CN209949102U - Low-intermodulation multi-system combiner - Google Patents
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Abstract
The utility model discloses a low intermodulation multi-system combiner, divide module and a plurality of second grade combiner including signal attenuation module, a plurality of one-level combiners, merit, the signal attenuation module includes a plurality of attenuators, each the input of attenuator is used for connecting outside first type network signal, each the output of attenuator respectively with correspond the input electricity of one-level combiner is connected. The utility model discloses a set up the signal attenuation module and by the one-level combiner, the POI system that module and second-stage combiner are divided to the merit for the network signal of each input is earlier through the attenuation of signal attenuation module, through the POI system way of combining, can reduce the power of assembling of combining by a wide margin, assemble the power and reduce 1dB at every turn, reflect three-order intermodulation and reach the base transceiver station and just reduce 3dB, consequently can reduce intermodulation interference by a wide margin, thereby make this multi-system combiner device both can realize that the MIMO function does not have the interference of going upward simultaneously.
Description
Technical Field
The utility model relates to a mobile communication network multisystem combiner field especially relates to a multisystem combiner device of low intermodulation.
Background
With the development of mobile communication, the used systems and frequency bands are increasing continuously, and co-construction sharing is gradually becoming the industry trend, but as more high frequency bands and more carriers are used, the total power after combining is also increasing continuously, so that the intermodulation interference is more and more serious. When a two-way distribution system is adopted, the MIMO function is realized, the system performance must be greatly reduced due to a large amount of uplink intermodulation interference, and the user perception is influenced. The MIMO function can be well realized by adopting a three-path system or a four-path system, but the construction cost is greatly increased, the property coordination difficulty is increased, and the combiner performance of the multi-system is more and more unsatisfied by an operator.
The existing dual-cable multi-system combiner platform mainly has two types, the first type is FDD system receiving and transmitting separation, and intermodulation signals generated by the separation of the uplink and the downlink cannot interfere the uplink of the FDD system; the second uplink and downlink are not separated and directly combined for coverage, although the MIMO function is realized, when the number of combined systems is large and the power is high, the intermodulation signal interferes with the uplink of all the systems. Therefore, both of these two methods have disadvantages, and the first method cannot realize MIMO function although there is no interference in FDD system; the second method can realize MIMO function, but all systems have a lot of uplink interference, so that it cannot achieve the optimal multipath combining state.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide a not having the low intermodulation multi-system combiner of going upward the interference simultaneously of MIMO function both.
The purpose of the utility model is realized through the following technical scheme:
a low intermodulation, multi-system combiner arrangement, comprising: the signal attenuation module comprises a plurality of attenuators, the input end of each attenuator is used for connecting an external first-class network signal, and the output end of each attenuator is electrically connected with the input end of the corresponding first-class combiner;
the power dividing module comprises a first power dividing assembly, a second power dividing assembly, a third power dividing assembly and a fourth power dividing assembly, wherein the input ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the output end of the corresponding first-stage combiner, the input ends of the second power dividing assembly and the third power dividing assembly are respectively and electrically connected with an external second-class network signal, and the output ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the input end of the corresponding second-stage combiner.
In one embodiment, the signal attenuation module includes nine attenuators, an input end of each attenuator is used for accessing a first-class network signal, and an output end of each attenuator is electrically connected to an input end of the corresponding first-class combiner.
In one embodiment, the attenuator is an adjustable attenuator.
In one embodiment, the multi-system combiner includes three first-stage combiners, an input terminal of each first-stage combiner is electrically connected to an output terminal of the corresponding attenuator, and an output terminal of each first-stage combiner is electrically connected to an input terminal of the corresponding power dividing module.
In one embodiment, each of the first-stage combiners includes a first combination output terminal and two first-stage combination input terminals, each of the first-stage combination input terminals is electrically connected to the output terminal of the corresponding signal attenuation module, and the first combination output terminals are electrically connected to the input terminals of the corresponding power dividing modules, respectively.
