CN219329139U

CN219329139U - Low-loss radio frequency coaxial cable

Info

Publication number: CN219329139U
Application number: CN202223518576.6U
Authority: CN
Inventors: 谢利君; 孙余良; 段祥森; 刘中华
Original assignee: Jiangsu Hengxin Technology Co Ltd
Current assignee: Jiangsu Hengxin Technology Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-07-11
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a low-loss radio frequency coaxial cable, which comprises an inner conductor, an insulating support frame, an outer conductor and a sheath, wherein the insulating support frame comprises a cylinder and a plurality of ribs, the cylinder is coated on the inner conductor, the inner wall of the cylinder is attached to the inner conductor, the ribs are uniformly distributed on the cylinder and extend along the length direction of the cylinder, a cavity is formed between every two adjacent ribs, the outer conductor is a spiral corrugated copper pipe and is coated on the ribs, and the sheath is coated on the spiral corrugated copper pipe. The low-loss radio frequency coaxial cable disclosed by the utility model is simple in structure, low in loss and good in high-temperature resistance and shielding performance.

Description

Low-loss radio frequency coaxial cable

Technical Field

The utility model belongs to the technical field of communication cables, and particularly relates to a low-loss radio frequency coaxial cable.

Background

In wireless communication, corrugated feeder products are commonly applied to base station coverage, room division coverage and other systems of mobile communication operators, wherein 1/2 or below of ultra-flexible cable components (jumpers) are mainly made by manufacturers, 1/2 or above of the ultra-flexible cable components are mainly transmission feeders in the coverage systems, a radio frequency coaxial cable consists of an inner conductor, an insulating layer, an outer conductor and a sheath, one cable serving as the jumpers is low in loss, the insulating layer adopts physical foaming and is mainly used for manufacturing the bunched jumpers of communication equipment, but the cable is poor in temperature resistance, the insulating layer is easily damaged in the joint welding process, and poor electrical connection performance is caused.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a low-loss radio frequency coaxial cable with low loss and high temperature resistance.

In order to solve the above technical problems, the present utility model provides a low-loss radio frequency coaxial cable, including:

the insulation support comprises a cylinder and a plurality of ribs, wherein the cylinder is coated on the inner conductor, the inner wall of the cylinder is attached to the inner conductor, the ribs are uniformly distributed on the cylinder and extend along the length direction of the cylinder, a cavity is formed between every two adjacent ribs, the outer conductor is a spiral corrugated copper pipe and is coated on the ribs, and the sheath is coated on the spiral corrugated copper pipe.

In one embodiment of the utility model, the outer diameter of the cylinder is 3mm-3.2mm.

In one embodiment of the utility model, the wall thickness of the spiral corrugated copper pipe ranges from 0.12mm to 0.2mm.

In one embodiment of the utility model, the ribs have an outer diameter in the range of 6.6mm to 7mm.

In one embodiment of the utility model, the ribs have a thickness of 0.4mm to 0.8mm.

In one embodiment of the utility model, the inner conductor is copper clad aluminum.

In one embodiment of the utility model, the diameter of the inner conductor is in the range of 2.56mm-2.65mm.

In one embodiment of the utility model, the number of ribs is at least four.

In one embodiment of the utility model, the diameter of the inner conductor is 2.6mm, the outer diameter of the ribs is 6.8mm, and the wall thickness of the spiral corrugated copper tube is 0.14mm.

In one embodiment of the utility model, the single bending radius of the spiral corrugated copper pipe is 30mm, and the multiple bending radius is 55mm.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the low-loss radio frequency coaxial cable disclosed by the utility model is simple in structure, low in loss and good in high-temperature resistance and shielding performance.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model, given by way of illustration only, together with the accompanying drawings.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which

Fig. 1 is a schematic diagram of a low-loss rf coaxial cable in accordance with a preferred embodiment of the present utility model;

fig. 2 is a radial cross-sectional view of a low loss rf coaxial cable in accordance with a preferred embodiment of the present utility model;

fig. 3 is a cross-sectional view of a low loss rf coaxial cable in accordance with a preferred embodiment of the present utility model.

