Three-in two-out radio station combiner

Abstract

The utility model provides a three-in two-out radio station combiner, which comprises a combiner main body, a cover plate is arranged on the combiner main body, one end of the combiner main body is provided with two total output ports, and the other end of the combiner main body is provided with three total input ports. The three main input ports are connected with three filters in the combiner main body, output ends of two filters are connected with a duplexer, a synthesized signal of the duplexer is output to a first input end of a two-in two-out bridge, an output end of the other filter is connected with a second input end of the two-in two-out bridge, and the output end of the other filter is connected with a second input end of the two-in two-out bridge. Two output ports of the two-in two-out bridge are connected with the total output port; a path is formed by a two-in and two-out bridge connector duplexer and a filter in the frequency band of 300-1000 MHz, and three paths of signals are combined into two paths to be output, so that the function of a three-in and two-out combiner is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of microwave passive device especially relates to a three-input two-output radio combiner. BACKGROUND

[0002] The combiner is the combiner equipment that handles the downlink multichannel transmitting signal of multiple relay stations and combines into a way output. In the wireless communication system, the main function of the combiner is to combine two or more independent signals into a shared transmission path, which can effectively improve the spectrum utilization, reduce signal interference and realize multiple user communication at the same time.

[0003] The prior art patent with the publication number CN110828952A provides a combiner, which includes a cavity with a cavity and a public connector arranged at one end of the cavity, a first frequency resonant column, a second frequency resonant column, a third frequency resonant column and a coupling rod connected with the public connector are arranged on one side of the cavity close to the public connector, a metal sleeve coupled with the coupling rod is sleeved on the coupling rod, the first frequency resonant column is connected with the metal sleeve through a wire to transmit the first frequency band signal, the coupling hole for the coupling rod to insert and couple to realize the transmission of the second frequency band signal is arranged on the second frequency resonant column, and the third frequency resonant column is arranged on one side of the coupling rod and is coupled with the coupling rod to transmit the third frequency band signal. The coupling rod is arranged at the public connector to respectively perform bandwidth coupling distribution with the first frequency resonant column, the second frequency resonant column and the third frequency resonant column, so that the multi-frequency band signal integrated with the 5G frequency band is split / combined, compared with the port structure of the traditional combiner, the structure is simple, and the development of the 5G communication technology can be met. SUMMARY

[0004] In some special application occasions, a three-input two-output combiner is needed, but most of the combiners in the prior art are two-input two-output, so a three-input two-output radio combiner needs to be designed.

[0005] To solve the above technical problems, the technical scheme provided by the utility model is as follows: a three-input two-output radio combiner, which comprises a combiner main body, a cover plate is arranged on the combiner main body, two total output ports are arranged at one end of the combiner main body, and three total input ports are arranged at the other end of the combiner main body; the three total input ports are connected with three filters in the combiner main body, wherein two filter output ends are connected with a diplexer, the diplexer synthesizes a signal and outputs the signal to a first input end of a two-input two-output electric bridge, the other filter output end is connected with a second input end of the two-input two-output electric bridge, and two output ends of the two-input two-output electric bridge are connected with the total output ports. The two-input two-output electric bridge connector diplexer and filter in the 300-1000MHz frequency band are connected to form a channel, three signals are combined into two signals, and the function of the three-input two-output combiner is realized.

[0006] As a further improvement of the utility model, the two-in two-out bridge includes a bridge first input end and a bridge second input end, signals enter the bridge from the bridge first input end and the bridge second input end, and are output from the bridge first output end and the bridge second output end to a total output port; a 4.3-10 connector is further arranged on the two-in two-out bridge; and the two-in two-out bridge is fixed in the combiner main body through a polytetrafluoroethylene fixing structure.

