Network matrix with 0-degree phase difference for non-equal power distribution

Abstract

The invention discloses a non-equal power distribution network matrix with 0-degree phase difference, comprising: an input port for receiving a radio frequency signal; the output port is used for feeding the radio frequency signal to the antenna unit; the coupler group is connected between the input port and the output port and is used for performing power distribution and phase adjustment on the input radio frequency signal; the phase shifter group is arranged in an output path of the coupler group and comprises a 0-degree phase shifter and a-90-degree phase shifter; and the nested switch is connected between the input port and the coupler group and is used for switching the input signal to different coupler paths and carrying out non-equal power distribution design. According to the invention, the non-equal power distribution design is realized by adding the nested switches, the Butler matrix which is simple in structure and has a 0-degree phase difference is obtained, and the dispersion phenomenon of the network is reduced and the working bandwidth of the network is improved by reducing the use types of the phase shifters.

Description

Technical Field

[0001] The present invention belongs to the field of wireless communications, and in particular relates to a network matrix with unequal power distribution and a 0-degree phase difference. Background Art

[0002] In the prior art, conventional Butler matrices are used to implement matrices with 4 inputs and 4 outputs, or 8 inputs and 8 outputs. Figure 1-2 As shown, there are four input ports on the left. When input from the four ports respectively, the four antenna ports on the right produce phase differences of ±45° and ±135°, thereby realizing four beam states.

[0003] Patent CN202110124322.7 designs a 7-input and 8-output Butler matrix that can generate seven phase difference states: ±135°, ±90°, ±45°, and 0°. In particular, the design of 0° phase difference makes up for the lack of 0° phase difference in traditional Butler matrix. However, in order to introduce the design of 0° phase difference, it is necessary to introduce equal power dividers on the basis of the two-layer Butler matrix, and feed the output signals of the equal power dividers into the next-level coupler respectively, such as Figure 3 shown.

[0004] It also includes a 5-input 8-output Butler matrix that produces five phase difference states: ±135°, ±45°, and 0°. However, an equal power divider must also be introduced to feed the output signals of the equal power divider into the next-stage coupler, such as Figure 4 shown.

[0005] The design of a minimum four-layer network (each layer passing through a 3dB / 90° coupler counts as one layer) increases the initial complexity of patent CN202110124322.7. In other words, this solution can only be increased, not reduced. In addition, the power allocation ratio of multiple output ports is the same, making it impossible to implement weighted processing of the array antenna.

[0006] Patent CN202110913758.4 provides a 3×3 Nolen matrix and designs a 3-input 4-output Nolen matrix that can produce three phase difference states of ±120° and 0°, such as Figure 5 As shown in Figure 2. Currently, Nolen matrix designs primarily focus on low-order matrices. High-order Nolen matrices capable of achieving more beams are rare and difficult to implement. Their design theory and methods are less mature than those of Butler matrices, potentially limiting their practical application. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a network matrix with unequal power distribution and a 0-degree phase difference, comprising:

[0008] Input port, used for receiving radio frequency signals;

[0009] an output port, configured to feed the radio frequency signal to an antenna unit;

[0010] a coupler group, connected between the input port and the output port, for performing power distribution and phase adjustment on the input radio frequency signal;

[0011] a phase shifter group, arranged in an output path of the coupler group, comprising a 0° phase shifter and a -90° phase shifter;

[0012] The nested switch is connected between the coupler group and the output port and is used to switch the output signals of different couplers to the output port to perform unequal power distribution design.

[0013] Preferably, the network matrix is a 3-input 3-output unequal power distribution network matrix with a 0-degree phase difference;

[0014] The input ports include a first input port, a second input port and a third input port;

[0015] The output ports include a first output port, a second output port, and a third output port.

[0016] Preferably, when a signal is input to the first input port, the output port generates a +90° phase difference, and the output power of the second output port is twice that of the first output port and the third output port.

[0017] Preferably, when a signal is input to the second input port, the output port generates a phase difference of -90°, and the output power of the second output port is twice that of the first output port and the third output port.

[0018] Preferably, when a signal is input to the third input port, the output port generates a 0° phase difference, and the output power of the second output port is twice that of the first output port and the third output port.

