Radio frequency coaxial cable with reinforcing layer
By improving the structural design of radio frequency coaxial cables, including the combination of inner conductor, insulation layer, outer conductor, reinforcing layer, stabilizing layer and sheath layer, the problems of material consistency and processing precision were solved, the stability and life of the cable were improved, and low loss and high efficiency signal transmission were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-17
AI Technical Summary
Existing RF coaxial cables suffer from poor low-loss amplitude and phase stabilization performance due to variations in material consistency and processing precision, resulting in shortened lifespan and difficulty in meeting the requirements of high-quality cables.
The cable adopts an inside-out structural design, including an inner conductor core, insulation layer, outer conductor, reinforcing layer, stabilizing layer, outer shielding layer, and sheath layer. The insulation layer uses microporous polytetrafluoroethylene film, the outer conductor uses silver-plated copper tape spirally wrapped, and a single-sided self-adhesive aluminum foil film is added to the outside of the outer conductor. The stabilizing layer uses microporous polytetrafluoroethylene film, the outer shielding layer uses silver-plated copper wire braid, and the sheath layer is wrapped with fluorinated ethylene propylene copolymer, which enhances the cable's shielding performance and mechanical stability.
It improves the mechanical phase stability and amplitude stability of the cable, extends its service life by 30%, and achieves temperature phase stability within 800 PPM, mechanical phase stability within ±5°, and mechanical amplitude stability within ±0.05 dB in the temperature range of -45~85℃.
Smart Images
Figure CN224006117U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable technology, specifically relating to a radio frequency coaxial cable with a reinforcing layer. Background Technology
[0002] With the rise of emerging technologies such as 5G and the Internet of Things, the radio frequency (RF) coaxial cable industry has ushered in new development opportunities. The rapid development of new energy vehicles, wind power, solar power, and nuclear power has led to a rapid increase in demand for RF coaxial cables. These cables place relatively high technical requirements on manufacturers, benefiting large enterprises. In the field of wireless communication, RF coaxial cables play a crucial role in base station construction and signal transmission.
[0003] With the promotion of 5G technology, the demand for radio frequency (RF) coaxial cables in the field of wireless communication will further increase. In addition, RF coaxial cables also have certain application needs in industrial automation, aerospace, and military fields. The growth in these niche markets provides new growth points for the RF coaxial cable industry. The coaxial cable industry's need for technological innovation is increasing. Companies need to continuously invest in R&D to improve product transmission rates, reduce transmission losses, enhance anti-interference capabilities, ensure stable performance, and meet stringent requirements for cable performance in harsh external environments, as well as longer lifespans, to meet market demands for high-quality coaxial cables. Currently, most cables on the market use a microporous PTFE wrapping with a silver-plated copper tape spiral wrapping structure. This structure is currently recognized as a low-loss, amplitude- and phase-stable RF coaxial cable structure. However, this structure has high requirements for the materials themselves; the consistency of the materials must be good to achieve optimal results. In reality, due to batch differences and variations in processing precision, it is difficult for the dielectric and copper tape currently on the market to achieve the best low-loss, amplitude- and phase-stable effect. Furthermore, due to the characteristics of this structure, the lifespan is 50% shorter than that of traditional solid-core cables. Utility Model Content
[0004] To address the problems in the existing technology, this utility model provides a radio frequency coaxial cable with a reinforcing layer, which features low loss, stable performance, ultra-stable amplitude and phase, and a 30% increase in service life compared to traditional low-loss stable amplitude and phase radio frequency coaxial cables.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: It includes an inner conductor core, an insulation layer, an outer conductor, a reinforcing layer, a stabilizing layer, an outer shielding layer, and a sheathing layer arranged coaxially from the inside out. The insulation layer is made of microporous polytetrafluoroethylene film wrapped around the outside of the inner conductor core. The outer conductor is made of tape wrapped around the outside of the insulation layer. The reinforcing layer is made of single-sided self-adhesive aluminum foil film wrapped around the outside of the outer conductor. The stabilizing layer is made of microporous polytetrafluoroethylene film wrapped around the outside of the reinforcing layer. The outer shielding layer is made of filament material covering the outside of the stabilizing layer. The sheathing layer is made of fluorinated ethylene propylene copolymer wrapped around the outside of the outer shielding layer.
[0006] Preferably, the inner conductor core is a single-core silver-plated copper metal core.
