CN215118448U - High-temperature-resistant low-loss flexible radio frequency coaxial cable - Google Patents
High-temperature-resistant low-loss flexible radio frequency coaxial cable Download PDFInfo
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- CN215118448U CN215118448U CN202121366752.1U CN202121366752U CN215118448U CN 215118448 U CN215118448 U CN 215118448U CN 202121366752 U CN202121366752 U CN 202121366752U CN 215118448 U CN215118448 U CN 215118448U
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Abstract
The utility model discloses a high temperature resistant low-loss flexible radio frequency coaxial cable, include: an inner conductor; an insulating layer disposed outside the inner conductor; the outer conductor layer is arranged on the outer side of the insulating layer and comprises a first outer conductor layer formed by wrapping silver-plated copper strips and a second outer conductor layer formed by weaving silver-plated copper wires; the barrier layer is arranged on the outer side of the outer conductor layer and comprises a first barrier layer and a second barrier layer which are formed by lapping and wrapping a PTFE tape and a polyimide film in opposite directions; and the sheath layer is arranged on the outer side of the barrier layer. The utility model discloses can make the cable normally work in high temperature environment, have good electric conductive property, dielectric loss is little, and cable loss is ultralow, has better high temperature resistant, low loss and softness can, has effectively satisfied the operation requirement of environments such as aerospace, military project, radar.
Description
Technical Field
The utility model relates to the technical field of cables, concretely relates to flexible radio frequency coaxial cable of high temperature resistant low-loss.
Background
With the rapid development of communication technology, conventional radio frequency coaxial cables cannot meet the use requirements of some special environments, such as cables applied to aerospace, military industry, radar and other environments, and have high requirements on temperature and electrical performance indexes such as amplitude and phase, so that the radio frequency coaxial cables are required to have the functions of high temperature resistance, low loss, flexibility and the like.
However, some existing radio frequency coaxial cables basically use Polytetrafluoroethylene (PTFE) as an insulating material and high temperature fluoroplastic perfluoroethylene propylene (FEP) or Polyperfluoroalkoxy (PFA) as a sheath material, and have a tolerance temperature of substantially less than 165 ℃, which can reach 200 ℃ in a short time, and the tolerance temperature does not meet the requirement of high temperature resistance. While other radio frequency coaxial cables using materials with high temperature resistance level such as silicon dioxide, mica and the like as media have high temperature resistance, but have large dielectric loss due to large dielectric constant of the materials, and are difficult to bend after being formed, so that the requirements of low loss and flexibility are not met.
It is noted that this section is intended to provide a background or context to the embodiments of the disclosure that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a high temperature resistant low-loss flexible radio frequency coaxial cable to the radio frequency coaxial cable who solves among the prior art can not reach the problem that the required high temperature resistant of environment such as aerospace, war industry, radar, low-loss and softness etc. required.
The embodiment of the utility model provides a high temperature resistant low-loss flexible radio frequency coaxial cable, include:
an inner conductor;
the insulating layer is arranged on the outer side of the inner conductor;
an outer conductor layer disposed outside the insulating layer; the outer conductor layer comprises a first outer conductor layer and a second outer conductor layer which are sequentially arranged from inside to outside, the first outer conductor layer is formed by wrapping silver-plated copper strips, and the second outer conductor layer is formed by weaving silver-plated copper wires;
the barrier layer is arranged on the outer side of the outer conductor layer; the barrier layer comprises a first barrier layer and a second barrier layer which are sequentially arranged from inside to outside, and the first barrier layer and the second barrier layer are formed by lapping and wrapping a PTFE tape and a polyimide film in opposite directions;
and the sheath layer is arranged on the outer side of the barrier layer.
As the utility model discloses a preferred mode, the insulating layer includes first insulating sublayer and the second insulating layer that sets gradually from inside to outside, first insulating sublayer with the second insulating layer is formed by multilayer low density PTFE interband opposite direction around the package.
As a preferable mode of the present invention, the sheath layer is woven from glass fibers.
