CN115719870B - Multipath same-frequency combiner - Google Patents
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Abstract
The application relates to a multipath same-frequency combiner, which comprises: each first combining module is used for combining input signals to obtain first combined signals and outputting the first combined signals from a first output port; the first combining module comprises at least one Gysel combining unit; and the second combining module is respectively connected with the two first combining modules and is used for combining the two first combining signals to obtain a second combining signal and outputting the second combining signal from the second output port. By arranging at least one Gysel combining unit in the first combining module, the Gysel combining unit can improve the power capacity of the multipath same-frequency combiner through two loads arranged on the Gysel combining unit.
Description
Technical Field
The application relates to the technical field of mobile communication, in particular to a multipath same-frequency combiner.
Background
When mobile communication coverage engineering is shared by common construction, a combiner is generally required to combine input multi-band signals together and output the signals so as to share an antenna and a feeder system. The power capacity of the combiner in the conventional art is low.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a multipath on-channel combiner that can improve power capacity.
The application provides a multipath same-frequency combiner, which comprises:
each first combining module is used for combining input signals to obtain a first combined signal, and outputting the first combined signal from a first output port; the first combining module comprises at least one Gysel combining unit;
And the second combining module is respectively connected with the two first combining modules and is used for combining the two first combining signals to obtain a second combining signal and outputting the second combining signal from a second output port.
In one embodiment, the first combining module includes: the device comprises two first Gysel combining units and a second Gysel combining unit, wherein each first Gysel combining unit is used for combining input signals to obtain intermediate signals, and the second Gysel combining unit is respectively connected with the two first Gysel combining units and combines the two intermediate signals to obtain the first combined signals.
In one embodiment, the first Gysel combining unit includes: the first circuit, the second circuit, the third circuit, the fourth circuit and the fifth circuit are sequentially connected end to form a closed loop;
one end of the first circuit is used for receiving the input signal, one end of the second circuit is used for receiving the input signal, the junction of the first circuit and the second circuit is used for outputting the intermediate signal, the junction of the fourth circuit and the fifth circuit is used for connecting a first load, and the junction of the third circuit and the fourth circuit is used for connecting a second load;
The electrical lengths of the first line, the second line, the third line and the fifth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the fourth line is 1/2 of the wavelength of the input signal.
In one embodiment, the first Gysel combining unit further includes: a sixth line, a seventh line, and an eighth line, wherein one end of the sixth line is connected to the fifth line, the other end of the sixth line is connected to one end of the seventh line and the first load, one end of the eighth line is connected to the third line, and the other end of the eighth line is connected to the other end of the seventh line and the second load;
The electrical lengths of the sixth line and the eighth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the seventh line is 1/2 of the wavelength of the input signal.
In one embodiment, the impedance of the third line, the impedance of the fifth line, the impedance of the sixth line, and the impedance of the eighth line are equal and are all input signal impedances, and the total impedance of the first line and the second line isMultiple input signal impedance.
In one embodiment, the second Gysel combining unit includes: a ninth line, a tenth line, an eleventh line, a twelfth line, and a thirteenth line, which are connected end to end in order and form a closed loop;
one end of the ninth line is used for receiving the intermediate signal, one end of the tenth line is used for receiving the intermediate signal, a joint of the ninth line and the tenth line is used for outputting the first combined signal, a joint of the twelfth line and the thirteenth line is used for connecting a third load, and a joint of the eleventh line and the twelfth line is used for connecting a fourth load;
The electrical lengths of the ninth line, the tenth line, the eleventh line and the thirteenth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the twelfth line is 1/2 of the wavelength of the input signal.
In one embodiment, the second Gysel combining unit further includes: a fourteenth line, a fifteenth line, and a sixteenth line, one end of the fourteenth line being connected to the thirteenth line, the other end of the fourteenth line being connected to one end of the fifteenth line and the third load, one end of the sixteenth line being connected to the eleventh line, the other end of the sixteenth line being connected to the other end of the fifteenth line and the fourth load;
the electrical lengths of the fourteenth line and the sixteenth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the fifteenth line is 1/2 of the wavelength of the input signal.