[0007] As a further improvement of the utility model, the filter includes a first filter, a second filter and a third filter arranged side by side. The first filter includes a first resonant column group, a first total input port signal is input into the first resonant column group and then output to an inductive copper sheet, and the inductive copper sheet is connected to a duplexer first input end through an ohmic adapter. The second filter includes a second resonant column group, a second total input port signal is input into the first resonant column group and then output to a capacitive flybar, and the capacitive flybar is connected to a duplexer second input end. The third filter includes a third resonant column group, a third total input port is connected to the third resonant column group, an input tap copper sheet is arranged at the connection position and connected to an SMA connector on a cover plate; a third resonant column group output end is connected to a capacitive flybar, and the capacitive flybar is connected to a bridge second input end through an output tap copper sheet. Two-way signals of the first total input port and the second total input port are formed into a channel through HFSS and AWR simulation, two-way signal synthesis is realized, a 50-ohm adapter is connected to a bridge first input end, and two-way signals are output with the same amplitude.

[0008] As a further improvement of the utility model, the cover plate includes a bridge cover plate located above the two-in two-out bridge; the cover plate further includes a combiner cover plate located above the filter; and the cover plate further includes a shielding cover covering the bridge cover plate and the combiner cover plate. The filter, the duplexer and the two-in two-out bridge are fixed in the combiner main body through a polytetrafluoroethylene fixing structure. The polytetrafluoroethylene fixing structure and the shielding cover ensure stable signal transmission in the filter, the duplexer and the two-in two-out bridge, and transmission interference and interference between signals caused by metal fixing members are avoided.

[0009] The utility model discloses a two-in two-out bridge with a 3dB design, which can continuously divide a signal into two signals with the same amplitude and a 90° phase difference along the transmission line in a determined direction. The two-in two-out bridge is connected to a 400MHz duplexer and a filter through a 50-ohm adapter, and finally outputs three 400MHz filter signals with the same amplitude. The design method can realize miniaturization, low cost, high intermodulation, high isolation, high production and debugging qualification rate. The coaxial integrated design of the structure reduces the use of traditional cable connectors, and the performance and indicators are more stable. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the overall external structure diagram of the utility model.

[0011] Figure 2 It is the cover plate structure diagram of the utility model.

[0012] Figure 3 It is the internal structure diagram of the utility model.

[0013] In the drawing, 1 is combiner main body, 2 is cover plate, 3 is total output port, 4 is total input port, 5 is resonant column, 6 is two-in two-out bridge, 7 is combiner cover plate, 8 is bridge cover plate. DETAILED DESCRIPTION

[0014] Example one: a kind of three-in two-out radio combiner, including combiner main body 1, combiner main body 1 is equipped with cover plate 2, combiner main body 1 one end is equipped with two total output ports 3, the other end is equipped with three total input ports 4;Three total input ports 4 are connected with three filters inside combiner main body 1, wherein two filter output ends are connected with diplexer, and the signal output of diplexer is output to the first input end of two-in two-out bridge 6, another filter output end is connected with the second input end of two-in two-out bridge 6, and the two output ports of two-in two-out bridge 6 are connected with total output port 3.Through the two-in two-out bridge 6 connector of 300-1000MHz frequency band connects diplexer and filter to form path, and three-way signal is combined into two-way output, to realize the function of three-in two-out combiner.

[0015] Combiner is the combiner equipment that multiple relay station's downlink multiway transmitting signal is handled, is combined to one way output.In wireless communication system, the main role of combiner is to combine two or more independent signals into a shared transmission path, which can effectively improve the spectrum utilization, reduce signal interference and realize simultaneous communication of multiple users.

[0016] In critical communication environment, one of the biggest advantages of 400MHz spectrum is its wide range, most commercial LTE bands operate above 700MHz, some 5G networks up to 39GHz, which enables them to provide high-quality, low-latency applications required by applications such as high-profile data rates, however, the disadvantage is that the signal decays rapidly, resulting in the need for a very dense base station network, requiring tens of thousands of base stations to fully cover commercial LTE. The second major advantage of lower attenuation of signals in 400MHz spectrum is that it can penetrate walls and other solid surfaces, which makes it widely used in radio stations, subways, railways, shopping malls, buildings, etc.

[0017] The embodiment optimizes the hard connection structure into an integrated design, greatly reduces the cost and size through internal 50-ohm connection, and optimizes the traditional two sets of systems into the integrated scheme, thereby fully satisfying the signal transmission.

