CN114696055A - Multi-path same-frequency combiner - Google Patents
Multi-path same-frequency combiner Download PDFInfo
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Abstract
The application relates to a multi-path same-frequency combiner. The multi-path same-frequency combiner comprises two first combining units, a second combining unit and two couplers which are in one-to-one correspondence with the two first combining units; each first combining unit is used for combining signals respectively input by the plurality of first input ports to obtain a first combined signal and outputting the first combined signal from a first output port; each coupler is used for coupling the first combining signal output by the corresponding first combining unit to obtain a coupling signal, and inputting the coupling signal to the second combining unit; and the second combining unit is used for combining the input coupling signals to obtain a second combined signal. The same-frequency combiner can improve the signal coverage range of the 5G base station and reduce the number of the 5G base stations, thereby reducing the cost of the 5G system.
Description
Technical Field
The application relates to the technical field of combiners, in particular to a multi-path same-frequency combiner.
Background
With the continuous development of Communication Technology, especially the evolution of 5G (english: 5th Generation Mobile Communication Technology, abbreviated as 5G), the existing Communication frequency band is becoming more abundant. However, in practical applications, it is found that the higher the frequency band, the greater the signal fading, for example, the 2.6GHz band does not transmit half as much as the low frequency system. This also results in 5G technology requiring more base stations to achieve the same signal coverage effect as other systems.
However, since more 5G base stations need to be installed, the cost of the 5G system is increased dramatically, which is not favorable for the popularization of the 5G system.
Disclosure of Invention
In view of the above, it is desirable to provide a multi-path and co-frequency combiner capable of reducing the cost.
A multi-path same-frequency combiner comprises two first combining units, a second combining unit and two couplers which are in one-to-one correspondence with the two first combining units;
each first combining unit is used for combining signals respectively input by the plurality of first input ports to obtain a first combined signal and outputting the first combined signal from a first output port;
each coupler is used for coupling the first combining signal output by the corresponding first combining unit to obtain a coupling signal, and inputting the coupling signal to the second combining unit;
and the second combining unit is used for combining the input coupling signals to obtain a second combined signal, and the second combined signal is used for calibrating the amplitude and the phase of the signal input by the first input port or monitoring the signal.
In one embodiment, the first combining unit includes two first ring bridges and one second ring bridge;
the first annular bridge is used for combining signals respectively input by the first input ports to obtain intermediate signals and outputting the intermediate signals to the second annular bridge;
and the second annular bridge is used for combining the intermediate signals input by the first annular bridges to obtain a first combined signal and outputting the first combined signal from the first output port.
In one embodiment, the first annular bridge comprises a first port, a second port, a third port, and a fourth port;
the first port and the second port are respectively connected with an information source and used as a first input port for receiving input signals;
the third port is connected with a first load;
the fourth port is connected to the second ring bridge for transmitting the intermediate signal to the second ring bridge.
In one embodiment, the electrical length between the first port and the fourth port, the electrical length between the second port and the fourth port, and the electrical length between the second port and the third port are equal and are 1/4 times the wavelength of the input signal;
the electrical length between the first port and the third port is 3/4 times the wavelength of the incoming signal.
In one embodiment, the first port is 90 ° out of phase with the fourth port; the phase difference between the first port and the third port is 270 degrees; the phase difference between the second port and the fourth port is 90 degrees; the second port is 90 out of phase with the third port.
In one embodiment, the fifth port and the sixth port are respectively connected with each first annular bridge in a one-to-one correspondence manner, and are used for receiving intermediate signals;
the seventh port is connected with the second load;
and an eighth port for outputting the first combined signal from the first output port.
In one of the embodiments, the electrical length between the fifth port and the eighth port, the electrical length between the sixth port and the eighth port, and the electrical length between the sixth port and the seventh port are equal and are 1/4 of the wavelength of the input signal;
the electrical length between the fifth port and the seventh port is 3/4 times the wavelength of the incoming signal.
In one embodiment, the fifth port is 90 ° out of phase with the eighth port; the phase difference between the fifth port and the seventh port is 270 degrees; the phase difference between the sixth port and the eighth port is 90 degrees; the sixth port is 90 ° out of phase with the seventh port.
