CN212587696U - A Microwave Resonant Cavity Coupling Ring Strong Coupling Device - Google Patents
A Microwave Resonant Cavity Coupling Ring Strong Coupling Device Download PDFInfo
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- CN212587696U CN212587696U CN202021669052.5U CN202021669052U CN212587696U CN 212587696 U CN212587696 U CN 212587696U CN 202021669052 U CN202021669052 U CN 202021669052U CN 212587696 U CN212587696 U CN 212587696U
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Abstract
本实用新型公开了一种微波谐振腔耦合环强耦合装置，该装置包含：微波谐振腔、T型柱状金属帽结构、同轴线耦合环结构、同轴线法兰盘和微调螺丝；其中，T型柱状金属帽结构和同轴线法兰盘均处于微波谐振腔的磁场最强处；微调螺丝螺纹连接在T型柱状金属帽结构上，且其所处位置与微波谐振腔连通；同轴线耦合环结构由同轴电缆和内导体环结构构成，同轴电缆插置在同轴线法兰盘和T型柱状金属帽结构上；内导体环结构为由与同轴电缆连接在一起的同轴线内导体弯曲并与微调螺丝的末端连接构成的环结构。本实用新型的装置不会因谐振腔壁上耦合孔尺寸过大而导致能量泄露，能够调节耦合环的大小以改善耦合环端口反射性能。
The utility model discloses a microwave resonant cavity coupling ring strong coupling device, which comprises: a microwave resonant cavity, a T-shaped columnar metal cap structure, a coaxial line coupling ring structure, a coaxial line flange and a fine-tuning screw; wherein, Both the T-shaped cylindrical metal cap structure and the coaxial flange are located at the strongest magnetic field of the microwave resonant cavity; the fine-tuning screw is threadedly connected to the T-shaped cylindrical metal cap structure, and its position is in communication with the microwave resonant cavity; The line coupling ring structure is composed of a coaxial cable and an inner conductor ring structure. The coaxial cable is inserted on the coaxial line flange and the T-shaped columnar metal cap structure; the inner conductor ring structure is composed of a coaxial cable connected together. The inner conductor of the coaxial wire is bent and connected with the end of the fine-tuning screw to form a ring structure. The device of the utility model will not cause energy leakage because the size of the coupling hole on the resonant cavity wall is too large, and the size of the coupling ring can be adjusted to improve the reflection performance of the port of the coupling ring.
Description
Technical Field
The utility model relates to a microwave cavity, concretely relates to microwave cavity coupling ring strong coupling device.
Background
The microwave resonant cavity is widely applied to microwave signal sources, microwave filters and wavemeters, and is a basic microwave element. Excitation and coupling of microwave resonators commonly use two types of classical sensors: the electric probe and the coupling ring can be manufactured by utilizing a coaxial cable. The electric probe is a structure formed by stripping a part of an outer conductor and a medium of the coaxial cable and exposing a section of length outside the inner conductor, the electric probe can be usually excited in a region with a stronger main mode electric field of the microwave resonant cavity, and when the electric probe is parallel to the main mode electric field, the main mode can be excited. The coupling ring is a structure formed by bending an inner conductor leaked outside the electric probe into a ring shape and then connecting the inner conductor with an outer conductor, the coupling ring is usually excited in a region with stronger magnetic field of the main mode of the microwave resonant cavity, and when the main mode magnetic field of the microwave resonant cavity passes through the coupling ring, the main mode can be excited.
In the low frequency band, the microwave resonant cavity has relatively large size and less high-order mode distribution, the electric probe and the coupling ring can be used as a mode for exciting the resonant cavity, and the exciting effect and the coupling effect are not greatly different. In the high frequency band, because the microwave cavity size is less, higher order mode distribution increases, and the microwave cavity of inciting somebody to action with the electrical probe can arouse higher order mode more easily this moment, consequently, uses the coupling ring to incite somebody to action the microwave cavity can be better in the high frequency band suppression higher order mode's production.
