Ultrathin wrapping type radio frequency coaxial cable with high adhesive force

Abstract

The utility model discloses an ultra-thin wrapping type radio frequency coaxial cable with high adhesive force. The ultra-thin wrapping type radio frequency coaxial cable comprises an inner conductor, a first insulating layer and a second insulating layer, the inner conductor is located at the axis, the first insulating layer and the second insulating layer are sequentially and repeatedly wrapped on the surface of the inner conductor from inside to outside, and the wrapping directions of the first insulating layer and the second insulating layer are opposite; the outer diameters of the first insulating layers on the same layer are kept consistent, and the outer diameters of the second insulating layers on the same layer are kept consistent; the diameter of the wrapping type radio frequency coaxial cable does not exceed 2mm. According to the wrapping type radio frequency coaxial cable, a single-layer wrapping technology is adopted, the first insulating layer of the first layer is wrapped and then the second insulating layer of the first layer is wrapped, the wrapping force of the first insulating layer and the wrapping force of the second insulating layer are opposite, the insulating layer structure is stable after multi-layer wrapping, and the stability and the consistency of the cable are very good.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to an ultra-fine, high-adhesion wrapped radio frequency coaxial cable. Background Technology

[0002] High-performance, low-loss, phase-stable RF coaxial cable is widely used internationally in advanced weaponry, satellite communication equipment, radar navigation, and other applications, especially in systems such as phased array radar. These applications require high-performance RF coaxial cables to ensure the normal transmission of RF signals. High-performance RF coaxial cables are essential key components in aviation, aerospace, and next-generation weaponry.

[0003] Ordinary high-performance stable phase cables generally suffer from poor adhesion, especially ultra-fine cables, which have even worse insulation adhesion. This affects the insertion loss stability and mechanical phase stability of the cable. Furthermore, due to the inconsistency of each wrapping head, it is difficult to guarantee the consistency of the insulation outer diameter of a single wrapping. Utility Model Content

[0004] This invention provides an ultra-fine, high-adhesion wrapped radio frequency coaxial cable, the purpose of which is to solve the aforementioned problems existing in the background art.

[0005] The technical solution provided by this utility model is as follows:

[0006] An ultra-fine, high-adhesion wrapped radio frequency coaxial cable includes an inner conductor, a first insulating layer, and a second insulating layer.

[0007] The inner conductor is located at the axis, and the first insulating layer and the second insulating layer are repeatedly wrapped around the surface of the inner conductor from the inside to the outside, with the wrapping directions of the first insulating layer and the second insulating layer being opposite.

[0008] The outer diameter of the first insulating layer in the same layer is consistent, and the outer diameter of the second insulating layer in the same layer is consistent;

[0009] The diameter of the wrapped radio frequency coaxial cable does not exceed 2mm.

[0010] Furthermore, the first insulating layer has n layers, and the second insulating layer has n layers or n-1 layers, where n≥2.

[0011] Furthermore, the first insulating layer of the first layer is wrapped around the surface of the inner conductor along the first direction, the second insulating layer of the first layer is wrapped around the surface of the first insulating layer of the first layer along the second direction, the first insulating layer of the second layer is wrapped around the surface of the first insulating layer of the first layer along the first direction, and the second insulating layer of the second layer is wrapped around the surface of the second insulating layer of the second layer along the second direction. The first insulating layer and the second insulating layer are alternately and repeatedly arranged until the wrapping of the nth first insulating layer or the nth second insulating layer is completed.

[0012] Furthermore, the tail of the first insulating layer of the first layer is connected to the head of the second insulating layer of the first layer, the tail of the second insulating layer of the first layer is connected to the head of the first insulating layer of the second layer, and the tail of the first insulating layer of the second layer is connected to the head of the second insulating layer of the second layer, until the head of the first insulating layer of the nth layer is connected to the tail of the second insulating layer of the (n-1)th layer, or until the tail of the first insulating layer of the nth layer is connected to the head of the second insulating layer of the nth layer.

[0013] Furthermore, each of the first insulating layer and the second insulating layer is a single-layer insulating structure.

