CN112636008A - Butler matrix of dual-beam antenna and dual-beam antenna - Google Patents
Butler matrix of dual-beam antenna and dual-beam antenna Download PDFInfo
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Abstract
The invention provides a butler matrix of a dual-beam antenna, which comprises a first-stage electric bridge, a power distribution network and a second-stage electric bridge, wherein the first-stage electric bridge, the power distribution network and the second-stage electric bridge all adopt a gradient slotted coupling structure of a multilayer circuit board; two output ends of the first-stage bridge are respectively connected with the input end of the power distribution network and/or the input end of the second-stage bridge, two output ends of the power distribution network are respectively connected with the input end of the second-stage bridge and/or directly connected with the radiation units of the antenna subarray, and two output ends of the second-stage bridge are respectively connected with the radiation units of the antenna subarray; the signal forms P-path output signals through the output end of the first-stage electric bridge and/or the output end of the power dividing network; after being grouped according to the power, the P paths of output signals are connected to the input end of the second-stage bridge or directly connected with the radiating unit of the antenna subarray. The invention also provides a dual-beam antenna with the Butler matrix. Therefore, the power ratio of the output signals of the Butler matrix has the characteristic of changing along with the frequency change.
Description
Technical Field
The invention relates to the technical field of mobile communication base station antennas, in particular to a Butler matrix of a dual-beam antenna and the dual-beam antenna.
Background
Currently, mobile communication networks gradually present the development trend that 2G, 3G, 4G and 5G will coexist for a long time, and the field of base station antennas faces significant challenges in terms of spectrum utilization, skyward sharing and antenna integration. Under such a large background, the multi-beam antenna is emphasized in the industry by the feature that it can improve the network coverage and capacity without adding new spectrum and sky resources, especially a dual-beam antenna, a triple-beam antenna and a five-beam antenna.
Compared with the conventional single-beam antenna, the key component added to the multi-beam antenna is the multi-beam forming network. In the prior art, a butler matrix with a constant power ratio is often used, and 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, the range of the horizontal beam width of a single beam of the multi-beam antenna is too large, and taking a four-unit butler matrix with a power ratio of about 1:4:4:1 as an example, the horizontal beam width of 1710MHz corresponding to the dual-beam antenna is about 43 °, and the horizontal beam width of 2690MHz is about 22 °.
Theoretically, the horizontal plane beam width of the dual-beam antenna should be as converged near 33 ° as much as possible, and when the range is too large, coverage area and holes are caused, for example, when the horizontal plane beam width of 1800MHz is too wide, the corresponding coverage area is too large, so that coverage area is caused; when the horizontal wave width of 2600MHz is too narrow, the corresponding coverage range is too small, which results in a coverage hole, and the 2600MHz user falls back to 1800MHz, which causes 1800MHz network congestion and affects user experience.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object 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 output signals of the dual-beam antenna has a characteristic of changing with frequency changes, specifically, the power at the low end of a frequency band is relatively low, and the power at the high end of the frequency band is relatively high, so that the horizontal plane beam width at the low end of the frequency band is reduced, and the horizontal plane beam width at the high end of the frequency band is increased, thereby solving the problems of coverage cross-areas and voids caused by the constant power ratio of the butler matrix and the excessively large horizontal plane beam width range of.