[0007] Preferably, the insulating layer is a microporous polytetrafluoroethylene film.
[0008] Preferably, the insulating layer is made of microporous polytetrafluoroethylene film with a thickness of 0.076 mm and 0.102 mm.
[0009] Preferably, the insulating layer is made of microporous polytetrafluoroethylene film with a density of 1.6 g / cm³.
[0010] Preferably, the insulating layer is made of microporous polytetrafluoroethylene film with 1 / 2 and 2 / 3 overlapping edges.
[0011] Preferably, the insulating layer is made of a microporous polytetrafluoroethylene film wrapped in four layers.
[0012] Preferably, the outer conductor is formed by wrapping silver-plated copper strip to form a tubular structure.
[0013] Preferably, the outer conductor is formed by spirally wrapping silver-plated copper strip to form a spiral tubular structure.
[0014] Preferably, the silver-plated copper strip is wrapped with a 1 / 2 overlap.
[0015] Preferably, the reinforcing layer is made of a single-sided self-adhesive aluminum foil film wrapped around and covering the outside of the outer conductor.
[0016] Preferably, the reinforcing layer is made of single-sided self-adhesive aluminum foil with a thickness of 0.048 mm.
[0017] Preferably, the reinforcing layer is made of single-sided self-adhesive aluminum foil wrapped with a 1 / 2 overlap.
[0018] Preferably, the reinforcing layer is wrapped with a single-sided self-adhesive aluminum foil film with the adhesive side facing up.
[0019] Preferably, the stabilizing layer is made of a microporous polytetrafluoroethylene film wrapped around and covering the outside of the reinforcing layer.
[0020] Preferably, the stabilizing layer is wrapped with a microporous polytetrafluoroethylene film with a thickness of 0.076 mm.
[0021] Preferably, the stabilizing layer is made of microporous polytetrafluoroethylene film wrapped with a 1 / 2 overlap.
[0022] Preferably, the outer shielding layer is made of silver-plated copper wires interwoven and covers the outside of the stabilizing layer.
[0023] Preferably, the outer shielding layer covers the stabilizing layer by a coverage rate of 93% or more.
[0024] Preferably, the sheath layer is a tubular structure extruded from fluorinated ethylene propylene copolymer.
[0025] Preferably, the sheath layer is a tubular structure extruded from fluorinated ethylene propylene copolymer with a single-side wall thickness greater than or equal to 0.25 mm.
[0026] Compared with existing technologies, this invention uses a microporous PTFE film-wrapped core wire as the insulation layer and a silver-plated copper strip spirally wrapped as the outer conductor. Based on this traditionally recognized low-loss, amplitude- and phase-stable structure, a single-sided self-adhesive aluminum foil is wrapped in reverse on the outside of the outer conductor to enhance the performance of the silver-plated copper strip and limit its movement. Then, a microporous PTFE film is wrapped around the outside of the self-adhesive aluminum foil for reinforcement. Compared with traditional low-loss stable cables, the addition of the single-sided self-adhesive aluminum foil in reverse wrapping effectively improves the shielding performance of the silver strip itself and effectively limits the movement between the silver-plated copper strip and the dielectric. The stabilizing effect of the microporous PTFE film wrapping effectively reduces damage to the cable core wire caused by bending and vibration. This achieves excellent mechanical phase stability and mechanical amplitude stability, resulting in ultra-stable amplitude and phase. It is durable, with a lifespan more than 30% longer than traditional amplitude- and phase-stable RF coaxial cables. Within a temperature range of -45~85℃, the temperature phase can reach within 800PPM. Its mechanical phase stability can reach within ±5°. Its mechanical amplitude stability can reach within ±0.05dB.
[0027] Furthermore, the inner conductor core uses a single-core silver-plated copper metal core, which can greatly improve the stability and signal transmission of the cable.
[0028] Furthermore, the insulation layer uses microporous polytetrafluoroethylene film wrapped around the core wire insulation layer and adopts a spiral wrapping structure, which effectively improves attenuation and transmission efficiency. It has stable amplitude and phase, and the temperature phase can reach within 800PPM in the temperature range of -45~85℃.
[0029] Furthermore, the outer conductor adopts a spiral tubular structure formed by spirally wrapping silver-plated copper strip, wherein the silver-plated copper strip is wrapped with 1 / 2 overlapping edge; the spiral tubular structure is the most stable structure among low-loss and stable phase structures internationally, effectively improving the transmission performance of the cable.
