CN112448110A - Cavity power divider applicable to 5G passive DAS system - Google Patents
Cavity power divider applicable to 5G passive DAS system Download PDFInfo
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- CN112448110A CN112448110A CN202011287966.XA CN202011287966A CN112448110A CN 112448110 A CN112448110 A CN 112448110A CN 202011287966 A CN202011287966 A CN 202011287966A CN 112448110 A CN112448110 A CN 112448110A
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- shell
- output end
- input end
- power divider
- contact pin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
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Abstract
The invention discloses a cavity power divider applicable to a 5G passive DAS (data acquisition System), which comprises a shell 1, wherein the shell is a hollow cylindrical cavity; an inner conductor 2, which is a coaxial metal conductor bar with stepped impedance transformation; and a radio frequency coaxial connector 3, wherein the connector is a standard N-F coaxial connector with 50 ohm impedance. The invention has the beneficial effects that: at present, the passive device of the existing network comprises a cavity power divider, the common working frequency of which is within 3GHz, and in order to deal with the 3.5GHz candidate frequency band of 5G, the invention adopts multi-stage Chebyshev multi-section impedance transformation to design a cavity two-power divider structure meeting the frequency coverage of 3.5GHz, so as to meet the coverage requirement of a future 5G passive DAS system.
Description
Technical Field
The invention relates to the field of communication, in particular to a cavity power divider applicable to a 5G passive DAS system.
Background
With the freezing of the 5G R15 standard, the worldwide deployment of 5G is increasingly accelerated, and the construction of 5G networks by domestic operators is gradually promoted. However, because the 5G frequency band is higher, the domestic candidate frequency bands are primarily divided into 3.5G, 4.8G and the like, and countries such as Europe and America also develop a lot of research and tests in the field of 5G millimeter waves. But since 5G is significantly increased over 4G in frequency, resulting in higher penetration loss than 4G, resulting in further limitation of outdoor macro-station indoor coverage solutions, research on indoor coverage solutions becomes increasingly urgent and important. In the 5G era, traditional indoor coverage solutions such as traditional passive indoor distribution systems have certain feasibility in the 3.5G frequency band, but cannot be implemented in the 4.8G and millimeter wave frequency bands basically. Because the common working frequency of the existing network passive device including a cavity power divider is within 3GHz, if a 5G candidate frequency band of 3.5GHz is considered, theoretical analysis shows that the indoor coverage requirement can be met by increasing PA transmitting power and other modes, but the existing network passive device is also in the stage of comparing and selecting the type of the technical layout and the coverage scheme in the industry at present. The invention considers that if a passive DAS scheme is adopted in 5G indoor coverage, a cavity power divider of 3.5G has certain market demand.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cavity power divider applicable to a 5G passive DAS system, which comprises a shell (1), an inner conductor (2), a radio frequency coaxial connector (3), an input end contact pin (4) and an output end contact pin (5); the shell (1) is a hollow cylinder, the inner conductor (2) is positioned in the shell (1), the input end of the inner conductor (2) is provided with a threaded hole (21), the output end of the inner conductor (2) is provided with a threaded through hole (22), the output end of the shell (1) is provided with two radial through holes (11), the input end of the shell (1) is provided with internal threads, the two through holes at the output end of the shell (1) are also provided with internal threads, radio frequency coaxial connectors (3) are respectively arranged at the input end of the shell (1) and the two through holes (11) at the output end of the shell, wherein an input end contact pin (4) is arranged in the radio frequency coaxial connector (3) at the input end of the shell (1), the input end contact pin (4) is connected with the internal threads at the input end of the shell, and the part of the input end contact pin (4) positioned in the cavity of the, an output end contact pin (5) is arranged in the radio frequency coaxial connector (3) at the output end of the shell (1), the output end contact pin (5) is respectively matched with the internal threads in the two through holes, and the part of the output end contact pin (5) located in the cavity of the shell (1) is matched and connected with the threaded through hole.
Preferably, the inner conductor (2) is formed by cascading six equivalent coaxial transmission lines, and the length of each segment is 1/4 wavelengths of the center frequency of the power divider.
Preferably, the output end contact pin (5) is coaxially arranged with the radio frequency coaxial connector (3) at the output end of the shell.