In one embodiment, the second combining unit comprises a third annular bridge; the third annular bridge comprises a ninth port, a tenth port, an eleventh port, and a twelfth port;
the ninth port and the tenth port are respectively connected with the couplers in a one-to-one correspondence manner and are used for receiving coupling signals;
the eleventh port is connected with a third load;
a twelfth port for outputting the second combined signal from the second output port.
In one of the embodiments, the electrical length between the ninth port and the twelfth port, the electrical length between the tenth port and the twelfth port, and the electrical length between the tenth port and the eleventh port are equal and are 1/4 of the wavelength of the input signal;
the electrical length between the ninth port and the eleventh port is 3/4 the wavelength of the incoming signal.
In one embodiment, the ninth port is 90 ° out of phase with the twelfth port; the phase difference between the ninth port and the eleventh port is 270 degrees; the phase difference between the tenth port and the twelfth port is 90 degrees; the tenth port is 90 ° out of phase with the eleventh port.
In one embodiment, the number of the first input ports is four.
The multi-path same-frequency combiner can improve the signal coverage range of the 5G base station and reduce the number of the 5G base stations, thereby reducing the cost of the 5G system. The multi-path same-frequency combiner comprises two first combining units, a second combining unit and two couplers which are in one-to-one correspondence with the two first combining units; each first combining unit is used for combining signals respectively input by the plurality of first input ports to obtain a first combined signal and outputting the first combined signal from a first output port; each coupler is used for coupling the first combining signal output by the corresponding first combining unit to obtain a coupling signal, and inputting the coupling signal to the second combining unit; and the second combining unit is used for combining the input coupling signals to obtain a second combined signal. The same-frequency combiner has the characteristics of high isolation, small phase difference, coupling fluctuation and insertion loss fluctuation, has small power loss in a normal working state, can overcome the difficulty of high-frequency transmission, and can meet the combining requirement of the existing 5G system.
Drawings
Fig. 1 is a block diagram of a multi-path same-frequency combiner;
FIG. 2 is a block schematic diagram of the present application;
FIG. 3 is a block diagram of a multi-path on-channel combiner in one embodiment;
fig. 4 is a printed board circuit diagram of an embodiment of the present application;
FIG. 5 is a cavity diagram of an embodiment of the present application;
FIG. 6 is a return loss simulation diagram;
FIG. 7 is a schematic diagram of isolation simulation;
FIG. 8 is a schematic diagram of coupling degree simulation;
FIG. 9 is a schematic diagram of phase difference simulation;
fig. 10 is a schematic diagram of an insertion loss simulation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that 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. 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
With the rapid development of mobile communication and the limitation of frequency allocation, many base stations need to output and input multiple signals, and in this case, a combiner with the same frequency is produced.
At present, the updating of the 5G technology is evolved into the production and life of people, and great convenience is brought. In practical application, the 5G base station is characterized in that the signal is located in a high frequency band, and the higher the frequency band is, the greater the signal attenuation is, and the smaller the coverage area is. For example, the 2.6GHz band does not transmit as much as half of a low frequency system. This also results in the need for more base stations to achieve the same signal coverage effect as other systems when applying 5G technology. This increases the communication cost by increasing the number of base stations.
In order to improve the signal coverage of the 5G base stations and reduce the number of the 5G base stations, thereby reducing the construction cost of the 5G system, the embodiment of the application provides a multi-path same-frequency combiner, and the same-frequency combiner has the characteristics of high isolation, small phase difference, and small coupling fluctuation and insertion loss fluctuation. The same-frequency signals are combined, and the power of output signals is increased to improve the signal coverage of the 5G base station. The structure and function of the multi-path same-frequency combiner are explained as follows:
as shown in fig. 1, which shows a block diagram of a multi-path same-frequency combiner, it can be seen from fig. 1 that the multi-path same-frequency combiner includes two first combining units, one second combining unit, and two couplers one-to-one corresponding to the two first combining units; the first combining unit and the second combining unit are cascaded through the coupler, specifically, the first combining unit comprises a plurality of first input ports and a first output port, the plurality of first input ports are used for receiving input signals, the first combining unit combines signals input from the first input ports to obtain first combined signals, and then the first combining unit outputs the first combined signals through the first output port. For example, the first combining unit includes two first input ports, and the two first input ports respectively input the a signal and the B signal, where the a signal and the B signal have the same frequency. The corresponding first combined signal is the a signal + B signal.