When the microwave cavity is used for the purpose of collecting and storing microwave energy to construct a microwave high-field environment, it is generally required that energy provided by an external signal source can be injected into the microwave cavity as efficiently as possible. At this time, if the coupling ring is selected to excite the microwave resonant cavity, it is required that the port reflection of the coupling ring is smaller and better, the reflection performance of the port of the coupling ring is better, and the efficiency of injecting the microwave energy into the microwave resonant cavity is higher. Generally, in order to make the port reflection of the coupling loop small enough, the diameter of the coupling loop needs to be increased to make the magnetic field of the main mode pass through the coupling loop more. Along with the increase of the size of the coupling ring, the size of the coupling hole on the wall of the microwave resonant cavity needs to be increased along with the increase of the size of the coupling ring so as to facilitate the smooth insertion of the coupling ring into the microwave resonant cavity, while the size of the high-frequency microwave resonant cavity is generally smaller, if the coupling hole on the wall of the microwave resonant cavity is too large, the energy leakage of the microwave resonant cavity can be caused, the performance such as the quality factor of the microwave resonant cavity is greatly reduced, and the purpose is against the purpose of constructing the microwave strong field. In addition, the size of the conventional coupling ring is fixed by welding once determined, if the size of the coupling ring is changed to adjust the port reflection, the coupling device needs to be taken out, the size of the coupling ring is adjusted again after the coupling ring is desoldered, and then the coupling ring is installed after welding, so that the adjustment of the reflection performance of the excitation port at the end of the microwave resonant cavity is very unfavorable, time-consuming and labor-consuming.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a strong coupling device of microwave cavity coupling ring has solved the problem that traditional coupling ring excitation microwave cavity device energy was revealed easily when the coupling hole is great, can set up the large size coupling hole, can not lead to the energy to reveal because of the oversize moreover, can also adjust the size of coupling ring, and the fine setting improves coupling ring port reflectance property.
In order to achieve the above object, the utility model provides a strong coupling device of microwave cavity coupling ring, the device contains: the microwave resonant cavity, the T-shaped columnar metal cap structure, the coaxial coupling ring structure, the coaxial flange plate and the fine tuning screw are arranged on the base; the T-shaped cylindrical metal cap structure and the coaxial flange are both positioned at the strongest position of the magnetic field of the microwave resonant cavity, the T-shaped cylindrical metal cap structure is fixed on the outer wall of the microwave resonant cavity, and the coaxial flange is fixed on the T-shaped cylindrical metal cap structure; the fine tuning screw is in threaded connection with the T-shaped columnar metal cap structure and is communicated with the inside of the microwave resonant cavity; the coaxial line coupling ring structure consists of a coaxial cable and an inner conductor ring structure, wherein the coaxial cable is inserted into the coaxial line flange plate and the T-shaped cylindrical metal cap structure and is fixed with the T-shaped cylindrical metal cap structure through the coaxial line flange plate; the inner conductor ring structure is a ring structure formed by bending a coaxial inner conductor connected with a coaxial cable and connecting the coaxial inner conductor with the bottom end of the fine adjustment screw, and the inner conductor ring structure is located at the strongest position of a magnetic field in the microwave resonant cavity.
Preferably, the coaxial cable includes: the coaxial cable comprises a coaxial cable outer conductor, a coaxial cable inner conductor and a coaxial cable inner dielectric layer; the coaxial line inner conductor and the coaxial line inner dielectric layer are positioned in the coaxial line outer conductor, the coaxial line inner conductor is positioned at the central axis of the coaxial line outer conductor, and the coaxial line inner dielectric layer is filled between the coaxial line inner conductor and the coaxial line outer conductor.
Preferably, the coaxial line inner conductor of the inner conductor ring structure is integrated with the coaxial line inner conductor of the coaxial cable, bent and connected at its end to the fine adjustment screw.