As the preferred mode of the utility model, the inner conductor is a single-core silver-plated copper wire or a multi-core silver-plated copper stranded wire.
The embodiment of the utility model provides a flexible radio frequency coaxial cable of high temperature resistant low-loss, it includes inner conductor, insulating layer, outer conductor layer, barrier layer and the restrictive coating that sets gradually from inside to outside, and wherein the outer conductor layer includes again and weaves the second outer conductor layer that forms by silver-plated copper strips around the first outer conductor layer that the package formed and by silver-plated copper lines, and the barrier layer includes again to overlap around the first barrier layer and the second barrier layer that the package formed by PTFE area and polyimide film in the opposite direction. The barrier layer with the structure is arranged in the radio frequency coaxial cable, so that the high temperature resistance of the radio frequency coaxial cable is obviously improved, the cable can normally work in a high temperature environment, the long-term temperature resistance can reach more than 300 ℃, the short-time temperature resistance can reach 400 ℃, and meanwhile, the radio frequency coaxial cable also has the flexibility; the outer conductor layer with the structure has good conductivity, low dielectric loss and ultralow cable loss, and also has good high-temperature resistance.
The radio frequency coaxial cable has better high temperature resistance, low loss and flexibility, and effectively meets the use requirements of environments such as aerospace, military industry, radar and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high temperature resistant low-loss flexible radio frequency coaxial cable provided by an embodiment of the present invention.
The cable comprises an inner conductor 1, an inner conductor 2, an insulating layer 2-1, a first insulating layer 2-2, a second insulating layer 3, an outer conductor layer 3-1, a first outer conductor layer 3-2, a second outer conductor layer 4, a barrier layer 4-1, a first barrier layer 4-2, a second barrier layer 5 and a sheath layer.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The working temperature range of the conventional radio frequency coaxial cable is basically between-65 ℃ and +165 ℃, but with the rapid development of communication technology, the conventional radio frequency coaxial cable cannot meet the requirements of some special environments, such as aerospace, military industry, radar and other environments, on temperature and electrical performance indexes such as amplitude, phase and the like, so that the radio frequency coaxial cable is required to have the functions of high temperature resistance, low loss, flexibility and the like.
Based on this, referring to fig. 1, the embodiment of the utility model discloses a high temperature resistant low-loss flexible radio frequency coaxial cable, it includes:
an inner conductor 1;
an insulating layer 2 disposed outside the inner conductor 1;
an outer conductor layer 3 disposed outside the insulating layer 2; the outer conductor layer 3 comprises a first outer conductor layer 3-1 and a second outer conductor layer 3-2 which are sequentially arranged from inside to outside, the first outer conductor layer 3-1 is formed by wrapping silver-plated copper strips, and the second outer conductor layer 3-2 is formed by weaving silver-plated copper wires;
a barrier layer 4 disposed outside the outer conductor layer 3; the barrier layer 4 comprises a first barrier layer 4-1 and a second barrier layer 4-2 which are sequentially arranged from inside to outside, and the first barrier layer 4-1 and the second barrier layer 4-2 are formed by lapping and wrapping PTFE tapes and polyimide films in opposite directions;
and the sheath layer 5 is arranged outside the barrier layer 4.
In this embodiment, the high temperature resistant low-loss flexible radio frequency coaxial cable mainly includes an inner conductor, an insulating layer, an outer conductor layer, a barrier layer and a sheath layer, which are sequentially arranged from inside to outside.
In order to enable the high-temperature-resistant low-loss flexible radio-frequency coaxial cable to have better high-temperature resistance, raw materials of the cable from the inner conductor to the sheath are all made into high-temperature-resistant materials, and a barrier layer is specially arranged. The barrier layer is preferably designed into a two-layer structure and comprises a first barrier layer and a second barrier layer which are sequentially arranged from inside to outside, and the first barrier layer and the second barrier layer are formed by lapping and wrapping PTFE belts and polyimide films in the opposite directions.
After the barrier layer adopts the structure, the high-temperature resistance of the radio frequency coaxial cable is obviously improved, and the cable can normally work in a high-temperature environment.