Description of the specification reference numerals:

1. an inner conductor; 2. an insulating support; 21. a cylinder; 22. ribs; 3. an outer conductor; 4. and (3) a sheath.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

As shown in fig. 1-3, in order to obtain a low-loss radio-frequency coaxial cable according to the preferred embodiment of the utility model, the low-loss radio-frequency coaxial cable comprises an inner conductor 1, an insulating support frame 2, an outer conductor 3 and a sheath 4, wherein the insulating support frame 2 comprises a cylinder 21 and a plurality of ribs 22, the cylinder 21 is coated on the inner conductor 1, the inner wall is attached to the inner conductor 1, the ribs 22 are uniformly distributed on the cylinder 21 and extend along the length direction of the cylinder 21, a cavity is formed between two adjacent ribs 22, the outer conductor 3 is a spiral corrugated copper pipe and is coated on the ribs 22, and the sheath 4 is coated on the spiral corrugated copper pipe.

Alternatively, cylinder 21 has an outer diameter of 3mm to 3.2mm; the thickness of the pipe wall of the spiral corrugated copper pipe ranges from 0.12mm to 0.2mm; the outer diameter of the ribs 22 is in the range of 6.6mm-7mm; the thickness of the ribs 22 ranges from 0.4mm to 0.8mm.

Alternatively, the inner conductor 1 is copper clad aluminum or the like. Further, the diameter of the inner conductor 1 ranges from 2.56mm to 2.65mm.

The number of ribs 22 is at least four for effective support. Preferably, the number of ribs 22 is four or five, so that the insulation and structural strength can be ensured while the supporting function is provided.

In one embodiment, the insulating support frame 2 and the sheath 4 are made of crosslinked Polyethylene (PE) sheath materials, so that the temperature resistance of the radio frequency coaxial cable is improved, and the insulating support frame and the sheath are suitable for an electronic soldering process.

In the radio frequency coaxial cable in the embodiment, air is used as insulation, an insulation support frame 2 is adopted between the inner conductor 1 and the outer conductor 3, and the material is cross-linked PE material.

In one embodiment, the spiral corrugated copper pipe is continuously welded, has good flexibility and excellent shielding, and has a single bending radius of 30mm and multiple bending radii of 55mm.

The low-loss rf coaxial cable of the present utility model can be applied to connection of communication equipment, and in order to verify performance of the rf coaxial cable of the present utility model, in one embodiment, the inner conductor 1 is copper-clad aluminum, the diameter of the inner conductor 1 is 2.6mm, the outer diameter of the rib 22 is 6.8mm, and the wall thickness of the spiral corrugated copper tube is 0.14mm. The insulating support frame 2 and the sheath 4 are made of cross-linked PE materials. Performance testing was performed on the rf coaxial cable of this example, with the following results:

(1) The bending radius of the radio frequency coaxial cable can reach 30cm at least;

(2) The maximum tensile force can reach 700N;

(3) The working frequency range is 0MHz-10GHz;

(4) The characteristic impedance is 50Ω±1Ω;

(5) A 1000Mhz attenuation constant of not more than 0.14dB/m;

(6) Insulation resistance is larger than or equal to 10000MΩ & km;

(7) The direct current withstand voltage is 5000V and does not break down within one minute;

(8) Intermodulation is less than or equal to-158 dbc;

(9) The temperature can be kept at 250 ℃ within 5' time.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. A low-loss radio frequency coaxial cable comprising:

2. The low-loss radio frequency coaxial cable of claim 1, wherein the outer diameter of the cylinder is 3mm-3.2mm.

3. The low-loss radio frequency coaxial cable of claim 1, wherein the wall thickness of the spiral corrugated copper tube ranges from 0.12mm to 0.2mm.

4. The low-loss radio frequency coaxial cable of claim 1, wherein the ribs have an outer diameter in the range of 6.6mm-7mm.

5. The low-loss radio frequency coaxial cable of claim 1, wherein the ribs have a thickness in the range of 0.4mm to 0.8mm.

6. The low-loss radio frequency coaxial cable of claim 1, wherein the inner conductor is copper clad aluminum.

7. The low-loss radio frequency coaxial cable of claim 1, wherein the diameter of the inner conductor ranges from 2.56mm to 2.65mm.

8. The low-loss radio frequency coaxial cable of claim 1, wherein the number of ribs is at least four.

9. The low-loss rf coaxial cable of claim 1, wherein the diameter of the inner conductor is 2.6mm, the outer diameter of the ribs is 6.8mm, and the wall thickness of the spiral corrugated copper tube is 0.14mm.

10. The low loss radio frequency coaxial cable according to claim 1, wherein the single bend radius of the helically corrugated copper tube is 30mm and the multiple bend radius is 55mm.