In one embodiment, the multi-system combiner device includes four secondary combiners, each secondary combiner includes a secondary combiner output end and a plurality of network combiner ends, each network combiner end is electrically connected to the output end of the corresponding power splitting module, and the secondary combiner output ends are respectively used for connecting external uplink cables and/or external downlink cables.
In one embodiment, the two-stage combiner is a four-frequency combiner, and input ends of the four-frequency combiner are electrically connected to output ends of the corresponding power dividing modules respectively.
In one embodiment, the first power dividing assembly includes a four power divider, an input terminal of the four power divider is electrically connected to an output terminal of the first-stage combiner, and an output terminal of the four power divider is electrically connected to an input terminal of the second-stage combiner.
In one embodiment, the second power dividing element includes a first bridge and two first diplexers, two input ends of the first bridge are respectively used for connecting an external first-class network signal and an external second-class network signal, two output ends of the first bridge are respectively electrically connected with input ends of the two first diplexers, and output ends of the two first diplexers are respectively electrically connected with inputs of the two second-stage combiners.
In one embodiment, the third power dividing assembly includes a second bridge and two second power dividers, two input ends of the second bridge are respectively used for connecting an external first-type network signal and an external second-type network signal, two output ends of the second bridge are respectively electrically connected to input ends of the two second power dividers, and output ends of the two second power dividers are respectively electrically connected to inputs of the second-stage combiner.
The utility model discloses compare in prior art's advantage and beneficial effect as follows:
1. the utility model relates to a low intermodulation multi-system combiner device, through setting up the signal attenuation module and by one-level combiner, the POI system that module and second grade combiner are constituteed is divided to the merit, make the network signal of each input earlier through the attenuation of signal attenuation module, carry out the combiner through the POI system again, can reduce by a wide margin the power of assembling of combiner, assemble the power and reduce 1dB at every turn, reflect three-order intermodulation and reach the basic station receiver and just reduce 3dB, consequently can reduce intermodulation interference by a wide margin, thereby make this multi-system combiner device both can realize that the MIMO function does not have the interference of going upward simultaneously.
2. The utility model discloses a multi-system combiner device has solved traditional receiving and dispatching and has not separated the passive intermodulation interference problem that the POI platform can't be solved, can realize the MIMO function through two way antenna feeder systems or distribution system, has not only promoted the performance of mobile communication multi-system combiner and has reduced the engineering construction cost.
3. The utility model discloses a multisystem combiner device, all system power except that the combination has some losses when the combination, and on all powers all transmitted the distribution system, there was not artificial meaningless loss to make the loss when having reduced signal transmission.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a low intermodulation multi-system combiner according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a low intermodulation multi-system combiner device according to another embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A low intermodulation, multi-system combiner arrangement, comprising: the signal attenuation module comprises a plurality of attenuators, the input end of each attenuator is used for connecting an external first-class network signal, and the output end of each attenuator is electrically connected with the input end of the corresponding first-class combiner; the power dividing module comprises a first power dividing assembly, a second power dividing assembly, a third power dividing assembly and a fourth power dividing assembly, wherein the input ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the output end of the corresponding first-stage combiner, the input ends of the second power dividing assembly and the third power dividing assembly are respectively and electrically connected with an external second-class network signal, and the output ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the input end of the corresponding second-stage combiner. So, through setting up signal attenuation module and by the POI system that one-level combiner, merit divide module and second combiner are constituteed for each network signal of inputing is earlier through the attenuation of signal attenuation module, and the POI system carries out the combiner again, can reduce the power of assembling by a wide margin, and the power of assembling is every reduced 1dB, and reflection third-order intermodulation reaches the base station receiver and just reduces 3dB, consequently can reduce intermodulation interference by a wide margin, thereby make this multi-system combiner both can realize that the MIMO function does not have the uplink interference simultaneously.
