CN211182525U - Antenna feeder system for underground wireless communication - Google Patents
Antenna feeder system for underground wireless communication Download PDFInfo
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- CN211182525U CN211182525U CN202020015055.0U CN202020015055U CN211182525U CN 211182525 U CN211182525 U CN 211182525U CN 202020015055 U CN202020015055 U CN 202020015055U CN 211182525 U CN211182525 U CN 211182525U
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- power divider
- wireless communication
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Abstract
The utility model discloses an antenna feeder system for wireless communication in pit, divide ware, one or multi-chamber coupler and a plurality of cycle logarithm antenna including a signal source, one or a plurality of cavity merit, the signal source divides the ware for the cavity merit with the signal transmission, the ware is divided to the cavity merit links to each other with cycle logarithm antenna and cavity coupler respectively, the ware is divided to the cavity merit and the cavity coupler passes through the feeder and links to each other, the cavity coupler links to each other with cycle logarithm antenna. The antenna feeder system mainly carries out remote pulling on radio signals through a feeder line, and carries out energy adjustment through the cavity power divider and the cavity coupler according to the distance covered by the antenna, so that the using quantity of communication base stations of the wireless communication system under the same mine roadway condition can be greatly saved, and no communication dead angle is achieved.
Description
Technical Field
The utility model relates to a wireless and explosion-proof field in the pit, especially a wireless communication is with antenna feeder system in the pit.
Background
The existing wireless communication system basically uses a dual directional antenna to lead out and simultaneously transmits wireless signals to the front and the back. And then the complex underground coal mine roadway with the frequent situations of steering, fluctuation, bifurcation and the like is realized, and meanwhile, a longer straight roadway is difficult to exist except a main transportation roadway and a working face. Most of signal energy transmitted by the wireless communication base station cannot be spread far due to the short tunnel, so that the signal energy is wasted, and only the number of the base stations can be increased according to the requirement of tunnel coverage. Therefore, how to overcome the problems of the trend change of the roadway and the incapability of turning of wireless signals is the key point to be solved by the application.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art not enough, provide an antenna feeder system for wireless communication in pit.
In order to realize the purpose, the following technical scheme is provided:
the antenna feed system for the underground wireless communication comprises a signal source, one or more cavity power dividers, one or more cavity couplers and a plurality of periodic logarithmic antennas, wherein the signal source transmits signals to the cavity power dividers, the cavity power dividers are respectively connected with the periodic logarithmic antennas and the cavity couplers, the cavity power dividers are connected with the cavity couplers through feeders, and the cavity couplers are connected with the periodic logarithmic antennas.
Preferably, the feeder is 1/2 copper tube shielded coaxial cable for remote pulling of wireless signals, and the length of the feeder is less than or equal to 200 m.
Preferably, the periodic logarithmic antenna directional gain is 9dbi, and the transmission frequency is 700-.
Preferably, the cavity power divider includes a cavity triple power divider and a cavity double power divider, the signal source is connected with the cavity triple power divider, the cavity triple power divider is respectively connected with the periodic logarithmic antenna, the cavity coupler and the cavity double power divider, the cavity double power divider is connected with the periodic logarithmic antenna, and the cavity coupler is opposite to the chamber and connected with the periodic logarithmic antenna.
Preferably, the cavity power divider is a cavity two power divider.
The utility model discloses beneficial effect does: the antenna feeder system mainly carries out remote pulling on radio signals through a feeder line, and carries out energy adjustment through the cavity power divider and the cavity coupler according to the distance covered by the antenna, so that the using quantity of communication base stations under the same roadway condition can be greatly saved, and no communication dead angle is achieved.
Drawings
FIG. 1 is a diagram of the antenna feed system of the present application in a U-shaped downhole environment;
FIG. 2 is a diagram of the antenna feed system of the present application when the downhole environment is a dogleg type;
FIG. 3 is a diagram comparing antenna feed systems when the downhole environment is U-shaped;
FIG. 4 is a diagram of a comparative antenna feed system when the downhole environment is a dogleg type;
FIG. 5 is a diagram of the antenna feed system of the present application in an underground environment of the H-type with a chamber;
FIG. 6 is a diagram of a comparative antenna feed system in an underground environment of H-type with chambers;
figure 7 is a diagram of the antenna feed system of the present application with two chambers.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
When the underground environment is in a U shape or a broken line shape:
as shown in fig. 1 and 2, the antenna feed system for underground wireless communication includes a signal source 10, a cavity power divider, a cavity two-power divider 20, a cavity coupler 30, and a plurality of periodic logarithmic antennas 40, where the signal source 10 generally uses a base station to transmit a signal to the cavity two-power divider 20, the cavity two-power divider 20 is respectively connected to the periodic logarithmic antennas 40 and the cavity coupler 30, the cavity two-power divider 20 is connected to the cavity coupler 30 through a feeder line, the cavity coupler 30 is connected to the periodic logarithmic antennas 40, and the cavity coupler 30 is connected to two sets of periodic logarithmic antennas 40 due to a U-shaped underground environment, so as to implement communication signals in two directions perpendicular to each other.
The feeder is 1/2 copper tube shielded coaxial cable, which is used for the remote extension of wireless signal, considering the frequency of the wireless communication system is 1700mzh-2500mhz, the attenuation of the feeder is generally 11dbm per hundred meters, and the length of the feeder is less than or equal to 200 m. The periodic logarithmic antenna directional gain is 9dbi, and the transmission frequency is 700-.