In order to achieve the above object, the present invention provides a butler matrix of a dual-beam antenna, including a first-stage bridge, at least one power dividing network and at least one second-stage bridge which are electrically connected in sequence, where the first-stage bridge and the second-stage bridge have two input ends and two output ends respectively, and the power dividing network includes one input end and two output ends; the first-stage electric bridge, the power distribution network and the second-stage electric bridge all adopt a gradually-changed slotted coupling structure of a multilayer circuit board;
two input ends of the first-stage bridge are input ends of a butler matrix, two output ends of the first-stage bridge are respectively connected with the input end of the power distribution network and/or the input end of the second-stage bridge, two output ends of the power distribution network are respectively connected with the input end of the second-stage bridge and/or directly connected with the radiation units of the antenna subarray, and two output ends of the second-stage bridge are respectively connected with the radiation units of the antenna subarray;
the signal passes through the output end of the first-stage electric bridge and/or the output end of the power dividing network to form P paths of output signals, wherein P is more than or equal to 3; after being grouped according to the power, the P paths of output signals are respectively connected to the input end of the second-stage bridge or directly connected with the radiation units of the antenna subarray, and the output signals of the output end of the second-stage bridge are respectively connected with the radiation units of the antenna subarray.
According to the butler matrix, 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.
According to the Butler matrix, the power ratio of the P paths of output signals changes along with the frequency change, the power of the low end of a frequency band is small, and the power of the high end of the frequency band is large; and/or
The power ratio range of the P paths of output signals is 1:1-1:15, and the slope is controllable.
According to the butler matrix of the present invention, the first stage bridge and the second stage bridge are 3dB bridges; and/or
The working frequency band of the Butler matrix is 1710-2690MHz, and the horizontal beam width is 25-41 degrees.
The Butler matrix comprises the first-stage electric bridge, the power dividing network and the second-stage electric bridge which are electrically connected in sequence;
two output ends of the first-stage bridge are respectively connected to an input end of the power distribution network and an input end of the second-stage bridge, two output ends of the power distribution network are respectively connected to the other input end of the second-stage bridge and a radiation unit of one antenna sub-array, and two output ends of the second-stage bridge are respectively connected with the radiation units of the two antenna sub-arrays;
the signal passes through one output end of the first-stage bridge and two output ends of the power dividing network to form three paths of output signals; the output signal of the first-stage electric bridge and the output signal with lower power in the power distribution network are combined and connected to two input ends of the second-stage electric bridge, the output signals of two output ends of the second-stage electric bridge are respectively connected with the radiation units of two antenna sub-arrays, and the output signal with higher power in the power distribution network is directly connected with the radiation unit of one antenna sub-array; or
The signal passes through one output end of the first-stage bridge and two output ends of the power dividing network to form three paths of output signals; the output signal of the first-stage electric bridge and the output signal with higher power in the power distribution network are combined and connected to two input ends of the second-stage electric bridge, the output signals of two output ends of the second-stage electric bridge are respectively connected with the radiation units of two antenna sub-arrays, and the output signal with lower power in the power distribution network is directly connected with the radiation unit of one antenna sub-array.
The Butler matrix comprises the first-stage electric bridge, the two power dividing networks and the two second-stage electric bridges which are electrically connected in sequence;
two output ends of the first-stage bridge are respectively connected to input ends of the two power distribution networks, two output ends of the two power distribution networks are respectively connected to two input ends of the two second-stage bridges, and two output ends of the two second-stage bridges are respectively connected with radiating units of four antenna sub-arrays;
the signal passes through two output ends of the two power division networks to form four paths of output signals respectively; two paths of output signals with lower power in the two power division networks are connected to two input ends of one second-stage bridge, and two paths of output signals with higher power in the two power division networks are connected to two input ends of the other second-stage bridge; and output signals of two output ends of the two second-stage bridges are respectively connected with the radiating units of the four antenna sub-arrays.
According to the Butler matrix, the gradually-changed slotted coupling structure of the multilayer circuit board at least comprises an upper circuit layer, a floor and a lower circuit layer which are sequentially connected; the floor is characterized in that the upper layer circuit layer and the lower layer circuit layer are respectively and correspondingly provided with a gradual change circuit, the floor is correspondingly provided with gradual change slots, and the two gradual change circuits are positioned in the gradual change slots.
According to the butler matrix of the present invention, the tapered line and the tapered slot are wide in the middle and gradually narrow in the directions of both ends.