In one embodiment, the signal attenuation module includes nine attenuators, an input end of each attenuator is used for accessing a first type network signal, and an output end of each attenuator is electrically connected to an input end of the corresponding first-stage combiner.
In one embodiment, the attenuator is an adjustable attenuator.
In one embodiment, the multi-system combiner includes three first-stage combiners, an input terminal of each first-stage combiner is electrically connected to an output terminal of the corresponding attenuator, and an output terminal of each first-stage combiner is electrically connected to an input terminal of the corresponding power dividing module.
In one embodiment, each of the first-stage combiners includes a first combination output terminal and two first-stage combination input terminals, each of the first-stage combination input terminals is electrically connected to the output terminal of the corresponding signal attenuation module, and the first combination output terminals are electrically connected to the input terminals of the corresponding power dividing modules, respectively.
In an embodiment, the multi-system combiner includes four second-stage combiners, each second-stage combiner includes a second-stage combiner output end and a plurality of network combining path ends, each network combining path end is electrically connected to the output end of the corresponding power dividing module, and the second-stage combiner output ends are respectively used for connecting an external uplink cable and/or a downlink cable.
In an embodiment, the second-stage combiner is a four-frequency combiner, and input ends of the four-frequency combiner are electrically connected to output ends of the corresponding power dividing modules, respectively.
In an embodiment, the first power dividing assembly includes a four power divider, an input terminal of the four power divider is electrically connected to an output terminal of the first-stage combiner, and an output terminal of the four power divider is electrically connected to an input terminal of the second-stage combiner.
In an embodiment, the second power dividing assembly includes a first bridge and two first two power dividers, two input ends of the first bridge are respectively used for connecting an external first-class network signal and an external second-class network signal, two output ends of the first bridge are respectively electrically connected to input ends of the two first two power dividers, and output ends of the two first two power dividers are respectively electrically connected to inputs of the two second-stage combiners.
In an embodiment, the third power divider component includes a second bridge and two second power dividers, two input ends of the second bridge are respectively used for connecting an external first-type network signal and an external second-type network signal, two output ends of the second bridge are respectively electrically connected to input ends of the two second power dividers, and output ends of the two second power dividers are respectively electrically connected to an input of the second-stage combiner.
It should be noted that the present invention relates to a method for signal transmission or signal processing, which belongs to the prior art that can be known to those skilled in the art. The utility model discloses only require protection each components and parts accord with the concrete connection relation of utility model protection object in the low multisystem combiner device of intermodulation.
To further understand the technical concept of the low intermodulation multi-system combiner, the low intermodulation multi-system combiner will be further described. In order to meet the requirement of a mobile communication multi-system combiner and solve the problem of high intermodulation interference existing in the current mobile communication multi-system combiner, the application needs to provide a double-cable low intermodulation POI platform which can realize the MIMO function and has no uplink interference.
In an embodiment, please refer to fig. 1, a low intermodulation multi-system combiner includes: the signal attenuation module 100, the N first-stage combiners 200, the power division module 300, and the N second-stage combiners 400 are integers greater than 1, where N is determined according to a coverage capability of a network signal to be accessed, that is, a person skilled in the art may flexibly select the number of N according to an actual situation. It should be noted that the signal attenuation module 100 is configured to attenuate an input signal; the first-stage combiner 200 is configured to combine the network signals of each system and output the combined network signals to the power division module; the power dividing module 300 is configured to divide one input signal energy into two or more paths for output; the secondary combiner 400 is configured to combine the network signals output by the power dividing modules 300 and output the combined network signals to an external network system, where the network system is an antenna feeder system or a distribution system.