In one embodiment, the impedance of the eleventh line, the impedance of the thirteenth line, the impedance of the fourteenth line, and the impedance of the sixteenth line are equal and are all input signal impedances, the total impedance of the ninth line and the tenth line beingMultiple input signal impedance.
In one embodiment, the second combining module includes: the system comprises two signal coupling units and a third Gysel combining unit, wherein each signal coupling unit is used for coupling the first combined signal to obtain a coupled signal, and the third Gysel combining unit is used for combining the two coupled signals to obtain the second combined signal.
In one embodiment, the third Gysel combining unit includes: a seventeenth line, an eighteenth line, a nineteenth line, a twentieth line, and a twentieth line, which are connected end to end in order and form a closed loop;
One end of the seventeenth line is used for receiving the coupling signal, one end of the eighteenth line is used for receiving the coupling signal, a joint of the seventeenth line and the eighteenth line is used for outputting the second combined signal, a joint of the twentieth line and the twenty first line is used for connecting a fifth load, and a joint of the nineteenth line and the twentieth line is used for connecting a sixth load;
the seventeenth line, the eighteenth line, the nineteenth line and the twenty first line have equal electrical lengths and are each 1/4 of the wavelength of the input signal, and the twentieth line has an electrical length of 1/2 of the wavelength of the input signal.
In one embodiment, the third Gysel combining unit further includes: a twenty-second line, a twenty-third line, and a twenty-fourth line, one end of the twenty-second line being connected to the twenty-first line, the other end of the twenty-second line being connected to one end of the twenty-third line and the fifth load, one end of the twenty-fourth line being connected to the nineteenth line, the other end of the twenty-fourth line being connected to the other end of the twenty-third line and the sixth load;
the twenty-second line and the twenty-fourth line have equal electrical lengths and are each 1/4 of the input signal wavelength, and the twenty-third line has an electrical length of 1/2 of the input signal wavelength.
In one embodiment, the impedance of the nineteenth line, the twenty-first line, the twenty-second line, and the twenty-fourth line are equal and are all input signal impedances, and the total impedance of the seventeenth line and the eighteenth line isMultiple input signal impedance.
According to the multipath same-frequency combiner, at least one Gysel combining unit is arranged in the first combining module, so that input multipath input signals can be combined into one path to obtain a first combined signal, and the first combined signal is output from the first output port. And then, the second combining module is arranged to combine the two paths of first combining signals into a second combining signal, and the second combining signal is output from the second output port. Thus, the input multipath input signals can be synthesized into three paths of signals for output. By arranging the cascading structure in the first combining module, the relative bandwidth of the combiner can be improved, and the Gysel combining unit can improve the power capacity of the combiner through two loads of the Gysel combining unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a multi-path on-channel combiner in one embodiment;
FIG. 2 is a schematic diagram of a multi-path co-channel combiner according to another embodiment;
FIG. 3 is a circuit diagram of a printed circuit board of a multi-path on-channel combiner in one embodiment;
FIG. 4 is a schematic block diagram of a multi-path co-channel combiner according to another embodiment;
FIG. 5 is a schematic diagram of return loss simulation in one embodiment;
FIG. 6 is a schematic diagram of a simulation of isolation in one embodiment;
FIG. 7 is a schematic diagram of coupling degree simulation in one embodiment;
FIG. 8 is a schematic diagram of phase difference simulation in one embodiment;
Fig. 9 is a schematic diagram illustrating insertion loss simulation in one embodiment.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application 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.
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 application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.
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 be connected to the other element through intervening elements. Further, "connection" in the following embodiments should be understood as "electrical connection", "communication connection", and the like if there is transmission of electrical signals or data between objects to be connected.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a multi-path on-channel combiner, including: each first combining module is used for combining input signals to obtain first combined signals and outputting the first combined signals from a first output port; the first combining module comprises at least one Gysel combining unit; and the second combining module is respectively connected with the two first combining modules and is used for combining the two first combining signals to obtain a second combining signal and outputting the second combining signal from the second output port.