[0018] As a further improvement of the utility model, the two-in two-out bridge 6 includes a bridge first input end and a bridge second input end, signals enter the bridge from the bridge first input end and the bridge second input end, and are output from the bridge first output end and the bridge second output end to the total output port 3; the two-in two-out bridge 6 is fixed in the combiner main body 1 through the polytetrafluoroethylene fixing structure.

[0019] As a further improvement of the utility model, the combiner main body 1 is an aluminum alloy cavity, and the filter therein includes a first filter, a second filter and a third filter arranged side by side. The first filter includes a first resonant column group, the first total input port 4 outputs to an inductive copper sheet after inputting the first resonant column group, and the inductive copper sheet is connected to the duplexer first input end through an ohmic adapter. The second filter includes a second resonant column group, the second total input port 4 outputs to a capacitive fly rod after inputting the first resonant column group, and the capacitive fly rod is connected to the duplexer second input end. The third filter includes a third resonant column group, the third total input port 4 is connected to the third resonant column group, and an input tap copper sheet is arranged at the connection and connected to the SMA connector on the cover plate 2; the output end of the third resonant column group is connected to the capacitive fly rod, and the capacitive fly rod is connected to the bridge second input end through an output tap copper sheet. The two-way signals of the first total input port 4 and the second total input port 4 are formed into a passage through HFSS and AWR simulation, the two-way signals are synthesized, a 50-ohm adapter is connected to the bridge first input end, and the two-way signals are output with the same amplitude.

[0020] Specifically, the filter resonant column 5 is installed in the aluminum alloy cavity and fixed by a screw, the third total input port 4 is provided with a connector N-F welded to a fly rod coupling cap arranged on the total input port 4, the input signal passes through the filter resonant column 5 to adjust the time delay, and a polytetrafluoroethylene dielectric block is installed on the aluminum alloy cavity to realize out-of-band suppression of the filter passage. The bridge conductor sheet group is arranged on the two-in two-out bridge 6, the bridge conductor sheet is composed of a polytetrafluoroethylene rod and a polytetrafluoroethylene block, the output end of the bridge conductor sheet is provided with an N-F connector, and the input end of the bridge conductor sheet is provided with a 50-ohm adapter. The duplexer input end, the filter input end and the 50-ohm adapter on the input end of the bridge conductor sheet are connected.

[0021] As a further improvement of the utility model, the cover plate 2 comprises a bridge cover plate 8, and the bridge cover plate 8 is located above the two-in-two-out bridge 6; the cover plate 2 further comprises a combiner cover plate 7, and the combiner cover plate 7 is located above the filter; the cover plate 2 further comprises a shielding cover, and the shielding cover covers the bridge cover plate 8 and the combiner cover plate 7. The filter, the diplexer and the two-in-two-out bridge 6 and the like structures are fixed in the combiner main body 1 through the polytetrafluoroethylene fixing structure. The polytetrafluoroethylene fixing structure and the shielding cover ensure the stability of signal transmission in the filter, the diplexer and the two-in-two-out bridge 6, and the signal transmission will not be interfered by the metal fixing part and the interference between signals.

[0022] Embodiment two: a three-in-two-out radio combiner, comprising a combiner main body 1, the combiner main body 1 is provided with a cover plate 2, one end of the combiner main body 1 is provided with two total output ports 3, and the other end is provided with three total input ports 4; the three input ports are connected with three filters in the combiner main body 1, wherein two filter output ends are connected with a diplexer, the synthesized signal of the diplexer is output to a first input end of a two-in-two-out bridge 6 through an ohmic adapter, another filter output end is connected with a second input end of the two-in-two-out bridge 6 through an ohmic adapter, and two output ports of the two-in-two-out bridge 6 are connected with the total output port 3. The two-in-two-out bridge 6 connector is connected with the diplexer and the filter group through a 300-1000MHz frequency band, three-way signals are combined into two-way output, and the function of the three-in-two-out combiner is realized.

[0023] In the embodiment, the connecting structure is hard-connected and optimized into an integrated design, the two-in-two-out bridge 6, the diplexer and the filter group are connected through internal 50-ohm connection and different types of connectors, the cost and the size are greatly reduced, the traditional two sets of systems are optimized into the integrated scheme, and the transmission of signals is completely met.

