Butler matrix of dual-beam antenna and dual-beam antenna

Abstract

The present invention provides a Butler matrix of a dual-beam antenna, including a first-stage bridge, a power division network, and a second-stage bridge, all of which adopt a gradient slot coupling structure of a multi-layer circuit board; the two output ends of the first-stage bridge are respectively connected to the input end of the power division network and / or the input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the input end of the second-stage bridge and / or directly connected to the radiating unit of the antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating unit of the antenna subarray; the signal forms a P-channel output signal through the output end of the first-stage bridge and / or the output end of the power division network; the P-channel output signal is grouped according to the power size and connected to the input end of the second-stage bridge or directly connected to the radiating unit of the antenna subarray. The present invention also provides a dual-beam antenna having the Butler matrix. Thereby, the power ratio of the output signal of the Butler matrix of the present invention has the characteristic of changing with the frequency.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile communication base station antennas, and in particular to a Butler matrix of a dual-beam antenna and the dual-beam antenna. Background Art

[0002] The current mobile communication network is gradually showing a development trend that 2G, 3G, 4G and 5G will coexist for a long time. The base station antenna field is facing major challenges in spectrum utilization, antenna sharing and antenna integration. In this context, multi-beam antennas have attracted much attention in the industry because they can improve network coverage and capacity without adding new spectrum and antenna resources, especially dual-beam antennas, triple-beam antennas and penta-beam antennas.

[0003] Compared with conventional single-beam antennas, the key component of multi-beam antennas is the multi-beam forming network. Existing technical solutions often use a Butler matrix with a constant power ratio. Since the array spacing of the antenna array is fixed, the electrical lengths corresponding to different frequencies are different, and the corresponding array factors are also different, resulting in a single-beam horizontal plane beamwidth range of the multi-beam antenna being too large. Taking a four-unit Butler matrix with a power ratio of about 1:4:4:1 as an example, the horizontal plane beamwidth of the corresponding dual-beam antenna at 1710MHz is about 43°, and the horizontal plane beamwidth at 2690MHz is about 22°.

[0004] Theoretically, the horizontal beam width of the dual-beam antenna should be converged to around 33° as much as possible. When its range is too large, it will cause coverage overlap and holes. For example, when the horizontal beam width of 1800MHz is too wide, the corresponding coverage range is too large, resulting in coverage overlap; when the horizontal beam width of 2600MHz is too narrow, the corresponding coverage range is too small, resulting in coverage holes. 2600MHz users fall back to 1800MHz, causing congestion in the 1800MHz network and affecting user experience.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the above-mentioned defects, the purpose of the present invention is to provide a Butler matrix of a dual-beam antenna and a dual-beam antenna, wherein the power ratio of the output signal has the characteristic of changing with the frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large, thereby making the horizontal plane beam width at the low end of the frequency band smaller and the horizontal plane beam width at the high end of the frequency band larger, thereby solving the problem of the existing Butler matrix power ratio being constant and the horizontal plane beam width range of the ultra-wideband dual-beam antenna being too large, resulting in coverage cross-zone and voids.

[0007] In order to achieve the above-mentioned object, the present invention provides a Butler matrix of a dual-beam antenna, comprising a first-stage bridge, at least one power division network and at least one second-stage bridge electrically connected in sequence, wherein the first-stage bridge and the second-stage bridge respectively have two input terminals and two output terminals, and the power division network comprises one input terminal and two output terminals; the first-stage bridge, the power division network and the second-stage bridge all adopt a gradient slot coupling structure of a multi-layer circuit board;

[0008] The two input ends of the first-stage bridge are input ends of the Barratt matrix, the two output ends of the first-stage bridge are respectively connected to the input end of the power division network and / or the input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the input end of the second-stage bridge and / or directly connected to the radiating elements of the antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating elements of the antenna subarray;

[0009] The signal passes through the output end of the first-stage bridge and / or the output end of the power division network to form P-path output signals, where P is greater than or equal to 3; after the P-path output signals are grouped according to power size, they are respectively connected to the input end of the second-stage bridge or directly connected to the radiating elements of the antenna subarray, and the output signals of the output end of the second-stage bridge are respectively connected to the radiating elements of the antenna subarray.

