency energy. In order to be used in various applications, the two transmission lines are sometimes interconnected, which requires a coaxial waveguide switch that converts a signal entering a waveguide port to a coaxial port for detection, or converts a signal entering a coaxial port to a waveguide port for detection.
The coaxial waveguide converter is an indispensable passive conversion device in various radar systems, precision guidance systems and test equipment, and has the characteristics of wide frequency band, low insertion loss, small standing wave and the like. The bandwidth of the coaxial line and the waveguide is relatively wide during transmission, and the bandwidth after connection depends on the converter, namely the matching of the characteristic impedance of the coaxial waveguide.
As shown in fig. 1-2, a rectangular step 4 is arranged in a waveguide cavity 1 of a conventional waveguide coaxial converter, the step is easy to process in this form, and the simulation can also meet the general requirements, but as shown in fig. 3, curves of points 2 and 3 in the drawing indicate the insertion loss of the waveguide converter, the insertion loss is less as the insertion loss is closer to 0, the matching is better, the insertion loss of the waveguide coaxial converter with the rectangular step is higher when the operating frequency is 5.5-6GHz, the curves of points 1, 4 and 5 indicate the standing wave ratio curve of the waveguide converter, the standing wave ratio of the waveguide coaxial converter with the rectangular step is larger, the form matching indicating the rectangular step is not sufficient, the coupling between the main rod face and the step is dispersed, and the debugging is not easy, and the realization of a product with high requirements is difficult.
SUMMERY OF THE UTILITY MODEL
A technical object of the utility model is to provide a coaxial converter of waveguide, it is abundant to aim at making the converter match, and the mobile jib concentrates with the concentric coupling of step, and the high requirement emulation requirement is satisfied in convenient debugging.
In order to solve the above technical problem, the present invention provides a waveguide coaxial converter, including: waveguide cavity and connecting rod, be equipped with the stair structure in the waveguide cavity, the connecting rod is including the body of rod and the probe that are connected, the probe with the stair structure sets up relatively, its characterized in that, the side profile of every grade of ladder of stair structure is arc or polygon, and polygonal limit number more than or equal to 6.
The polygon is most preferably a regular polygon.
Further, the probe is cylindrical, and the profile of each step of the stepped structure is cylindrical or semi-cylindrical.
Further, the probe is disposed coaxially with the highest step of the stepped structure.
Further, in order to make the matching more sufficient, all steps of the stepped structure are coaxially arranged.
Further, the ladder structure comprises a first ladder, a second ladder and a third ladder which are sequentially arranged from bottom to top and have gradually reduced diameters.
Further, the side profile of the first step is formed by combining an arc-shaped surface and a straight surface, the central angle corresponding to the arc-shaped surface is 220-280 degrees, and the straight surface is a step waveguide short-circuit surface. The semi-cylindrical structure can ensure that one side of the step structure forms a step waveguide short circuit surface and the outline of each step of the step structure is a circular curved surface. The second step and the third step are both cylindrical.
Further, the first step arc face corresponds to an angle of 254 °.
Further, the diameter of the first step is smaller than the diameter of the probe, and the diameter of the second step is larger than the diameter of the probe.
Further, the height of the first step is greater than the height of the second step.
Further, the height of the second step is less than the height of the third step, and the height of the first step is less than the height of the third step.
Compared with the prior art, the utility model, the beneficial effects lie in:
the applicant finds that when the side profile of each step of the stepped structure is an arc shape or a polygon with the number of sides more than or equal to 6, the probe and the profile of the stepped structure are the same or basically the same, better matching can be realized, debugging is easier, a result with higher requirements can be achieved more easily during simulation design, and the design of a product with high difficulty is more convenient.
Especially, when the probe and the stepped structure are circular and concentric, the coupling is more concentrated, and the transmission efficiency is higher.