[0024] The combiner is a combiner device for processing and combining multiple downlink multi-channel transmission signals of multiple relay stations into one output. In a wireless communication system, the main function of the combiner is to combine two or more independent signals into a shared transmission path, which can effectively improve the spectrum utilization rate, reduce signal interference and realize simultaneous communication of multiple users.

[0025] In a critical communication environment, one of the biggest advantages of the 400MHz spectrum is its wide range, most commercial LTE bands operate above 700MHz, and some 5G networks reach up to 39GHz, which enables them to provide high-quality, low-latency and other applications required by attractive data rates, however, the disadvantage is that the signal decays rapidly, resulting in the need for a very dense base station network, requiring tens of thousands of base stations to fully cover commercial LTE. The second major advantage of the lower attenuation of signals in the 400MHz spectrum is that it can penetrate walls and other solid surfaces, which makes it widely used in radio stations, subways, railways, shopping malls, buildings and the like.

[0026] As a further improvement of the utility model, the two-in two-out bridge 6 includes a bridge first input end and a bridge second input end, signals enter the bridge from the bridge first input end and the bridge second input end, and are output from the bridge first output end and the bridge second output end to the total output port 3; the two-in two-out bridge 6 is further provided with a 4.3-10 connector connecting the bridge conductor sheet on the two-in two-out bridge 6 and a 50-ohm adapter rod for conversion; the two-in two-out bridge 6 is fixed in the combiner main body 1 by a polytetrafluoroethylene fixing structure.

[0027] As a further improvement of the utility model, the combiner main body 1 is an aluminum alloy cavity, and the filter therein includes a first filter, a second filter and a third filter arranged side by side. The first filter includes a first resonant column group, the first total input port 4 outputs signals to the inductive copper sheet after inputting the signals to the first resonant column group, and the inductive copper sheet is connected to the diplexer first input end through the ohm adapter rod. The second filter includes a second resonant column group, the second total input port 4 outputs signals to the capacitive fly rod after inputting the signals to the first resonant column group, and the capacitive fly rod is connected to the diplexer second input end. The third filter includes a third resonant column group, the third total input port 4 is connected to the third resonant column group, and an input tap copper sheet is connected to the SMA connector on the cover plate 2 at the connection position to enable the sealed transmission of signals. The output end of the third resonant column group is connected to the capacitive fly rod, and the capacitive fly rod is connected to the bridge second input end through an output tap copper sheet. The two-way signals of the first total input port 4 and the second total input port 4 are formed into a channel through HFSS and AWR simulation, two-way signal synthesis is realized, a 50-ohm adapter head is connected to the bridge first input end, and two-way signal same-amplitude output is realized.

[0028] Out-of-band rejection refers to a series of technical means taken in a wireless communication system to effectively eliminate or reduce the problem of receiver performance deterioration caused by a strong interference signal received. It is achieved by identifying, measuring and estimating the parameters of the interference signal, and then using these parameters to offset or reduce the influence of the interference signal on the main signal, thereby ensuring the reliability and performance of the communication system.

[0029] In filter design, out-of-band rejection refers to the attenuation ability of a filter to signals outside the passband. The higher the out-of-band rejection, the stronger the filter's suppression ability to signals outside the passband, thereby reducing the interference of signals outside the passband on signals inside the passband.

[0030] In filter design, out-of-band rejection is one of the important indicators to measure the performance of the filter. High-performance filter needs to have a higher level of out-of-band rejection to ensure effective attenuation of signals outside the passband. By adjusting the structure, parameters and materials of the filter, etc. Methods such as using high-performance filter materials, optimizing the topology of the filter, etc.

[0031] The embodiment realizes out-of-band rejection through the shielding cover, the polytetrafluoroethylene fixing structure and the flybar, etc.