Referring to fig. 1, the signal attenuation module 100 includes a plurality of signal input terminals and a plurality of signal output terminals, each of the signal input terminals is used for accessing a network signal of a first type of standard, and each of the signal output terminals is used for outputting the network signal of the first type of network signal attenuated by the signal attenuation module. Therefore, by arranging a plurality of signal input ends and signal output ends, the network signals of the system can be effectively connected. And through setting up the signal attenuation module, make each network signal of input pass through the attenuation of signal attenuation module earlier, pass through POI system and combine, can reduce the convergent power of combining by a wide margin, every 1dB of convergent power reduction, reflect the third order intermodulation and arrive the base transceiver station and just reduce 3dB, consequently can reduce intermodulation interference by a wide margin.
It should be noted that, for example, referring to fig. 2, the first type of network signals include network signals sent by a telecommunication CDMA system, a mobile GSM system, a mobile DCS system, a telecommunication 1.8GL system, a mobile TD-F system, a universal WCDMA system and a mobile TD-E system. That is, each signal input terminal of the signal attenuation module 100 is connected to the signal system of each first type network signal. As another example, the second type of network signal includes network signals sent by a unicom 1.8GS system and a telecom 2.1GL system. The signal input of the signal attenuation module 100 is connected to the signal system of each second type network signal.
Referring to fig. 1, the first-stage combiner 200 includes a first-stage combined signal output end and a plurality of network signal input ends of different frequency bands, each of the network signal input ends is connected to a signal output end of a corresponding signal attenuation module, the first-stage combined signal output end outputs a first-stage combined signal obtained by combining a plurality of attenuated network signals by the first-stage combiner, and the first-stage combiners are configured to output a plurality of identical first-stage combined signals. It should be noted that the first-stage combining signal output end outputs a first-stage combining signal obtained by combining a plurality of attenuated network signals by the first-stage combiner, that is, the first-stage combining signal output end outputs a first-stage combining signal, and outputs a first-stage combining signal after passing each attenuated network signal through the combining function of the first-stage combiner 200. Therefore, the first-stage combiner 200 performs a combining operation on each network signal from the signal attenuation module, the signal after passing through the signal attenuation module is power-attenuated, and after combining again, the combined power is greatly reduced compared with the conventional method, so that mutual interference of the signals can be reduced.
Referring to fig. 1, the power dividing module 300 includes a plurality of first input terminals, a plurality of second input terminals, and a plurality of branch output terminals, each of the first input terminals is connected to a corresponding first-class combined signal output terminal, each of the second input terminals is used for accessing a network signal of a second type, and each of the branch output terminals is used for outputting a plurality of identical branch signals obtained by the power dividing module dividing the first-class combined signal and the second-class network signal. Therefore, by arranging the power dividing module, the network signals output by each primary combiner can be divided into the same number of branch signals.
It can be understood that, referring to fig. 2, the power dividing module 300 includes one or more of a first power dividing element 310, a second power dividing element 320, a third power dividing element 330 and a fourth power dividing element 340, signal input ends of the first power dividing element, the second power dividing element, the third power dividing element and the fourth power dividing element are respectively connected to the first-stage combiner, and signal output ends of the first power dividing element, the second power dividing element, the third power dividing element and the fourth power dividing element are respectively connected to the second-stage combiner; in this way, branching of the network of each input system can be realized. Of course, the method can be reasonably collocated according to the type of the access network signal and the channel condition of the equipment.
Specifically, the first power dividing assembly includes an input end and a plurality of output ends, the input end of the first power dividing assembly is connected to the first-stage combining signal output end of the first-stage combiner, the output end of each first power dividing assembly outputs a first power dividing network signal branched by the first power dividing assembly, and each first power dividing network signal is connected to the input end of the corresponding second-stage combiner. Thus, the first power dividing component can be used for dividing a single-channel network signal into multiple network signals.