In the embodiment of the present application, as shown in fig. 1, a coupler is disposed between the first combining unit and the second combining unit, and the coupler is configured to couple the first combining signal output by the first combining unit and obtain a coupled signal. Specifically, the coupler may couple each signal in the first combined signal to obtain a corresponding coupled signal, and receive the above example, in the process of sequentially transmitting the a signal and the B signal, when the a signal in the first combined signal passes through the coupler, the coupler may induce the a signal to obtain a corresponding a-coupled signal, and when the B signal in the first combined signal passes through the coupler, the coupler may induce the B signal to obtain a corresponding B-coupled signal.
In this embodiment of the application, the second combining unit includes two input ports and an output port, where the two input ports are respectively connected to the two couplers and used for obtaining the coupling signal, and the second combining unit combines the input coupling signal to obtain a second combining signal, and outputs the second combining signal from the output port. The second combined signal is used for calibrating the amplitude and the phase of the signal input by the first input port or monitoring the signal.
Optionally, in this embodiment of the application, the second combining unit further includes a second transmission line and a second port, where the second transmission line is disposed between the second port and the output end of the second combining unit, and the second port is connected to the previous-stage processing circuit of the multi-path same-frequency combiner. When the first combining unit is used, the second combining signal can be transmitted to the upper-level processing circuit through the output port, the second transmission line and the second port of the second combining unit, and the upper-level processing circuit calibrates the amplitude and the phase of the signal input by each first input port of the first combining unit or monitors the signal.
Optionally, in this embodiment of the application, the first combining unit further includes a first transmission line and a first port, where the first transmission line is disposed between the first port and the first output port, the first port is connected to the radio frequency antenna, and after the first combined signal is output from the first output port, the first combined signal is transmitted to the first port through the first transmission line, then transmitted to the radio frequency antenna through the first port, and finally transmitted by the radio frequency antenna.
Optionally, in this embodiment of the application, two input ports of the second combining unit are respectively provided with an input transmission line, where one end of the input transmission line is connected to the input port of the second combining unit, and the other end is connected to the load. Accordingly, the coupler is disposed on the first transmission line and the input transmission line. When the first combination signal is transmitted on the first transmission line, the coupler may couple the first combination signal and generate a coupling signal on the input transmission line, and the coupling signal enters the second combination unit through the input transmission line.
The multi-channel same-frequency combiner provided in the embodiment of the application has the characteristics of high isolation, small phase difference, coupling fluctuation and small insertion loss fluctuation, and can meet the combining requirement of a 5G base station.
Optionally, in this embodiment of the application, the number of the first input ports is four, the first combining unit is a 4-in-1 same-frequency combiner, and the second combining unit is a 2-in-1 same-frequency combiner. As shown IN fig. 2, the plurality of first input ports corresponding to the 4-IN-1 same-frequency combiner 1 are IN1, IN2, IN3, and IN 4; a plurality of first input ports corresponding to the 4-IN-1 same-frequency combiner 2 are IN5, IN6, IN7 and IN 8; the frequency of the signals input by the 8 first input ports is the same. The coupler comprises a coupler 1 and a coupler 2, the coupler 1 and the coupler 2 are respectively arranged on an output line corresponding to a first output port of the first combining unit and are used for sensing a first combining signal to obtain a coupled signal, the coupled signal enters the 2-in-1 same-frequency combiner through an input end of the 2-in-1 same-frequency combiner to be combined to obtain a second combining signal, and the second combining signal is substantially a coupled signal and can be used for monitoring a signal scene and calibrating the amplitude and phase of the signal input by the first input port. In the embodiment of the present application, the multi-path same-frequency combiner shown in fig. 2 can meet the combining requirement of the existing 5G base station 8TR antenna.