[0030] Furthermore, the reinforcing layer is made of single-sided self-adhesive aluminum foil film wrapped around the outer conductor with the adhesive side facing upwards. The reinforcing layer has a 1 / 2 overlap edge, which enhances the performance of the outer conductor. The single-sided self-adhesive aluminum foil film has a thickness of 0.048mm, which enhances the performance of the silver-plated copper strip and limits the movement space.
[0031] Furthermore, the stabilizing layer is made of microporous polytetrafluoroethylene film wrapped around the reinforcing layer, and the stabilizing layer has a 1 / 2 overlap, which forms a reinforcement on the reinforcing layer. The film has a thickness of 0.76mm, which plays a certain role in stabilization and protection.
[0032] Furthermore, the outer shielding layer is made of silver-plated copper wires interwoven and covered on the stabilizing layer, and the coverage of the outer shielding layer is not less than 93%. It forms a tight shielding layer on the stabilizing layer. This woven outer shielding mainly plays the role of shielding against electromagnetic interference and improving the mechanical strength of the product.
[0033] Furthermore, the sheath layer adopts a tubular structure extruded from fluorinated ethylene propylene copolymer, which surrounds the outer layer of the braided outer shield, serving to protect the cable. The sheath layer material, made of fluorinated ethylene propylene copolymer, gives it excellent resistance to abrasion and mechanical properties, chemical and moisture resistance, and resistance to various environments. It exhibits high and low temperature resistance, capable of long-term use within a temperature range of -55℃ to 160℃, and short-term high-temperature resistance up to 200℃. It effectively protects the inner conductor core of the cable, ensuring the cable's inherent mechanical properties and durability, and ensuring its use in aerospace environments. This results in excellent mechanical phase stability and mechanical amplitude stability, achieving ultra-stable amplitude and phase. It is durable, with a lifespan more than 30% longer than traditional amplitude- and phase-stable RF coaxial cables. Within a temperature range of -45℃ to 85℃, the temperature phase can reach within 800PPM. Its mechanical phase stability can reach within ±5°. Its mechanical amplitude stability can reach within ±0.05dB. Attached Figure Description
[0034] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;
[0035] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention.
[0036] Among them, 1-inner conductor core, 2-insulation layer, 2-1 insulation film, 3-outer conductor, 4-reinforcing layer, 4-1 reinforcing foil, 5-stabilizing layer, 5-1 stabilizing film, 6-outer shielding layer, 7-sheathing layer, 7-1 fluorinated ethylene propylene copolymer. Detailed Implementation
[0037] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] This utility model provides a radio frequency coaxial cable with a reinforcing layer, which is particularly suitable for environments with harsh temperature and radiation requirements. See [link to relevant documentation]. Figure 1 and Figure 2 It includes an inner conductor core 1, an insulation layer 2, an outer conductor 3, a reinforcing layer 4, a stabilizing layer 5, an outer shielding layer 6, and a sheath layer 7 arranged coaxially from the inside to the outside. The insulation layer 2 is made of microporous polytetrafluoroethylene film wrapped around the core wire and covering the outside of the inner conductor core 1. The outer conductor 3 is wrapped around the outside of the insulation layer 2 with tape. The reinforcing layer 4 is made of single-sided self-adhesive aluminum foil film wrapped around the outside of the outer conductor 3. The stabilizing layer 5 is made of microporous polytetrafluoroethylene film wrapped around the core wire and covering the outside of the reinforcing layer 4. The outer shielding layer 6 is made of filament material and covering the outside of the stabilizing layer 5. The sheath layer 7 is made of fluorinated ethylene propylene copolymer wrapped around the outside of the outer shielding layer 6.