In order to make this flexible radio frequency coaxial cable of high temperature resistant low loss have better low-loss performance, because the loss of cable is by the inner conductor, outer conductor layer and insulator layer triplex decide, consequently not only set up the raw and other materials that the inner conductor adopted to the material that electric conductive property is good, set up the raw and other materials that the insulator layer adopted to the less material of loss simultaneously, still with outer conductor layer preferred design into two-layer structure, including first outer conductor layer and the second outer conductor layer that sets gradually from inside to outside, wherein first outer conductor layer is formed by the silver-plated copper strips around the package, the second outer conductor layer is then woven by the silver-plated copper wires and is formed.
After the outer conductor layer adopts the structure, the cable has good conductivity, small loss and ultralow cable loss.
In order to enable the high-temperature-resistant low-loss flexible radio-frequency coaxial cable to have good flexibility, the insulator and the sheath are made of materials with good flexibility and in a forming mode, and the first barrier layer and the second barrier layer in the barrier layers are formed by lapping and wrapping PTFE belts and polyimide films in opposite directions, so that the high-temperature-resistant low-loss flexible radio-frequency coaxial cable has good flexibility and stable performance.
By comprehensively adopting the structure, the high-temperature-resistant low-loss flexible radio frequency coaxial cable has better high-temperature resistance, low loss and flexibility, and effectively meets the use requirements of environments such as aerospace, military industry, radar and the like.
The PTFE tape is a low-density polytetrafluoroethylene tape.
In an alternative embodiment provided by the present application, the insulating layer 2 includes a first insulating sub-layer 2-1 and a second insulating layer 2-2 sequentially disposed from inside to outside, and the first insulating sub-layer 2-1 and the second insulating layer 2-2 are formed by winding multiple layers of low-density PTFE tape in opposite directions.
In particular, the insulating layer is preferably designed as a two-layer structure, which includes a first insulating sublayer and a second insulating layer arranged in sequence from the inside to the outside. The first insulating sub-layer and the second insulating layer are formed by oppositely lapping a plurality of layers of low-density PTFE tape layers.
After the insulating layer adopts the structure, the high-temperature-resistant low-loss flexible radio frequency coaxial cable further has soft performance and low dielectric loss, so that the loss of the high-temperature-resistant low-loss flexible radio frequency coaxial cable is further reduced.
In the radio frequency coaxial cable in the prior art, the insulator is mostly formed by materials such as Polytetrafluoroethylene (PTFE), Polyethylene (PE), ethylene tetrafluoroethylene copolymer (ETFE) and the like, and the high temperature resistance is not strong. In order to enable the cable to have good high-temperature resistance, the manufacturing materials of the cable are selected from materials with high temperature resistance grades such as silicon dioxide, quartz, mica and the like, however, the cable cannot be bent after the materials are molded, and the dielectric constants of the silicon dioxide, the quartz and the mica are overlarge and the dielectric loss is very large.
In an alternative embodiment provided by the present application, the sheath layer 5 is woven from glass fibers.
Specifically, the sheath layer is preferably woven by glass fibers, so that the high temperature resistance of the high-temperature-resistant low-loss flexible radio frequency coaxial cable is further enhanced, and the flexibility of the cable is further enhanced.
In the radio frequency coaxial cable in the prior art, the material adopted by the sheath is different according to the use temperature and the environment. For example, the working Temperature of Polyurethane (TPU) materials is basically between-55 ℃ and +85 ℃, the working temperature of materials such as polyvinyl chloride (PVC), Low Smoke Zero Halogen (LSZH) and the like is basically between-40 ℃ and +70 ℃, the working temperature range of materials such as high temperature fluoroplastic Fluorinated Ethylene Propylene (FEP), poly (perfluoroalkoxy) (PFA) and the like is greatly improved and can be between-65 ℃ and +165 ℃, but the high temperature resistant use requirement of radio frequency coaxial cables in the environments such as aerospace, military industry, radar and the like cannot be met.