Preferably, the T-shaped cylindrical metal cap structure is further provided with a fine tuning threaded hole penetrating into the microwave resonant cavity, and the fine tuning screw is in threaded connection with the fine tuning threaded hole.
Preferably, a side wall of the microwave resonant cavity where the magnetic field is strongest is provided with: the microwave cavity wall coupling hole with the internal thread is formed, one surface, close to the inside of the microwave cavity, of the T-shaped columnar metal cap structure is provided with a cylinder matched with the microwave cavity wall coupling hole, and the cylinder is provided with an external thread matched with the internal thread of the microwave cavity wall coupling hole.
Preferably, a through round hole is formed in the cylinder, the coaxial cable is matched with the round hole, and the coaxial cable is inserted and fixed in the round hole through a coaxial flange plate.
Preferably, the coaxial cable and the bottom of the cylinder of the T-shaped cylindrical metal cap structure are both in the same plane with the inner wall of the microwave resonant cavity.
Preferably, the T-shaped columnar metal cap structure is further provided with a first T-shaped columnar metal cap structure fixing hole, a second T-shaped columnar metal cap structure fixing hole, a third T-shaped columnar metal cap structure fixing hole and a fourth T-shaped columnar metal cap structure fixing hole which are communicated with each other, the microwave resonant cavity is provided with a corresponding first mounting threaded hole, a corresponding second mounting threaded hole, a corresponding third mounting threaded hole and a corresponding fourth mounting threaded hole, and the T-shaped columnar metal cap structure and the microwave resonant cavity are fixed by matching screws with the fixing holes and the threaded holes.
The utility model discloses a microwave cavity coupling ring strong coupling device has solved the problem that traditional coupling ring excitation microwave cavity device energy was revealed easily when the coupling hole is great, has following advantage:
the device of the utility model, through the design of the T-shaped cylindrical metal cap structure, the T-shaped cylindrical metal cap structure is matched with the coupling hole of the microwave resonant cavity wall after the inner conductor ring structure is loaded into the microwave resonant cavity, so that the coupling hole is filled with metal, the influence of microwave energy radiation leakage caused by the overlarge coupling hole is eliminated, and the device can be applied to a large coupling ring; and moreover, the fine adjustment screw is arranged on the T-shaped columnar metal cap structure, the size of the coupling ring can be finely adjusted through the insertion depth change of the fine adjustment screw, the size of the coupling ring does not need to be adjusted through welding and desoldering, the adjusting capacity of the reflection performance of the port of the coupling ring is enhanced, and the fine adjustment screw has important significance on the reflection adjustment of the port of the coupling ring during strong coupling of the resonant cavity.
The utility model discloses a device can realize the strong coupling effect of microwave cavity coupling ring, provides effectual technical support for utilizing the resonant cavity to establish the microwave high field environment.
Drawings
Fig. 1 is a schematic structural diagram of the strong coupling device of the microwave resonant cavity coupling ring of the present invention.
Fig. 2 is a schematic structural view of the T-shaped cylindrical metal cap of the present invention.
Fig. 3 is a schematic diagram of a microwave resonant cavity according to the present invention.
Fig. 4 is an assembly diagram of the T-shaped cylindrical metal cap structure, the coaxial coupling ring structure, the coaxial flange and the fine adjustment screw according to the present invention.
