High-power low-loss radio frequency cable for chariot radar

Abstract

The utility model relates to a cable, in particular to a high-power low-loss radio frequency cable for a chariot radar. The utility model aims to provide the high-power low-loss radio frequency cable for the chariot radar, and the cable has the functions of low attenuation, high power and external electromagnetic interference resistance, and has the characteristics of light weight and high flexibility. According to the technical scheme, the high-power low-loss radio frequency cable for the chariot radar is characterized by comprising a cable core, an inner shielding layer, a middle layer, an outer shielding layer and an outer protection layer, the cable core comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which sequentially wrap the conductor from inside to outside.

Description

Technical Field

[0001] This utility model relates to a cable, specifically a high-power, low-loss radio frequency cable for vehicle radar. Background Technology

[0002] With the rapid development of radar control systems, the performance requirements for related radio frequency (RF) cables are becoming increasingly stringent, especially in scenarios with extremely high demands for high-precision signal transmission, phase consistency, and environmental stability. In addition to meeting basic electrical performance specifications, RF cables must also possess low attenuation, high power carrying capacity, good flexibility, high reliability, and the ability to withstand extreme and complex environments, including high temperatures and various aerospace oils. These RF cables are widely used in radar systems, electronic warfare equipment, high-power transmitting devices, electronic countermeasures systems, internal interconnections of wireless communication base stations, and testing of RF microwave devices.

[0003] Therefore, designing a high-power, low-loss radio frequency cable for vehicle radar is of great significance. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a high-power, low-loss radio frequency cable for vehicle radar. This cable has the functions of low attenuation, high power, and resistance to external electromagnetic interference, and is lightweight and highly flexible.

[0005] The technical solution of this utility model is:

[0006] A high-power, low-loss radio frequency cable for vehicle radar, characterized in that it includes a cable core and an inner shielding layer, a middle layer, an outer shielding layer, and an outer sheath that are sequentially wrapped around the cable core from the inside out.

[0007] The cable core includes a conductor and a first insulation layer, a second insulation layer, and a third insulation layer that sequentially cover the conductor from the inside out.

[0008] The conductor is a stranded copper wire with a plating layer.

[0009] The first insulating layer is a PTFE raw material tape layer, the second insulating layer is a multi-layer LDPTFE tape layer, and the third insulating layer is a PTFE raw material tape layer; the total thickness of the first insulating layer, the second insulating layer, and the third insulating layer is 2.50mm to 2.65mm.

[0010] The inner shielding layer is a silver-plated copper strip armor layer.

[0011] The intermediate layer is a high-temperature resistant composite aluminum foil layer.

[0012] The outer shielding layer is a silver-plated copper wire braided layer.

[0013] The outer protective layer is a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material layer; the thickness of the outer protective layer is 0.50 mm to 0.60 mm.

[0014] The conductor plating thickness is >4μm; the silver-plated copper strip of the inner shielding layer has a thickness of 0.06mm to 0.08mm and a plating thickness of >2μm; the copper wire diameter of the outer shielding layer is 0.10mm to 0.12mm and the plating thickness is >1μm.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model has low attenuation, high power, high shielding, excellent phase stability and excellent high frequency performance, and can operate in the frequency band up to 12GHz.

[0017] 2. This utility model possesses outstanding advantages such as high flexibility, light weight, high temperature resistance, chemical corrosion resistance, excellent mechanical properties, and resistance to salt spray, mold, and moisture. It can withstand high and low temperatures ranging from -55℃ to 200℃, meeting the long-term use requirements of cables at 150℃. Its resistance to chemical corrosion, salt spray, mold, and moisture allows it to operate stably in harsh environments. Its excellent mechanical properties ensure its reliability and durability during use.

[0018] 3. This invention can be widely applied in radar systems, electronic warfare equipment, high-power transmission, electronic countermeasures, internal interconnection of wireless communication base stations, and testing of radio frequency microwave devices. It maintains phase stability of signal transmission even under environmental factors such as temperature changes, mechanical bending, or vibration. Compared to other conventional extruded insulated radio frequency cables, it offers advantages such as lower attenuation, higher power, higher electromagnetic interference resistance, phase stability, higher flexibility, and lighter weight. Attached Figure Description

[0019] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present invention.

[0020] Figure label:

[0021] Conductor 1, First insulating layer 2, Second insulating layer 3, Third insulating layer 4, Inner shielding layer 5, Intermediate layer 6, Outer shielding layer 7, Outer sheath 8. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1As shown, a high-power, low-loss radio frequency cable for vehicle radar includes a cable core, an inner shielding layer 5, an intermediate layer 6, an outer shielding layer 7, and an outer sheath 8. The cable core is covered from the inside out by the inner shielding layer, the intermediate layer, the outer shielding layer, and the outer sheath.

[0024] The cable core includes a conductor 1, a first insulating layer 2, a second insulating layer 3, and a third insulating layer 4. The conductor is covered by the first insulating layer, the second insulating layer, and the third insulating layer in sequence from the inside out.

