A coaxial microwave choke structure

Abstract

This utility model relates to a coaxial microwave choke structure, including a core wire and a coaxial outer shell. The core wire passes through the coaxial outer shell, and a gap channel exists between the core wire and the coaxial outer shell. The core wire and the coaxial outer shell are coaxial. A hollow portion is provided inside the coaxial outer shell, and the hollow portion is connected to the gap channel through a connecting channel. This structure blocks microwave transmission and reflects microwaves, reducing microwave radiation. Furthermore, the choke structure has a large gap, effectively eliminating arcing.

Description

Technical Field

[0001] This utility model relates to the field of microwave equipment technology, and in particular to a coaxial microwave choke structure. Background Technology

[0002] In MPCVD equipment, the coaxial choke structure achieves efficient microwave transmission through impedance matching and electromagnetic field confinement. Its key role is to suppress microwave leakage and maintain stable microwave propagation. The microwave choke effectively blocks microwave transmission and reflects microwaves, ensuring that the equipment's microwave radiation meets national standards.

[0003] In traditional microwave coaxial transmission systems, microwave chokes employ planar bonding, metal ring sealing, or a combination of both. However, since the intermediate conductor is curved, achieving a perfect planar bonding is difficult. During high-power applications, excessive electric field strength at the bonding surface or metal ring gaps can cause arcing, damaging the microwave transmission system. Therefore, improvements are needed. Utility Model Content

[0004] Therefore, it is necessary to provide a coaxial microwave choke structure to address the above problems.

[0005] A coaxial microwave choke structure includes a core wire and a coaxial housing. The core wire passes through the coaxial housing, and there is a gap channel between the core wire and the coaxial housing. The core wire and the coaxial housing are coaxial. A hollow part is provided inside the coaxial housing, and the hollow part is connected to the gap channel through a connecting channel.

[0006] Preferably, the hollow portion, connecting channel, and gap channel are filled with insulating material.

[0007] Preferably, the insulating material is polytetrafluoroethylene, ceramic, or quartz glass.

[0008] Preferably, the cross-section of the hollow portion is annular.

[0009] Preferably, the connection channel extends radially along the coaxial housing.

[0010] Preferably, the connection channel is located near the microwave inlet end of the gap channel.

[0011] The advantages of this invention are: the structure blocks microwave transmission to the outside and reflects microwaves, reducing microwave radiation, and the choke groove structure has a large gap, which effectively eliminates arcing. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of a coaxial microwave choke structure according to one embodiment; Figure 2A top view schematic diagram of a coaxial microwave choke structure; Figure 3 This is a cross-sectional schematic diagram of another embodiment of a coaxial microwave choke structure; Figure 4 This is a cross-sectional schematic diagram of another embodiment of a coaxial microwave choke structure. Detailed Implementation

[0013] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] like Figures 1-4As shown, a coaxial microwave choke structure includes a core wire 1 and a coaxial outer shell 2. The core wire 1 penetrates the coaxial outer shell 2, and a gap channel 3 exists between the core wire 1 and the coaxial outer shell 2. The core wire 1 and the coaxial outer shell 2 are coaxial. A hollow portion 21 is provided inside the coaxial outer shell 2, and the hollow portion 21 is connected to the gap channel 3 through a connecting channel 22. Specifically, in this embodiment, the core wire 1 and the coaxial outer shell 2 are made of metal. Microwaves enter from the microwave inlet end of the gap channel 3. By keeping the core wire 1 and the coaxial outer shell 2 coaxial, the gap channel 3 is annular. A hollow portion 21 is provided inside the coaxial outer shell 2, and the hollow portion 21 is connected to the gap channel 3 through the connecting channel 22 to form a microwave choke. A reasonable design of its size can create a high-resistivity surface on the top surface of the choke. When microwave surface current flows through the choke, the current is blocked, thereby reducing microwave radiation. Furthermore, the choke structure has a large gap, effectively eliminating arcing.

[0017] Specifically, insulating material is filled in the hollow part 21, the connecting channel 22 and the gap channel 3 to further improve the anti-sparking ability.

[0018] Specifically, the insulating material is polytetrafluoroethylene, ceramic, or quartz glass.

[0019] Specifically, the hollow portion 21 has an annular cross-section, which increases its volume while maintaining symmetry, thus facilitating uniform field distribution. In other embodiments, it can also be designed as a polygonal rhombus. Specifically, the connection channel 22 extends along the radial direction of the coaxial housing 2.

[0020] Specifically, the microwave inlet of the gap channel 3 can be used as an input port at either end and as an output port at the other end.

[0021] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A coaxial microwave choke structure, characterized by: It includes a core wire and a coaxial housing, the core wire passing through the coaxial housing, a gap channel existing between the core wire and the coaxial housing, the core wire and the coaxial housing being coaxial, and a hollow part provided inside the coaxial housing, the hollow part being connected to the gap channel through a connecting channel.

2. A coaxial microwave choke structure as claimed in claim 1, characterized in that: The hollow section, connecting channel, and gap channel are filled with insulating material.

3. A coaxial microwave choke structure as claimed in claim 2, characterized in that: The insulating material is polytetrafluoroethylene, ceramic, or quartz glass.

4. The coaxial microwave choke structure as described in claim 1, characterized in that: The cross-section of the hollow part is annular.

5. A coaxial microwave choke structure as claimed in claim 1, wherein: The connection channel extends radially along the coaxial housing.

6. A coaxial microwave choke structure as claimed in claim 1, characterized in that: The connection channel is located near the microwave inlet end of the gap channel.

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