A non-equal power distribution network matrix with 0 degree phase difference

Abstract

The application discloses a non-equal-power distribution network matrix with 0-degree phase difference, which comprises an input port for receiving radio frequency signals, an output port for feeding the radio frequency signals to an antenna unit, a coupler group connected between the input port and the output port and used for power distribution and phase adjustment of the input radio frequency signals, a phase shifter group arranged in an output path of the coupler group and comprising a 0-degree phase shifter and a -90-degree phase shifter, and a nested switch connected between the input port and the coupler group and used for switching the input signals to different coupler paths for non-equal-power distribution design. The application realizes the non-equal-power distribution design by adding the nested switch, obtains a Butler matrix with simple structure and 0-degree phase difference, reduces the types of phase shifters, and further reduces the dispersion phenomenon of the network, thereby improving the working bandwidth of the network.

Description

Technical Field

[0001] This invention belongs to the field of wireless communication, and particularly relates to a network matrix with a non-equal power distribution and a 0-degree phase difference. Background Technology

[0002] In existing technologies, conventional Butler matrices are used to implement matrices with 4 inputs and 4 outputs, or 8 inputs and 8 outputs, etc. For example... Fig. 1-2 As shown, there are four input ports on the left. When input is received from the four ports, the four antenna ports on the right generate a phase difference of ±45° and ±135°, thereby realizing four beam states.

[0003] Patent CN202110124322.7 designs a 7-input 8-output Butler matrix capable of generating seven phase difference states: ±135°, ±90°, ±45°, and 0°. The 0° phase difference design, in particular, overcomes the limitation of traditional Butler matrices lacking this capability. However, to incorporate the 0° phase difference design, an equal power divider needs to be introduced on top of the two-layer Butler matrix. The output signals of the equal power divider are then fed into the next stage coupler, such as... Fig. 3 As shown.

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

[0005] The design of a minimum of four-layer network (each layer is counted as one through a 3dB / 90° coupler) increases the initial complexity of patent CN202110124322.7. In other words, this scheme can only be increased, not decreased. Furthermore, since all output ports have the same power allocation ratio, weighted processing of the array antennas cannot be implemented.

[0006] Patent CN202110913758.4 provides a 3×3 Nolen matrix and designs a 3-input 4-output Nolen matrix that can generate three phase difference states: ±120°, 0°, etc. Fig. 5 As shown. Current designs for Nolen matrices mainly focus on low-order matrices; designs for high-order Nolen matrices capable of achieving more beams are rare and quite difficult to implement. Their design theory and methods are less mature than those for Butler matrices, which may limit their practical applications. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a network matrix with a non-equal power allocation and a 0-degree phase difference, comprising:

[0008] input ports for receiving radio frequency signals;

[0009] output ports for feeding the radio frequency signals to antenna elements;

[0010] a coupler group connected between the input ports and the output ports for power dividing and phase adjusting the input radio frequency signals;

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

[0012] a nested switch connected between the coupler group and the output ports for switching different coupler output signals to the output ports for non-equal power dividing design.

[0013] Preferably, the network matrix is a 3-in 3-out non-equal power dividing network matrix with 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 the first input port inputs a signal, the output ports generate 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 the second input port inputs a signal, the output ports generate 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.

[0018] Preferably, when the third input port inputs a signal, the output ports generate 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 ports input signals, the phase difference generation rule includes:

[0020] When the first 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°;

[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 input signal, the phase difference of the first output port and the second output port is 0°, and the phase difference of the second output port and the third output port is 0°.

[0023] Preferably, the second output port is directly connected with 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 comprises at least one 3dB / 90° directional coupler.

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

[0027] Preferably, the phase shifter group is composed of a 0° phase shifter and a -90° phase shifter.

[0028] The 0° phase shifter is arranged on the coupler output path corresponding to the second input port.

[0029] The -90° phase shifter is arranged on 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 end of the nested switch is connected with the input port.

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

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

[0034] The present application provides a 3-in-3-out non-equal power distribution network matrix with 0° phase difference, which realizes non-equal power distribution design by increasing the nested switch, does not need to introduce an equal power distributor, and obtains a simple structure and a Butler matrix with 0° phase difference.