According to the butler matrix, the gradually-changed slotted coupling structure of the multilayer circuit board comprises the upper-layer circuit layer, the upper-layer dielectric substrate, the floor, the bonding layer, the lower-layer dielectric substrate and the lower-layer circuit layer which are sequentially connected.
The invention also provides a dual-beam antenna comprising the Butler matrix.
The butler matrix of the dual-beam antenna comprises a first-stage electric bridge, a power dividing network and a second-stage electric bridge which are sequentially connected to form a network with two paths of input signals and P paths of output signals, wherein the P paths of output signals are respectively connected with P radiating units of an antenna subarray. The first-stage bridge, the power dividing network and the second-stage bridge are all of a multi-layer circuit board gradual change slotted coupling structure, signals are connected to the input end of the second-stage bridge in groups according to power after passing through the first-stage bridge or the power dividing network or directly serve as output signals of a Butler matrix, ultra-wideband impedance matching is achieved through the ultra-wideband slotted coupling structure, meanwhile, the coupling degree of the signals is reduced along with the increase of frequency, the slope is controllable, the power ratio of P-path output signals has the characteristic of changing along with the change of frequency, specifically, the power of the low end of a frequency band is small, the power of the high end of the frequency band is large, the horizontal plane beam width of the low end of the frequency band is small, the horizontal plane beam width of the high end of the frequency band is large, and the problems.
Drawings
Fig. 1 is a schematic structural diagram of a butler matrix of a dual-beam antenna according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a butler matrix of a dual-beam antenna according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a preferred structure of a tapered slot coupling structure of a multilayer circuit board of the present invention;
FIG. 4 is a schematic diagram of a preferred structure of the tapered slotted coupling structure of the present invention;
FIG. 5 is a power ratio diagram of a preferred embodiment of the Butler matrix of the present invention;
FIG. 6 is a horizontal plane pattern of a preferred embodiment of the Butler matrix of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Moreover, where certain terms are used throughout the description and following claims to refer to particular components or features, those skilled in the art will understand that manufacturers may refer to a component or feature by different names or terms. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. In addition, the term "connected" as used herein includes any direct and indirect electrical connection. Indirect electrical connection means include connection by other means.
The invention provides a butler matrix of a dual-beam antenna, which comprises a first-stage electric bridge, at least one power distribution network and at least one second-stage electric bridge which are electrically connected in sequence, wherein the first-stage electric bridge and the second-stage electric bridge respectively comprise two input ends and two output ends, and the power distribution network is a one-to-two power distribution network and comprises one input end and two output ends. The three are connected in sequence to form a network with two paths of input signals and P paths of output signals, the P paths of output signals are respectively connected with P radiating elements of the dual-beam antenna subarray, wherein P is more than or equal to 3.
The two input ends of the first-stage bridge are input ends of a Barrett matrix, the two output ends of the first-stage bridge are respectively connected with the input end of the power distribution network and/or the input end of the second-stage bridge, the two output ends of the power distribution network are respectively connected with the input end of the second-stage bridge and/or directly connected with the radiation units of the antenna subarray, and the two output ends of the second-stage bridge are respectively connected with the radiation units of the antenna subarray.
The first-stage electric bridge, the power distribution network and the second-stage electric bridge all adopt a gradually-changing slotted coupling structure of a multilayer circuit board. The signals form P paths of output signals after passing through the output end of the first-stage bridge and/or the output end of the power division network, the P paths of output signals are grouped according to the power and then are respectively connected to the input end of the second-stage bridge or directly used as output signals of the Butler matrix to be connected with the radiation units of the antenna subarray, and the output signals of the output end of the second-stage bridge are also respectively connected with the radiation units of the antenna subarray. Therefore, ultra-wideband impedance matching is achieved, meanwhile, the coupling degree of signals is reduced along with the increase of frequency, the slope is controllable, the power ratio of P-path output signals has the characteristic of changing along with the change of frequency, specifically, the power of the low end of a frequency band is small, the power of the high end of the frequency band is large, the horizontal plane beam width of the low end of the frequency band is small, the horizontal plane beam width of the high end of the frequency band is large, and the problems of cross-area coverage and cavities caused by the fact that the horizontal plane beam width range of an ultra-wideband dual-beam antenna is too.