[0010] According to the Butler matrix of the present invention, the P output signals are divided into one group according to the two output signals with larger power and / or the two output signals with smaller power are divided into one group.

[0011] According to the Butler matrix of the present invention, the power ratio of the P-channel output signal varies with the frequency, and the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large; and / or

[0012] The power ratio of the P-channel output signal ranges from 1:1 to 1:15, and the slope is controllable.

[0013] According to the Butler matrix of the present invention, the first-stage bridge and the second-stage bridge are 3dB bridges; and / or

[0014] The operating frequency band of the Butler matrix is ​​1710-2690 MHz, and the horizontal plane beam width is 25-41°.

[0015] According to the Butler matrix of the present invention, the Butler matrix comprises a first-level bridge, a power division network and a second-level bridge electrically connected in sequence;

[0016] The two output ends of the first-stage bridge are respectively connected to the input end of the power division network and one input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the other input end of the second-stage bridge and a radiating element of an antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating elements of two antenna subarrays;

[0017] The signal passes through an output end of the first-stage bridge and two output ends of the power division network to form three output signals; the output signal of the first-stage bridge and the output signal with lower power in the power division network are combined and connected to the two input ends of the second-stage bridge, the output signals of the two output ends of the second-stage bridge are respectively connected to the radiation elements of two antenna subarrays, and the output signal with higher power in the power division network is directly connected to the radiation element of one antenna subarray; or

[0018] The signal passes through an output end of the first-stage bridge and two output ends of the power division network to form three output signals; the output signal of the first-stage bridge and the output signal with higher power in the power division network are combined and connected to the two input ends of the second-stage bridge, the output signals of the two output ends of the second-stage bridge are respectively connected to the radiation units of two antenna subarrays, and the output signal with lower power in the power division network is directly connected to the radiation unit of one antenna subarray.

[0019] According to the Butler matrix of the present invention, the Butler matrix comprises one first-level bridge, two power division networks and two second-level bridges electrically connected in sequence;

[0020] The two output ends of the first-stage bridge are respectively connected to the input ends of the two power division networks, the two output ends of the two power division networks are respectively connected to the two input ends of the two second-stage bridges, and the two output ends of the two second-stage bridges are respectively connected to the radiation elements of the four antenna subarrays;

[0021] The signal passes through the two output ends of the two power division networks to form four output signals respectively; the two output signals with smaller power in the two power division networks are connected to the two input ends of one second-stage bridge, and the two output signals with larger power in the two power division networks are connected to the two input ends of another second-stage bridge; the output signals of the two output ends of the two second-stage bridges are respectively connected to the radiation units of the four antenna subarrays.

[0022] According to the Butler matrix of the present invention, the gradient slot coupling structure of the multi-layer circuit board at least includes an upper circuit layer, a floor and a lower circuit layer connected in sequence; the upper circuit layer and the lower circuit layer are respectively provided with a gradient circuit, the floor is correspondingly provided with a gradient slot, and the two gradient circuits are both located in the gradient slot.

[0023] According to the Butler matrix of the present invention, the gradient lines and the gradient slots are wide in the middle and gradually narrow toward both ends.

[0024] According to the Butler matrix of the present invention, the gradient slotted coupling structure of the multilayer circuit board includes the upper circuit layer, the upper dielectric substrate, the floor, the adhesive layer, the lower dielectric substrate and the lower circuit layer connected in sequence.

[0025] The present invention also provides a dual-beam antenna comprising the Butler matrix.

[0026] The Butler matrix of the dual-beam antenna of the present invention includes a first-stage bridge, a power division network and a second-stage bridge, which are connected in sequence to form a network with two input signals and P output signals, and the P output signals are respectively connected to P radiation units of the antenna subarray. The first-stage bridge, the power division network and the second-stage bridge all adopt a multi-layer circuit board gradient deformation slot coupling structure. After passing through the first-stage bridge or the power division network, the signal is connected to the input end of the second-stage bridge in groups according to the power size or directly used as the output signal of the Butler matrix, thereby realizing ultra-wideband impedance matching, and at the same time making the signal coupling degree smaller and the slope controllable as the frequency increases, so that the power ratio of the P-path output signal has the characteristic of changing with the frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large, so that the horizontal plane beam width at the low end of the frequency band becomes smaller, and the horizontal plane beam width at the high end of the frequency band becomes larger, so as to solve the problem of the horizontal plane beam width range of the ultra-wideband dual-beam antenna being too large, resulting in coverage crossing and voids. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a Butler matrix of a dual-beam antenna in a first embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of the structure of a Butler matrix of a dual-beam antenna in a second embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of a preferred structure of a gradually deformed slotted coupling structure of a multi-layer circuit board of the present invention;