The second power dividing assembly comprises two input ends and a plurality of output ends, the input end of one second power dividing assembly is connected with the first-stage combined signal output end of the corresponding first-stage combiner, the input end of the other second power dividing assembly is used for accessing network signals of a second type of system, the output end of each second power dividing assembly outputs a second power dividing network signal which is divided by the second power dividing assembly, and each second power dividing network signal is respectively connected with the input end of the corresponding second-stage combiner; therefore, by arranging the second power dividing component, the second power dividing component can firstly receive two or more different network signals and can also be used for dividing a single-channel network signal of the same frequency band into multiple network signals.
The third power dividing assembly comprises two input ends and a plurality of output ends, one input end of the third power dividing assembly is connected with the corresponding first-stage combined signal output end of the first-stage combiner, the other input end of the third power dividing assembly is used for accessing network signals of a second type of system, the output end of each third power dividing assembly outputs a third power dividing network signal which is divided by the third power dividing assembly, and each third power dividing network signal is respectively connected with the input end of the corresponding second-stage combiner. Therefore, by arranging the third power dividing component, the power dividing component can firstly receive two or more different network signals and can also be used for dividing the dual-channel network signals of the same frequency band into multiple network signals.
The fourth power dividing assembly comprises an input end and a plurality of output ends, the input end of the fourth power dividing assembly is connected with the first-stage combining signal output end of the first-stage combiner, the output end of each fourth power dividing assembly outputs a fourth power dividing network signal which is divided by the fourth power dividing assembly, and each fourth power dividing network signal is respectively connected with the input end of the corresponding second-stage combiner. Therefore, the fourth power division component can be used for dividing the network signals of the same frequency band system into multiple network signals, wherein some of the network signals are dual channels, and some of the network signals are single channels.
Therefore, by arranging the four power dividing assemblies, the network signals combined for the first time can be divided into the same number of branch signals through the power dividing units, and then are combined, so that uplink interference in the MIMO function is reduced, and the stability of network signal transmission is improved. And then can solve traditional receiving and dispatching and do not part the passive intermodulation interference problem that POI platform can't solve, can realize the MIMO function through two way antenna feedback systems or distribution system, not only promote the performance of mobile communication multi-system combiner and reduced the engineering construction cost.
Further, the first power dividing assembly includes a four power divider, an input end of the four power divider is connected to the first-stage combining signal output end of the first-stage combiner, four output ends of the four power divider output a first power dividing network signal divided by the four power divider, and the four first power dividing network signals are respectively and correspondingly connected to four input ends of the second-stage combiner. Therefore, the network signal of a single channel can be divided into four network signals, and then combined, so that the uplink signal interference is reduced.
The second power dividing component comprises a first electric bridge and two first power dividers, the first electric bridge comprises two input ends and two output ends, one input end of the first electric bridge is connected with the first-stage combined signal output end of the first-stage combiner, the other input end of the first bridge is used for accessing network signals of a second type of standard, one output end of the first bridge is connected with the input end of a first power divider, the other output end of the first bridge is connected with the input end of the other first two-way power divider, each first two-way power divider comprises two output ends, the four output ends of the two first two-way power dividers are correspondingly connected with the four input ends of the two-stage combiner respectively, and the four output ends of the two first two-way power dividers respectively and correspondingly output the network signals divided by the first electric bridge and the two first two-way power dividers to the four input ends of the two-way combiner. Therefore, by arranging the electric bridge, the dual-channel network signals of the same frequency band standard can be combined, and then the two-channel network signals are divided into four network signals by the two-power divider and then output to the second-stage combiner for combination, so that the effectiveness of receiving the network signals of the standard can be improved, the network signals are combined again, the compatibility of the network standard is improved, and the interference is reduced.