Specifically, the first combining module in the embodiment of the application is a combining module including at least one Gysel combining unit, where the Gysel combining unit is a two-way synthesizer made of a Gysel in-phase synthesis network, which can synthesize two input signals into one signal, and can add all power to the output end under normal and ideal working conditions of all input power. The first combining module can form a cascade structure by arranging a plurality of Gysel combining units so as to combine multiple paths of input signals. For example, only one Gysel combining unit may be provided to combine two input signals, or three Gysel combining units may be provided to combine four input signals, or seven Gysel combining units may be provided to combine eight input signals. So that the first combining module can be a 2-in-1 same-frequency combiner, a 4-in-1 same-frequency combiner, an 8-in-1 same-frequency combiner or the like. It can be understood that the Gysel combining unit can be cascaded with 2 in 1 combining units of other network structures, so as to form a first combining module.
The second combining module is used for combining the coupled two paths of first combining signals to obtain a second combining signal, and the second combining module is a 2-in-1 combining unit. COM1 and COM2 in fig. 1 are first output ports for outputting the first combined signal after being combined, and COM3 is second output ports for outputting the second combined signal after being combined. It can be understood that the signals input in the signal input ports of the first combining module and the second combining module are synchronous signals.
According to the multipath same-frequency combiner, at least one Gysel combining unit is arranged in the first combining module, so that input multipath input signals can be combined into one path to obtain a first combined signal, and the first combined signal is output from the first output port. And then, the second combining module is arranged to combine the two paths of first combining signals into a second combining signal, and the second combining signal is output from the second output port. Thus, the input multipath input signals can be synthesized into three paths of signals for output. By arranging the cascading structure in the first combining module, the relative bandwidth of the combiner can be improved, and the Gysel combining unit can improve the power capacity of the combiner through two loads arranged on the Gysel combining unit.
In one embodiment, as shown in fig. 2, the first combining module includes: the system comprises two first Gysel combining units and a second Gysel combining unit, wherein each first Gysel combining unit is used for combining input signals to obtain intermediate signals, and the second Gysel combining units are respectively connected with the two first Gysel combining units and are used for combining the two intermediate signals to obtain first combined signals.
Specifically, the first combining module in the embodiment of the application forms a cascade structure by arranging three Gysel combining units, so that the first combining module can combine four paths of input signals into a first combining signal, and the first combining module is a 4-in-1 same-frequency combiner. IN1 to IN8 IN fig. 2 are signal input ports for receiving input signals. The multi-channel same-frequency combiner can enable eight input signals to be synthesized into three signals for output. The first combining module improves the relative bandwidth and the power capacity of the combiner through the three arranged Gysel combining units, and can enable the signal coverage range to be wider when the signal is transmitted through the antenna.
In one embodiment, as shown in fig. 3, the first Gysel combining unit includes: the first circuit, the second circuit, the third circuit, the fourth circuit and the fifth circuit are sequentially connected end to form a closed loop; one end of the first circuit is used for receiving an input signal, one end of the second circuit is used for receiving the input signal, the joint of the first circuit and the second circuit is used for outputting an intermediate signal, the joint of the fourth circuit and the fifth circuit is used for connecting a first load, and the joint of the third circuit and the fourth circuit is used for connecting a second load; the first line, the second line, the third line and the fifth line have equal electrical lengths, and are 1/4 of the wavelength of the input signal, and the fourth line has an electrical length of 1/2 of the wavelength of the input signal.
Specifically, in the embodiment of the application, a first line is an ab section, a second line is a bc section, a third line is a cd section, a fourth line is a de section, a fifth line is an ae section, and a closed 'mouth' -shaped structure is formed through end-to-end connection. The port a of the first line and the port c of the second line are used for receiving input signals, the port b is used for outputting intermediate signals, and the node e and the node d are used for connecting a first load and a second load respectively. It can be understood that in this embodiment, the first Gysel combining unit has a "mouth" structure, and the node e and the node d are directly connected to the first load and the second load. When the first Gysel combining unit is in a structure like a Chinese character 'ri', the node e and the node d are indirectly connected with the first load and the second load. The first Gysel combining unit may be made in the form of a microstrip line or an air strip line, etc.
