CN217361863U - Waveguide resonant window - Google Patents
Waveguide resonant window Download PDFInfo
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- CN217361863U CN217361863U CN202221608683.5U CN202221608683U CN217361863U CN 217361863 U CN217361863 U CN 217361863U CN 202221608683 U CN202221608683 U CN 202221608683U CN 217361863 U CN217361863 U CN 217361863U
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Abstract
The present application relates to waveguide transmission technology. The application discloses waveguide resonant window comprises the window that the electrically conductive diaphragm of embedding waveguide encloses, electrically conductive diaphragm with the waveguide inner wall links to each other, electrically conductive diaphragm place plane with the waveguide axis is perpendicular, its characterized in that, be provided with the breach on the window. According to the technical scheme, the resonant window is of an open structure, machining precision is improved, and integrated machining and manufacturing are facilitated. The window size can be conveniently adjusted through the simple tuning bolt, so that the resonant frequency is changed, and the frequency is accurately tuned.
Description
Technical Field
The application relates to the technical field of electromagnetic wave transmission, in particular to a waveguide transmission technology, and particularly relates to a waveguide resonant window.
Background
A waveguide is a common microwave transmission line, and is generally composed of a hollow conductive tube (e.g., a metal tube). Rectangular waveguide with a rectangular cross section, circular waveguide with a circular cross section.
A rectangular waveguide structure is generally formed from a rectangular metal tube, as shown in fig. 1. a is the width of the rectangular waveguide cavity (called the broad side) and b is the height of the rectangular waveguide cavity (called the narrow side). The rectangular waveguide transmission characteristics are mainly determined by the dimensions of a and b, and have no relation with the wall thickness of the metal tube. The middle of the rectangular metal tube is generally an air medium, and electromagnetic waves are transmitted in the air.
The circular waveguide structure is generally composed of a circular metal tube, as shown in fig. 4. The inner diameter r of the metal tube is the inner diameter of the circular waveguide, and the size of the metal tube determines the transmission characteristics of the circular waveguide.
The waveguide 10 is mainly used as a transmission line for microwave signals for connecting microwave transmitters and receivers with their antennas in microwave ovens, radars, communication satellites and microwave radio link equipment.
A resonant window 11 is formed by inserting a conductive diaphragm (usually a metal diaphragm) into the waveguide 10, and functions to allow electromagnetic waves of a certain frequency (referred to as a resonant frequency) to pass through, while electromagnetic waves of other frequencies are reflected by the resonant window and cannot pass through. The frequency is determined by the structural parameters of the resonant window.
The resonant window 11 of the rectangular waveguide is formed by a rectangular window surrounded by conductive diaphragms, the plane of the conductive diaphragm is perpendicular to the central axis of the waveguide, i.e. the conductive diaphragm is perpendicular to the waveguide wall, the outer periphery of the conductive diaphragm is connected with the inner wall of the rectangular waveguide, and the width a1 of the resonant window and the height b1 of the resonant window are related to the resonant frequency of the resonant window 11, as shown in fig. 2 and 3. By adjusting the window size (i.e. changing the width d of the conductive diaphragm), the resonance frequency can be changed, the thickness of the conductive diaphragm having little effect on the resonance frequency. Usually the width of 4 sides of the rectangular window can be equal or unequal, but in order to maintain symmetry, it is generally required that the width of opposite sides of the rectangular window should be equal.
Referring to fig. 4 and 5, the resonant window 11 of the circular waveguide is also a circular window surrounded by a conductive diaphragm, the outer diameter r of the conductive diaphragm is equal to the inner diameter of the circular waveguide, and the inner diameter r1 of the conductive diaphragm is related to the resonant frequency of the resonant window.
For a rectangular resonant window, two lateral sides of the rectangular window may be equivalent to the capacitance C of the parallel resonant circuit, as shown in fig. 6; two vertical sides of the rectangular window can be equivalent to the inductance L of the parallel resonant circuit, as shown in FIG. 7; the entire resonant window 11 can be equivalent to a parallel resonant circuit of an inductor L and a capacitor C as shown in fig. 8. According to the basic theory of the circuit, when the parallel resonance circuit resonates, the impedance of the circuit becomes infinite. Electromagnetic waves equal to the resonance frequency can be transmitted through the waveguide and electromagnetic waves of other frequencies cannot pass through the waveguide.