On the basis of the foregoing embodiment, optionally, in this embodiment of the application, the first combining unit includes three annular bridges, and the three annular bridges form a 4-in-1 same-frequency combiner through cascading. The single port of the ring bridge serves as a first input port, and a signal is input from the single port of the ring bridge and output from the port 1. The coupler couples signals from a main line through edge coupling, and the coupled signals are output from a port 2 through a 2-in-1 same-frequency combiner.
As shown in fig. 3, a multi-path same-frequency combiner is shown, which includes two first annular bridges and one second annular bridge, wherein output ports of the two first annular bridges are connected to input ports of the one second annular bridge. The first annular bridge comprises an input port which is a single port, wherein the input port can be connected with a signal source and used for receiving an input signal transmitted by the signal source, the first annular bridge can combine the received input signal for the first time to obtain an intermediate signal, and then the first annular bridge can send the intermediate signal to the second annular bridge through the output port. The second annular bridge is used for combining the intermediate signals input by the first annular bridges to obtain first combined signals.
Optionally, in an embodiment of the present application, as shown in fig. 4 and 5, fig. 4 shows a printed board circuit diagram of the embodiment of the present application, and fig. 5 is a cavity diagram of the printed board, wherein the printed board is fixed in the cavity by screws, and a front surface of the cavity includes a plurality of partition walls for avoiding mutual influence between two first annular bridges and between the first annular bridge and the second annular bridge. The back of the cavity is also provided with heat dissipation teeth for dissipating heat of the load.
The first annular bridge is explained below: the first annular bridge comprises a first port a, a second port B, a third port d and a fourth port c, wherein the first port a is connected with a port A through a transmission line, the second port B is connected with a port B through a transmission line, and the port A and the port B are respectively connected with an information source and used as a first input port for receiving input signals; the third port d is connected with a first load; the fourth port c is connected to the second annular bridge for transmitting the intermediate signal to the second annular bridge.
Optionally, the first annular bridge and the second annular bridge are connected by a transmission line, and the intermediate signal is transmitted to the input port of the second annular bridge by the transmission line.
Alternatively, in the embodiment of the present application, as shown in fig. 4, the electrical length between the first port a and the fourth port c, the electrical length between the second port b and the fourth port c, and the electrical length between the second port b and the third port d are equal to each other, and are 1/4 of the wavelength of the input signal; the electrical length between the first port a and the third port d is 3/4 times the wavelength of the input signal. The phase difference can be guaranteed to be smaller than the threshold value by the equal electrical lengths, so that the isolation between the first port and the second port can be made very high according to the superposition and reduction principle of the phase.
Optionally, in this embodiment of the present application, the phase difference between the first port a and the fourth port c is 90 °; the phase difference between the first port a and the third port d is 270 degrees; the phase difference between the second port b and the fourth port c is 90 degrees; the second port b is 90 out of phase with the third port d.
The operation of the first annular bridge will now be explained:
the electrical length ac ═ bc ═ bd ═ λ/4, ad ═ 3 λ/4, and the corresponding phase shift θ ac ═ θ bc ═ θ bd ═ 90 °, θ ad ═ 270 °.
When a signal is input to the first port a and the other ports are matched, two paths from the first port a to the fourth port c are ac and adbc, where θ ac is 90 °, θ adbc is 270 ° +90 ° +90 ° -360 ° -90 °, and the phase difference is 0, in which case the signals are superimposed at the fourth port c.
The two paths from the first port a to the second port b are acb and adb, where θ acb is 90 ° + 180 °, θ adb is 270 ° +90 ° + 360 °, and the phase difference is 180 °, in which case the signals are cancelled at the second port b.
The paths from the first port a to the third port d are two, acbd and ad, where θ acbd is 90 ° +90 ° +90 ° + 270 °, θ ad is 270 °, the phase difference is 0, and in this case, the signals are superimposed at the third port d.
