CN210200931U - Equal-amplitude and same-phase radio frequency transmission line set - Google Patents
Equal-amplitude and same-phase radio frequency transmission line set Download PDFInfo
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- CN210200931U CN210200931U CN201921585624.9U CN201921585624U CN210200931U CN 210200931 U CN210200931 U CN 210200931U CN 201921585624 U CN201921585624 U CN 201921585624U CN 210200931 U CN210200931 U CN 210200931U
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Abstract
The utility model discloses a radio frequency transmission group of uniform amplitude cophase, including a plurality of roots set up side by side and the transmission line of tip parallel and level, adjacent two connect through the connecting strip between the transmission line, the connecting strip sets up along the length direction of transmission line, and the connector that is used for connecting the female head of SMA that the both ends of transmission line were equipped with, and the internal thread of connector is 0.8-0.9 with the length ratio of the external screw thread of the female head of SMA. The utility model has simple structure, can effectively reduce the loss, and ensures the symmetry, the amplitude balance and the phase consistency of signal transmission; and has multiple protection and high heat resistance, and greatly prolongs the service life of the composite material.
Description
Technical Field
The utility model relates to an electronic communication technical field, especially a radio frequency transmission group of uniform amplitude cophase.
Background
Radio frequency cables (radio frequency transmission lines) are mainly used for antenna feeders of radio transmitting or receiving equipment and for built-in connections or interconnection lines of various communication and electronic equipment. With the development of the fields of domestic communication, electronics and the like, the application of the radio frequency cable transmission system is in the fields of infinite communication, mobile communication, broadcast television, cable television, radar, navigation, remote control, remote sensing mapping and the like, the whole radio frequency cable industry develops rapidly in recent years, but 5G indoor coverage does not have an indoor coverage scheme with a high cost performance at present, an original indoor distribution system (DAS) cannot meet a 5G frequency band, and a small base station indoor distribution system proposed by an existing equipment manufacturer has the problems of price, safety, maintenance and the like, so that the application is limited, and the existing transmission line applied to 2T2R/4T4R is formed by respectively connecting a single transmission line with antennas at different positions of indoor distribution, the lengths of the transmission lines are inconsistent, and further the amplitude balance of signal transmission cannot be guaranteed. The indoor distribution system mainly comprises a signal source (base station) and an antenna feed system, and the radio frequency transmission line is an important component of the 5G indoor distribution system, so that the problems of high cost, high insertion loss, unbalanced amplitude, inconsistent phase and the like of the radio frequency transmission line are urgently needed to be solved.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model provides a radio frequency transmission group of uniform amplitude homophase can reduce the loss, guarantees signal transmission's symmetry, range equilibrium and phase uniformity, realizes low insertion loss, low cost, improves life.
The utility model adopts the technical proposal that:
the utility model provides a radio frequency transmission line group of uniform amplitude homophase, includes that a plurality of roots set up side by side and the transmission line of tip parallel and level, adjacent two connect through the connecting strip between the transmission line, the connecting strip is followed the length direction of transmission line sets up, the both ends of transmission line are equipped with the connector of connecting the female head of SMA respectively, the internal thread of connector and the length ratio of the external screw thread of the female head of SMA are 0.8-0.9.
The connecting strips are used for connecting the plurality of transmission lines, the tearing and pulling of the connecting strips can meet the transmission requirement of 2T2R/4T4R, the plurality of transmission lines can be guaranteed to be processed, cut and kept consistent in length in subsequent application at the same time, and compared with the prior art, the method is more convenient, and the symmetry, amplitude balance and phase consistency of signal transmission are guaranteed more effectively; the length ratio of the internal thread of the connector to the external thread of the SMA female head is 0.8-0.9, compared with the traditional connector, the length of the connector is increased, the connector is conveniently connected with the SMA female head, the structure is simple, the production cost is reduced, the difficulty of site construction is reduced, the requirements of 2T2R/4T4R on transmission uniformity and amplitude consistency are met, the cost is reduced by about 20%, and the stability and consistency are improved.