Fig. 5 is a schematic diagram of the overall three-dimensional structure of the microwave resonant cavity coupling ring strong coupling device of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
A strong coupling device for a coupling ring of a microwave cavity, as shown in fig. 1, comprising: the microwave resonator comprises a microwave resonant cavity 1, a T-shaped columnar metal cap structure 2, a coaxial line coupling ring structure, a coaxial line flange 6 and a fine adjustment screw 8. The T-shaped cylindrical metal cap structure 2 and the coaxial flange 6 are located at the strongest magnetic field of the microwave resonant cavity 1, the T-shaped cylindrical metal cap structure 2 is fixed on the outer wall of the microwave resonant cavity 1, the coaxial flange 6 is fixed on the T-shaped cylindrical metal cap structure 2, the fine adjustment screw 8 is in threaded connection with the T-shaped cylindrical metal cap structure 2, the position of the fine adjustment screw is communicated with the inside of the microwave resonant cavity 1, and the T-shaped cylindrical metal cap structure 2 and the fine adjustment screw 8 are made of metal. Coaxial line coupling ring structure comprises coaxial cable and inner conductor ring structure 7, and coaxial cable passes through coaxial line ring flange 6 and is in the same place with the cylindrical metal cap structure of T type is fixed, and coaxial cable contains: the microwave resonant cavity comprises a coaxial line outer conductor 3, a coaxial line inner conductor 4 and a coaxial line inner dielectric layer 5, wherein the coaxial line inner conductor 4 and the coaxial line inner dielectric layer 5 are positioned in the coaxial line outer conductor 3, the coaxial line inner conductor 4 is positioned at the central axis of the coaxial line outer conductor 3, an inner conductor ring structure 7 is a ring structure formed by bending the coaxial line inner conductor 4 (formed by stripping the coaxial line outer conductor 3 and the coaxial line dielectric layer 5 by a coaxial cable) and connecting the coaxial line inner conductor 4 and the bottom end of a fine adjustment screw 8, and the inner conductor ring structure 7 is positioned at the strongest position of a magnetic field in the microwave resonant cavity 1. The inner conductor ring structure 7 is used for adjusting the reflection of the port of the coaxial line coupling ring structure, so that microwave energy is effectively injected into the microwave resonant cavity 1, the fine adjustment screw 8 is used for being connected with the inner conductor ring structure 7, the size of the inner conductor ring structure 7 can be finely adjusted through the insertion depth, and the adjusting capacity of the reflection performance of the port of the coupling ring can be adjusted.
The microwave resonant cavity 1 has the effects that electromagnetic energy injected into the microwave resonant cavity is converged and stored, and the side wall at the strongest position of the magnetic field is provided with: the microwave cavity wall coupling aperture 15. The microwave cavity wall coupling hole 15 is provided on the side wall of the microwave cavity 1 where the magnetic field is the strongest, and has an internal thread.
T type cylindricality metal cap structure 2 is in microwave cavity wall coupling hole 15 of microwave cavity 1 through threaded connection, T type cylindricality metal cap structure 2 is close to the inside one side of microwave cavity 1 and has the cylinder that has the external screw thread, this external screw thread and microwave cavity wall coupling hole 15's internal thread looks adaptation, T type cylindricality metal cap structure 2 and microwave cavity wall coupling hole 15 cooperation, T type cylindricality metal cap structure 2's cylindrical external diameter d2The outer diameter d of the outer end (the end far away from the inside of the microwave resonant cavity 1) of the T-shaped cylindrical metal cap structure 2 is consistent with the inner diameter of the microwave resonant cavity wall coupling hole 151Is larger than the outer diameter d of the inner end (the end close to the inside of the microwave resonant cavity 1, namely a cylinder)2So that the microwave cavity wall coupling hole 15 is filled with metal, and the microwave energy cannot leak through the microwave cavity wall coupling hole 15 and is kept in the microwave cavity as much as possible. The cylinder is provided with a through round hole 14, the coaxial cable is matched with the round hole 14, and the inner diameter d of the round hole 143The diameter of the coaxial cable is consistent, the coaxial cable is inserted and fixed in the round hole 14 through the coaxial flange 6, the bottoms of the coaxial cable and the cylinder of the T-shaped cylindrical metal cap structure 2 are in the same plane with the inner wall of the microwave resonant cavity 1, namely the height h of the cylinder is consistent with the depth of the microwave resonant cavity wall coupling hole 15, and therefore the T-shaped cylindrical metal cap structure does not interfere with the inside of the microwave resonant cavity. A through fine-tuning threaded hole is also arranged on the T-shaped columnar metal cap structure 213, a fine adjustment screw 8 is screwed in the fine adjustment threaded hole 13.