[0025] The conductor consists of multiple stranded copper wires with a plating layer, employing a multi-strand stranded structure. The copper wires are silver-plated, with a single wire outer diameter of 0.40mm–0.43mm and a plating thickness >4μm, conforming to GJB1640A standard. This multi-strand stranded structure results in a greater number of strands compared to the single conductor in conventional amplitude- and phase-stabilized cables. Furthermore, the conductor of this invention utilizes a multi-stranded, tightly compressed process, achieving a conductor roundness close to that of a commonly used single conductor while significantly improving the cable's flexibility and reducing its bending radius. This structure not only effectively reduces the skin effect loss of conventional single conductors but also further enhances the cable's high-frequency conductivity, ensuring high-frequency phase stability.

[0026] The first insulating layer, the second insulating layer, and the third insulating layer constitute a low-density microporous tape (LDPTFE, density 0.7 g / cm³). 3 ) and polytetrafluoroethylene raw material tape (PTFE, density 1.5~1.6g / cm³) 3 The multi-layered overlapping wrapping structure involves first wrapping a layer of PTFE raw material tape (first insulation layer) around the conductor, then wrapping multiple layers (13 layers) of LDPTFE tape (second insulation layer), and finally wrapping another layer of PTFE raw material tape (third insulation layer). To achieve low signal attenuation, cables often require larger dimensions. By using multi-layered wrapping and controlling the tension of the LDPTFE layer within the 2N–4N range, the tension of the PTFE raw material tape layer within the 5N–6N range, and the overlap rate within the 50%–67% range, the required outer diameter of the cable can be met. While ensuring low attenuation and high power transmission performance, the dielectric constant ε is controlled to around 1.5, and the working capacitance C to be 73–75 pF.

[0027] After the insulation layer is processed, it needs to be cured three times at an environment of -40℃ to 130℃, each time for 4 hours, with the temperature increasing successively (existing technology). This ensures that the insulation layer covering the conductor is cured relatively uniformly, thereby achieving the goal of improving the stability of the cable's transmission performance and phase stability.

[0028] The inner shielding layer is a silver-plated copper tape armor layer, wherein the copper tape thickness is 0.06mm to 0.08mm, and the plating thickness is >2μm. The silver-plated copper tape armor layer adopts a wrapping structure to achieve an overlap rate of 40% to 50%, completely covering the cable core to protect the insulation layer from external mechanical damage. It also reduces the attenuation of the insulated core wire, prevents mechanical damage during bending, and ensures phase stability during vibration. The above structure achieves a good shielding effect.

[0029] The intermediate layer is a high-temperature resistant composite aluminum foil layer to enhance the cable's torsional resistance.

[0030] The outer shielding layer is a silver-plated copper wire braided layer: the silver-plated copper wires are 0.10mm to 0.12mm in size, the braiding density is greater than 95%, and it is attached to the aluminum surface of the intermediate layer to achieve a better shielding effect. The combined structure of inner shielding, intermediate layer, and outer shielding can effectively resist external electromagnetic interference, and the shielding attenuation value can be greater than 95dB.

[0031] The outer sheath is made of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, a soluble polytetrafluoroethylene material, and is processed using a thin-wall extrusion process. The outer sheath possesses advantages such as excellent temperature resistance, high dielectric strength, extremely low coefficient of friction, good mechanical properties, and good processability.

[0032] The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

Claims

1. A high-power, low-loss radio frequency cable for vehicle radar, characterized in that: It includes the cable core and, from the inside out, the inner shielding layer (5), the intermediate layer (6), the outer shielding layer (7), and the outer sheath. The cable core includes a conductor (1) and a first insulation layer (2), a second insulation layer (3), and a third insulation layer (4) that sequentially cover the conductor from the inside out.

2. The high-power, low-loss radio frequency cable for vehicle radar according to claim 1, characterized in that: The conductor is a stranded copper wire with a plating layer.

3. The high-power, low-loss radio frequency cable for vehicle radar according to claim 2, characterized in that: The first insulating layer is a PTFE raw material tape layer, the second insulating layer is a multi-layer LDPTFE tape layer, and the third insulating layer is a PTFE raw material tape layer; the total thickness of the first insulating layer, the second insulating layer, and the third insulating layer is 2.50mm to 2.65mm.

4. A high-power, low-loss radio frequency cable for vehicle radar according to claim 3, characterized in that: The inner shielding layer is a silver-plated copper strip armor layer.

5. A high-power, low-loss radio frequency cable for vehicle radar according to claim 4, characterized in that: The intermediate layer is a high-temperature resistant composite aluminum foil layer.

6. A high-power, low-loss radio frequency cable for vehicle radar according to claim 5, characterized in that: The outer shielding layer is a silver-plated copper wire braided layer.

7. A high-power, low-loss radio frequency cable for vehicle radar according to claim 6, characterized in that: The outer protective layer is a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material layer; the thickness of the outer protective layer is 0.50 mm to 0.60 mm.

8. A high-power, low-loss radio frequency cable for vehicle radar according to claim 7, characterized in that: The conductor plating thickness is >4μm; the silver-plated copper strip of the inner shielding layer has a thickness of 0.06mm to 0.08mm and a plating thickness of >2μm; the copper wire diameter of the outer shielding layer is 0.10mm to 0.12mm and the plating thickness is >1μm.

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