Further, the transmission line includes solid conductor, insulating layer, aluminium strip, weaving layer and the rubber layer that sets gradually from inside to outside.
Solid conductor overlaps respectively in proper order outward and is equipped with insulating layer, aluminium strip, weaving layer and rubber layer, carries out dual shielding interference signal through aluminium strip and weaving layer, reduces the microwave loss of transmission line, simultaneously, protects inside solid conductor, and outmost still is equipped with the rubber layer, promotes the protecting effect.
Further, a water blocking tape is arranged between the aluminum tape and the woven layer.
Set up the water blocking tape between aluminium strip and the weaving layer, improved the radial function and the resistant bending property that block water of transmission line greatly, reduced the emergence of water branch and electric branch, and then improved the life of transmission line.
Further, the connector with the tip of transmission line passes through the rubber sleeve and connects.
Connect through the rubber sleeve, convenient and fast.
Furthermore, the connecting strip is detachably connected with the transmission line.
According to different demands, the connection and the disassembly between a plurality of transmission lines are facilitated.
The utility model has the advantages that:
1. the transmission lines are connected through the connecting strips, so that the transmission lines can be processed and cut simultaneously, the transmission lines are kept consistent in length, the symmetry, amplitude balance and phase consistency of signal transmission are further guaranteed, the structure is simple, the production cost is reduced, the difficulty of field construction is reduced, the requirements of 2T2R/4T4R on transmission uniformity and amplitude consistency are met, the cost is reduced by about 20%, and the stability and consistency are improved;
2. interference signals are shielded doubly through the aluminum strips and the woven layers, microwave loss of the transmission line is reduced, meanwhile, the inner solid conductor is protected, and the outermost layer is further provided with the rubber layer, so that the protection effect is improved;
3. the water blocking tape is arranged between the aluminum tape and the woven layer, so that the radial water blocking function and the bending resistance of the transmission line are greatly improved, the occurrence of water branches and electric branches is reduced, and the service life of the transmission line is further prolonged;
4. the rubber sleeves are used for connection, so that convenience and rapidness are realized;
5. the connecting strip is detachably connected with the transmission lines, so that the connection and the detachment of a plurality of transmission lines can be facilitated according to different requirements;
6. the insulating layer is made of polyethylene, so that the insulating effect is good; the braided layer is made of copper-aluminum alloy with tin plated on the surface, the strength is high, the heat resistance is good, the protection effect is improved, and the microwave loss is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a transmission line of a radio frequency transmission line set with equal amplitude and same phase according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a transmission line of a radio frequency transmission line set with equal amplitude and same phase according to an embodiment of the present invention;
fig. 3 is a side view of a transmission line of a radio frequency transmission line set with equal amplitude and same phase according to an embodiment of the present invention;
fig. 4 is a top view of a radio frequency transmission line set with equal amplitude and same phase applied to 2T2R transmission according to an embodiment of the present invention;
fig. 5 is a top view of a radio frequency transmission line set with equal amplitude and same phase applied to 4T4R transmission according to an embodiment of the present invention;
fig. 6 is a top view of a connector of a radio frequency transmission line set with equal amplitude and same phase according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a distribution of RF transmission lines connected to antennas in the prior art;
fig. 8 is a binding usage state diagram of a radio frequency transmission line group with equal amplitude and same phase according to an embodiment of the present invention;
fig. 9 is a usage state diagram of the connection strip of the rf transmission line set with the same amplitude and phase according to the embodiment of the present invention.