Preferably, the input end contact pin (4) is coaxially arranged with the radio frequency coaxial connector (3) at the input end of the shell (1).
The invention has the beneficial effects that: the shell and the inner conductor are machined and molded by an aluminum material machine, the size precision is high, the product is processed and tested by a sample piece, all indexes are excellent, the construction requirement of an 800 plus 3800MHz indoor coverage network is met, a plurality of existing network frequency ranges of 3G, 4G and 5G can be compatible, and the product universality is high. The inner conductor is formed by cascading six-stage equivalent coaxial transmission lines, and the length of each section is about 1/4 wavelengths of the center frequency of the power divider, so that the performance indexes of standing-wave ratio, three-order intermodulation and the like of the product are excellent, and the temperature performance and the reliability performance are high; the radio frequency coaxial connector, the input end contact pin and the output end contact pin are coaxially arranged, so that the mounting precision of the input end contact pin and the output end contact pin is ensured, and the connection reliability of the input end contact pin and the output end contact pin and the inner conductor is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the housing;
FIG. 4 is a schematic diagram of an inner conductor structure;
in the figure, 1-shell, 2-inner conductor, 3-radio frequency coaxial connector, 4-input pin and 5-output pin.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a cavity power divider applicable to a 5G passive DAS system includes a housing 1, an inner conductor 2, a radio frequency coaxial connector 3, an input pin 4, and an output pin 5; the shell 1 is a hollow cylinder, the inner conductor 2 is positioned in the shell 1, the input end of the inner conductor 2 is provided with a threaded hole 21, the output end of the inner conductor 2 is provided with a threaded through hole 22, the output end of the shell 1 is provided with two radial through holes 11, the input end of the shell 1 is provided with an internal thread, the two through holes at the output end of the shell 1 are also provided with internal threads, radio frequency coaxial connectors 3 are respectively arranged at the two through holes 11 at the input end and the output end of the shell 1, wherein an input pin 4 is arranged in the radio frequency coaxial connector 3 at the input end of the shell 1, the input pin 4 is connected with the internal thread at the input end of the shell, the part of the input pin 4 positioned in the cavity of the shell 1 is matched with the threaded hole of the inner conductor, an output pin 5 is arranged in the radio frequency coaxial connector 3 at the output end of the shell 1, and the part of the output end pin 5 positioned in the cavity of the shell 1 is matched and connected with the threaded through hole.
The inner conductor 2 is formed by cascading six-stage equivalent coaxial transmission lines, and the length of each section is 1/4 wavelengths of the center frequency of the power divider.
And the output end contact pin 5 is coaxially arranged with the radio frequency coaxial connector 3 at the output end of the shell.
The input end contact pin 4 is coaxially arranged with the radio frequency coaxial connector 3 at the input end of the shell 1.
Specifically, as shown in fig. 1 and fig. 2, a cavity power divider applicable to a 5G passive DAS system includes a housing 1, an inner conductor 2, and a radio frequency coaxial connector 3, where the housing 1 is a hollow cylinder, the inner conductor 2 is located inside the housing 1, as shown in fig. 4, an input end of the inner conductor 2 is provided with a threaded hole 21, an output end of the inner conductor is provided with a threaded through hole 22, as shown in fig. 3, an output end of the housing 1 is provided with two radial through holes 11, an input end of the housing 1 is provided with an internal thread, two through holes 11 at an output end of the housing 1 are also provided with an internal thread, radio frequency coaxial connectors 3 are respectively disposed at the input end and the output end of the housing 1, where an input pin 4 is disposed in the radio frequency coaxial connector 3 at the input end of the housing 1, in this embodiment, the output pin 5 is disposed coaxially with the radio frequency coaxial connector 3 at the output end of the housing 1, in the embodiment, the product is processed and tested by a sample piece, each index is good, the requirement of building an 800 plus material 3800MHz5G indoor coverage network is met, the product can be compatible with a plurality of existing network frequency ranges of 3G, 4G and 5G, and the product universality is strong. The inner conductor is formed by cascading six-stage equivalent coaxial transmission lines, and the length of each section is about 1/4 wavelengths of the center frequency of the power divider, so that the performance indexes of standing-wave ratio, three-order intermodulation and the like of the product are excellent, and the temperature performance and the reliability performance are high; the radio frequency coaxial connector, the input end contact pin and the output end contact pin are coaxially arranged, so that the mounting precision of the input end contact pin and the output end contact pin is ensured, and the connection reliability of the input end contact pin and the output end contact pin and the inner conductor is ensured.