[0039] This embodiment employs a microporous PTFE film-wrapped core wire as the insulation layer and a spirally wrapped silver-plated copper strip as the outer conductor. Based on this conventionally recognized low-loss, amplitude- and phase-stable structure, a single-sided self-adhesive aluminum foil is wrapped in reverse on the outside of the outer conductor to enhance the performance of the silver-plated copper strip and limit its movement. Then, a microporous PTFE film is wrapped around the outside of the self-adhesive aluminum foil for reinforcement. Compared to traditional low-loss stable cables, the addition of the single-sided self-adhesive aluminum foil in reverse wrapping effectively improves the shielding performance of the silver strip itself and effectively limits the movement between the silver-plated copper strip and the dielectric. The stabilizing effect of the microporous PTFE film wrapping effectively reduces damage to the cable core wire caused by bending and vibration. This achieves excellent mechanical phase stability and mechanical amplitude stability, resulting in ultra-stable amplitude and phase. It is durable, with a lifespan more than 30% longer than traditional amplitude- and phase-stable RF coaxial cables. Within a temperature range of -45~85℃, the temperature phase can reach within 800PPM. Its mechanical phase stability can reach within ±5°. Its mechanical amplitude stability can reach within ±0.05dB.
[0040] Preferably, the inner conductor core 1 is a single-core silver-plated copper metal core, which can greatly improve the stability and signal transmission of the cable.
[0041] Preferably, the insulation layer 2 uses a microporous polytetrafluoroethylene film wrapped around the core wire as the insulation layer, and the film thickness is 0.076 mm and 0.102 mm with 1 / 2 and 2 / 3 overlap for wrapping. The film density is 1.6 g / cm³, which can effectively increase the strength of the core wire itself, facilitate processing, effectively enhance the signal transmission of the cable, improve attenuation, effectively reduce the influence of external temperature changes on phase, and adopt a spiral wrapping structure to effectively improve attenuation and transmission efficiency. It has stable amplitude and phase, and the temperature phase can reach within 800 PPM in the temperature range of -45~85℃.
[0042] Preferably, the outer conductor 3 is made of silver-plated copper strip, and the outer conductor 3 is formed by wrapping the silver-plated copper strip to form a tubular structure. More preferably, the silver-plated copper strip is spirally wrapped to form a spiral tubular structure, wherein the silver-plated copper strip is wrapped with 1 / 2 overlapping edge. The spiral tubular structure is the most stable structure among low-loss and stable phase structures internationally, which effectively improves the transmission performance of the cable.
[0043] Preferably, the reinforcing layer 4 uses a single-sided self-adhesive aluminum foil film as the strip material. The reinforcing layer 4 is formed by wrapping the single-sided self-adhesive aluminum foil film to form a tubular structure, with the adhesive side facing upward and wrapped in the opposite direction on the outer conductor 3. The reinforcing layer uses a 1 / 2 overlap edge, and the film thickness is 0.048mm, which makes it easier to attach to the outer conductor 3, enhance the performance of the silver-plated copper strip, and limit the movement space.
[0044] Preferably, the stabilizing layer 5 is made of microporous polytetrafluoroethylene film. The stabilizing layer 5 is formed by wrapping the microporous polytetrafluoroethylene film to form a tubular structure, which is wrapped around the reinforcing layer 4. The stabilizing layer adopts a 1 / 2 overlap, which forms a protection on the reinforcing layer. The film has a thickness of 0.076mm, which reduces the obstruction between conductors. In addition, the microporous polytetrafluoroethylene film wrapping effectively reduces the damage to the cable core wire caused by cable bending and vibration.
[0045] Preferably, the outer shielding layer 6 uses silver-plated copper wire. The outer shielding layer 6 is made of silver-plated copper wire interlaced and woven and covers the outside of the stabilizing layer 5. The coverage of the outer shielding layer 6 is not less than 93%. It forms a tight shielding layer on the stabilizing layer 5. This woven outer shielding mainly plays the role of shielding against electromagnetic interference and improving the mechanical strength of the product.
[0046] Preferably, the sheath layer 7 is a tubular structure extruded from fluorinated ethylene propylene copolymer, surrounding the braided outer shield layer 6 to protect the cable. This gives the sheath layer 7 excellent resistance to abrasion, mechanical properties, chemicals, moisture, and various environments. It is resistant to high and low temperatures, capable of long-term use within a temperature range of -55℃ to 160℃, and can withstand short-term high temperatures up to 200℃. It effectively protects the inner conductor core of the cable, ensuring the cable's inherent mechanical properties and durability, and ensuring its use in aerospace environments. This achieves excellent mechanical phase stability and amplitude stability, resulting in ultra-stable amplitude and phase. It is durable, with a lifespan more than 30% longer than traditional amplitude- and phase-stable RF coaxial cables. Within a temperature range of -45℃ to 85℃, the temperature phase can reach within 800 PPM. Its mechanical phase stability can reach within ±5°, and its mechanical amplitude stability can reach within ±0.05dB.