[0035] The present application reduces the network dispersion phenomenon by reducing the types of phase shifters, and improves the working bandwidth of the network.

[0036] The 3-in-3-out network matrix of the present application can be used for the feed network support of a multi-beam array antenna, and effectively reduces the sidelobe of the array antenna. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The illustrative embodiments of the application, and their description, are used to explain the application and do not constitute any improper limitation of the application. In the drawings:

[0038] Fig. 1 Structure diagram of 4-in 4-out Butler matrix as background art of the present application;

[0039] Fig. 2 Structure diagram of 8-in 8-out Butler matrix as background art of the present application;

[0040] Fig. 3 Structure diagram of 7-in 8-out Butler matrix as background art of the present application;

[0041] Fig. 4 Structure diagram of 5-in 8-out Butler matrix as background art of the present application;

[0042] Fig. 5 Structure diagram of 3-in 4-out Nolen matrix as background art of the present application;

[0043] Fig. 6 Structure diagram of 3-in 3-out network matrix with 0-degree phase difference and non-equal power distribution as an embodiment of the present application;

[0044] Fig. 7 Structure diagram of 3-in 3-out network matrix when the first input port inputs a signal as an embodiment of the present application;

[0045] Fig. 8 Structure diagram of 3-in 3-out network matrix when the second input port inputs a signal as an embodiment of the present application;

[0046] Fig. 9 Structure diagram of 3-in 3-out network matrix when the third input port inputs a signal as an embodiment of the present application. DETAILED DESCRIPTION

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. 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 flowchart of the accompanying drawings can be executed in a computer system such as a group of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0049] Embodiment One

[0050] As Fig. 6-9As shown, this embodiment provides a network matrix with a non-equal power allocation and a 0-degree phase difference, including:

[0051] Input port, used to receive radio frequency signals;

[0052] The output port is used to feed radio frequency signals to the antenna unit;

[0053] Coupler array, connected between input and output ports, is used for power distribution and phase adjustment of the input RF signal;

[0054] The phase shifter group, located in the output path of the coupler group, includes 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 non-equal power distribution design.

[0056] Furthermore, such as Fig. 6 As shown, the network matrix is ​​a 3-input 3-output non-equal power distribution network matrix with a 0-degree phase difference;

[0057] The input ports include 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, the output port generates a +90° phase difference, and the output power of the second output port is twice that of the first and third output ports.

[0060] Furthermore, such as Fig. 7 As shown, when Input1 is input, the three output ports generate a +90° phase difference. Among them, the middle port Output2 does not go through a coupler and does not undergo power distribution, therefore it has twice the power of the other two output ports.

[0061] Furthermore, when a signal is input to the second 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 and third output ports.

[0062] Furthermore, such as Fig. 8 As shown, when Input2 is input, the three output ports generate a -90° phase difference. The middle output port, Output2, does not pass through a coupler and therefore does not undergo power distribution, thus having twice the power of the other two output ports.

[0063] Further, when the third input port inputs a signal, 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.

[0064] Further, as shown in FIG. 3, when the Input3 port inputs a signal, the three output ports generate a 0° phase difference. Among them, the middle port Output2 does not pass through the coupler and does not perform power distribution, and thus has a power that is twice that of the other two output ports. Fig. 9

[0065] Further, when the input port inputs a signal, the generation rule of the phase difference includes:

[0066] When the first 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°.

[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] Further, in the embodiment, when different input ports enter, three kinds of phase differences of ±90° and 0° are generated, but no matter which port inputs, the power of the middle output port is twice that of the other two ports. The middle power is greater than the power of the two sides, which can effectively reduce the sidelobe of the array antenna.

[0070] Further, 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 both pass through the coupler group and the phase shifter group for power distribution.

[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 respectively connected to the phase shifter group and the second output port.

[0074] As an embodiment that can be added, 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 with 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 switch is configured to select a signal path according to an input port, so that:

[0078] When the first 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°;

[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] Further optimization scheme, the number of couplers can also be 3, and the signal transmission is realized through electrical connection between the couplers.