Description of reference numerals:
1. a transmission line; 2. a connector; 3. a connecting strip; 4. a rubber sleeve; 1-1, a solid conductor; 1-2, an insulating layer; 1-3, aluminum strips; 1-4, water blocking tape; 1-5, weaving layer; 1-6 parts of rubber layer; 2-1, fixing parts; 2-2, connecting pieces; 5. a base station; 6. an antenna; 7. bundling the ropes; 8. a radio frequency power equalizer.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1-9, a radio frequency transmission group of uniform amplitude homophase, including a plurality of transmission lines 1 that set up side by side and tip parallel and level, adjacent two connect through connecting strip 3 between the transmission line 1, the accessible tears to pull connecting strip 3 and dismantles transmission line 1, connecting strip 3 is followed the length direction of transmission line 1 sets up, connecting strip 3 with transmission line 1 is isometric, the both ends of transmission line 1 are equipped with and are used for connecting the connector 2 of the female head of SMA, the internal thread of connector 2 is than being 0.8-0.9 with the length of the external screw thread of the female head of SMA.
The connector 2 comprises a fixing piece 2-1 and a connecting piece 2-2 which are both tubular, one end of the fixing piece 2-1 is rotatably connected with the transmission line 1, the other end of the fixing piece 2-1 is connected with the connecting piece 2-2, the inner wall of the connecting piece 2-2 is provided with an internal thread corresponding to the external thread of the SMA female head, and the external outline of the cross section of the fixing piece 2-1 is in a regular polygon shape, so that the operation and the screwing are convenient. The transmission lines 1 are connected through the connecting strips 3, the transmission lines are disassembled by tearing the connecting strips 3, the transmission requirements of 2T2R/4T4R are met, the multiple transmission lines 1 can be guaranteed to be processed and sheared simultaneously and the multiple transmission lines 1 can keep consistent in length in subsequent application, and further the symmetry, amplitude balance and phase consistency of signal transmission are guaranteed; the length ratio of the internal thread of the connector 2 to the external thread of the SMA female head is 0.8-0.9, compared with the traditional connector 2, the length of the connector 2 is increased, the connection with the SMA female head is convenient, the structure is simple, the production cost is reduced, the difficulty of site construction is reduced, the requirements of 2T2R/4T4R on transmission uniformity and amplitude consistency are met, the cost is reduced by about 20%, and the stability and consistency are improved.
In one embodiment, as shown in fig. 2, the transmission line 1 comprises a solid conductor 1-1, an insulating layer 1-2, an aluminum strip 1-3, a braided layer 1-5 and a rubber layer 1-6 which are arranged in sequence from inside to outside.
The solid conductor 1-1 is a solid copper-aluminum alloy conductor, and compared with a traditional copper core cable, the solid conductor has the advantages of excellent electrical performance, lighter weight, better flexibility, convenience and quickness in installation, saving of purchasing, installation and laying cost, great reduction of purchasing, installation and maintenance cost of a user and remarkable economic benefit; the solid conductor 1-1 is respectively sleeved with an insulating layer 1-2, an aluminum tape 1-3, a braided layer 1-5 and a rubber layer 1-6 in sequence, the insulating layer 1-2 is made of polyethylene and has a good insulating effect, and the braided layer 1-5 is made of copper-aluminum alloy with tin plated on the surface, so that the solid conductor has high strength, good heat resistance and a high protection effect. The double shielding interference signal is carried out through the aluminum strips 1-3 and the woven layers 1-5, the microwave loss of the transmission line 1 is reduced, meanwhile, the inner solid conductor 1-1 is protected, the rubber layers 1-6 are further arranged on the outermost layer, multiple protection is achieved, the transmission line has the advantages of being wear-resistant, high in strength, weather-resistant, ultraviolet-resistant, ageing-resistant and corrosion-resistant, the service life of the transmission line 1 is greatly prolonged, and the transmission line can be used in the environment with harsh natural environment, such as outdoor environment, strong wind gravel environment, mountain area environment, outdoor environment and underground environment for a long.
In one embodiment, as shown in fig. 2, a water-blocking tape 1-4 is arranged between the aluminum tape 1-3 and the woven layer 1-5.