Drawings
FIG. 1 is a schematic diagram of a prior art waveguide coaxial converter;
FIG. 2 is a cross-sectional view of a prior art waveguide coaxial converter;
FIG. 3 is a graph of a simulation of a prior art waveguide coaxial converter;
fig. 4 is a schematic diagram of the overall structure of the waveguide coaxial converter according to embodiment 1 of the present invention;
fig. 5 is a cross-sectional view of a waveguide coaxial converter according to embodiment 1 of the present invention;
fig. 6 is a simulation graph of the waveguide coaxial converter according to embodiment 1 of the present invention;
fig. 7 is a schematic diagram of the overall structure of a waveguide coaxial converter according to embodiment 2 of the present invention;
fig. 8 is a schematic diagram of the overall structure of a waveguide coaxial converter according to embodiment 3 of the present invention;
in the drawings, each reference numeral denotes:
1. the waveguide cavity comprises a waveguide cavity 2, a connecting rod 3, a stepped structure 4 and a rectangular stepped step;
101. the probe comprises a waveguide port 102, a coaxial port 201, a rod body 202, a probe 301, a first step 302, a second step 303, a third step 304 and a step waveguide short-circuit surface.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", and the like, indicate orientations and positional relationships based on the orientation and positional relationships shown in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be considered as limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is essential. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example 1:
referring to fig. 4-5, in the present embodiment, a waveguide coaxial converter includes: waveguide cavity 1 and connecting rod 2 are equipped with stair structure 3 in the waveguide cavity 1, and waveguide cavity 1's one end is waveguide port 101, and the other end is stair waveguide short-circuit face 304, and connecting rod 2 includes the body of rod 201 and probe 202, and probe 202 sets up in waveguide cavity 1, and probe 202 is connected to connecting rod 2's lower extreme, and coaxial port 102 is connected to the upper end, and probe 202 sets up with stair structure 3 is relative, and the side profile of 3 every grades of ladder of stair structure is the arc.
The waveguide cavity 1 is generally formed by an upper housing and a lower housing, which are butted, in this embodiment, the upper housing and the lower housing are not shown, an upper cavity is disposed at the lower side of the upper housing, a lower cavity is disposed at the upper side of the lower housing, the upper cavity and the lower cavity jointly form the waveguide cavity 1, and the stepped structure 3 is disposed on the upper side of the lower housing. It should be noted that the waveguide cavity 1 is formed by combining the upper and lower cases mainly for the convenience of processing, but this is not the only way to form the waveguide cavity 1.
In this embodiment, body of rod 201 and probe 202 are cylindrical, and probe 202 diameter is greater than the diameter of body of rod 201, and stair structure 3 includes first step 301, second step 302 and the third step 303 that sets gradually by lower supreme, thereby the diameter of first step 301, second step 302 and third step 303 reduces gradually and forms the ladder, and probe 202 sets up the top at third step 303. In order to fit the cylindrical probe 202, the second step 302 and the third step 303 are all complete cylindrical structures, while the first step 301 is not a complete cylinder, and the first step 301 is a semi-cylindrical structure because the end face thereof needs to form a step waveguide short-circuit surface 304.
In this embodiment, the side profile of the first step 301 is formed by combining an arc surface and a straight surface, the corresponding central angle of the arc surface is 220-280 °, and the straight surface of the first step 301 is the short-circuit surface 304 of the step waveguide. Preferably, the arc-shaped surface of the first step 301 corresponds to an angle of 254 ° in this embodiment.
In further simulations it was found that the height and diameter size of the first step 301, the second step 302 and the third step 303 need further optimization for better matching and higher transmission efficiency. In the present embodiment, the diameter of the first step 301 is smaller than the diameter of the probe 202, the diameter of the second step 302 is larger than the diameter of the probe 202, and the height of the first step 301 is larger than the height of the second step 302. The height of the second step 302 is less than the height of the third step 303 and the height of the first step 301 is less than the height of the third step 303.
The height and diameter dimensions of the first step 301, the second step 302 and the third step 303 are adjusted according to specific requirements, and the data are obtained through simulation.
The applicant finds that when the probe 202 and the step structure 3 have the same or substantially the same profile, better matching can be achieved, debugging is easier, a result with higher requirements can be achieved more easily during simulation design, and design of a product with high difficulty is more convenient.
Referring to fig. 6, the simulation of the waveguide coaxial converter in the present embodiment is data obtained by performing the simulation under the same conditions as those of the waveguide coaxial converter of the rectangular step structure shown in fig. 1-2. The insertion loss curves of the waveguide converters where the point 1 and the point 2 of the waveguide coaxial converter with the new structure are located show that the insertion loss is very close to 0, which shows that the waveguide coaxial converter of the embodiment has less loss and better matching.
Standing-wave ratio curves of the points 3, 4 and 5 show that the standing-wave ratio of the waveguide coaxial converter of the embodiment is smaller, the standing-wave ratio is more sufficient in indication matching, the main rod face and the step coupling are concentrated, debugging is easier, and transmission efficiency is higher. The waveguide coaxial converter with the probe 202 coaxial stepped structure 3 used in the method can achieve a result with higher requirements more easily during simulation design, and is more convenient for designing products with high difficulty.