[0019] Preferably, when the input port inputs a signal, the phase difference generation rule includes:

[0020] When a signal is input to the first input port, the phase difference between the first output port and the second output port is +90°, and the phase difference between the second output port and the third output port is +90°;

[0021] When the second input port inputs a signal, the phase difference between the first output port and the second output port is -90°, and the phase difference between the second output port and the third output port is -90°;

[0022] When the third input port inputs a signal, the phase difference between the first output port and the second output port is 0°, and the phase difference between the second output port and the third output port is 0°.

[0023] Preferably, the second output port is directly connected to the input port without passing through the coupler group and the phase shifter group;

[0024] The signals of the first output port and the third output port are both subjected to power distribution by the coupler group and the phase shifter group.

[0025] Preferably, the coupler group includes at least one 3dB / 90° directional coupler;

[0026] The input end of the 3dB / 90° directional coupler is connected to the nested switch, and the output end is connected to the phase shifter group and the second output port respectively.

[0027] Preferably, the phase shifter group consists of a 0° phase shifter and a -90° phase shifter;

[0028] The 0° phase shifter is provided in the coupler output path corresponding to the second input port;

[0029] The -90° phase shifter is arranged in the coupler output path corresponding to the first input port and the third input port.

[0030] Preferably, the nested switch is a single-pole double-throw switch;

[0031] The common terminal of the nested switch is connected to the input port;

[0032] The switching end of the nested switch is connected to the input end of the coupler in the coupler group.

[0033] Compared with the prior art, the present invention has the following advantages and technical effects:

[0034] The present invention provides a 3-input 3-output unequal power distribution network matrix with a 0-degree phase difference. The unequal power distribution design is achieved by adding nested switches without introducing equal power distributors, thereby obtaining a Butler matrix with a simple structure and a 0-degree phase difference.

[0035] The present invention reduces the types of phase shifters used, thereby reducing the dispersion phenomenon of the network and improving the working bandwidth of the network.

[0036] The 3-input 3-output network matrix of the present invention can be used for feeding network support of a multi-beam array antenna, effectively reducing the side lobes of the array antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0038] Figure 1 This is a structural diagram of a 4-input 4-output Butler matrix according to the background technology of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of an 8-input and 8-output Butler matrix according to the background technology of the present invention;

[0040] Figure 3 This is a structural diagram of a 7-input and 8-output Butler matrix according to the background technology of the present invention;

[0041] Figure 4 This is a structural diagram of a 5-input and 8-output Butler matrix according to the background technology of the present invention;

[0042] Figure 5 This is a structural diagram of a 3-input 4-output Nolen matrix according to the background technology of the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of a network matrix with 3-input and 3-output unequal power distribution and a 0-degree phase difference according to an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the working structure of a 3-input 3-output network matrix when a signal is input to the first input port according to an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the working structure of a 3-input 3-output network matrix when a signal is input to the second input port of an embodiment of the present invention;

[0046] Figure 9 2 is a schematic diagram of the working structure of a 3-input 3-output network matrix when a signal is input to the third input port according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0049] Example 1

[0050] like Figure 6-9As shown, this embodiment provides a network matrix with unequal power distribution and a 0-degree phase difference, including:

[0051] Input port, used for receiving radio frequency signals;

[0052] An output port for feeding a radio frequency signal to an antenna unit;

[0053] A coupler group is connected between the input port and the output port and is used to distribute the power and adjust the phase of the input radio frequency signal;

[0054] a phase shifter group, arranged in an output path of the coupler group, comprising a 0° phase shifter and a -90° phase shifter;

[0055] Nested switches, connected between the input port and the coupler group, are used to switch the input signal to different coupler paths for unequal power distribution design.

[0056] Further, if Figure 6 As shown, the network matrix is a 3-input 3-output unequal power distribution network matrix with a 0-degree phase difference;

[0057] The input port includes a first input port, a second input port and a third input port;

[0058] The output ports include a first output port, a second output port, and a third output port.

[0059] Furthermore, when a signal is input to the first input port, a +90° phase difference is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

[0060] Furthermore, if Figure 7 As shown in the figure, when the input is at Input1, the three output ports have a +90° phase difference. Among them, the middle port Output2 does not pass through the coupler and no power is split, so its power is twice that of the other two output ports.

[0061] Furthermore, when a signal is input to the second input port, a phase difference of -90° is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

[0062] Furthermore, if Figure 8 As shown in the figure, when the input is at Input2, the three output ports generate a -90° phase difference. Among them, the middle port Output2 does not pass through the coupler and no power is split, so its power is twice that of the other two output ports.