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

[0083] The 0° phase shifter is arranged in the output path of the coupler corresponding to the second input port;

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

[0085] As an embodiment that can be added, the 0° phase shifter is arranged in the path from the third input port to the second output port;

[0086] The -90° phase shifter is arranged in the path from the output 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 the embodiment only include 0° and -90° phase shifters, which can reduce the dispersion phenomenon of the network and improve the working bandwidth of the network.

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

[0089] The common end of the nested switch is connected with the input port;

[0090] The switching end of the nested switch is connected with the input end of the coupler in the coupler group.

[0091] As an additional embodiment, the nested switch comprises 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 with the first switch unit, and the input end of the second coupler is connected with the second switch unit.

[0095] As an additional embodiment, the path switching logic of the nested switch is as follows:

[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, the first switch unit and the second switch unit are both disconnected.

[0099] As an additional embodiment, the power distribution of the second output port is realized through a bypass coupler, and the output signal of the second output port does not pass through the power distributor.

[0100] The embodiment provides a 3-in-3-out non-equal power distribution network matrix with 0-degree phase difference, realizes the non-equal power distribution design by increasing the nested switch, does not need to introduce an equal power distributor, and obtains a Butler matrix with a simple structure and 0° phase difference.

[0101] The embodiment reduces the dispersion phenomenon of the network by reducing the types of phase shifters, and improves the working bandwidth of the network.

[0102] The network matrix of the embodiment can be used for supporting a feed network of a multi-beam array antenna, and effectively reduces the sidelobe of the array antenna.

[0103] Embodiment two

[0104] The embodiment further discloses a computer device, which comprises a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to realize the steps of the method in the embodiment one.

[0105] Embodiment three

[0106] The embodiment also discloses a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the method in the embodiment one.

[0107] Embodiment four

[0108] The embodiment also discloses a computer program product, which comprises a computer program, and the computer program is executed by a processor to realize the steps of the method in the embodiment one.

[0109] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A non-equal power distribution network matrix with 0 degree phase difference, characterized in that, The network matrix comprises: an input port for receiving a radio frequency signal; an output port for feeding the radio frequency signal to an antenna unit; a coupler group connected between the input port and the output port for power distribution and phase adjustment of 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; a nested switch connected between the coupler group and the output port for switching different coupler output signals to the output port for non-equal power distribution design; the nested switch is a single-pole double-throw switch.

2. The non-equal power distribution network matrix with 0 degree phase difference according to claim 1, wherein: the network matrix is a 3-in 3-out non-equal power distribution network matrix with 0 degree phase difference; the input port comprises a first input port, a second input port and a third input port; the output port comprises a first output port, a second output port and a third output port.

3. The non-equal power distribution network matrix with 0 degree phase difference according to claim 2, wherein: when the first input port inputs a signal, 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.

4. The non-equal power distribution network matrix with 0 degree phase difference according to claim 2, wherein: when the second input port inputs a signal, 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.

5. The non-equal power distribution network matrix with 0 degree phase difference according to claim 2, wherein: when the third input port inputs a signal, 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.

6. The non-equal power distribution network matrix with 0 degree phase difference according to claim 1, wherein: when the input port inputs a signal, the generation rule of the phase difference comprises: when the first 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 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 non-equal power distribution network matrix with 0 degree phase difference according to claim 2, wherein: 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 non-equal power distribution network matrix with 0 degree phase difference of claim 1, wherein, the coupler group comprises at least one 3dB / 90° directional coupler; an input end of the 3dB / 90° directional coupler is connected with the nested switch, and an output end is connected with the phase shifter group and the second output port respectively.

9. The non-equal power distribution network matrix with 0 degree phase difference of claim 1, wherein, the phase shifter group is composed of a 0° phase shifter and a -90° phase shifter; the 0° phase shifter is arranged on the coupler output path corresponding to the second input port; the -90° phase shifter is arranged on the coupler output path corresponding to the first input port and the third input port.

10. The non-equal power distribution network matrix with 0 degree phase difference of claim 1, wherein, a common end of the nested switch is connected with the input port; a switching end of the nested switch is connected with an input end of the coupler in the coupler group.

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