In one embodiment, as shown in fig. 3, the first Gysel combining unit further includes: a sixth line, a seventh line and an eighth line, wherein one end of the sixth line is connected with the fifth line, the other end of the sixth line is connected with one end of the seventh line and the first load, one end of the eighth line is connected with the third line, and the other end of the eighth line is connected with the other end of the seventh line and the second load; the electrical lengths of the sixth line and the eighth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the seventh line is 1/2 of the wavelength of the input signal.
Specifically, in the embodiment of the application, the sixth line is the ef section, the seventh line is the fg section, the eighth line is the dg section, and the node f and the node g are directly connected with the first load and the second load respectively. In this embodiment, the first Gysel combining unit has a "ri" structure, and in some other embodiments, the first Gysel combining unit may also have a "mu" structure.
In one embodiment, the impedance of the third line, the impedance of the fifth line, the impedance of the sixth line, and the impedance of the eighth line are equal and are all input signal impedances, the total impedance of the first line and the second line beingMultiple input signal impedance. As a specific example, in some embodiments, the input signal impedance is 50Ω, zcd = Zae = Zef = Zdg =50Ω, zab=zbc=70.7Ω, and the impedance Zde of the fourth line and the impedance Zfg of the seventh line can be flexibly adjusted according to the required isolation and bandwidth.
Specifically, the working principle of the first Gysel combining unit is described below. Wherein the electrical length ab=bc=cd=ae=ef=dg=λ/4, ac=de=fg=λ/2, the corresponding phase offset θab=θbc=θcd=θae=90 °, θac=180 °. Let the impedance of PORT1 and PORT2 be zp=zo, respectivelyZae = Zcd = Zef = Zdg =zo, zde and Zfg are flexibly adjustable according to the required bandwidth. When PORT1 inputs a signal and the other PORTs match, PORTs 1 to PORT3 have two paths ab and aedcb, at which time θab=90°, θ aedcb =90° +180° +90° +90 ° -360 ° =90°, with a phase difference of 0, and the signals are superimposed on PORT 3. The paths from PORT1 to PORT2 are abc and aedc, θabc=90° +90° =180°, θ aedc =90° +180° +90° =360°, the phase difference is 180 °, and the signal cancels at PORT 2. Through the analysis, when the PORT1 inputs signals and other PORTs are matched, the first Gysel combining unit has a certain branch line directional coupler characteristic, 3dB power is output through the PORT3, 3dB power is absorbed by the first load and the second load, and the absorbed power of the two loads is the same, namely the two loads absorb 6dB of power respectively. Similarly, when PORT2 input signals and other PORTs are matched, 3dB power is output through PORT3, and 3dB power is absorbed by the first load and the second load. When PORT1 and PORT2 input the synchronization signal, analysis by the above method shows that the signals are all output from PORT3, and the first load and the second load do not absorb power. Therefore, in the normal working state, through mutual superposition and cancellation of signals, PORT1 and PORT2 are isolation PORTs, and intermediate signals can be output without loss, so that the power of the signals is improved.
In one embodiment, the second Gysel combining unit includes: a ninth line, a tenth line, an eleventh line, a twelfth line, and a thirteenth line, the ninth line, the tenth line, the eleventh line, the twelfth line, and the thirteenth line being connected end to end in order and forming a closed loop; one end of the ninth line is used for receiving the intermediate signal, one end of the tenth line is used for receiving the intermediate signal, the joint of the ninth line and the tenth line is used for outputting a first combined signal, the joint of the twelfth line and the thirteenth line is used for connecting a third load, and the joint of the eleventh line and the twelfth line is used for connecting a fourth load; the ninth line, the tenth line, the eleventh line and the thirteenth line have equal electrical lengths and are 1/4 of the wavelength of the input signal, and the twelfth line has an electrical length of 1/2 of the wavelength of the input signal.