There are two main problems with prior art resonant windows: firstly, the processing is inconvenient, the resonant window is embedded in the waveguide, and the resonant window and the waveguide are not easy to be integrally formed and processed; secondly, because processing has certain error, and the resonant window is a closed structure, the size of window is inconvenient to adjust, is unfavorable for debugging resonant frequency.
Disclosure of Invention
The main object of this application is to provide a waveguide resonant window to solve the waveguide resonant window debugging of prior art, the inconvenient problem of processing.
In order to achieve the above object, according to an aspect of the present invention, there is provided a waveguide resonant window, which is formed by a window surrounded by a conductive diaphragm embedded in a waveguide, the conductive diaphragm is connected to an inner wall of the waveguide, and a plane of the conductive diaphragm is perpendicular to a central axis of the waveguide, wherein a notch is formed on the window.
In some embodiments, a tuning pin is mounted in a middle position of the notch.
In certain embodiments, the conductive diaphragm is a unitary structure with the waveguide.
In certain embodiments, the waveguide is a rectangular waveguide.
In certain embodiments, the window is a rectangular window.
In some embodiments, the width of the gap is equal to the length of the rectangular window border.
In some embodiments, the notch is arranged on the upper frame and/or the lower frame of the rectangular window.
In some embodiments, the notch is arranged on the left frame and/or the right frame of the rectangular window.
In certain embodiments, the waveguide is a circular waveguide.
In certain embodiments, the window is a circular window.
According to the technical scheme of the application and the technical scheme of further improvement in certain exemplary embodiments, the application has the following beneficial effects: the resonant window adopts an opening structure, so that the processing precision is improved, and the integrated processing and manufacturing are facilitated; the size of the window can be conveniently adjusted through the simple tuning bolt, so that the resonance frequency is changed, and the frequency is accurately tuned.
The present application will be further described with reference to the following drawings and detailed description. Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a rectangular waveguide structure;
FIG. 2 is a schematic diagram of a rectangular waveguide and a resonant window;
FIG. 3 is a schematic view of a rectangular resonant window structure;
FIG. 4 is a schematic diagram of the arrangement of a circular waveguide and a resonant window;
FIG. 5 is a schematic view of a circular resonant window structure;
FIG. 6 is a schematic diagram of equivalent capacitance of a rectangular resonant window;
FIG. 7 is a schematic diagram of equivalent inductance of a rectangular resonant window;
FIG. 8 is a schematic diagram of an equivalent circuit of a rectangular resonant window;
FIG. 9 is a schematic view of the structure of the resonance window of embodiment 1;
FIG. 10 is a schematic view showing the arrangement of the resonant window and the tuning pin in accordance with embodiment 1;
FIG. 11 is a schematic view of the structure of the resonant window of embodiment 2;
FIG. 12 is a schematic view showing the structure of a resonance window in accordance with embodiment 3;
FIG. 13 is a schematic view of the structure of the resonant window of embodiment 4;
FIG. 14 is a schematic view showing the structure of a resonance window in accordance with example 5;
FIG. 15 is a schematic view showing the structure of a resonance window in accordance with embodiment 6;
FIG. 16 is a schematic view showing the structure of a resonance window in accordance with embodiment 7;
FIG. 17 is a schematic view showing the structure of a resonance window in accordance with embodiment 8;
FIG. 18 is a schematic view of the structure of the resonant window of embodiment 9.
Wherein:
1-a notch; 10-waveguide; 11-resonant window; 12-tuning pin; a-the width of the rectangular waveguide; b-narrow side of rectangular waveguide; d-conductive film width; c, the width of the gap of the circular resonant window; a 1-resonant window width; b 1-resonant window height; r-circular waveguide inner diameter; r 1-resonant window inner diameter; l is inductance; c-capacitance.