[0030] Figure 4 It is a schematic diagram of a preferred structure of the gradual deformation slot coupling structure of the present invention;

[0031] Figure 5 It is a power ratio diagram of a preferred embodiment of the Butler matrix of the present invention;

[0032] Figure 6 It is a horizontal plane directional diagram of a preferred embodiment of the Butler matrix of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that references to "one embodiment", "embodiment", "example embodiment", etc. in this specification refer to the embodiment described, which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

[0035] In addition, certain words are used in the specification and subsequent claims to refer to specific components or parts. Those with ordinary knowledge in the relevant field should understand that manufacturers can use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0036] The present invention provides a Butler matrix of a dual-beam antenna, comprising a first-stage bridge, at least one power division network and at least one second-stage bridge electrically connected in sequence, wherein the first-stage bridge and the second-stage bridge respectively comprise two input terminals and two output terminals, and the power division network is a one-to-two power division network, comprising one input terminal and two output terminals. The three are sequentially connected to form a network having two input signals and P output signals, and the P output signals are respectively connected to P radiation units of the dual-beam antenna subarray, wherein P≥3.

[0037] The two input ends of the first-stage bridge are the input ends of the Barratt matrix, the two output ends of the first-stage bridge are respectively connected to the input end of the power division network and / or the input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the input end of the second-stage bridge and / or directly connected to the radiating elements of the antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating elements of the antenna subarray.

[0038] The first-stage bridge, power division network and second-stage bridge all adopt the gradient slot coupling structure of the multi-layer circuit board. The signal forms a P-channel output signal after passing through the output end of the first-stage bridge and / or the output end of the power division network. After the P-channel output signal is grouped according to the power size, it is respectively connected to the input end of the second-stage bridge or directly connected to the radiation unit of the antenna subarray as the output signal of the Butler matrix. The output signal of the output end of the second-stage bridge is also respectively connected to the radiation unit of the antenna subarray. In this way, ultra-wideband impedance matching is achieved, and at the same time, the coupling degree of the signal decreases with the increase of frequency and the slope is controllable. Therefore, the power ratio of the P-channel output signal has the characteristic of changing with the frequency. Specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large, so that the horizontal plane beam width at the low end of the frequency band becomes smaller and the horizontal plane beam width at the high end of the frequency band becomes larger, so as to solve the problem of coverage crossing and void caused by the excessively large horizontal plane beam width range of the ultra-wideband dual-beam antenna.

[0039] Preferably, the P output signals are grouped into one group according to the two output signals with larger power and / or grouped into one group according to the two output signals with smaller power.

[0040] Preferably, the operating frequency band of the Butler matrix of the present invention is 1710-2690 MHz, and the horizontal plane beam width can be converged from 22-43° to 25-41°. The horizontal plane beam width is 25-41°.

[0041] Preferably, the power ratio of the P-channel output signal ranges from 1:1 to 1:15, and the slope is controllable.

[0042] Figure 1 It is a structural schematic diagram of the Butler matrix of the dual-beam antenna in the first embodiment of the present invention. The Butler matrix 100 includes a first-stage bridge 10, a power division network 20 and a second-stage bridge 30 electrically connected in sequence. The first-stage bridge 10 includes two input terminals 1, 2 and two output terminals 3, 4, the second-stage bridge 30 includes two input terminals and two output terminals, and the power division network 20 is a one-to-two power division network, including an input terminal and two output terminals. The first-stage bridge 10, the power division network 20 and the second-stage bridge 30 all adopt a gradient slot coupling structure of a multi-layer circuit board. Preferably, the first-stage bridge 10 and the second-stage bridge 30 are 3dB bridges. The output signal path number P of the Butler matrix 100 is 3.