Preferably, 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.
Preferably, the working frequency band of the butler matrix of the present invention is 1710-.
Preferably, the power ratio of the P output signals ranges from 1:1 to 1:15, and the slope is controllable.
Fig. 1 is a schematic structural diagram of a butler matrix of a dual-beam antenna according to a first embodiment of the present invention, where the butler matrix 100 includes a first-stage bridge 10, a power dividing network 20, and a second-stage bridge 30, which are 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 distribution network 20 is a one-to-two power distribution network including one input terminal and two output terminals. The first-stage bridge 10, the power distribution network 20 and the second-stage bridge 30 all adopt a gradually-changing slotted coupling structure of a multilayer circuit board. Preferably, the first stage bridge 10 and the second stage bridge 30 are 3dB bridges. The number P of output signal paths of the butler matrix 100 is 3.
The two input ends 1, 2 of the first stage bridge 10 are input ends of a butler matrix 100, and the two output ends 3, 4 of the first stage bridge 10 are respectively connected to the input end of the power dividing network 20 and one input end of the second stage bridge 30, so as to form three output signals 3, 5 and 6. Two output terminals of the power distribution network 20 are respectively connected to another input terminal of the second-stage bridge 30 and the radiating elements of one antenna sub-array, and two output terminals of the second-stage bridge 30 are respectively connected to the radiating elements of two antenna sub-arrays.
In a first form: the signal passes through one output terminal of the first stage bridge 10 and two output terminals of the power dividing network 20 to form three output signals 3, 5 and 6. The output signal 3 of the first-stage electric bridge 10 and the output signal 5 with smaller power in the power division network 20 are connected to two input ends of the second-stage electric bridge 30 in a combined manner, two output ends of the second-stage electric bridge 30 form two output signals 7 and 8 which are respectively connected with the radiation units of the two antenna sub-arrays, the output signal 6 with larger power in the power division network 20 is directly used as one output signal of the butler matrix 100 to be connected with the radiation unit of one antenna sub-array, and 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 sub-array.
In a second form: the signal passes through one output end of the first stage bridge 10 and two output ends of the power dividing network 20 to form three paths of output signals. The output signal of the first-stage electric bridge 10 and the output signal with higher power in the power distribution network 20 are combined and connected to two input ends of the second-stage electric bridge 30, the output signals of two output ends of the second-stage electric bridge 30 are respectively connected to the radiating elements of two antenna sub-arrays, and the output signal with lower power in the power distribution network 20 is directly connected to the radiating element of one antenna sub-array. The power ratio of the three output signals of the butler matrix 100 changes with the frequency change, specifically, the power at the low end of the frequency band is relatively low, and the power at the high end of the frequency band is relatively high.
Preferably, the power ratio of the three output signals is increased along with the increase of the frequency, the slope is controllable, the range of the power ratio is 1:1-1:15, and the slope is controllable.
The invention provides a Butler matrix 100 with a power ratio changing along with frequency change, so that the power of the lower end of a frequency band is smaller, the power of the higher end of the frequency band is larger, the horizontal plane beam width of the lower end of the frequency band is smaller, and the horizontal plane beam width of the higher end of the frequency band is larger by changing an array factor, and therefore the problems of coverage cross areas and cavities caused by the fact that the power ratio of the Butler matrix is constant and the horizontal plane beam width range of an ultra-wideband dual-beam antenna is too large in the prior art are solved.