Through the above analysis, when the first port a inputs a signal and the other ports are matched, 3dB of power is output through the fourth port c, and 3dB of power is output to the third port d and absorbed by the first load. Similarly, when the signal is input into the second port b and the other ports are matched, 3dB power is output through the fourth port c, and 3dB power is output to the third port d and absorbed by the first load.
When the first port a to the second port b input the synchronization signal, the above analysis shows that the signal is all output from the fourth port c, and the third port d does not absorb power. Therefore, in a normal working state, the first port a and the second port b can be isolated very high through mutual superposition and cancellation of signals, and simultaneously, the signals can be combined and output to the ports without loss, so that the 5G signals can be covered more widely.
Optionally, in this embodiment of the application, as shown in fig. 4, fig. 4 is a schematic circuit diagram of a second annular bridge, where the second annular bridge includes a fifth port e, a sixth port f, a seventh port g, and an eighth port h, where the fifth port e and the sixth port f are respectively connected to the first annular bridges in a one-to-one correspondence manner, and are configured to receive an intermediate signal; the seventh port g is connected with a second load; the eighth port h is connected to the second annular bridge and configured to output the first combined signal from the first output port.
Optionally, the fifth port e and the sixth port f are respectively connected to the fourth ports of the first annular bridge through the first transmission lines in a one-to-one correspondence manner.
Optionally, in this embodiment of the present application, the electrical length between the fifth port e and the eighth port h, the electrical length between the sixth port f and the eighth port h, and the electrical length between the sixth port f and the seventh port g are equal to each other, and are 1/4 times the wavelength of the input signal;
the electrical length between the fifth port e and the seventh port g is 3/4 times the wavelength of the incoming signal.
Optionally, in this embodiment of the present application, a phase difference between the fifth port e and the eighth port h is 90 °; the phase difference between the fifth port e and the seventh port g is 270 degrees; the phase difference between the sixth port f and the eighth port h is 90 degrees; the sixth port f is 90 ° out of phase with the seventh port g.
The working principle of the second annular bridge is explained below:
the electrical length eh-fh-fg- λ/4, eg-3 λ/4, and the corresponding phase shift θ eh- θ fh- θ fg-90 °, θ eg-270 °.
When the fifth port e inputs a signal and the other ports are matched, two paths from the fifth port e to the eighth port h are eh and egfh, wherein θ eh is 90 °, θ egfh is 270 ° +90 ° +90 ° -360 ° -90 °, and the phase difference is 0, in which case the signals are superimposed at the eighth port h.
The path from the fifth port e to the sixth port f is two, ehf and egf, respectively, where θ ehf is 90 ° + 180 °, θ egf is 270 ° +90 ° + 360 °, and the phase difference is 180 °, in which case the signal is cancelled at the sixth port f.
There are two paths from the fifth port e to the seventh port g, ehfg and eg, where θ ehfg equals 90 ° +90 ° +90 ° + 270 °, θ eg equals 270 °, and the phase difference is 0, in which case the signals are superimposed at the seventh port g.
Through the above analysis, when the signal is input to the fifth port e and the other ports are matched, 3dB of power is output through the eighth port h, and 3dB of power is output to the seventh port g and absorbed by the second load. Similarly, when the signal is input to the sixth port f and the other ports are matched, 3dB power is output through the eighth port h, and 3dB power is output to the seventh port g and absorbed by the second load.
According to the above analysis, in a normal working state, by mutual superposition and cancellation of signals, the first port and the second port (or the fifth port and the sixth port) can achieve high isolation, and simultaneously, the signals can be superposed at the fourth port (or the eighth port) to realize lossless signal combination and output from the output port, so that the signal power is improved, and the signal coverage range of the 5G base station is wider.
On the basis of the foregoing embodiment, optionally, in this embodiment of the application, the second combining unit includes a third annular bridge, and the 2-in-1 same-frequency combiner is formed by the third annular bridge and the two couplers. Optionally, the third ring bridge includes a plurality of input terminals, and the plurality of input terminals are connected to the first output terminal of the first combining unit through transmission lines.