The use of the T-shaped columnar metal cap structure 2 can provide a larger optional range for the size selection of the coupling hole in the wall of the microwave resonant cavity, so that the inner conductor ring structure 7 can be conveniently inserted into the microwave resonant cavity 1, and meanwhile, metal filling is carried out on the coupling hole after the inner conductor ring structure 7 is inserted into the microwave resonant cavity, so that the microwave energy leakage caused by the overlarge coupling hole is blocked, and a channel is provided for the connection of a fine adjustment screw and a coaxial line inner conductor.
In addition, a first T-shaped cylindrical metal cap structure fixing hole 9, a second T-shaped cylindrical metal cap structure fixing hole 10, a third T-shaped cylindrical metal cap structure fixing hole 11 and a fourth T-shaped cylindrical metal cap structure fixing hole 12 are further formed in the T-shaped cylindrical metal cap structure 2, a first mounting threaded hole 16, a second mounting threaded hole 17, a third mounting threaded hole 18 and a fourth mounting threaded hole 19 are correspondingly formed in the microwave resonant cavity 1, and the T-shaped cylindrical metal cap structure 2 is fixed on the side wall of the microwave resonant cavity 1 where the magnetic field is strongest through screws.
The utility model discloses a strong coupling device's of microwave cavity coupling ring theory of operation specifically as follows:
the utility model discloses an introduce T type cylindricality metal cap structure, cooperate with classic coaxial coupling ring to load fine setting screw on T type cylindricality metal cap structure, constructed a strong coupling device of resonant cavity coupling ring, through the size of fine setting screw depth of insertion fine setting inner conductor ring structure 7, adjust the controllability of coupling ring port reflectance can, establish the strong field environment of microwave for realizing the strong coupling of microwave resonant cavity through the coupling ring structure and provide effective solution.
Moreover, the T-shaped cylindrical metal cap structure is introduced, so that the problem of energy leakage caused by overlarge size of a coupling hole due to the fact that the coupling ring is large in size when the coupling ring is used for realizing strong coupling of the microwave resonant cavity can be solved.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (8)
1. A strong coupling device for a coupling ring of a microwave resonant cavity, the device comprising: the microwave resonator comprises a microwave resonant cavity (1), a T-shaped columnar metal cap structure (2), a coaxial line coupling ring structure, a coaxial line flange plate (6) and a fine adjustment screw (8);
the T-shaped cylindrical metal cap structure (2) and the coaxial flange (6) are both positioned at the strongest position of the magnetic field of the microwave resonant cavity (1), the T-shaped cylindrical metal cap structure (2) is fixed on the outer wall of the microwave resonant cavity (1), and the coaxial flange (6) is fixed on the T-shaped cylindrical metal cap structure (2);
the fine adjustment screw (8) is in threaded connection with the T-shaped columnar metal cap structure (2) and is positioned to be communicated with the inside of the microwave resonant cavity (1);
the coaxial line coupling ring structure is composed of a coaxial cable and an inner conductor ring structure (7), wherein the coaxial cable is inserted into the coaxial line flange plate (6) and the T-shaped cylindrical metal cap structure (2) and is fixed with the T-shaped cylindrical metal cap structure through the coaxial line flange plate (6); the inner conductor ring structure (7) is a ring structure formed by bending a coaxial inner conductor connected with a coaxial cable and connecting the coaxial inner conductor with the bottom end of the fine adjustment screw (8), and the inner conductor ring structure (7) is positioned at the strongest position of a magnetic field in the microwave resonant cavity (1).