[0043] The two input terminals 1 and 2 of the first-stage bridge 10 are the input terminals of the Barratt matrix 100, and the two output terminals 3 and 4 of the first-stage bridge 10 are respectively connected to the input terminal of the power division network 20 and one input terminal of the second-stage bridge 30, thereby forming three output signals 3, 5 and 6. The two output terminals of the power division network 20 are respectively connected to the other input terminal of the second-stage bridge 30 and the radiating element of an antenna subarray, and the two output terminals of the second-stage bridge 30 are respectively connected to the radiating elements of the two antenna subarrays.

[0044] The first form: the signal passes through an output end of the first-stage bridge 10 and two output ends of the power division network 20 to form three output signals 3, 5 and 6. The output signal 3 of the first-stage bridge 10 and the output signal 5 with lower power in the power division network 20 are combined and connected to the two input ends of the second-stage bridge 30. The two output ends of the second-stage bridge 30 form two output signals 7 and 8, which are respectively connected to the radiation units of the two antenna subarrays. The output signal 6 with higher power in the power division network 20 is directly connected to the radiation unit of one antenna subarray as one output signal of the Butler matrix 100. The three output signals 6, 7 and 8 are respectively connected to the input ends of the three radiation units of the dual-beam antenna subarray.

[0045] The second form: The signal passes through an output end of the first-stage bridge 10 and two output ends of the power division network 20 to form three output signals. The output signal of the first-stage bridge 10 and the output signal with higher power in the power division network 20 are combined and connected to the two input ends of the second-stage bridge 30. The output signals of the two output ends of the second-stage bridge 30 are respectively connected to the radiation units of the two antenna subarrays, and the output signal with lower power in the power division network 20 is directly connected to the radiation unit of one antenna subarray. The power ratio of the three output signals of the Butler matrix 100 changes with the frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large.

[0046] Preferably, the power ratio of the three output signals increases with increasing frequency and the slope is controllable, the power ratio range is 1:1-1:15, and the slope is controllable.

[0047] The present invention provides a Butler matrix 100 whose power ratio varies with frequency, so that the power at the low end of the frequency band is relatively small and the power at the high end of the frequency band is relatively large. Then, by changing the array factor, the horizontal plane beam width at the low end of the frequency band can be reduced and the horizontal plane beam width at the high end of the frequency band can be increased, thereby solving the problem in the prior art that the Butler matrix power ratio is constant and the horizontal plane beam width range of the ultra-wideband dual-beam antenna is too large, resulting in coverage cross-area and voids.

[0048] Figure 2It is a structural schematic diagram of the Butler matrix of the dual-beam antenna in the second embodiment of the present invention. The Butler matrix 100 includes a first-stage bridge 10, two power division networks 20 and two second-stage bridges 30 electrically connected in sequence. The first-stage bridge 10 includes two input terminals 1, 2 and two output terminals 3, 4, the second-stage bridge 30 includes two input terminals and two output terminals, and the power division network 20 is a one-to-two power division network, including an input terminal and two output terminals. The first-stage bridge 10, the power division network 20 and the second-stage bridge 30 all adopt a gradient slot coupling structure of a multi-layer circuit board. Preferably, the first-stage bridge 10 and the second-stage bridge 30 are 3dB bridges. The output signal path number P of the Butler matrix 100 is 4.

[0049] The two input terminals 1 and 2 of the first-stage bridge 10 are the input terminals of the Barratt matrix 100, and the two output terminals 3 and 4 of the first-stage bridge 10 are respectively connected to the input terminals of the two power division networks 20, thereby forming four output signals 5 to 8. The two output terminals of the two power division networks 20 are respectively connected to the two input terminals of the two second-stage bridges 30, and the two output terminals of the two second-stage bridges 30 are respectively connected to the radiation units of the four antenna subarrays.

[0050] Specifically, the signal passes through the two output ends of the two power division networks 20 to form four output signals 5 to 8, and then the four output signals 5 to 8 are grouped according to the power size. For example, the two output signals 7 and 8 with smaller power in the two power division networks 20 are connected to the two input ends of a second-stage bridge 30, and the two output signals 5 and 6 with larger power in the two power division networks 20 are connected to the two input ends of another second-stage bridge 30, thereby forming four output signals 9 and 10, 11 and 12, and the output signals 9 and 10, 11 and 12 at the two output ends of the two second-stage bridges 30 are respectively connected to the input ends of the radiation units of the four antenna subarrays. The power ratio of the four output signals of the Butler matrix 100 changes with the frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large.