The following describes a structure of the second combining unit in the embodiment of the present application:
as shown in fig. 4, the third annular bridge includes a ninth port i, a tenth port j, an eleventh port k, and a twelfth port m; the ninth port i and the tenth port j are respectively connected with the couplers in a one-to-one correspondence manner and used for receiving coupling signals; the eleventh port k is connected with a third load; the twelfth port m is configured to output the second combined signal from the second output port.
Optionally, the electrical length between the ninth port i and the twelfth port m, the electrical length between the tenth port j and the twelfth port m, and the electrical length between the tenth port j and the eleventh port k are equal and are 1/4 of the wavelength of the input signal; the electrical length between the ninth port i and the eleventh port k is 3/4 times the wavelength of the input signal.
Optionally, the phase difference between the ninth port i and the twelfth port m is 90 °; the phase difference between the ninth port i and the eleventh port k is 270 degrees; the phase difference between the tenth port j and the twelfth port m is 90 degrees; the tenth port j is 90 ° out of phase with the eleventh port k.
The operation of the third annular bridge will now be explained:
the electrical length im is equal to mj and jk is equal to λ/4, ik is equal to 3 λ/4, and the corresponding phase shift is θ im is equal to θ mj and θ jk is equal to 90 °, θ ik is equal to 270 °.
When the ninth port i inputs a signal and the other ports are matched, two paths from the ninth port i to the twelfth port m are im and ikjm, respectively, where θ im is 90 °, θ ikjm is 270 ° +90 ° +90 ° -360 ° -90 °, and the phase difference is 0, in which case the signals are superimposed at the twelfth port m.
The path from the ninth port i to the tenth port j is two, imj and ikj respectively, where θ imj is 90 ° + 180 °, θ ikj is 270 ° +90 ° + 360 °, and the phase difference is 180 °, in which case the signal is cancelled at the tenth port j.
The ninth port i to the eleventh port k have two paths, imjk and ik, respectively, where θ imjk is 90 ° +90 ° +90 ° + 270 °, θ ik is 270 °, and the phase difference is 0, in which case the signals are superimposed at the eleventh port k.
Through the above analysis, when the ninth port i inputs a signal and the other ports are matched, 3dB of power is output through the twelfth port m, and 3dB of power is output to the eleventh port k and absorbed by the third load. Similarly, when the tenth port j inputs a signal and the other ports are matched, 3dB of power is output through the twelfth port m, and 3dB of power is output to the eleventh port k and absorbed by the third load.
In the embodiment of the application, the coupled signal output by the COM3 port is processed by the base station, and then the amplitude and phase calibration or signal monitoring is performed on the input signal.
The technical solution of the present application is further explained below with the aid of simulation:
the technical specification requirements of the patent embodiment are as follows: passband 2515 and 2675MHz, return loss: less than or equal to 6.3dB, isolation greater than or equal to 28dB, output port coupling: 26 +/-0.5 dB and phase difference not greater than 5 deg.
Fig. 6 is a return loss simulation diagram illustrating how well the ports are matched; FIG. 7 is a schematic diagram of an isolation simulation illustrating small interaction of input port signals; FIG. 8 is a schematic diagram of a degree of coupling simulation illustrating a small fluctuation in the degree of coupling; FIG. 9 is a schematic diagram of a phase difference simulation illustrating that the phase difference between input ports is small; fig. 10 is a schematic diagram of an insertion loss simulation.
As can be seen from fig. 6 to 10, the technical specification requirements can be met by using the solutions provided in the embodiments of the present application. The purposes of high isolation, low phase difference and low loss are achieved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. The realization form is not limited to the microstrip line form adopted by the embodiment, but also can be realized by the strip line, the suspension line and other forms containing the technical characteristics of the embodiment. The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (12)
1. A multi-path same-frequency combiner is characterized by comprising two first combining units, a second combining unit and two couplers which are in one-to-one correspondence with the two first combining units;
each first combining unit is configured to combine signals respectively input by a plurality of first input ports to obtain a first combined signal, and output the first combined signal from a first output port;
each coupler is configured to couple the first combining signal output by the corresponding first combining unit to obtain a coupled signal, and input the coupled signal to the second combining unit;
the second combining unit is configured to combine the input coupling signals to obtain a second combined signal.