Specifically, the ninth line in the embodiment of the application is a hi section, the tenth line is an ij section, the eleventh line is a jk section, the twelfth line is a kl section, the thirteenth line is a hl section, and a closed 'mouth' -shaped structure is formed through end-to-end connection. The port h of the ninth line and the port j of the tenth line are used for receiving the intermediate signal, the port i is used for outputting the first combined signal, and the node l and the node k are used for respectively connecting a third load and a fourth load. It can be understood that in this embodiment, the second Gysel combining unit has a "mouth" structure, and the node l and the node k are directly connected to the third load and the fourth load. When the second Gysel combining unit is in a structure like a Chinese character 'ri', the node l and the node k are indirectly connected with the third load and the fourth load. The second Gysel combining unit may be made in the form of a microstrip line or an air strip line or the like.
In one embodiment, the second Gysel combining unit further comprises: a fourteenth line, a fifteenth line, and a sixteenth line, one end of the fourteenth line being connected to the thirteenth line, the other end of the fourteenth line being connected to one end of the fifteenth line and the third load, one end of the sixteenth line being connected to the eleventh line, the other end of the sixteenth line being connected to the other end of the fifteenth line and the fourth load; the fourteenth line and the sixteenth line have equal electrical lengths and are each 1/4 of the wavelength of the input signal, and the fifteenth line has an electrical length of 1/2 of the wavelength of the input signal.
Specifically, in the embodiment of the application, the fourteenth line is an lm segment, the fifteenth line is an mn segment, the sixteenth line is a kn segment, and the node m and the node n are directly connected with a third load and a fourth load respectively. In this embodiment, the second Gysel combining unit is in a "Chinese character 'ri' shaped structure, and in some other embodiments, the second Gysel combining unit may also be configured in a" Chinese character 'mu' shaped structure or the like.
In one embodiment, the impedance of the eleventh line, the impedance of the thirteenth line, the impedance of the fourteenth line, and the impedance of the sixteenth line are equal and are all input signal impedances, the total impedance of the ninth line and the tenth line beingMultiple input signal impedance. As a specific example, in some embodiments, the input signal impedance is 50Ω, zjk = Zhl = Zlm = Zkn =50Ω, zhi=zij=70.7Ω, and the twelfth line impedance Zkl and the fifteenth line impedance Zmn can be flexibly adjusted according to the required isolation and bandwidth.
Specifically, the structural arrangement and the working principle of the second Gysel combining unit in the embodiment of the present application are the same as those of the first Gysel combining unit, and are not described in detail herein. It can be understood that the two intermediate signals output by the two first Gysel combining units are synchronous signals, the third load and the fourth load do not absorb power, and the second Gysel combining unit can output the first combining signals without loss through mutual superposition and cancellation of signals under a normal working state, so that the power of the first combining signals is improved.
In one embodiment, the second combining module includes: the system comprises two signal coupling units and a third Gysel combining unit, wherein each signal coupling unit is used for coupling the first combined signal to obtain a coupled signal, and the third Gysel combining unit is used for combining the two coupled signals to obtain a second combined signal.
Specifically, in the embodiment of the application, through the two signal coupling units, a part of signals are respectively extracted from the signal main channel, namely, the first combined signal is extracted, so that the corresponding coupling signals are obtained. For example, as shown in fig. 3, the signal coupling unit is a coupling microstrip line, and the coupling microstrip line is formed by two parallel microstrip lines that are placed close to each other, so that the first combined signal can be coupled to obtain a corresponding coupling signal.