The water blocking tape 1-4 is arranged between the aluminum tape 1-3 and the woven layer 1-5, so that the radial water blocking function and the bending resistance of the transmission line are greatly improved, the occurrence of water branches and electric branches is reduced, and the service life of the transmission line is further prolonged.
In one embodiment, as shown in fig. 1, the connector 2 is connected to the end of the transmission line 1 through a rubber sleeve 4.
The connector 2 is connected with the end part of the transmission line 1 through the rubber sleeve 4, the structure is simple, the connection is convenient, the installation efficiency is improved, and the production cost is reduced.
In one embodiment, the connection strip 3 is detachably connected to the transmission line 1.
Above-mentioned connecting strip 3 pastes together through hot pressing technique with transmission line 1, dismantles transmission line 1 through tearing connecting strip 3, satisfies multiple transmission demand, makes things convenient for the connection and the dismantlement between many transmission lines 1.
In one embodiment, as shown in fig. 7-8, when the existing transmission line is applied to 2T2R/4T4R, a single transmission line is respectively connected to antennas 6 at different positions distributed indoors, the lengths of the transmission lines are not the same, and thus the amplitude balance of signal transmission cannot be ensured, but in this embodiment, a plurality of independent transmission lines 1 are bound together by binding multiple transmission lines 1 through a binding rope 7, one end of each independent transmission line is connected to a base station 5, and the other end of each independent transmission line is connected to a radio frequency power equalizer 8 on each transmission node, so that the lengths of the transmission lines 1 on two adjacent nodes are the same, the paths of signal transmission are ensured to be the same, the amplitude balance and the phase of signal transmission are ensured to be the same, and the transmission efficiency is improved.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (5)
1. The utility model provides a radio frequency transmission line group of uniform amplitude homophase, its characterized in that includes that a plurality of roots set up side by side and the transmission line of tip parallel and level, adjacent two connect through the connecting strip between the transmission line, the connecting strip is followed the length direction of transmission line sets up, the both ends of transmission line are equipped with the connector of connecting the female head of SMA respectively, the internal thread of connector and the length ratio of the external screw thread of the female head of SMA are 0.8-0.9.
2. The set of radio frequency transmission lines of equal amplitude and in phase according to claim 1, wherein the transmission lines comprise a solid conductor, an insulating layer, an aluminum tape, a braid and a rubber layer arranged in sequence from inside to outside.
3. The set of radio frequency transmission lines of equal amplitude and in phase according to claim 2, wherein a water blocking tape is disposed between the aluminum tape and the woven layer.
4. The set of radio frequency transmission lines of equal amplitude and same phase as claimed in claim 1, wherein the connector is connected to the end of the transmission line by a rubber sleeve.
5. The set of radio frequency transmission lines of equal amplitude and same phase as claimed in claim 1, wherein the connection bar is detachably connected to the transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585624.9U CN210200931U (en) | 2019-09-23 | 2019-09-23 | Equal-amplitude and same-phase radio frequency transmission line set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585624.9U CN210200931U (en) | 2019-09-23 | 2019-09-23 | Equal-amplitude and same-phase radio frequency transmission line set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210200931U true CN210200931U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921585624.9U Active CN210200931U (en) | 2019-09-23 | 2019-09-23 | Equal-amplitude and same-phase radio frequency transmission line set |
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| CN (1) | CN210200931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904163A (en) * | 2021-01-22 | 2021-06-04 | 天津大学 | Electric tree detection characterization method based on microstrip transmission line |
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2019
- 2019-09-23 CN CN201921585624.9U patent/CN210200931U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904163A (en) * | 2021-01-22 | 2021-06-04 | 天津大学 | Electric tree detection characterization method based on microstrip transmission line |
| CN112904163B (en) * | 2021-01-22 | 2023-02-21 | 天津大学 | Electric tree detection characterization method based on microstrip transmission line |
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