It should be further noted that the third power dividing assembly includes a second electrical bridge and two second power dividers, where the second electrical bridge includes two input ends and two output ends, one input end of the second electrical bridge is connected to the first-stage combining signal output end of the first-stage combiner, and the other input end of the second electrical bridge is used for accessing a network signal of a second system, for example, a network signal of a mobile TD-E system; one output end of the second electrical bridge is connected to an input end of one second power divider, the other output end of the second electrical bridge is connected to an input end of another second power divider, each second power divider includes two output ends, the two second power dividers include four output ends, the four output ends of the two second power dividers output a second power dividing network signal split by the second power dividing component, and each second power dividing network signal is connected to an input end of a corresponding second-stage combiner; namely, the four output ends of the two second power dividers are respectively and correspondingly connected with the four input ends of the second-stage combiner, and the four output ends of the two second power dividers respectively and correspondingly output the network signals divided by the second electric bridge and the two second power dividers to the four input ends of the second-stage combiner. Therefore, by arranging the electric bridge, one channel of the network signals of the standard can be combined, and then the four network signals are divided into two power dividers and then output to the second-stage combiner for combination, so that the effectiveness of receiving the network signals of the standard can be improved, and the combination is performed, and the interference is reduced.
The fourth power dividing component comprises a four power divider, the input end of the four power divider is connected with the first-stage combiner signal output end of the first-stage combiner, four output ends of the four power divider output a fourth power dividing network signal which is divided by the four power divider, and the four fourth power dividing network signals are respectively and correspondingly connected with four input ends of the second-stage combiner. Therefore, the network signals of a single channel or double channels can be divided into four network signals, and then combined, so that the uplink signal interference is reduced.
In this way, branching of the network of each input system can be realized. Of course, the method can be reasonably collocated according to the type of the access network signal and the channel condition of the equipment.
Referring to fig. 1, the second-stage combiner 400 includes a second-stage combining signal output end and a plurality of network signal combining ends, each of the network signal combining ends is connected to the branch output end of the corresponding power dividing module, the second-stage combining signal output end outputs a second-stage combining signal obtained by combining a plurality of branch signals by the second-stage combiner, the plurality of second-stage combiners output a plurality of identical second-stage combining signals, and each of the second-stage combining signals is respectively used for accessing an uplink signal cable and/or a downlink signal cable. Therefore, all system powers except for the loss of the combination are transmitted to the distribution system during the combination, and no artificial unnecessary loss exists, so that the loss during signal transmission is reduced.
It should be noted that the signal attenuation module includes a plurality of attenuators, an input end of each attenuator is used for accessing a network signal of a first type of system, and an output end of each attenuator is used for outputting the network signal of the first type of network signal attenuated by the signal attenuation module. In this embodiment, the attenuator is an adjustable attenuator. Therefore, the frequency modulation can be carried out according to the actual network signal requirement by arranging the adjustable attenuator.
It should be noted that the multi-system combiner device includes three first-stage combiners, each first-stage combiner includes a first combining output end and a plurality of first-stage signal combining ends, each first-stage signal combining end is connected to the signal output end of the corresponding signal attenuation module, the first combining output end outputs a first-stage combining signal obtained by combining a plurality of attenuated network signals by the first-stage combiner, and the three first-stage combiners output three same first-stage combining signals. Therefore, by arranging three first-stage combiners, the synthesis operation of the standard network signals can be realized, and the interference of the signals is further reduced.
It should be noted that each of the first-stage combiners includes a first combiner output end and two first-stage signal combiner ends, each of the first-stage signal combiner ends is connected to the signal output end of the corresponding signal attenuation module, and the first combiner output end outputs a first-stage combined signal obtained by combining a plurality of attenuated network signals by the first-stage combiner. Therefore, by arranging the two primary signal combining ends, network signals of the same system and frequency band can be combined.
It should be noted that the multi-system combiner device includes four secondary combiners, each of the secondary combiners includes a secondary combiner signal output end and a plurality of network signal combiner ends, each of the network signal combiner ends is connected to the corresponding branch output end of the power splitting module, the secondary combiner signal output end outputs a secondary combiner signal obtained by combining a plurality of branch signals by the secondary combiner, and the four secondary combiners output four identical secondary combiner signals. Therefore, the four second-stage combiners can receive the network signals of four systems and output four same network signals at the same time.