Fig. 2 is a schematic structural diagram of a butler matrix of a dual-beam antenna according to a second embodiment of the present invention, where the butler matrix 100 includes a first-stage bridge 10, two power dividing networks 20, and two second-stage bridges 30, which are 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 distribution network 20 is a one-to-two power distribution network including one input terminal and two output terminals. The first-stage bridge 10, the power distribution network 20 and the second-stage bridge 30 all adopt a gradually-changing slotted coupling structure of a multilayer circuit board. Preferably, the first stage bridge 10 and the second stage bridge 30 are 3dB bridges. The number P of output signal paths of the butler matrix 100 is 4.
Two input ends 1 and 2 of the first-stage bridge 10 are input ends of a butler matrix 100, two output ends 3 and 4 of the first-stage bridge 10 are respectively connected to input ends of two power dividing networks 20, so that four paths of output signals 5 to 8 are formed, two output ends of the two power dividing networks 20 are respectively connected to two input ends of two second-stage bridges 30, and two output ends of the two second-stage bridges 30 are respectively connected to radiation units of four antenna sub-arrays.
Specifically, the signal passes through two output ends of two power dividing networks 20 to form four paths of output signals 5 to 8, and then the four paths of output signals 5 to 8 are grouped according to the power. For example, two output signals 7 and 8 with lower power in two power dividing networks 20 are connected to two input ends of one second-stage bridge 30, two output signals 5 and 6 with higher power in two power dividing networks 20 are connected to two input ends of another second-stage bridge 30, so as to form four output signals 9 and 10, 11 and 12, and the output signals 9 and 10, 11 and 12 at two output ends of the two second-stage bridges 30 are respectively connected to the input ends of the radiating elements of the four antenna sub-arrays. The power ratio of the four output signals of the butler matrix 100 changes with the frequency change, specifically, the power at the low end of the frequency band is relatively low, and the power at the high end of the frequency band is relatively high.
Preferably, the power ratio of the four output signals is increased along with the increase of the frequency, the slope is controllable, the range of the power ratio is 1:1-1:15, and the slope is controllable.
Fig. 3 is a schematic diagram of a preferred structure of the gradually-varied slotted coupling structure of the multilayer circuit board of the present invention, wherein the butler matrix 100 is etched on the circuit board, and the cross section of the circuit board is of a multilayer structure. The first-stage bridge 10, the power division network 20 and the second-stage bridge 30 of the butler matrix 100 all adopt a gradually-changing slotted coupling structure of a multilayer circuit board, and the gradually-changing slotted coupling structure of the multilayer circuit board at least comprises an upper circuit layer 21, a floor 23 and a lower circuit layer 26 which are sequentially connected. As shown in fig. 4, the upper circuit layer 21 and the lower circuit layer 26 are respectively provided with a gradually changing circuit 211 and 261, the floor 23 is correspondingly provided with a gradually changing slot 231, and the two gradually changing circuits 211 and 261 are located in the gradually changing slot 231. The gradually deformed lines 211 and 261 and the gradually deformed groove 231 have a shape that is wide in the middle and gradually narrowed toward both ends. The butler matrix 100 can realize ultra-wideband impedance matching while making the coupling degree smaller and the slope controllable as the frequency increases, by the tapered slot 231 provided on the floor 23 and the tapered lines 211 and 261 provided on the upper-layer line layer 21 and the lower-layer line layer 26.
Preferably, the gradually-changing slotted coupling structure of the multilayer circuit board comprises 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 which are 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 selected from PP (polypropylene), and the technology is high-temperature adhesion. The butler matrix 100 of the present invention has the characteristics of flexible wiring and high processing precision.
Fig. 5 is a power ratio diagram of a butler matrix according to a preferred embodiment of the present invention, in which the power ratios of the four output signals of the butler matrix vary with frequency, specifically, the power at the low end of the frequency band is relatively low, and the power at the high end of the frequency band is relatively high, where the power ratio of 1710MHz is about 1:2.5:2.5:1, and the power ratio of 2690MHz is about 1:6:6: 1.