2. The multi-path same-frequency combiner of claim 1, wherein the first combining unit comprises two first annular bridges and one second annular bridge;
the first annular bridge is configured to combine signals respectively input by the plurality of first input ports to obtain an intermediate signal, and output the intermediate signal to the second annular bridge;
the second annular bridge is configured to combine the intermediate signals input by each of the first annular bridges to obtain the first combined signal, and output the first combined signal from the first output port.
3. The multi-path same-frequency combiner of claim 2, wherein the first annular bridge comprises a first port, a second port, a third port and a fourth port;
the first port and the second port are respectively connected with a signal source and used as the first input port for receiving input signals;
the third port is connected with a first load;
the fourth port is connected to the second ring bridge for transmitting the intermediate signal to the second ring bridge.
4. The multi-path co-frequency combiner of claim 3,
the electrical length between the first port and the fourth port, the electrical length between the second port and the fourth port, and the electrical length between the second port and the third port are equal and are 1/4 of the wavelength of the input signal;
the electrical length between the first port and the third port is 3/4 times the wavelength of the incoming signal.
5. The multi-path co-frequency combiner of claim 3,
the first port is 90 ° out of phase with the fourth port; the phase difference between the first port and the third port is 270 °; the second port is 90 ° out of phase with the fourth port; the second port is 90 ° out of phase with the third port.
6. The multi-path co-frequency combiner of claim 3, wherein the second annular bridge comprises a fifth port, a sixth port, a seventh port, and an eighth port;
the fifth port and the sixth port are respectively connected with each first annular bridge in a one-to-one correspondence manner and used for receiving the intermediate signal;
the seventh port is connected with a second load;
the eighth port is configured to output the first combined signal from the first output port.
7. The multi-path same-frequency combiner of claim 6,
an electrical length between the fifth port and the eighth port, an electrical length between the sixth port and the eighth port, and an electrical length between the sixth port and the seventh port are equal and are 1/4 times the wavelength of the input signal;
the electrical length between the fifth port and the seventh port is 3/4 times the wavelength of the incoming signal.
8. The multi-path same-frequency combiner of claim 6,
the phase difference between the fifth port and the eighth port is 90 degrees; the phase difference between the fifth port and the seventh port is 270 °; the sixth port is 90 ° out of phase with the eighth port; the sixth port is 90 ° out of phase with the seventh port.
9. The multi-path same-frequency combiner of claim 1, wherein the second combining unit comprises a third annular bridge; the third annular bridge comprises a ninth port, a tenth port, an eleventh port, and a twelfth port;
the ninth port and the tenth port are respectively connected with the couplers in a one-to-one correspondence manner and used for receiving the coupling signals;
the eleventh port is connected to a third load;
the twelfth port is configured to output the second combined signal from a second output port.
10. The multi-path co-frequency combiner of claim 9,
an electrical length between the ninth port and the twelfth port, an electrical length between the tenth port and the twelfth port, and an electrical length between the tenth port and the eleventh port are equal and are 1/4 of a wavelength of an input signal;
the electrical length between the ninth port and the eleventh port is 3/4 times the wavelength of the incoming signal.
11. The multi-path co-frequency combiner of claim 9,
the ninth port is 90 ° out of phase with the twelfth port; the ninth port is 270 ° out of phase with the eleventh port; the tenth port is 90 ° out of phase with the twelfth port; the tenth port is 90 ° out of phase with the eleventh port.
12. The multi-path co-frequency combiner of claim 2,
the multi-path same-frequency combiner further comprises a printed board and a printed board cavity, and the printed board is fixed in the printed board cavity through a screw;
therefore, the cavity of the printed board comprises a cavity front face and a cavity back face, wherein the cavity front face comprises a plurality of isolation walls for isolating the first annular bridge and the second annular bridge, and the cavity back face is provided with heat dissipation teeth for dissipating heat of a load.
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