阅读说明：本技术 一种小型化5g基站用射频同轴电缆组件 (Miniaturized radio frequency coaxial cable assembly for 5G base station ) 是由 王乾 于 2020-12-11 设计创作，主要内容包括：本发明涉及同轴电缆技术领域,尤其涉及一种小型化5G基站用射频同轴电缆组件,包括：由内至外相互套接的内导体、绝缘层、外导体、屏蔽层和保护套,绝缘层包括设置在内导体外表面的发泡结构和发泡结构外表面的凸起结构,凸起结构与外导体之间形成空气槽,凸起结构的发泡度小于发泡结构的发泡度。本发明中,通过设置凸起结构,从而在凸起结构与外导体之间形成空气槽,有效的增加了内导体与外导体之间的空气占比,从而增加了信号的传输,减少了损耗,而将凸起结构的发泡度小于发泡结构的发泡度,使得凸起结构在电缆弯曲时,起到抗挤压的功能,减少电缆在弯曲时,内导体与外导体弯曲的部分截面变平,同轴性被破坏,减少了信号的损耗。(The invention relates to the technical field of coaxial cables, in particular to a miniaturized radio frequency coaxial cable assembly for a 5G base station, which comprises: the inner conductor, the insulating layer, the outer conductor, the shielding layer and the protective sleeve are sleeved from inside to outside, the insulating layer comprises a foaming structure arranged on the outer surface of the inner conductor and a protruding structure arranged on the outer surface of the foaming structure, an air groove is formed between the protruding structure and the outer conductor, and the foaming degree of the protruding structure is smaller than that of the foaming structure. According to the invention, the bulge structure is arranged, so that the air groove is formed between the bulge structure and the outer conductor, the air ratio between the inner conductor and the outer conductor is effectively increased, the signal transmission is increased, the loss is reduced, the foaming degree of the bulge structure is smaller than that of the foaming structure, the bulge structure has an anti-extrusion function when the cable is bent, the bending section of the inner conductor and the bending section of the outer conductor are flattened when the cable is bent, the coaxiality is damaged, and the signal loss is reduced.)

1. A miniaturized radio frequency coaxial cable assembly for a 5G base station, comprising:

the cable comprises an inner conductor (2), an insulating layer (3), an outer conductor (4), a shielding layer (5) and a protective sleeve (6), wherein the inner conductor, the insulating layer (3), the insulating layer and the protective sleeve are sleeved with each other from inside to outside, the insulating layer (3) comprises a foaming structure (31) arranged on the outer surface of the inner conductor (2) and a protruding structure (32) arranged on the outer surface of the foaming structure (31), an air groove is formed between the protruding structure (32) and the outer conductor (4), and the foaming degree of the protruding structure (32) is smaller than that of the foaming structure (31).

2. The miniaturized radio frequency coaxial cable assembly for 5G base station as claimed in claim 1, wherein the protrusion structure (32) is formed in a spiral shape, a wave shape or a grid shape around the outer surface of the foam structure (31).

3. The miniaturized radio frequency coaxial cable assembly for 5G base stations as claimed in claim 2, wherein an end of the protrusion structure (32) close to the foaming structure (31) is larger than an end far away from the foaming structure (31).

4. The radio frequency coaxial cable assembly for the miniaturized 5G base station as claimed in claim 3, wherein the cross section of the protrusion structure (32) comprises two compression-resistant ends and a compression-resistant groove (321) disposed between the two compression-resistant ends at an end away from the foam structure (31), the two compression-resistant ends and the compression-resistant groove (321) are of an arch structure, and the arch structure of the compression-resistant groove (321) is opposite to the arch structure of the two compression-resistant ends.

5. The radio frequency coaxial cable assembly for the miniaturized 5G base station as claimed in claim 1, wherein the shielding layer (5) comprises at least two braided layers, wherein the braided layers are filled with tin, and the braided layers are arranged in a staggered manner.

6. The miniaturized radio frequency coaxial cable assembly for 5G base stations as claimed in claim 5, wherein the braid has a braid angle α of 35 ° ± 5 °.