[0063] Furthermore, when a signal is input to the third input port, a phase difference of 0° is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

[0064] Furthermore, if Figure 9 As shown in the figure, when the Input3 port is input, the three output ports produce a 0° phase difference. Among them, the middle port Output2 does not pass through the coupler and no power is split, so its power is twice that of the other two output ports.

[0065] Furthermore, when the input port inputs a signal, the phase difference generation rules include:

[0066] When a signal is input to the first input port, the phase difference between the first output port and the second output port is +90°, and the phase difference between the second output port and the third output port is +90°;

[0067] When the second input port inputs a signal, the phase difference between the first output port and the second output port is -90°, and the phase difference between the second output port and the third output port is -90°;

[0068] When the third input port inputs a signal, the phase difference between the first output port and the second output port is 0°, and the phase difference between the second output port and the third output port is 0°.

[0069] Furthermore, this embodiment generates three phase differences: ±90° and 0° when inputting from different input ports. However, regardless of the input port, the power at the center output port is twice that of the other two ports. This greater power at the center than at the two sides effectively reduces the sidelobes of the array antenna.

[0070] Furthermore, the second output port is directly connected to the input port without passing through the coupler group and the phase shifter group;

[0071] The signals of the first output port and the third output port are both subjected to power distribution by the coupler group and the phase shifter group.

[0072] Further, the coupler group includes at least one 3dB / 90° directional coupler;

[0073] The input end of the 3dB / 90° directional coupler is connected to the nested switch, and the output end is connected to the phase shifter group and the second output port respectively.

[0074] As an additional embodiment, the coupler group includes a first coupler and a second coupler, which are respectively connected to the output side of the nested switch, and the output ends of the first coupler and the second coupler are respectively connected to the first output port and the third output port;

[0075] The second output port is directly connected to the output side of the nested switch without passing through the coupler;

[0076] The power distribution ratio of the first coupler and the second coupler is 1:1, and the power of the second output port is twice the power of the first output port and the third output port;

[0077] The nested switches are configured to select signal paths based on the input ports such that:

[0078] When a signal is input to the first input port, the phase difference between the first output port and the second output port is +90°, and the phase difference between the second output port and the third output port is +90°;

[0079] When the second input port inputs a signal, the phase difference between the first output port and the second output port is -90°, and the phase difference between the second output port and the third output port is -90°;

[0080] When the third input port inputs a signal, the phase difference between the first output port and the second output port is 0°, and the phase difference between the second output port and the third output port is 0°.

[0081] To further optimize the solution, the number of couplers can be three, and signal transmission is achieved between the couplers through electrical connection.

[0082] Furthermore, the phase shifter group is composed of a 0° phase shifter and a -90° phase shifter;

[0083] A 0° phase shifter is provided in the coupler output path corresponding to the second input port;

[0084] The -90° phase shifter is arranged in the coupler output path corresponding to the first input port and the third input port.

[0085] As an additional implementation, a 0° phase shifter is provided in a path from the third input port to the second output port;

[0086] The -90° phase shifter is arranged in a path from the output ends of the first coupler and the second coupler to the first output port and the third output port.

[0087] The phase shifters in the 3-input 3-output network matrix of this embodiment include only two types of phase shifters: 0° and -90°, which can reduce the dispersion phenomenon of the network and increase the working bandwidth of the network.

[0088] Furthermore, the nested switch is a single-pole double-throw switch for controlling a signal transmission path;

[0089] The common terminal of the nested switch is connected to the input port;

[0090] The switching terminals of the nested switches are connected to the input terminals of the couplers in the coupler group.

[0091] As an additional embodiment, the nested switch includes a first switch unit and a second switch unit;

[0092] The first switch unit is connected between the first input port and the first coupler, and the second switch unit is connected between the second input port and the second coupler;

[0093] The third input port is directly connected to the second output port.

[0094] The first coupler and the second coupler are 3dB / 90° directional couplers, and the input end of the first coupler is connected to the first switch unit, and the input end of the second coupler is connected to the second switch unit.