Detailed Description
It should be noted that the detailed description, the exemplary embodiments and the features therein may be combined with each other in the present application without conflict. The present application will now be described in detail with reference to the drawings, in conjunction with the following.
In order to make those skilled in the art better understand the technical solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments and the exemplary embodiments of the present application with reference to the drawings in the exemplary embodiments and the detailed description of the present application. All other embodiments and examples that can be obtained by a person skilled in the art without making any inventive step based on the specific embodiments and example examples in this application shall fall within the scope of protection of this application.
The waveguide resonant window is formed by a window surrounded by a conductive diaphragm embedded into a waveguide.
The periphery of the conductive diaphragm is connected with the inner wall of the waveguide to form an integral structure.
The plane of the conductive film is perpendicular to the central axis of the waveguide, so that the included angles between the conductive film and the waveguide wall are 90 degrees.
The technical scheme of this application sets up the breach on the resonance window. The existence of the gap enables the resonant window to be changed into an open structure from a closed structure, which not only facilitates the processing and the forming, but also is more beneficial to achieving the purpose of adjusting the resonant frequency by changing the size of the window, such as inserting a tuning bolt in the gap or changing the width of the conductive film.
Example 1
The resonant window 11 in this example is a resonant window for a rectangular waveguide. The resonant window 11 is formed by a rectangular window surrounded by a conductive diaphragm, the conductive diaphragm is connected with the inner wall of the rectangular waveguide, and the plane of the conductive diaphragm is perpendicular to the central axis of the waveguide, as shown in fig. 2.
In this example, a notch 1 is provided on the rectangular window surrounded by the conductive film, and the notch 1 is located on the upper frame of the rectangular window, and its width is equal to the width a1 of the resonant window, as shown in fig. 9. This is equivalent to that the rectangular window lacks one side, and the window shaped like the Chinese character 'hui' is changed into the window shaped like the Chinese character 'ao'. The resonant window with the structure is convenient to process, and is beneficial to improving the processing precision of the notch 1 and ensuring the accuracy of resonant frequency.
In this embodiment, since the resonant window is provided with the notch 1, the size of the window can be changed by inserting the tuning bolt 12 in the middle of the notch 1, so as to conveniently adjust the resonant frequency of the resonant window, as shown in fig. 10.
The tuning bolt 12 of this embodiment can be a metal screw, a matching threaded hole is processed at a corresponding position of the wide side of the rectangular metal tube, the tuning bolt 12 is screwed into the threaded hole, the purpose of adjusting the resonant frequency is achieved by screwing in or out the tuning bolt 12, the resonant frequency deviation caused by processing errors can be compensated, and the purpose of accurate tuning is achieved.
Example 2
In the structure of the resonant window 11 of this example, as shown in fig. 11, the notch 1 of the resonant window 11 is disposed on the lower frame of the rectangular window, and the width of the notch 1 is equal to the width a1 of the rectangular resonant window. Other structural features of the resonant window of this example can be seen from the description of example 1. The resonant window of this example may also employ tuning pins to adjust the resonant frequency.
Example 3
As shown in fig. 12, the notch 1 of the resonant window 11 of this embodiment is disposed on the left frame of the rectangular window, and the width of the notch is equal to the height b1 of the resonant window. Other structural features of the resonant window of this embodiment can be found in the description of the above embodiments, which is omitted here.
Example 4
The structure of the resonant window 11 of this example is the same as that described in embodiment 3, except that the notch 1 of the resonant window 11 of this example is provided on the right frame of the rectangular window, and the width of the notch is equal to the height b1 of the resonant window, as shown in fig. 13. For other structural features of the resonant window in this embodiment, reference may be made to the description of the above embodiments, and further description is omitted here.
The 4 resonant window structures described in the above embodiments all have a common feature, that is, the width of the notch is equal to the width a1 or the height b1 of the resonant window, which is equivalent to that the rectangular window lacks one side, and all have the features of convenient processing and high processing precision, and facilitate tuning the resonant frequency, and are very suitable for manufacturing the rectangular waveguide and the resonant window of the integrated structure.