[0014] Furthermore, the adhesion of the wrapped radio frequency coaxial cable can reach 4N.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The wrapped radio frequency coaxial cable provided by this utility model adopts a single-layer wrapping process. After the first insulation layer is wrapped, the cable is turned around and then the first second insulation layer is wrapped. The wrapping forces of the first insulation layer and the second insulation layer are opposite. After multiple wrapping, the insulation layer structure is stable. After the wrapping is completed, the first insulation layer and the second insulation layer are heated and treated to increase the viscosity between the first insulation layer and the second insulation layer and the adhesion between the first insulation layer, the second insulation layer and the inner conductor. Therefore, the cable has very good stability.

[0017] 2. The wrapped radio frequency coaxial cable provided by this utility model has been preliminarily tested and verified. Its adhesion is about 3N greater than that of conventional wrapped cables. In the conventional way, ultra-fine wrapped cables have almost no adhesion, but after changing the wrapping method, the adhesion can reach about 4N, which greatly improves the performance stability of ultra-fine low-loss stable phase cable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first insulation layer wrapping structure of the ultra-fine, high-adhesion wrapped radio frequency coaxial cable in an embodiment of this utility model;

[0019] Figure 2This is a schematic diagram of the second insulation layer wrapping structure of the ultra-fine, high-adhesion wrapped radio frequency coaxial cable in an embodiment of this utility model.

[0020] The attached figures are labeled as follows:

[0021] 1-Inner conductor, 2-First insulating layer, 3-Second insulating layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the detailed description of the embodiments of this application provided below with reference to the accompanying drawings is intended merely to illustrate selected embodiments of this application and is not intended to limit the scope of protection claimed by this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0026] See Figure 1 , Figure 2 This utility model provides an ultra-fine, high-adhesion wrapped radio frequency coaxial cable. The wrapped radio frequency coaxial cable includes an inner conductor 1, a first insulating layer 2, and a second insulating layer 3. The inner conductor 1 is located at the axis of the cable. The first insulating layer 2 and the second insulating layer 3 are wrapped around the surface of the inner conductor 1 from the inside to the outside. The wrapping directions of the first insulating layer 2 and the second insulating layer 3 are opposite.

[0027] To avoid the difficulty in ensuring the consistency of the outer diameter of the same layer when wrapping traditional cables, the outer diameter of the first insulation layer 2 of the same layer of the wrapped radio frequency coaxial cable should be consistent at all points, and the outer diameter of the second insulation layer 3 of the same layer should be consistent at all points.

[0028] This wrapped RF coaxial cable has a diameter of no more than 2mm, solving the stability problem of ultra-fine, ultra-high frequency, low-loss, and stable phase cables with a diameter of less than 2mm.

[0029] The first insulating layer 2 and the second insulating layer 3 mentioned here are wrapped around the surface of the inner conductor 1 in sequence from the inside to the outside. Specifically, the innermost first insulating layer 2 is wrapped around the inner conductor 1, then a second insulating layer 3 is wrapped around the innermost first insulating layer 2, and then another first insulating layer 2 is wrapped around the inner second insulating layer 3. The first insulating layer 2 and the second insulating layer 3 are repeated in this way.

[0030] Optionally, the first insulating layer 2 has n layers, and the second insulating layer 3 has n layers or n-1 layers, where n≥2.

[0031] Optionally, the first insulating layer 2 is wrapped around the surface of the inner conductor 1 along the first direction, the first insulating layer 3 is wrapped around the surface of the first insulating layer 2 along the second direction, the second insulating layer 2 is wrapped around the surface of the first insulating layer 3 along the first direction, and the second insulating layer 3 is wrapped around the surface of the second insulating layer 2 along the second direction. The first insulating layer 2 and the second insulating layer 3 are alternately and repeatedly arranged until the nth first insulating layer 2 or the nth second insulating layer 3 is wrapped.

[0032] Specifically, if the number of layers of the first insulating layer 2 is n, and the number of layers of the second insulating layer 3 is n-1, then the outermost layer of the wrapped RF coaxial cable is the nth first insulating layer 2. If the number of layers of the first insulating layer 2 is n, and the number of layers of the second insulating layer 3 is n, then there is another nth second insulating layer 3 on the surface of the nth first insulating layer 2. Figure 1 , Figure 2 As shown, if the first direction of the wrapping of the first insulating layer 2 is defined as the positive direction, then the second direction of the wrapping of the second insulating layer 3 is the negative direction. Using a positive and negative wrapping method greatly increases the adhesion between the insulating layer and the inner conductor.