7. The radio frequency coaxial cable assembly for the miniaturized 5G base station according to claim 1, wherein a protective film (7) is arranged between the inner conductor (2) and the insulating layer (3), the outer conductor (4) and the shielding layer (5), and the protective film (7) is wound on the outer surfaces of the inner conductor (2) and the outer conductor (4).

8. The radio frequency coaxial cable assembly for the miniaturized 5G base station according to claim 7, wherein the protective film (7) is wound at equal intervals, and when the protective film (7) is wound, the protective film at least partially covers the previous section of the protective film (7).

9. The radio frequency coaxial cable assembly for the miniaturized 5G base station according to claim 1, wherein an elastic rod (1) is arranged in the middle of the inner conductor (2), the elastic rod (1) is arranged coaxially with the inner conductor (2), and the elastic rod (1) supports the inner conductor (2).

Technical Field

The invention relates to the technical field of coaxial cables, in particular to a miniaturized radio frequency coaxial cable assembly for a 5G base station.

Background

China is the manufacturing country and the demanding country of the largest radio frequency coaxial cable in the world, and in recent years, the rapid development of the China mobile communication industry greatly promotes the market demand for the radio frequency coaxial cable. Meanwhile, as the requirements of downstream industries on the quality of signal transmission are continuously improved, especially as the 5G technology is developed, the requirements of China on low loss of radio frequency coaxial cables are higher and higher.

The radio frequency coaxial cable generally comprises an inner conductor, an insulating layer, an outer conductor and a sheath, wherein the low loss is mainly determined by an ionization constant between the inner conductor and the outer conductor, the higher the air ratio in the insulating layer is, the better the foaming degree is, and the lower the loss of signals in the cable is. However, the higher the degree of foaming of the insulating layer, the poorer the supporting effect of the insulating layer on the cable, and when the cable is bent, the insulating layer is difficult to provide sufficient support, so that the surface of the cable is wrinkled when the cable is bent, the section of the bent portion is flattened, and the coaxiality of the inner conductor and the outer conductor is damaged, thereby causing signal loss.

In view of the above problems, the designer is actively researched and innovated based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products and in cooperation with the application of scholars, so as to create a cable label pasting device, which is more practical.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided is a miniaturized radio frequency coaxial cable assembly for a 5G base station, which realizes low loss transmission.

In order to achieve the purpose, the invention adopts the technical scheme that: a miniaturized radio frequency coaxial cable assembly for a 5G base station, comprising:

the insulation layer comprises a foaming structure arranged on the outer surface of the inner conductor and a protruding structure arranged on the outer surface of the foaming structure, an air groove is formed between the protruding structure and the outer conductor, and the foaming degree of the protruding structure is smaller than that of the foaming structure.

Further, the convex structure is wound into a spiral shape, a wave shape or a grid shape along the outer surface of the foaming structure.

Further, one end of the convex structure close to the foaming structure is larger than one end far away from the foaming structure.

Furthermore, protruding structure cross-section is keeping away from the one end of foam structure includes two resistance to compression ends and sets up two resistance to compression groove between the resistance to compression end, two resistance to compression end with resistance to compression groove is domes, resistance to compression groove domes and two resistance to compression end domes opposite direction.

Further, the shielding layer includes two at least weaving layers, two it is filled with tin between the weaving layer, two weaving layer dislocation set.

Further, the braiding angle α of the two braided layers is 35 ° ± 5 °.

Furthermore, the inner conductor and the insulating layer, the outer conductor and be provided with the protecting film between the shielding layer, the protecting film is around establishing the inner conductor with the outer conductor surface.

Furthermore, the protective film is wound at equal intervals, and when the protective film is wound, at least part of the protective film covers the previous section of the protective film.

Furthermore, an elastic rod is arranged in the middle of the inner conductor, the elastic rod and the inner conductor are coaxially arranged, and the elastic rod supports the inner conductor.

The invention has the beneficial effects that: according to the invention, the insulating layer is provided with the foaming structure and the protruding structure positioned on the outer surface of the foaming structure, so that an air groove is formed between the protruding structure and the outer conductor, the air occupation ratio between the inner conductor and the outer conductor is effectively increased, the signal transmission is increased, the loss is reduced, the foaming degree of the protruding structure is smaller than that of the foaming structure, the protruding structure has an anti-extrusion function when the cable is bent, the bending section of the inner conductor and the bending section of the outer conductor are flattened when the cable is bent, the coaxiality is damaged, and the signal loss is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the weave angles;

FIG. 4 is a schematic view of a protective film winding structure.