2. The microwave-cavity-coupling-ring strong-coupling device according to claim 1, wherein the coaxial cable comprises: the coaxial cable comprises a coaxial cable outer conductor (3), a coaxial cable inner conductor (4) and a coaxial cable inner dielectric layer (5); the coaxial cable comprises a coaxial cable inner conductor (4), a coaxial cable inner dielectric layer (5), a coaxial cable outer conductor (3), a coaxial cable inner conductor (4), a coaxial cable outer conductor (3), and a coaxial cable inner dielectric layer (5), wherein the coaxial cable inner conductor (4) and the coaxial cable inner dielectric layer (5) are located in the coaxial cable outer conductor (3), and the coaxial cable inner dielectric layer (5) is filled between the coaxial cable inner conductor (4) and the coaxial cable outer conductor (3).
3. The microwave cavity coupling ring strong coupling device according to claim 2, wherein the coaxial inner conductor of the inner conductor ring structure (7) is integrated with the coaxial inner conductor (4) of the coaxial cable, bent and connected at its end to the fine tuning screw (8).
4. The microwave resonant cavity coupling ring strong coupling device according to claim 1, wherein the T-shaped cylindrical metal cap structure (2) is further provided with a fine tuning threaded hole (13) penetrating into the microwave resonant cavity (1), and the fine tuning screw (8) is in threaded connection with the fine tuning threaded hole (13).
5. A microwave cavity coupling ring strong coupling device according to claim 4, characterized in that, the side wall of the microwave cavity (1) where the magnetic field is the strongest is provided with: the microwave cavity wall coupling hole (15) with the internal thread, the surface of the T-shaped cylindrical metal cap structure (2) close to the inside of the microwave cavity (1) is provided with a cylinder matched with the microwave cavity wall coupling hole (15), and the cylinder is provided with an external thread matched with the internal thread of the microwave cavity wall coupling hole (15).
6. The microwave cavity coupling ring strong coupling device according to claim 5, wherein the cylinder is provided with a through circular hole (14), the coaxial cable is adapted to the circular hole (14), and the coaxial cable is inserted and fixed in the circular hole (14) through the coaxial flange (6).
7. The microwave cavity coupling ring strong coupling device according to claim 5, wherein the bottom of the coaxial cable and the cylindrical bottom of the T-shaped cylindrical metal cap structure (2) are both in the same plane with the inner wall of the microwave cavity (1).
8. The microwave resonant cavity coupling ring strong coupling device according to claim 1, wherein a first T-shaped cylindrical metal cap structure fixing hole (9), a second T-shaped cylindrical metal cap structure fixing hole (10), a third T-shaped cylindrical metal cap structure fixing hole (11), and a fourth T-shaped cylindrical metal cap structure fixing hole (12) are further formed in the T-shaped cylindrical metal cap structure (2), a corresponding first mounting threaded hole (16), a corresponding second mounting threaded hole (17), a corresponding third mounting threaded hole (18), and a corresponding fourth mounting threaded hole (19) are formed in the microwave resonant cavity (1), and the T-shaped cylindrical metal cap structure (2) and the microwave resonant cavity (1) are fixed by matching screws with the fixing holes and the threaded holes.
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| CN202021669052.5U CN212587696U (en) | 2020-08-12 | 2020-08-12 | A Microwave Resonant Cavity Coupling Ring Strong Coupling Device |
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| CN202021669052.5U CN212587696U (en) | 2020-08-12 | 2020-08-12 | A Microwave Resonant Cavity Coupling Ring Strong Coupling Device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916878A (en) * | 2020-08-12 | 2020-11-10 | 电子科技大学 | A Microwave Resonant Cavity Coupling Ring Strong Coupling Device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916878A (en) * | 2020-08-12 | 2020-11-10 | 电子科技大学 | A Microwave Resonant Cavity Coupling Ring Strong Coupling Device |
| CN111916878B (en) * | 2020-08-12 | 2024-02-20 | 电子科技大学 | Strong coupling device for coupling ring of microwave resonant cavity |
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