In one embodiment, the third Gysel combining unit includes: seventeenth, eighteenth, nineteenth, twentieth and twenty-first lines connected end to end in this order and forming a closed loop; one end of the seventeenth line is used for receiving the coupling signal, one end of the eighteenth line is used for receiving the coupling signal, the joint of the seventeenth line and the eighteenth line is used for outputting a second combined signal, the joint of the twentieth line and the twenty-first line is used for connecting a fifth load, and the joint of the nineteenth line and the twentieth line is used for connecting a sixth load; the seventeenth line, the eighteenth line, the nineteenth line and the twenty first line have equal electrical lengths and are each 1/4 of the wavelength of the input signal, and the twenty first line has an electrical length of 1/2 of the wavelength of the input signal.
Specifically, the seventeenth line in the embodiment of the application is an op section, the eighteenth line is a pq section, the nineteenth line is a qr section, the twentieth line is an rs section, the twentieth line is an os section, and a closed 'mouth' -shaped structure is formed through end-to-end connection. The port o of the seventeenth line and the port q of the eighteenth line are used for receiving the coupled signals, the port p is used for outputting a second combined signal, and the nodes s and r are used for connecting a fifth load and a sixth load respectively. It will be appreciated that in this embodiment, the third Gysel combining unit has a "mouth" structure, and the nodes s and r are directly connected to the fifth load and the sixth load. When the third Gysel combining unit is in a structure like a Chinese character 'ri', the node s and the node r are indirectly connected with the fifth load and the sixth load. The third Gysel combining unit may be made in the form of a microstrip line or an air strip line, etc.
In one embodiment, the third Gysel combining unit further comprises: a twenty-second line, a twenty-third line and a twenty-fourth line, wherein one end of the twenty-second line is connected with the twenty-first line, the other end of the twenty-second line is connected with one end of the twenty-third line and a fifth load, one end of the twenty-fourth line is connected with the nineteenth line, and the other end of the twenty-fourth line is connected with the other end of the twenty-third line and a sixth load; the twenty-second line and the twenty-fourth line have equal electrical lengths and are both 1/4 of the wavelength of the input signal, and the twenty-third line has an electrical length of 1/2 of the wavelength of the input signal.
Specifically, in the embodiment of the application, the twenty-second line is the st section, the twenty-third line is the tu section, the twenty-fourth line is the ru section, and the node t and the node u are directly connected with the fifth load and the sixth load respectively. In this embodiment, the third Gysel combining unit has a "ri" structure, and in some other embodiments, the third Gysel combining unit may also have a "mu" structure, and the like.
In one embodiment, the impedance of the nineteenth line, the twenty-first line, the twenty-second line, and the twenty-fourth line are equal and are all input signal impedances, the total impedance of the seventeenth line and the eighteenth line beingMultiple input signal impedance. As a specific example, in some embodiments, the input signal impedance is 50Ω, zqr = Zos =zst= Zru =50Ω, zop = Zpq =70.7Ω, and the impedance Zrs of the twentieth line and the impedance Ztu of the twenty-third line can be flexibly adjusted according to the required isolation and bandwidth.
Specifically, the structural arrangement and the working principle of the third Gysel combining unit in the embodiment of the present application are the same as those of the first Gysel combining unit, and are not described in detail herein. It can be understood that the two first combining signals output by the two second Gysel combining units are synchronous signals, the two corresponding coupling signals are also synchronous signals, the fifth load and the sixth load do not absorb power, and the third Gysel combining unit can output the second combining signals without loss through mutual superposition and cancellation of signals under the normal working state, so that the power of the second combining signals is improved. And under the condition that all the combining units are arranged as the Gysel combining units, the multipath same-frequency combiner of the embodiment of the application has a symmetrical structure, so the phase difference is smaller.
The following describes the multi-channel co-frequency combiner according to the embodiment of the present application in detail. The structure of the multipath same-frequency combiner is shown in fig. 3, and the multipath same-frequency combiner consists of seven Gysel networks with the same structure and two signal coupling units, wherein the two Gysel networks are all in a microstrip line form, the thickness of a printed board is 1.5 mm, and the dielectric constant is 2.65. The technical specifications of the multipath same-frequency combiner obtained through the setting are as follows: passband: 2200-3000MHz, insertion loss: less than or equal to 6.5dB, isolation more than or equal to 24dB, and output port coupling degree: 26+/-0.5 dB, phase difference less than or equal to 1 DEG and return loss more than or equal to 21dB.