[0051] Preferably, the power ratio of the four output signals increases with increasing frequency and the slope is controllable, the power ratio range is 1:1-1:15, and the slope is controllable.

[0052] Figure 3 The diagram is a preferred structural diagram of the multi-layer circuit board's gradient slot coupling structure of the present invention. The Butler matrix 100 is etched on the circuit board, and its cross section is a multi-layer structure. The first-level bridge 10, the power division network 20, and the second-level bridge 30 of the Butler matrix 100 all adopt the gradient slot coupling structure of the multi-layer circuit board. The gradient slot coupling structure of the multi-layer circuit board at least includes an upper circuit layer 21, a floor 23, and a lower circuit layer 26 connected in sequence. Figure 4As shown, the upper circuit layer 21 and the lower circuit layer 26 are respectively provided with a gradient circuit 211 and 261, and the floor 23 is correspondingly provided with a gradient slot 231, and the two gradient circuits 211 and 261 are both located in the gradient slot 231. The gradient circuits 211 and 261 and the gradient slot 231 are wide in the middle and gradually narrow toward both ends. By providing the gradient slot 231 on the floor 23 and the gradient circuits 211 and 261 on the upper circuit layer 21 and the lower circuit layer 26, the Butler matrix 100 can achieve ultra-wideband impedance matching, while making the signal coupling degree smaller as the frequency increases and the slope controllable.

[0053] Preferably, the multi-layer circuit board has a gradient slotted coupling structure including an upper circuit layer 21, an upper dielectric substrate 22, a floor 23, an adhesive layer 24, a lower dielectric substrate 25 and a lower circuit layer 26 connected in sequence. The circuits of the upper circuit layer 21 and the lower circuit layer 26 share the floor 23. The material of the adhesive layer 24 can be PP (polypropylene), and the process is high-temperature bonding. The Butler matrix 100 of the present invention has the characteristics of flexible routing and high processing accuracy.

[0054] Figure 5 A power ratio diagram of a preferred embodiment of the Butler matrix of the present invention, wherein the power ratio of the four output signals of the Butler matrix varies with frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large, wherein the power ratio of 1710MHz is approximately 1:2.5:2.5:1, and the power ratio of 2690MHz is approximately 1:6:6:1.

[0055] Figure 6 The horizontal plane radiation pattern of a preferred embodiment of the Butler matrix of the present invention is that the horizontal plane beam width of the dual-beam antenna of the Butler matrix converges, specifically 25-41° in the range of 1710-2690MHz.

[0056] The present invention also provides a dual-beam antenna including the Butler matrix 100 .

[0057] In summary, the Butler matrix of the dual-beam antenna of the present invention includes a first-stage bridge, a power division network and a second-stage bridge, which are connected in sequence to form a network with two input signals and P output signals, and the P output signals are respectively connected to the P radiation units of the antenna subarray. The first-stage bridge, the power division network and the second-stage bridge all adopt a multi-layer circuit board gradient slot coupling structure. After passing through the first-stage bridge or the power division network, the signal is connected to the input end of the second-stage bridge in groups according to the power size or directly used as the output signal of the Butler matrix, thereby realizing ultra-wideband impedance matching, and at the same time making the signal coupling degree smaller and the slope controllable as the frequency increases, so that the power ratio of the P-path output signal has the characteristic of changing with the frequency, specifically, the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large, so that the horizontal plane beam width at the low end of the frequency band becomes smaller, and the horizontal plane beam width at the high end of the frequency band becomes larger, so as to solve the problem of the horizontal plane beam width range of the ultra-wideband dual-beam antenna being too large, resulting in coverage crossing and voids.