Reference numerals: 1. an elastic rod; 2. an inner conductor; 3. an insulating layer; 31. a foamed structure; 32. a raised structure; 321. a pressure resistant groove; 4. an outer conductor; 5. a shielding layer; 6. a protective sleeve; 7. and (4) a protective film.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1 to 4, a miniaturized radio frequency coaxial cable assembly for a 5G base station includes:

the inner conductor 2, the insulating layer 3, the outer conductor 4, the shielding layer 5 and the protective sleeve 6 are sleeved from inside to outside, the insulating layer 3 comprises a foaming structure 31 arranged on the outer surface of the inner conductor 2 and a protruding structure 32 arranged on the outer surface of the foaming structure 31, an air groove is formed between the protruding structure 32 and the outer conductor 4, and the foaming degree of the protruding structure 32 is smaller than that of the foaming structure 31.

Through setting up foaming structure 31 and the protruding structure 32 that is located the foaming structure 31 surface with insulating layer 3 to form the air groove between protruding structure 32 and outer conductor 4, the effectual air that increases between inner conductor 2 and the outer conductor 4 accounts for the ratio, thereby increased the transmission of signal, the loss is reduced, and the foaming degree that will bulge structure 32 is less than the foaming degree of foaming structure 31, make bulge structure 32 when the cable is crooked, play anti extrusion's function, it is crooked to reduce the cable, the partial cross-section that inner conductor 2 and outer conductor 4 crooked flattens, the axiality is destroyed, the loss of signal has been reduced.

Preferably, the convex structure 32 is formed in a spiral shape, a wave shape or a grid shape along the outer surface of the foaming structure 31.

Set up protruding structure 32 into spiral or wave or bars type along the surface of foam structure 31 winding, thereby set up protruding structure 32 equidistant at foam structure 31's surface, the air of effectual increase between inner conductor 2 and the outer conductor 4 accounts for than, and around setting up spiral or wave or bars type, support when can effectual increase protruding structure 32 is crooked to the cable, thereby when the cable is crooked to receive the extrusion, protruding structure 32 provides an anti extruded power, thereby protect inner conductor 2 and outer conductor 4, avoid bending angle too big, thereby the loss in the signal transmission process has been reduced, the practicality has been increased.

As a preference of the above embodiment, the end of the projection structure 32 close to the foam structure 31 is larger than the end far from the foam structure 31.

Through being greater than the one end of keeping away from foam structure 31 with the one end that bulge structure 32 is close to foam structure 31 to when bulge structure 32 received the extrusion, can effectually transmit power for foam structure 31, make foam structure 31 whole bear the extrusion with bulge structure 32 together, reduce deformation, protect inner conductor 2 and outer conductor 4, reduced the loss among the signal transmission process, increased practicality and reliability.

Preferably, the cross section of the protrusion 32 comprises two pressure-resisting ends and a pressure-resisting groove 321 arranged between the two pressure-resisting ends at the end far away from the foam structure 31, the two pressure-resisting ends and the pressure-resisting groove 321 are in an arch structure, and the arch structure of the pressure-resisting groove 321 is opposite to the arch structure of the two pressure-resisting ends.

Include two resistance to compression ends and set up the resistance to compression groove 321 between two resistance to compression ends through the one end of keeping away from foam structure 31 with protruding structure 32, two resistance to compression ends are domes with resistance to compression groove 321, the domes of resistance to compression groove 321 and the domes of even resistance to compression end opposite direction, thereby two resistance to compression ends are when receiving the extrusion, because for domes, can be better bear the extrusion force, and the domes of resistance to compression groove 321 receive the extrusion at protruding structure 32 when, can reduce foam structure 31's deformation, increase the support to the cable, thereby reduce the loss in the signal transmission process.

Preferably, the shielding layer 5 includes at least two braided layers, the two braided layers are filled with tin, and the two braided layers are arranged in a staggered manner.