Fig. 6 is a horizontal plane directional diagram of a butler matrix according to a preferred embodiment of the present invention, wherein the horizontal plane beam width of the dual-beam antenna of the butler matrix is convergent, specifically 25-41 ° within the range of 1710-.
The present invention also provides a dual beam antenna comprising the butler matrix 100 described above.
In summary, the butler matrix of the dual-beam antenna of the present invention includes a first-stage bridge, a power dividing network and a second-stage bridge, which are sequentially connected to form a network having two input signals and P output signals, where the P output signals are respectively connected to P radiating elements of an antenna sub-array. The first-stage bridge, the power dividing network and the second-stage bridge are all of a multi-layer circuit board gradual change slotted coupling structure, signals are connected to the input end of the second-stage bridge in groups according to power after passing through the first-stage bridge or the power dividing network or directly serve as output signals of a Butler matrix, ultra-wideband impedance matching is achieved through the ultra-wideband slotted coupling structure, meanwhile, the coupling degree of the signals is reduced along with the increase of frequency, the slope is controllable, the power ratio of P-path output signals has the characteristic of changing along with the change of frequency, specifically, the power of the low end of a frequency band is small, the power of the high end of the frequency band is large, the horizontal plane beam width of the low end of the frequency band is small, the horizontal plane beam width of the high end of the frequency band is large, and the problems.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A Butler matrix of a dual-beam antenna is characterized by comprising a first-stage electric bridge, at least one power dividing network and at least one second-stage electric bridge which are electrically connected in sequence, wherein the first-stage electric bridge and the second-stage electric bridge are respectively provided with two input ends and two output ends, and the power dividing network comprises one input end and two output ends; the first-stage electric bridge, the power distribution network and the second-stage electric bridge all adopt a gradually-changed slotted coupling structure of a multilayer circuit board;
two input ends of the first-stage bridge are input ends of a butler matrix, two output ends of the first-stage bridge are respectively connected with the input end of the power distribution network and/or the input end of the second-stage bridge, two output ends of the power distribution network are respectively connected with the input end of the second-stage bridge and/or directly connected with the radiation units of the antenna subarray, and two output ends of the second-stage bridge are respectively connected with the radiation units of the antenna subarray;
the signal passes through the output end of the first-stage electric bridge and/or the output end of the power dividing network to form P paths of output signals, wherein P is more than or equal to 3; after being grouped according to the power, the P paths of output signals are respectively connected to the input end of the second-stage bridge or directly connected with the radiation units of the antenna subarray, and the output signals of the output end of the second-stage bridge are respectively connected with the radiation units of the antenna subarray.
2. The Butler matrix according to claim 1, wherein the P output signals are grouped according to two output signals with higher power and/or two output signals with lower power.
3. The Butler matrix of claim 1, wherein the power ratio of the P output signals varies with frequency, and the power at the lower end of the frequency band is relatively small and the power at the upper end of the frequency band is relatively large; and/or
The power ratio range of the P paths of output signals is 1:1-1:15, and the slope is controllable.
4. The butler matrix of claim 1, wherein the first stage bridge and the second stage bridge are 3dB bridges; and/or
The working frequency band of the Butler matrix is 1710-2690MHz, and the horizontal beam width is 25-41 degrees.