[0058] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A Butler matrix of dual beam antenna, It is characterized in that The invention comprises a first-stage bridge, at least one power division network and at least one second-stage bridge which are electrically connected in sequence, wherein the first-stage bridge and the second-stage bridge respectively have two input terminals and two output terminals, and the power division network comprises one input terminal and two output terminals; the first-stage bridge, the power division network and the second-stage bridge all adopt a gradient slot coupling structure of a multi-layer circuit board; The two input ends of the first-stage bridge are input ends of the Barratt matrix, the two output ends of the first-stage bridge are respectively connected to the input end of the power division network and / or the input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the input end of the second-stage bridge and / or directly connected to the radiating elements of the antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating elements of the antenna subarray; The signal passes through the output end of the first-stage bridge and / or the output end of the power division network to form a P-channel output signal, where P is greater than or equal to 3; The P-channel output signals are grouped according to power and are respectively connected to the input end of the second-stage bridge or directly connected to the radiating elements of the antenna subarray, and the output signals of the output end of the second-stage bridge are respectively connected to the radiating elements of the antenna subarray; The multi-layer circuit board's gradient slot coupling structure comprises at least an upper circuit layer, a floor and a lower circuit layer connected in sequence; the upper circuit layer and the lower circuit layer are respectively provided with a gradient circuit, the floor is provided with a gradient slot, and the two gradient circuits are both located in the gradient slots; The gradually deformed line and the gradually deformed slot are wide in the middle and gradually narrow toward both ends.

2. According to the Butler Matrix of claim 1, It is characterized in that The P output signals are grouped into one group according to the two output signals with larger power and / or grouped into one group according to the two output signals with smaller power.

3. According to the Butler Matrix of claim 1, It is characterized in that The power ratio of the P-channel output signal varies with the frequency, and the power at the low end of the frequency band is relatively small, and the power at the high end of the frequency band is relatively large; and / or The power ratio of the P-channel output signal ranges from 1:1 to 1:15, and the slope is controllable.

4. According to the Butler Matrix of claim 1, It is characterized in that The first-stage bridge and the second-stage bridge are 3dB bridges; and / or The operating frequency band of the Butler matrix is ​​1710-2690 MHz, and the horizontal plane beam width is 25-41°.

5. The Butler Matrix according to claim 1, It is characterized in that It includes a first-stage bridge, a power division network and a second-stage bridge which are electrically connected in sequence; The two output ends of the first-stage bridge are respectively connected to the input end of the power division network and one input end of the second-stage bridge, the two output ends of the power division network are respectively connected to the other input end of the second-stage bridge and a radiating element of an antenna subarray, and the two output ends of the second-stage bridge are respectively connected to the radiating elements of two antenna subarrays; The signal passes through an output end of the first-stage bridge and two output ends of the power division network to form three output signals; the output signal of the first-stage bridge and the output signal with lower power in the power division network are combined and connected to two input ends of the second-stage bridge, the output signals of the two output ends of the second-stage bridge are respectively connected to the radiation units of two antenna subarrays, and the output signal with higher power in the power division network is directly connected to the radiation unit of one antenna subarray; or The signal passes through an output end of the first-stage bridge and two output ends of the power division network to form three output signals; the output signal of the first-stage bridge and the output signal with higher power in the power division network are combined and connected to the two input ends of the second-stage bridge, the output signals of the two output ends of the second-stage bridge are respectively connected to the radiation units of two antenna subarrays, and the output signal with lower power in the power division network is directly connected to the radiation unit of one antenna subarray.

6. The Butler Matrix according to claim 1, It is characterized in that comprising one first-stage bridge, two power division networks and two second-stage bridges electrically connected in sequence; The two output ends of the first-stage bridge are respectively connected to the input ends of the two power division networks, the two output ends of the two power division networks are respectively connected to the two input ends of the two second-stage bridges, and the two output ends of the two second-stage bridges are respectively connected to the radiation elements of the four antenna subarrays; The signal passes through the two output ends of the two power division networks to form four output signals respectively; the two output signals with smaller power in the two power division networks are connected to the two input ends of one second-stage bridge, and the two output signals with larger power in the two power division networks are connected to the two input ends of another second-stage bridge; the output signals of the two output ends of the two second-stage bridges are respectively connected to the radiation units of the four antenna subarrays.

7. The Butler Matrix according to claim 1, It is characterized in that The gradient slotted coupling structure of the multi-layer circuit board comprises the upper circuit layer, the upper dielectric substrate, the floor, the adhesive layer, the lower dielectric substrate and the lower circuit layer which are connected in sequence.

8. A dual-beam antenna comprising the Butler matrix according to any one of claims 1 to 7.

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