By arranging at least two braided layers on the shielding layer 5, filling tin between the two braided layers, arranging the two braided layers in a staggered way, because the braided layer is in the process of braiding and tinning, because the braided wires of the braided layer have gaps, therefore, during the process of tin plating, uneven tin plating on the surface can be caused, phenomena such as plating leakage and the like are easy to generate, thereby causing poor shielding effect and causing phenomena such as electromagnetic signal emission leakage or interference, and the like, and in the process of miniaturization of the 5G base station, because the miniaturization of components easily causes interference of a communication system with coexisting multi-carrier signals, so at the miniaturized in-process of 5G basic station, it is especially important to electromagnetic signal's shielding effect, sets up two at least weaving layers with shielding layer 5, and two weaving layer dislocation set carry out the tin-plating again, can cover tin more level and more smooth, and difficult emergence leaks phenomenon such as plating, has guaranteed the shielding effect.

As a preference of the above embodiment, the braiding angle α of the two braided layers is 35 ° ± 5 °.

The knitting angle alpha of the knitting layer is set to 35 degrees +/-5 degrees, so that the tightness of the knitting line of the knitting layer in the knitting process can be guaranteed, the generation of gaps is reduced, the shielding effect is guaranteed, and the interference of signals is reduced.

As a preferred example of the above embodiment, a shielding film 7 is disposed between the inner conductor 2 and the insulating layer 3, and between the outer conductor 4 and the shielding layer 5, and the shielding film 7 is disposed around the outer surfaces of the inner conductor 2 and the outer conductor 4.

Through at inner conductor 2 and insulating layer 3, set up protecting film 7 between outer conductor 4 and shielding layer 5, protecting film 7 is around establishing at inner conductor 2 and outer conductor 4 surface to can effectual protection inner conductor 2 and outer conductor 4, increased the life of cable, increased practicality and reliability.

Preferably, the protective film 7 is wound at equal intervals, and when the protective film 7 is wound, the protective film 7 at least partially covers the previous protective film 7.

The protective film 7 is wound at equal intervals and at least partially covers the previous section of protective film 7, so that the processing is convenient and the protection effect is good.

In the above embodiment, the elastic rod 1 is preferably provided in the middle of the inner conductor 2, the elastic rod 1 is provided coaxially with the inner conductor 2, and the elastic rod 1 supports the inner conductor 2.

Through being provided with elastic rod 1 in the middle of inner conductor 2, elastic rod 1 and the coaxial setting of inner conductor 2, elastic rod 1 supports inner conductor 2, prevents to bend too much between inner conductor 2 and the outer conductor 4, and after the cable atress not, elastic rod 1 can reset the bending between inner conductor 2 and the outer conductor 4, guarantees the axiality between inner conductor 2 and the outer conductor 4, has reduced the loss of signal.

When the radio frequency coaxial cable is prepared, the following steps are adopted:

s10: extruding and molding an inner conductor outside the elastic rod, and winding a protective film outside the inner conductor;

s20: extruding a foaming structure outside the protective film through a foaming machine, wherein the foaming structure is a cylinder, extruding a convex structure outside the foaming structure after the foaming structure is formed, and rotatably extruding the convex structure in the extruding process so as to form a spiral shape; the extrusion can be rotated and then convoluted, so that the wave shape is formed; the extrusion can be carried out, and then the extrusion can be carried out back by rotating a certain angle, thereby forming a grid type; wherein, when extruding the foaming structure, nitrogen gas with pressure of 30-45 MPa is injected, and when extruding the convex structure, nitrogen gas with pressure of 10-25 MPa is injected;

s30: an outer conductor is sleeved outside the insulating layer, and a protective film is wound on the outer surface of the outer conductor;

s40: weaving a first woven layer on the outer surface of the protective film by using a copper wire by using a weaving machine, wherein the weaving angle is 35 +/-5 degrees; continuously weaving a second woven layer after weaving, arranging the first woven layer and the second woven layer in a staggered manner, and then carrying out tin plating on the woven layers through soldering flux and molten tin liquid;

s40: and finally extruding the integrally formed protective sleeve outside the woven layer.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.