[0095] As an additional implementation method, the path switching logic of the nested switch is:

[0096] When the first input port is activated, the first switch unit transmits the signal to the first coupler and the second switch unit is disconnected;

[0097] When the second input port is activated, the second switch unit transmits the signal to the second coupler, and the first switch unit is disconnected;

[0098] When the third input port is activated, both the first switch unit and the second switch unit are turned off.

[0099] As an additional implementation manner, the power distribution of the second output port is implemented by a bypass coupler, and the output signal of the second output port does not pass through the power divider.

[0100] This embodiment provides a 3-input 3-output unequal power distribution network matrix with a 0-degree phase difference. The unequal power distribution design is achieved by adding nested switches without introducing equal power distributors, resulting in a simple structure and a Butler matrix with a 0-degree phase difference.

[0101] This embodiment reduces the types of phase shifters used, thereby reducing the dispersion phenomenon of the network and improving the working bandwidth of the network.

[0102] The network matrix of this embodiment can be used to support the feed network of a multi-beam array antenna, effectively reducing the side lobes of the array antenna.

[0103] Example 2

[0104] This embodiment further discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the first embodiment.

[0105] Example 3

[0106] This embodiment further discloses a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first embodiment are implemented.

[0107] Example 4

[0108] This embodiment further discloses a computer program product, including a computer program, which implements the steps of the method described in the first embodiment when executed by a processor.

[0109] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A network matrix with unequal power distribution and 0-degree phase difference, characterized in that: include: Input port, used for receiving radio frequency signals; an output port, configured to feed the radio frequency signal to an antenna unit; a coupler group, connected between the input port and the output port, for performing power distribution and phase adjustment on the input radio frequency signal; a phase shifter group, arranged in an output path of the coupler group, comprising a 0° phase shifter and a -90° phase shifter; The nested switch is connected between the coupler group and the output port and is used to switch the output signals of different couplers to the output port to perform unequal power distribution design.

2. The network matrix with unequal power distribution and 0-degree phase difference according to claim 1, characterized in that: The network matrix is a 3-input 3-output unequal power distribution network matrix with a 0-degree phase difference; The input ports include a first input port, a second input port and a third input port; The output ports include a first output port, a second output port, and a third output port.

3. The network matrix with unequal power distribution and 0-degree phase difference according to claim 2, characterized in that: When a signal is input to the first input port, a +90° phase difference is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

4. The network matrix with unequal power distribution and 0-degree phase difference according to claim 2, characterized in that: When a signal is input to the second input port, a phase difference of -90° is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

5. The network matrix with unequal power distribution and 0-degree phase difference according to claim 2, characterized in that: When a signal is input to the third input port, a phase difference of 0° is generated at the output port, and the output power of the second output port is twice that of the first output port and the third output port.

6. The network matrix with unequal power distribution and 0-degree phase difference according to claim 1, characterized in that: When the input port inputs a signal, the phase difference generation rule includes: When a signal is input to the first input port, the phase difference between the first output port and the second output port is +90°, and the phase difference between the second output port and the third output port is +90°; When the second input port inputs a signal, the phase difference between the first output port and the second output port is -90°, and the phase difference between the second output port and the third output port is -90°; When the third input port inputs a signal, the phase difference between the first output port and the second output port is 0°, and the phase difference between the second output port and the third output port is 0°.

7. The network matrix with unequal power distribution and 0-degree phase difference according to claim 2, characterized in that: The second output port is directly connected to the input port without passing through the coupler group and the phase shifter group; The signals of the first output port and the third output port are both subjected to power distribution by the coupler group and the phase shifter group.

8. The network matrix with unequal power distribution and 0-degree phase difference according to claim 1, characterized in that: The coupler group includes at least one 3dB / 90° directional coupler; The input end of the 3dB / 90° directional coupler is connected to the nested switch, and the output end is connected to the phase shifter group and the second output port respectively.

9. The network matrix with unequal power distribution and 0-degree phase difference according to claim 1, characterized in that: The phase shifter group consists of a 0° phase shifter and a -90° phase shifter; The 0° phase shifter is provided in the coupler output path corresponding to the second input port; The -90° phase shifter is arranged in the coupler output path corresponding to the first input port and the third input port.

10. The network matrix with unequal power distribution and 0-degree phase difference according to claim 1, characterized in that: The nested switch is a single-pole double-throw switch; The common terminal of the nested switch is connected to the input port; The switching end of the nested switch is connected to the input end of the coupler in the coupler group.

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