[0047] This utility model provides a radio frequency coaxial cable with a reinforced layer, which has high and low temperature resistance and can be used for a long time in a temperature range of -55℃ to 165℃. This structure has excellent mechanical phase stability and mechanical amplitude stability, is ultra-stable in amplitude and phase, and is durable, with a service life more than 30% longer than traditional stable amplitude and phase radio frequency coaxial cables. In a temperature range of -45℃ to 85℃, the temperature phase can reach within 800PPM, its mechanical phase stability can reach within ±5°, and its mechanical amplitude stability can reach within ±0.05dB.
[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A radio frequency coaxial cable with a reinforcing layer, characterized in that, The application relates to a coaxial cable, which comprises, from inside to outside, an inner conductor wire core (1), an insulation layer (2), an outer conductor (3), a reinforcing layer (4), a stable layer (5), an outer shielding layer (6) and a sheath layer (7), wherein the insulation layer (2) is made of an insulation layer film (21), the insulation layer film (21) covers the outer side of the inner conductor wire core (1), the outer conductor (3) is wrapped around the outer side of the insulation layer (2) by using a strip, the reinforcing layer (4) is wrapped around the outer side of the outer conductor (3) by using a reinforcing layer foil (41), the stable layer (5) is wrapped around the outer side of the reinforcing layer (4) by using a stable layer film (51), the outer shielding layer (6) covers the outer side of the stable layer (5) by using a wire, and the sheath layer (7) is wrapped around the outer side of the outer shielding layer (6) by using fluorinated ethylene propylene (71).
2. A radio frequency coaxial cable with a reinforcing layer according to claim 1, characterized in that, The insulation layer film (21) is used to form the insulation layer (2) by 4-layer wrapping, the insulation layer film (21) is a microporous polytetrafluoroethylene film, the inner conductor wire core (1) is made of a single-core silver-plated copper metal wire core, the insulation layer film (21) is wrapped around the insulation layer (2), the specification thickness of the insulation layer film (21) is 0.076 and 0.102 mm, and the specification density of the insulation layer film (21) is 1.6 g / cm3.
3. A radio frequency coaxial cable with a reinforcing layer according to claim 2, characterized in that, The insulation layer film (21) of the insulation layer (2) is folded by 1 / 2 and 2 / 3, the insulation layer film (21) is wrapped by 3 layers, and the outer conductor (3) is wrapped by using a silver-plated copper strip to form a tubular structure.
4. A radio frequency coaxial cable with a reinforcing layer according to claim 1, characterized in that, The silver-plated copper strip of the outer conductor (3) is wrapped by 1 / 2 folding, the outer conductor (3) is wrapped by using a silver-plated copper strip to form a spiral tubular structure, and the reinforcing layer foil (41) is wrapped around and covers the outer side of the outer conductor (3).
5. A radio frequency coaxial cable with a reinforcing layer according to claim 4, characterized in that, The reinforcing layer foil (41) is used to form the reinforcing layer (4) by 1 / 2 folding and glue face superposition, the reinforcing layer foil (41) is a single-face self-adhesive aluminum foil film, and the specification thickness of the reinforcing layer foil (41) wrapped around is 0.048 mm.
6. A radio frequency coaxial cable with a reinforcing layer according to claim 1, characterized in that, The stable layer (5) is wrapped around and covers the outer side of the reinforcing layer (4) by using a stable layer film (51), the stable layer film (51) is a microporous polytetrafluoroethylene film, the specification thickness of the stable layer film (51) wrapped around is 0.076 mm, and the stable layer film (51) is wrapped by 1 / 2 folding.
7. A radio frequency coaxial cable with a reinforcing layer according to claim 1, characterized in that, The outer shielding layer (6) is interlaced and woven by using a silver-plated copper wire to cover the outer side of the stable layer (5), and the coverage rate of the outer shielding layer (6) covering the stable layer (5) is greater than or equal to 93%.
8. A radio frequency coaxial cable with a reinforcing layer according to claim 1, characterized in that, The sheath layer (7) is a tubular structure formed by extrusion of fluorinated ethylene propylene (71), and the tubular structure formed by extrusion of the fluorinated ethylene propylene (71) of the sheath layer (7) has a single-edge wall thickness greater than or equal to 0.25 mm.