Wherein, fig. 5 is a return loss simulation diagram, and the return loss in the range of 2200 to 3000MHz is greater than or equal to 21dB, which indicates that the matching degree of the ports is good; FIG. 6 is a schematic diagram of an isolation simulation, with an isolation greater than or equal to 24dB in the 2200 to 3000MHz range, illustrating less interaction between signal input ports; FIG. 7 is a schematic diagram of the coupling degree, in the range of 2200 to 3000MHz, with the coupling degree being 26+ -0.5 dB, illustrating the small fluctuation of the coupling degree; FIG. 8 is a schematic diagram of phase difference simulation, with phase differences in the 2200 to 3000MHz range being less than 1, illustrating the smaller phase differences at each input port; fig. 9 is a schematic diagram of insertion loss simulation, in which insertion loss is 6.5dB or less in the 2200 to 3000MHz range, indicating that the loss of power due to element insertion is small. Compared with the existing same-frequency combiner manufactured by using the annular bridge, the multi-channel same-frequency combiner improves the relative bandwidth from 6.1% to 30.7%, improves the power capacity by 2 times, and reduces the phase difference from less than or equal to 5 degrees to less than or equal to 1 degree, so that the eight-in three-out same-frequency combiner structure with wide passband, high power capacity and good amplitude consistency is realized.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "particular embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. A multipath co-frequency combiner, comprising:
each first combining module is used for combining input signals to obtain a first combined signal, and outputting the first combined signal from a first output port; the first combining module comprises at least one Gysel combining unit;
the second combining module is respectively connected with the two first combining modules, and is used for combining the two first combining signals to obtain a second combining signal and outputting the second combining signal from a second output port;
The first combining module includes: the device comprises two first Gysel combining units and a second Gysel combining unit, wherein each first Gysel combining unit is used for combining input signals to obtain intermediate signals, and the second Gysel combining unit is respectively connected with the two first Gysel combining units and combines the two intermediate signals to obtain the first combined signals;
The first Gysel combining unit comprises: the first circuit, the second circuit, the third circuit, the fourth circuit and the fifth circuit are sequentially connected end to form a closed loop;
one end of the first circuit is used for receiving the input signal, one end of the second circuit is used for receiving the input signal, the junction of the first circuit and the second circuit is used for outputting the intermediate signal, the junction of the fourth circuit and the fifth circuit is used for connecting a first load, and the junction of the third circuit and the fourth circuit is used for connecting a second load;
The electrical lengths of the first circuit, the second circuit, the third circuit and the fifth circuit are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the fourth circuit is 1/2 of the wavelength of the input signal;
The first Gysel combining unit further comprises: a sixth line, a seventh line, and an eighth line, wherein one end of the sixth line is connected to the fifth line, the other end of the sixth line is connected to one end of the seventh line and the first load, one end of the eighth line is connected to the third line, and the other end of the eighth line is connected to the other end of the seventh line and the second load;
The electrical lengths of the sixth line and the eighth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the seventh line is 1/2 of the wavelength of the input signal.
2. The multiple on-channel combiner of claim 1, wherein the impedance of the third line, the impedance of the fifth line, the impedance of the sixth line, and the impedance of the eighth line are equal and are all input signal impedances, the total impedance of the first line and the second line isMultiple input signal impedance.
3. The multiple on-channel combiner of claim 1, wherein the second Gysel combining unit comprises: a ninth line, a tenth line, an eleventh line, a twelfth line, and a thirteenth line, which are connected end to end in order and form a closed loop;
one end of the ninth line is used for receiving the intermediate signal, one end of the tenth line is used for receiving the intermediate signal, a joint of the ninth line and the tenth line is used for outputting the first combined signal, a joint of the twelfth line and the thirteenth line is used for connecting a third load, and a joint of the eleventh line and the twelfth line is used for connecting a fourth load;
The electrical lengths of the ninth line, the tenth line, the eleventh line and the thirteenth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the twelfth line is 1/2 of the wavelength of the input signal.