Example 5
The structure of the resonant window 11 is further simplified in this example, and the notches 1 are arranged on the upper frame and the left frame of the rectangular window, as shown in fig. 14, which is equivalent to removing the upper frame and the left frame of the rectangular window. The notch structure of the embodiment is simpler, the processing is more convenient, the processing precision can be higher, and the resonant frequency debugging is also easy to realize. The resonant window structure of the present example is more suitable for manufacturing a rectangular waveguide and a resonant window in a unified structure. Other structural features of the resonant window of this embodiment can be seen from the description of the above embodiments.
Example 6
As shown in fig. 15, the notch 1 of the resonant window 11 of this embodiment is disposed on the lower frame and the right frame of the rectangular window, which is equivalent to removing the lower frame and the right frame of the rectangular window, and other structural features of this embodiment can be referred to in the description of embodiment 5.
Example 7
Referring to fig. 16, the notch 1 of the resonant window 11 of this embodiment is disposed on the upper frame and the right frame of the rectangular window, which is equivalent to removing the upper frame and the right frame of the rectangular window, and other structural features of this embodiment can be referred to the related description of embodiment 5.
Example 8
As shown in fig. 17, the notch 1 of the resonant window 11 of this embodiment is disposed on the lower frame and the left frame of the rectangular window, which is equivalent to removing the lower frame and the left frame of the rectangular window, and other structural features of this embodiment can be referred to in the related description of embodiment 5.
As can be seen from the above description of the embodiments, even three sides of the rectangular window may be removed and only one side may be used for the resonant window of the rectangular waveguide. The structure can further simplify the structure of the resonant window, and is more favorable for improving the integrated processing precision.
Example 9
The resonant window in this example is a resonant window used in a circular waveguide, and the resonant window 11 in this example is structured as shown in fig. 18, the resonant window 11 is formed by a circular window completed by a conductive diaphragm, and the resonant window in this example is also provided with a notch 1 having a width of c. Due to the symmetrical structure of the circular waveguide, the notch 1 can be arranged at any position of the circular window, and the resonant frequency can be controlled by controlling the width c of the notch. The resonant window of this example can also be tuned to the resonant frequency by inserting tuning pegs in the notches.
Claims (10)
1. A waveguide resonant window is formed by a window surrounded by a conductive diaphragm embedded in a waveguide, the conductive diaphragm is connected with the inner wall of the waveguide, and the plane of the conductive diaphragm is vertical to the central axis of the waveguide.
2. A waveguide resonator window according to claim 1, in which a tuning peg is mounted in the gap at a central location.
3. A waveguide resonator window according to claim 1, wherein the electrically conductive diaphragm is of unitary construction with the waveguide.
4. A waveguide resonator window according to claim 1, wherein the waveguide is a rectangular waveguide.
5. A waveguide resonator window according to claim 4, wherein the window is a rectangular window.
6. A waveguide resonator window according to claim 5, wherein the gap has a width equal to the length of the rectangular window frame.
7. A waveguide resonator window according to claim 6, wherein the aperture is provided in the upper and/or lower rims of the rectangular window.
8. A waveguide resonator window according to claim 6, wherein the notch is provided in the left and/or right rim of the rectangular window.
9. A waveguide resonator window according to claim 1, wherein the waveguide is a circular waveguide.
10. A waveguide resonator window according to claim 9, wherein the window is a circular window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221608683.5U CN217361863U (en) | 2022-06-24 | 2022-06-24 | Waveguide resonant window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221608683.5U CN217361863U (en) | 2022-06-24 | 2022-06-24 | Waveguide resonant window |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217361863U true CN217361863U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221608683.5U Active CN217361863U (en) | 2022-06-24 | 2022-06-24 | Waveguide resonant window |
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| Country | Link |
|---|---|
| CN (1) | CN217361863U (en) |
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- 2022-06-24 CN CN202221608683.5U patent/CN217361863U/en active Active
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Assignee: NANJING CHANGFENG AEROSPACE ELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd. Assignor: CHENGDU University OF INFORMATION TECHNOLOGY Contract record no.: X2023980051231 Denomination of utility model: A waveguide resonant window Granted publication date: 20220902 License type: Common License Record date: 20231213 |
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