Comparative example 1
When the underground environment is in a U shape or a broken line shape:
as shown in fig. 3 and 4, 2 signal sources 10 are arranged in parallel, and a periodic logarithmic antenna 40 is connected to each signal source 10, so that a signal-free area a is formed, and the full coverage of communication cannot be realized.
Example two
When the underground environment is H-shaped with a chamber:
as shown in fig. 5, the antenna feed system for underground wireless communication includes a signal source 10, a cavity power divider, a cavity triple power divider 21, a cavity double power divider 20, a cavity coupler 30, and a plurality of periodic logarithmic antennas 40, where the signal source 10 generally uses a base station to transmit a signal to the cavity triple power divider 21, the cavity triple power divider 21 is respectively connected to the periodic logarithmic antennas 40, the cavity coupler 30, and the cavity double power divider 20, the cavity double power divider 20 is connected to the periodic logarithmic antennas 40, the cavity coupler 30 is located right opposite to the chamber 103 and connected to the two periodic logarithmic antennas 40 perpendicular to each other, and the cavity triple power divider 21 is connected to the cavity coupler 30 through a feeder line. Because the underground environment is the H type, including two parallel drifts first drift 101 and second drift 102, cavity three merit divides ware 21 and cavity two merit to divide ware 20 to set up respectively on two drifts.
And (3) power calculation: the signal source 10 releases power of 27dbm, the periodic logarithmic antenna 40 on the left side of the second tunnel 102 passes through the cavity triple power divider 21 (insertion loss is 5.3db) and then passes through the feeder line of 10 meters (line loss is 1.1db), and at the moment, the received power of the periodic logarithmic antenna 40 on the left side of the second tunnel 102 is 27-5.3-1.1-20.6 dbm. The right side line of the second tunnel 102 passes through the cavity triple power divider 21 (with 5.3db of insertion loss) and then passes through the 50-meter feeder line (with 5.5db of line loss), a 10db cavity coupler 30 is used in the middle for 0.5 of insertion loss, and the received power of the right side antenna of the second tunnel 102 is 27-5.3-5.5-0.5-14.6 dbm. The antenna on the right side of the first tunnel 101 passes through the three-cavity power divider 21 (with 5.3db of insertion loss) and then passes through the 50-meter feeder line (with 5.5db of line loss), and then passes through the two-cavity power divider 20 (with 3.3db of insertion loss), at this time, the received power of the antenna on the left side of the first tunnel 101 is 27-5.3-5.5-3.3 ═ 12.9dbm, and the left side of the right side is 12.9dbm in the same way.
In addition: when 2 chambers are included, as shown in fig. 7, the cavity two power divider 20 is also connected with a cavity coupler 30 in the first roadway 101, and the cavity coupler 30 is just opposite to the chambers in the same way and is connected with a periodic logarithmic antenna 40.
Based on the above principle, those skilled in the art can distribute a plurality of cavity couplers according to the number of the chambers.
Comparative example No. two
When the underground environment is H-shaped with a chamber:
as shown in fig. 6, 2 signal sources 10 are arranged in parallel, and a periodic logarithmic antenna 40 is connected to each signal source 10, so that a no-signal area B and a no-signal chamber area C are formed, and the full coverage of communication cannot be realized.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The antenna feed system for underground wireless communication is characterized by comprising a signal source, one or more cavity power dividers, one or more cavity couplers and a plurality of periodic logarithmic antennas, wherein the signal source transmits signals to the cavity power dividers, the cavity power dividers are respectively connected with the periodic logarithmic antennas and the cavity couplers, the cavity power dividers are connected with the cavity couplers through feeders, and the cavity couplers are connected with the periodic logarithmic antennas.
2. The antenna feeder system for downhole wireless communication according to claim 1, wherein the feeder is 1/2 copper tube shielded coaxial cable for remote pulling of wireless signals, and the length of the feeder is less than or equal to 200 m.
3. The antenna feed system for underground wireless communication as claimed in claim 1, wherein the periodic logarithmic antenna has a directional gain of 9dbi and a transmission frequency of 700-.
4. The antenna feed system for the underground wireless communication as claimed in any one of claims 1 to 3, wherein the cavity power divider comprises a cavity triple power divider and a cavity double power divider, the signal source is connected with the cavity triple power divider, the cavity triple power divider is respectively connected with the periodic logarithmic antenna, the cavity coupler and the cavity double power divider, the cavity double power divider is connected with the periodic logarithmic antenna, and the cavity coupler is positioned opposite to the chamber and connected with the periodic logarithmic antenna.
5. An antenna feed system for underground wireless communication according to any one of claims 1 to 3, wherein the cavity power divider is a cavity two power divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020015055.0U CN211182525U (en) | 2020-01-06 | 2020-01-06 | Antenna feeder system for underground wireless communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020015055.0U CN211182525U (en) | 2020-01-06 | 2020-01-06 | Antenna feeder system for underground wireless communication |
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| Publication Number | Publication Date |
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| CN211182525U true CN211182525U (en) | 2020-08-04 |
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| CN202020015055.0U Active CN211182525U (en) | 2020-01-06 | 2020-01-06 | Antenna feeder system for underground wireless communication |
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