It should be noted that the multi-system combiner device includes four secondary combiners, where two secondary combiner signals combined by the secondary combiners are used for connecting with the uplink signal cable, and two other secondary combiner signals combined by the secondary combiners are used for connecting with the downlink signal cable. Thus, the four second-stage combiners are respectively connected with different network systems, such as an indoor separate system or an antenna feed system.
It should be noted that the second-stage combiner is a four-frequency combiner, and four signal input ends of the four-frequency combiner are respectively connected to the shunt output ends of the corresponding power dividing modules. Therefore, the cost of the device can be reduced by arranging the four-frequency combiner.
It can be understood that, in China, the wireless radio frequency signals of 9 mobile communication system base stations are attenuated by adjustable attenuators, the attenuation of each adjustable attenuator needs to be compared according to the actual link budget of each system, and the system attenuation is larger when the link budget is larger; the signals passing through the adjustable attenuator are combined for the first time through the first-stage combiner and the electric bridge; the signals after the first combination are divided into the same number of branch signals through the power divider. The shunt signals enter a second-stage combiner for combining, and enter a passive distribution system through an output port after being combined to complete coverage. Therefore, the adjustable attenuator, the first-stage combiner, the electric bridge, the power divider and the second-stage combiner are arranged. The high-power signals output by each base station are fed into the input interface, attenuated by the adjustable attenuator, pass through the first-stage combiner, the electric bridge, the power divider and the second-stage combiner, and finally output to the antenna feed system or the distribution system through the output interface to realize distributed coverage, so that the total power of the signals is controlled to be converged, the intensity of intermodulation interference signals is reduced, and the POI platform realizes the MIMO function through double cables. In addition, through methods of redundant power attenuation, base station power advanced distribution, same-frequency-band system pilot frequency combining and the like, the problem of passive intermodulation interference which cannot be solved by a traditional receiving and transmitting non-separated POI platform is solved, an MIMO function can be realized through two antenna feeder systems or distribution systems, the performance of the mobile communication multi-system combining is improved, the engineering construction cost is reduced, and the method has a wide market application prospect.
The utility model discloses compare in prior art's advantage and beneficial effect as follows:
1. the utility model relates to a low intermodulation multi-system combiner device, through setting up the signal attenuation module and by one-level combiner, the POI system that module and second grade combiner are constituteed is divided to the merit, make the network signal of each input earlier through the attenuation of signal attenuation module, carry out the combiner through the POI system again, can reduce by a wide margin the power of assembling of combiner, assemble the power and reduce 1dB at every turn, reflect three-order intermodulation and reach the basic station receiver and just reduce 3dB, consequently can reduce intermodulation interference by a wide margin, thereby make this multi-system combiner device both can realize that the MIMO function does not have the interference of going upward simultaneously.
2. The utility model discloses a multi-system combiner device has solved traditional receiving and dispatching and has not separated the passive intermodulation interference problem that the POI platform can't be solved, can realize the MIMO function through two way antenna feeder systems or distribution system, has not only promoted the performance of mobile communication multi-system combiner and has reduced the engineering construction cost.
3. The utility model discloses a multisystem combiner device, all system power except that the combination has some losses when the combination, and on all powers all transmitted the distribution system, there was not artificial meaningless loss to make the loss when having reduced signal transmission.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be 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. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A low intermodulation multi-system combiner apparatus, comprising: the signal attenuation module comprises a plurality of attenuators, the input end of each attenuator is used for connecting an external first-class network signal, and the output end of each attenuator is electrically connected with the input end of the corresponding first-class combiner;
the power dividing module comprises a first power dividing assembly, a second power dividing assembly, a third power dividing assembly and a fourth power dividing assembly, wherein the input ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the output end of the corresponding first-stage combiner, the input ends of the second power dividing assembly and the third power dividing assembly are respectively and electrically connected with an external second-class network signal, and the output ends of the first power dividing assembly, the second power dividing assembly, the third power dividing assembly and the fourth power dividing assembly are respectively and electrically connected with the input end of the corresponding second-stage combiner.