4. The multi-path on-channel combiner of claim 3, wherein the second Gysel combining unit further comprises: a fourteenth line, a fifteenth line, and a sixteenth line, one end of the fourteenth line being connected to the thirteenth line, the other end of the fourteenth line being connected to one end of the fifteenth line and the third load, one end of the sixteenth line being connected to the eleventh line, the other end of the sixteenth line being connected to the other end of the fifteenth line and the fourth load;
the electrical lengths of the fourteenth line and the sixteenth line are equal and are 1/4 of the wavelength of the input signal, and the electrical length of the fifteenth line is 1/2 of the wavelength of the input signal.
5. The multiple on-channel combiner of claim 4, wherein the impedance of the eleventh line, the impedance of the thirteenth line, the impedance of the fourteenth line, and the impedance of the sixteenth line are equal and are all input signal impedances, the total impedance of the ninth line and the tenth line beingMultiple input signal impedance.
6. The multiple on-channel combiner of any one of claims 1-5, wherein the second combining module comprises: the system comprises two signal coupling units and a third Gysel combining unit, wherein each signal coupling unit is used for coupling the first combined signal to obtain a coupled signal, and the third Gysel combining unit is used for combining the two coupled signals to obtain the second combined signal.
7. The multiple on-channel combiner of claim 6, wherein the third Gysel combining unit comprises: a seventeenth line, an eighteenth line, a nineteenth line, a twentieth line, and a twentieth line, which are connected end to end in order and form a closed loop;
One end of the seventeenth line is used for receiving the coupling signal, one end of the eighteenth line is used for receiving the coupling signal, a joint of the seventeenth line and the eighteenth line is used for outputting the second combined signal, a joint of the twentieth line and the twenty first line is used for connecting a fifth load, and a joint of the nineteenth line and the twentieth line is used for connecting a sixth load;
the seventeenth line, the eighteenth line, the nineteenth line and the twenty first line have equal electrical lengths and are each 1/4 of the wavelength of the input signal, and the twentieth line has an electrical length of 1/2 of the wavelength of the input signal.
8. The multiple on-channel combiner of claim 7, wherein the third Gysel combining unit further comprises: a twenty-second line, a twenty-third line, and a twenty-fourth line, one end of the twenty-second line being connected to the twenty-first line, the other end of the twenty-second line being connected to one end of the twenty-third line and the fifth load, one end of the twenty-fourth line being connected to the nineteenth line, the other end of the twenty-fourth line being connected to the other end of the twenty-third line and the sixth load;
the twenty-second line and the twenty-fourth line have equal electrical lengths and are each 1/4 of the input signal wavelength, and the twenty-third line has an electrical length of 1/2 of the input signal wavelength.
9. The multiple on-channel combiner of claim 8, wherein the nineteenth line impedance, the twenty-first line impedance, the twenty-second line impedance, and the twenty-fourth line impedance are equal and are all input signal impedances, the seventeenth line and the eighteenth line total impedance beingMultiple input signal impedance.
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| CN114221103A (en) * | 2021-12-03 | 2022-03-22 | 江苏德是和通信科技有限公司 | 4-path power synthesizer with hot switching function and 4-path power synthesis method |
| CN114696055A (en) * | 2022-04-02 | 2022-07-01 | 京信射频技术(广州)有限公司 | Multi-path same-frequency combiner |
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| JP4874390B2 (en) * | 2007-04-16 | 2012-02-15 | 三菱電機株式会社 | Directional coupler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114221103A (en) * | 2021-12-03 | 2022-03-22 | 江苏德是和通信科技有限公司 | 4-path power synthesizer with hot switching function and 4-path power synthesis method |
| CN114696055A (en) * | 2022-04-02 | 2022-07-01 | 京信射频技术(广州)有限公司 | Multi-path same-frequency combiner |
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