In this embodiment, the inner conductor 2 is formed by cascading six equivalent coaxial transmission lines by using an 1/4 wavelength impedance transformation principle, and the length of each segment is about 1/4 wavelengths of the center frequency of the power divider.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A cavity power divider applicable to a 5G passive DAS system is characterized by comprising a shell (1), an inner conductor (2), a radio frequency coaxial connector (3), an input end pin (4) and an output end pin (5); the shell (1) is a hollow cylinder, the inner conductor (2) is positioned in the shell (1), the input end of the inner conductor (2) is provided with a threaded hole (21), the output end of the inner conductor (2) is provided with a threaded through hole (22), the output end of the shell (1) is provided with two radial through holes (11), the input end of the shell (1) is provided with internal threads, the two through holes at the output end of the shell (1) are also provided with internal threads, radio frequency coaxial connectors (3) are respectively arranged at the input end of the shell (1) and the two through holes (11) at the output end of the shell, wherein an input end contact pin (4) is arranged in the radio frequency coaxial connector (3) at the input end of the shell (1), the input end contact pin (4) is connected with the internal threads at the input end of the shell, and the part of the input end contact pin (4) positioned in the cavity of the, an output end contact pin (5) is arranged in the radio frequency coaxial connector (3) at the output end of the shell (1), the output end contact pin (5) is respectively matched with the internal threads in the two through holes, and the part of the output end contact pin (5) located in the cavity of the shell (1) is matched and connected with the threaded through hole.
2. The cavity power divider applicable to a 5G passive DAS system according to claim 1, wherein: the inner conductor (2) is formed by cascading six-stage equivalent coaxial transmission lines, and the length of each section is 1/4 wavelengths of the center frequency of the power divider.
3. The cavity power divider applicable to a 5G passive DAS system according to claim 1, wherein: the output end contact pin (5) is coaxially arranged with the radio frequency coaxial connector (3) at the output end of the shell.
4. The cavity power divider applicable to a 5G passive DAS system according to claim 1, wherein: the input end contact pin (4) is coaxially arranged with the radio frequency coaxial connector (3) at the input end of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287966.XA CN112448110A (en) | 2020-11-17 | 2020-11-17 | Cavity power divider applicable to 5G passive DAS system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287966.XA CN112448110A (en) | 2020-11-17 | 2020-11-17 | Cavity power divider applicable to 5G passive DAS system |
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| CN112448110A true CN112448110A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011287966.XA Pending CN112448110A (en) | 2020-11-17 | 2020-11-17 | Cavity power divider applicable to 5G passive DAS system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378838A1 (en) * | 1989-01-14 | 1990-07-25 | Deutsche Aerospace AG | Method for the reduction of backscattering electromagnetic radiation at cavity structures open at one side |
| CN103996896A (en) * | 2014-05-16 | 2014-08-20 | 深圳国人通信股份有限公司 | Power divider |
| CN204407463U (en) * | 2015-03-27 | 2015-06-17 | 四川天邑康和通信股份有限公司 | A kind of novel LTE die casting power splitter |
| US20160141742A1 (en) * | 2014-11-17 | 2016-05-19 | City University Of Hong Kong | N-way coaxial waveguide power divider/combiner |
-
2020
- 2020-11-17 CN CN202011287966.XA patent/CN112448110A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378838A1 (en) * | 1989-01-14 | 1990-07-25 | Deutsche Aerospace AG | Method for the reduction of backscattering electromagnetic radiation at cavity structures open at one side |
| CN103996896A (en) * | 2014-05-16 | 2014-08-20 | 深圳国人通信股份有限公司 | Power divider |
| US20160141742A1 (en) * | 2014-11-17 | 2016-05-19 | City University Of Hong Kong | N-way coaxial waveguide power divider/combiner |
| CN204407463U (en) * | 2015-03-27 | 2015-06-17 | 四川天邑康和通信股份有限公司 | A kind of novel LTE die casting power splitter |
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Application publication date: 20210305 |
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