5. The butler matrix of claim 1, including one of said first stage bridges, one of said power splitting networks and one of said second stage bridges electrically connected in sequence;
two output ends of the first-stage bridge are respectively connected to an input end of the power distribution network and an input end of the second-stage bridge, two output ends of the power distribution network are respectively connected to the other input end of the second-stage bridge and a radiation unit of one antenna sub-array, and two output ends of the second-stage bridge are respectively connected with the radiation units of the two antenna sub-arrays;
the signal passes through one output end of the first-stage bridge and two output ends of the power dividing network to form three paths of output signals; the output signal of the first-stage electric bridge and the output signal with lower power in the power distribution network are combined and connected to two input ends of the second-stage electric bridge, the output signals of two output ends of the second-stage electric bridge are respectively connected with the radiation units of two antenna sub-arrays, and the output signal with higher power in the power distribution network is directly connected with the radiation unit of one antenna sub-array; or
The signal passes through one output end of the first-stage bridge and two output ends of the power dividing network to form three paths of output signals; the output signal of the first-stage electric bridge and the output signal with higher power in the power distribution network are combined and connected to two input ends of the second-stage electric bridge, the output signals of two output ends of the second-stage electric bridge are respectively connected with the radiation units of two antenna sub-arrays, and the output signal with lower power in the power distribution network is directly connected with the radiation unit of one antenna sub-array.
6. The butler matrix of claim 1, comprising one of the first stage bridges, two of the power splitting networks and two of the second stage bridges electrically connected in sequence;
two output ends of the first-stage bridge are respectively connected to input ends of the two power distribution networks, two output ends of the two power distribution networks are respectively connected to two input ends of the two second-stage bridges, and two output ends of the two second-stage bridges are respectively connected with radiating units of four antenna sub-arrays;
the signal passes through two output ends of the two power division networks to form four paths of output signals respectively; two paths of output signals with lower power in the two power division networks are connected to two input ends of one second-stage bridge, and two paths of output signals with higher power in the two power division networks are connected to two input ends of the other second-stage bridge; and output signals of two output ends of the two second-stage bridges are respectively connected with the radiating units of the four antenna sub-arrays.
7. The butler matrix of claim 1, wherein the tapered slotted coupling structure of the multilayer circuit board comprises at least an upper circuit layer, a floor and a lower circuit layer connected in sequence; the floor is characterized in that the upper layer circuit layer and the lower layer circuit layer are respectively and correspondingly provided with a gradual change circuit, the floor is correspondingly provided with gradual change slots, and the two gradual change circuits are positioned in the gradual change slots.
8. The butler matrix of claim 7, wherein the tapered lines and the tapered slots are wider at the middle and gradually narrower toward the ends.
9. The butler matrix of claim 7, wherein the tapered slotted coupling structure of the multilayer 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 connected in sequence.
10. A dual beam antenna comprising a butler matrix as claimed in any one of claims 1 to 9.
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| CN202011030398.5A CN112310656A (en) | 2020-09-27 | 2020-09-27 | Butler matrix of dual-beam antenna and dual-beam antenna |
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| CN202110083185.7A Pending CN112636008A (en) | 2020-09-27 | 2021-01-21 | Butler matrix of dual-beam antenna and dual-beam antenna |
| CN202120167301.9U Active CN214849069U (en) | 2020-09-27 | 2021-01-21 | Butler matrix of dual-beam antenna and dual-beam antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114171875A (en) * | 2022-02-14 | 2022-03-11 | 中国电信股份有限公司 | Combiner and indoor branch system |
| CN117117520A (en) * | 2023-10-18 | 2023-11-24 | 中信科移动通信技术股份有限公司 | Antenna |
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| CN112310656A (en) * | 2020-09-27 | 2021-02-02 | 摩比天线技术（深圳）有限公司 | Butler matrix of dual-beam antenna and dual-beam antenna |
| CN113036436B (en) * | 2021-03-02 | 2022-06-14 | 电子科技大学 | Miniaturized reconfigurable beam forming network architecture |
| CN116565556A (en) * | 2023-05-08 | 2023-08-08 | 佛山市迪安通讯设备有限公司 | Ultra-wideband antenna capable of linearly adjusting beam width |
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| CN117117520B (en) * | 2023-10-18 | 2024-01-02 | 中信科移动通信技术股份有限公司 | Antenna |
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| CN214849069U (en) | 2021-11-23 |
| CN112310656A (en) | 2021-02-02 |
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