The circular step structure 3 according to the present invention is not complicated to process compared to the conventional rectangular step structure 3, but provides a more sufficient matching effect and higher transmission efficiency.
Example 2:
referring to fig. 7, in this embodiment, the stepped structure 3 of the waveguide coaxial converter also includes a first step 301, a second step 302, and a third step 303 sequentially arranged from bottom to top, the probe 202 of the connecting rod 2 is a cylindrical structure, the first step 301, the second step 302, and the third step 303 are also coaxially arranged with the probe 202, but the first step 301, the second step 302, and the third step 303 are not complete cylindrical structures but sectors with the same central angle, one side of the first step 301, the second step 302, and the third step 303 is a coplanar straight surface, which is a stepped waveguide short-circuit surface 304.
Although the second step 302 and the third step 303 are also designed as fan-shaped steps in the waveguide coaxial converter of the present embodiment, compared with the converter with the existing rectangular step structure, the waveguide coaxial converter also has the advantages of more sufficient matching, more concentrated coupling and higher transmission efficiency.
It should be noted that although the first step 301, the second step 302 and the third step 303 are coaxial segments, they may be designed to be non-coaxial with the probe 202 and also match more adequately than the rectangular step structure through simulation, and of course they may match slightly worse than if the probe 202 were arranged coaxially with the step structure 3.
Example 3
Referring to fig. 8, in the present embodiment, the probe 202 of the connecting rod 2 of the waveguide coaxial converter is a hexagonal structure, the step structure 3 also includes a first step 301, a second step 302, and a third step 303 sequentially arranged from bottom to top, and the first step 301, the second step 302, and the third step 303 are regular hexagonal structures identical to the probe 202. By utilizing the probe 202 and the stepped structure 3 to have the same profile, the advantages of more sufficient matching, more concentrated coupling and higher transmission efficiency can be achieved, and the matching is slightly worse compared with the coaxial structure arrangement of the probe 202 and the stepped structure 3.
In other embodiments, the probe 202 is cylindrical, and the first step 301, the second step 302 and the third step 303 can be arranged as equilateral polygons, although the larger the number of sides of an equilateral polygon, the more sufficient the matching will be.
In other embodiments, the step structure 3 may further include more steps, the number of layers of the step structure 3 is not as large as possible, and the number of layers of a specific step is also determined according to simulation results.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a coaxial converter of waveguide, includes waveguide cavity and connecting rod, be equipped with the stair structure in the waveguide cavity, the connecting rod is including the body of rod and the probe that are connected, the probe with the stair structure sets up relatively, its characterized in that, the side profile of every grade of ladder of stair structure is arc or polygon, and polygonal limit number more than or equal to 6.
2. The waveguide coaxial converter of claim 1, wherein the probe is cylindrical and the profile of each step of the stepped structure is cylindrical or semi-cylindrical.
3. The waveguide coaxial converter of claim 1 or 2, wherein the probe is disposed coaxially with the highest step of the stepped structure.
4. The waveguide coaxial converter of claim 3, wherein all steps of the stepped structure are coaxially arranged.
5. The waveguide coaxial converter according to claim 1 or 2, wherein the stepped structure comprises a first step, a second step and a third step which are arranged from bottom to top and have gradually decreasing diameters.
6. A waveguide coaxial converter according to claim 5, wherein the first step has a side profile formed by combining an arc-shaped surface and a straight surface, the arc-shaped surface has a corresponding central angle of 220-280 °, and the straight surface is a step waveguide short-circuit surface.
7. The waveguide coaxial converter of claim 6, wherein the first stepped arcuate surface corresponds to a central angle of 254 °.
8. The waveguide coaxial converter of claim 5, wherein the diameter of the first step is smaller than the diameter of the probe and the diameter of the second step is larger than the diameter of the probe.
9. The waveguide coaxial converter of claim 5, wherein a height of the first step is greater than a height of the second step.
10. The waveguide coaxial converter of claim 9, wherein the height of the second step is less than the height of the third step, and the height of the first step is less than the height of the third step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222715229.6U CN218677533U (en) | 2022-10-11 | 2022-10-11 | Waveguide coaxial converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222715229.6U CN218677533U (en) | 2022-10-11 | 2022-10-11 | Waveguide coaxial converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218677533U true CN218677533U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222715229.6U Active CN218677533U (en) | 2022-10-11 | 2022-10-11 | Waveguide coaxial converter |
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| CN (1) | CN218677533U (en) |
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- 2022-10-11 CN CN202222715229.6U patent/CN218677533U/en active Active
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