In an alternative embodiment provided by the present application, the inner conductor 1 is a single-core silver-plated copper wire or a multi-core silver-plated copper stranded wire.
Particularly, the inner conductor preferably adopts a single-core silver-plated copper wire or a multi-core silver-plated copper stranded wire, the material has good conductivity, the loss of the cable is ultralow, the material also has excellent high-temperature resistance, and the use requirements in the environments of aerospace, war industry, radar and the like can be effectively met.
To sum up, the embodiment of the utility model provides a flexible radio frequency coaxial cable of high temperature resistant low-loss, it includes inner conductor, insulating layer, outer conductor layer, barrier layer and the restrictive coating that sets gradually from inside to outside, and wherein the outer conductor layer includes again and weaves the second outer conductor layer that forms by silver-plated copper strip around the first outer conductor layer that the package formed and by silver-plated copper line, and the barrier layer includes again to overlap around the first barrier layer and the second barrier layer that the package formed by PTFE area and polyimide film in the opposite direction. The barrier layer with the structure is arranged in the radio frequency coaxial cable, so that the high temperature resistance of the radio frequency coaxial cable is obviously improved, the cable can normally work in a high temperature environment, the long-term temperature resistance can reach more than 300 ℃, the short-time temperature resistance can reach 400 ℃, and meanwhile, the radio frequency coaxial cable also has the flexibility; the outer conductor layer with the structure has good conductivity, low dielectric loss and ultralow cable loss, and also has good high-temperature resistance.
The radio frequency coaxial cable has better high temperature resistance, low loss and flexibility, and effectively meets the use requirements of environments such as aerospace, military industry, radar and the like.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the products of the present invention are used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A high temperature resistant low loss flexible radio frequency coaxial cable, comprising:
an inner conductor;
the insulating layer is arranged on the outer side of the inner conductor;
an outer conductor layer disposed outside the insulating layer; the outer conductor layer comprises a first outer conductor layer and a second outer conductor layer which are sequentially arranged from inside to outside, the first outer conductor layer is formed by wrapping silver-plated copper strips, and the second outer conductor layer is formed by weaving silver-plated copper wires;
the barrier layer is arranged on the outer side of the outer conductor layer; the barrier layer comprises a first barrier layer and a second barrier layer which are sequentially arranged from inside to outside, and the first barrier layer and the second barrier layer are formed by lapping and wrapping a PTFE tape and a polyimide film in opposite directions;
and the sheath layer is arranged on the outer side of the barrier layer.
2. The high temperature resistant low loss flexible radio frequency coaxial cable according to claim 1, wherein the insulating layer comprises a first insulating sub-layer and a second insulating layer sequentially arranged from inside to outside, and the first insulating sub-layer and the second insulating layer are formed by winding a plurality of layers of low density PTFE tapes in opposite directions.
3. The high temperature resistant low loss flexible radio frequency coaxial cable of claim 1 or 2, wherein the sheath layer is woven from glass fibers.
4. The high temperature resistant low loss flexible radio frequency coaxial cable of claim 1 or 2, wherein the inner conductor is a single core silver-plated copper wire or a multi-core silver-plated copper stranded wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121366752.1U CN215118448U (en) | 2021-06-18 | 2021-06-18 | High-temperature-resistant low-loss flexible radio frequency coaxial cable |
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| CN202121366752.1U CN215118448U (en) | 2021-06-18 | 2021-06-18 | High-temperature-resistant low-loss flexible radio frequency coaxial cable |
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| CN215118448U true CN215118448U (en) | 2021-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822956A (en) * | 2022-04-18 | 2022-07-29 | 陕西华达线缆技术有限责任公司 | Ultra-high temperature flexible low-loss radio frequency coaxial cable for missile loading |
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2021
- 2021-06-18 CN CN202121366752.1U patent/CN215118448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822956A (en) * | 2022-04-18 | 2022-07-29 | 陕西华达线缆技术有限责任公司 | Ultra-high temperature flexible low-loss radio frequency coaxial cable for missile loading |
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