[0033] Optionally, the tail of the first insulating layer 2 is connected to the head of the first insulating layer 3, the tail of the first insulating layer 3 is connected to the head of the second insulating layer 2, and the tail of the second insulating layer 2 is connected to the head of the second insulating layer 3, until the head of the nth insulating layer 2 is connected to the tail of the (n-1)th insulating layer 3, or until the tail of the nth insulating layer 2 is connected to the head of the nth insulating layer 3.

[0034] Specifically, this wrapped RF coaxial cable adopts a single-layer wrapping process. After the first insulation layer 2 is wrapped, it is turned around and then wrapped with the first insulation layer 3. The wrapping forces of the first insulation layer 2 and the second insulation layer 3 are opposite. After multiple wrapping, the insulation layer structure is stable. After the wrapping is completed, the first insulation layer 2 and the second insulation layer 3 are heated and treated to increase the viscosity between the first insulation layer 2 and the second insulation layer 3 and the adhesion between the first insulation layer 2, the second insulation layer 3 and the inner conductor 1. Therefore, the cable has very good stability.

[0035] In this embodiment, both the first insulating layer 2 and the second insulating layer 3 are made of PTFE material, and after the wrapping is completed, they are heated for a certain period of time at a temperature close to the melting point of PTFE, which greatly increases the adhesion between the insulating layer and the inner conductor 1. The wrapping of the first insulating layer 2 and the second insulating layer 3 is a single-layer wrapping, and the consistency of the outer diameter of each wrapping layer is easy to control.

[0036] Optionally, the adhesion of the wrapped RF coaxial cable can reach 4N.

[0037] The wrapped radio frequency coaxial cable provided by this utility model has been preliminarily tested and verified. Its adhesion is about 3N greater than that of conventional wrapped cables. With conventional methods, ultra-fine wrapped cables have almost no adhesion, but after changing the wrapping method, the adhesion can reach about 4N, which greatly improves the performance stability of ultra-fine low-loss stable phase cable.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A type of ultra-fine, high-adhesion wrapped radio frequency coaxial cable, characterized in that: It includes an inner conductor, a first insulating layer, and a second insulating layer; The inner conductor is located at the axis, and the first insulating layer and the second insulating layer are repeatedly wrapped around the surface of the inner conductor from the inside to the outside, with the wrapping directions of the first insulating layer and the second insulating layer being opposite. The outer diameter of the first insulating layer in the same layer is consistent, and the outer diameter of the second insulating layer in the same layer is consistent; The diameter of the wrapped radio frequency coaxial cable does not exceed 2mm.

2. The ultra-fine, high-adhesion wrapped radio frequency coaxial cable according to claim 1, characterized in that: The first insulating layer has n layers, and the second insulating layer has n layers or n-1 layers, where n≥2.

3. The ultra-fine, high-adhesion wrapped radio frequency coaxial cable according to claim 2, characterized in that: The first insulating layer is wrapped around the surface of the inner conductor along a first direction, the second insulating layer is wrapped around the surface of the first insulating layer along a second direction, the first insulating layer is wrapped around the surface of the second insulating layer along a first direction, and the second insulating layer is wrapped around the surface of the first insulating layer along a second direction. The first insulating layer and the second insulating layer are alternately and repeatedly arranged until the wrapping of the nth first insulating layer or the nth second insulating layer is completed.

4. The ultra-fine, high-adhesion wrapped radio frequency coaxial cable according to claim 3, characterized in that: The tail of the first insulating layer of the first layer is connected to the head of the second insulating layer of the first layer, the tail of the second insulating layer of the first layer is connected to the head of the first insulating layer of the second layer, the tail of the first insulating layer of the second layer is connected to the head of the second insulating layer of the second layer, and so on, until the head of the first insulating layer of the nth layer is connected to the tail of the second insulating layer of the (n-1)th layer, or until the tail of the first insulating layer of the nth layer is connected to the head of the second insulating layer of the nth layer.

5. The ultra-fine, high-adhesion wrapped radio frequency coaxial cable according to any one of claims 1-4, characterized in that: Both the first and second insulating layers are single-layer insulating structures.

6. The ultra-fine, high-adhesion wrapped radio frequency coaxial cable according to claim 5, characterized in that: The adhesion of the wrapped radio frequency coaxial cable can reach 4N.

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