2. The low intermodulation multi-system combiner device according to claim 1, wherein the signal attenuation module comprises nine attenuators, an input end of each attenuator is used for accessing a first type of network signal, and an output end of each attenuator is electrically connected to an input end of the corresponding first-stage combiner.
3. The low intermodulation multi-system combiner of claim 2, wherein the attenuator is an adjustable attenuator.
4. The low intermodulation multi-system combiner device according to claim 1, wherein the multi-system combiner device comprises three first-stage combiners, an input terminal of each first-stage combiner is electrically connected to an output terminal of the corresponding attenuator, and an output terminal of each first-stage combiner is electrically connected to an input terminal of the corresponding power dividing module.
5. The low intermodulation multi-system combiner device according to claim 4, wherein each of the first-stage combiners includes a first combiner output and two first-stage combiner inputs, each of the first-stage combiner inputs is electrically connected to the output of the corresponding signal attenuation module, and the first combiner outputs are electrically connected to the inputs of the corresponding power division modules, respectively.
6. The low intermodulation multi-system combiner device according to claim 1, wherein the multi-system combiner device comprises four second-order combiners, each second-order combiner comprises a second-order combiner output terminal and a plurality of network combining line terminals, each network combining line terminal is electrically connected to the output terminal of the corresponding power dividing module, and the second-order combiner output terminals are respectively used for connecting external uplink cables and/or downlink cables.
7. The low-intermodulation multi-system combiner device according to claim 6, wherein the second-order combiner is a four-frequency combiner, and input ends of the four-frequency combiner are electrically connected to output ends of the corresponding power dividing modules, respectively.
8. The low intermodulation multi-system combiner of claim 1 wherein the first power divider component comprises a four power divider having inputs electrically connected to the outputs of the first-stage combiner and outputs electrically connected to the inputs of the second-stage combiner.
9. The low intermodulation multi-system combiner of claim 1, wherein the second power dividing component comprises a first bridge and two first two power dividers, two input terminals of the first bridge are respectively used for connecting external first-type network signals and second-type network signals, two output terminals of the first bridge are respectively electrically connected with input terminals of the two first two power dividers, and output terminals of the two first two power dividers are respectively electrically connected with input terminals of the second combiner.
10. The low intermodulation multi-system combiner of claim 1, wherein the third power divider component comprises a second bridge and two second power dividers, two input terminals of the second bridge are respectively used for connecting external first-type network signals and second-type network signals, two output terminals of the second bridge are respectively electrically connected with input terminals of the two second power dividers, and output terminals of the two second power dividers are respectively electrically connected with input terminals of the second combiner.
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| CN201921088349.XU CN209949102U (en) | 2019-07-11 | 2019-07-11 | Low-intermodulation multi-system combiner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324064A (en) * | 2019-07-11 | 2019-10-11 | 广东阿尔创通信技术股份有限公司 | The multisystem mixing device of low intermodulation |
| CN114567354A (en) * | 2020-11-27 | 2022-05-31 | 中国电信股份有限公司 | Method, device and computer readable storage medium for reducing multi-network intermodulation interference |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324064A (en) * | 2019-07-11 | 2019-10-11 | 广东阿尔创通信技术股份有限公司 | The multisystem mixing device of low intermodulation |
| CN110324064B (en) * | 2019-07-11 | 2024-05-14 | 广东阿尔创通信技术股份有限公司 | Low intermodulation multi-system combiner |
| CN114567354A (en) * | 2020-11-27 | 2022-05-31 | 中国电信股份有限公司 | Method, device and computer readable storage medium for reducing multi-network intermodulation interference |
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