[0032] Specifically, the filter resonant column 5 is installed in the aluminum alloy cavity and fixed by screws, the third total input port 4 is provided with a connector N-F connected to the flybar coupling cap provided on the total input port 4, the input signal passes through the filter resonant column 5 to adjust the time delay, and the polytetrafluoroethylene dielectric block is installed on the aluminum alloy cavity to realize out-of-band rejection of the filter passageway. The two-in-two-out bridge 6 is provided with a bridge conductor sheet group, the bridge conductor sheet is composed of a polytetrafluoroethylene rod and a polytetrafluoroethylene block, the output end of the bridge conductor sheet is provided with an N-F connector, and the input end of the bridge conductor sheet is provided with a 50-ohm adapter rod. The duplex input end, the filter input end and the 50-ohm adapter rod on the input end of the bridge conductor sheet are connected.

[0033] As a further improvement of the utility model, the cover plate 2 includes a bridge cover plate 8 located above the two-in-two-out bridge 6, the cover plate 2 further includes a combiner cover plate 7 located above the filter, and the cover plate 2 further includes a shielding cover covering the bridge cover plate 8 and the combiner cover plate 7. The filter, the duplex and the two-in-two-out bridge 6 are fixed in the combiner main body 1 by the polytetrafluoroethylene fixing structure. The polytetrafluoroethylene fixing structure and the shielding cover ensure the stability of signal transmission in the filter, the duplex and the two-in-two-out bridge 6, and the transmission interference caused by metal fixing parts and the interference between signals are avoided.

[0034] The above specific embodiments are only the preferred embodiments of the utility model, and do not limit the specific implementation structure and implementation range of the utility model. In fact, some equivalent changes can also be made according to the shape, structure and design purpose of the utility model. Therefore, any equivalent changes made according to the shape, structure and design purpose of the utility model should be included in the protection scope of the utility model, that is, these equivalent changes should be protected by the utility model.

Claims

1. A three-to-two radio combiner, comprising: The combiner main body is provided with a cover plate, two total output ports at one end of the combiner main body, and three total input ports at the other end; the three total input ports are connected with three filters inside the combiner main body, wherein two filter output ends are connected with a diplexer, the diplexer synthesizes a signal and outputs the signal to a first input end of a two-in-two-out bridge, the other filter output end is connected with a second input end of the two-in-two-out bridge, and two output ports of the two-in-two-out bridge are connected with the total output ports.

2. The 3-to-2 radio combiner of claim 1, wherein, The two-in-two-out bridge comprises a bridge first input end and a bridge second input end, signals enter the bridge from the bridge first input end and the bridge second input end, and are output from a bridge first output end and a bridge second output end to the total output ports; the two-in-two-out bridge is further provided with a 4.3-10 connector; and the two-in-two-out bridge is fixed in the combiner main body by a polytetrafluoroethylene fixing structure.

3. The 3-to-2 radio combiner of claim 1, wherein, The filter comprises a first filter, a second filter and a third filter arranged side by side.

4. The 3-to-2 radio combiner of claim 3, wherein, The first filter comprises a first resonant column group, a first total input port signal is input to the first resonant column group and then output to an inductive copper sheet, and the inductive copper sheet is connected with a diplexer first input end through an ohmic adapter rod.

5. The 3-to-2 radio combiner of claim 3, wherein, The second filter comprises a second resonant column group, a second total input port signal is input to the first resonant column group and then output to a capacitive flybar, and the capacitive flybar is connected with a diplexer second input end.

6. The 3-to-2 radio combiner of claim 3, wherein, The third filter comprises a third resonant column group, a third total input port is connected with the third resonant column group, an input tap copper sheet at the connection position is connected with an SMA connector on the cover plate; an output end of the third resonant column group is connected with a capacitive flybar, and the capacitive flybar is connected with a bridge second input end through an output tap copper sheet.

7. The 3-to-2 radio combiner of claim 1, wherein, The cover plate comprises a bridge cover plate located above the two-in-two-out bridge; the cover plate further comprises a combiner cover plate located above the filter; and the cover plate further comprises a shielding cover covering the bridge cover plate and the combiner cover plate.

8. The 3-to-2 radio combiner of claim 1 or 3, wherein, The filter is fixed in the combiner main body by a polytetrafluoroethylene fixing structure.

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