CN208873896U - A kind of six beam array antenna of wideband - Google Patents
A kind of six beam array antenna of wideband Download PDFInfo
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- CN208873896U CN208873896U CN201821653235.0U CN201821653235U CN208873896U CN 208873896 U CN208873896 U CN 208873896U CN 201821653235 U CN201821653235 U CN 201821653235U CN 208873896 U CN208873896 U CN 208873896U
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- 239000002184 metal Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 8
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- 238000003466 welding Methods 0.000 claims description 4
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- 238000010295 mobile communication Methods 0.000 description 4
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- 230000008094 contradictory effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of six beam array antenna of wideband, is related to field of communication technology, including metallic reflection plate, radiation cell array and beam-forming network；Radiation cell array includes multiple subarrays being made of vertical arrangement radiating element；All radiating element arrangement modes are consistent；The radiating element orientation of all adjacent subarrays is identical in radiation cell array or the radiating element orientation of the part subarray of two sides is opposite with the subarray radiating element in middle position；Beam-forming network includes 8 × 8 butler matrix circuitries and the power distributing network for carrying out amplitude adjusted to signal；The phase of the output port of 8 × 8 butler matrix circuitries, which exists, is incremented by relationship；The antenna structure is simple, and network rate and capacity are high, is furthermore assembled simply using die casting unit, and not only antenna size is smaller, weight is lighter for preferred 4 row, 14 array structure, but also vertical surface wave width is wider, more conducively closely covers.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a six wave beam array antenna of wide band.
Background
After the fourth generation mobile communication technology 4G/LTE is commercialized in a large scale, data traffic in a mobile communication network is increased dramatically, and the bandwidth capacity of a mobile communication system in a dense user area faces a huge pressure. In response to the limited capacity of a single cell, using a multi-beam antenna, the coverage area of a conventional single sector may be subdivided into multiple sectors, multiplying the capacity of the wireless channel. The utility model publication No. CN 102570057A proposes a method of generating five beams using a 6 × 6 butler matrix. Each row of the radiation units which are uniformly distributed is connected with the vertical power divider and then connected with the output port of the 6 x 6 butler matrix, and each polarization corresponds to one 6 x 6 butler matrix. However, the operating bandwidth of the technology is only 23.7% (1710-. Patent 201621038190.7 discloses that the grating lobe suppression capability is better by using a horizontally staggered radiation element arrangement. However, the technical scheme realizes the broadband five-beam antenna with a fixed inclination angle, one polarization needs 2 sets of beam forming networks and combines a phase compensation circuit, the structure is complex, the cost is high, the weight is heavy, and the large-scale application and popularization resistance is large.
A stadium gathers tens of thousands or even 10 thousands of mobile communication users in an olympics event, etc., and cell splitting using five beams is still insufficient to cope with the increasing traffic demand. In order to further increase the capacity, it is necessary to develop a base station antenna with more beams, while simplifying the structure of the antenna system and reducing the cost. Therefore, it is necessary to design a wideband six-beam array antenna with a simple structure and 6 beams on an azimuth plane, where the operating band is widened to 1695 + 2700MHz, and is compatible with the 4G and 3G system bands and part of the 2G system bands, and the azimuth direction within the operating band has good sidelobe and grating lobe suppression performance, so as to overcome the above problems. The patent No. WO 2017/156635a1 proposes a six-beam antenna with working frequency band 1696-2690MHz based on three layers of patch antenna units, and adopts 6 rows and 14 columns array, because the antenna units of the technology have more layers, more plastic supports, low production and assembly efficiency, and the gap on the floor has large influence on the unit performance, high control precision requirement, and is not beneficial to large-scale production.
SUMMERY OF THE UTILITY MODEL
The utility model discloses problem to the background art provides a six beam array antenna of wide band, this antenna structure is simple, and network speed and capacious, it is simple to use the assembly of die-casting unit in addition, and 4 lines of 14 column structures not only the antenna size is littleer, the weight is lighter moreover, and perpendicular wave width is wideer moreover, more does benefit to closely and covers.
In order to achieve the above object, the present invention provides a broadband six-beam array antenna, including: the device comprises a metal reflecting plate, a radiation unit array arranged on the metal reflecting plate and at least one beam forming network;
the radiation unit array comprises a plurality of sub-arrays formed by vertically arranged radiation units; all the radiation units in the sub-arrays are arranged in the same mode; the arrangement directions of the radiation units of all adjacent sub-arrays in the radiation unit array are the same, or the arrangement directions of the radiation units of partial sub-arrays at the two sides of the radiation unit array are opposite to the arrangement direction of the radiation unit of the sub-array at the middle position;
preferably, the number of the sub-arrays is 14.
The beam forming network comprises an 8 x 8 butler matrix circuit for forming six beams in an azimuth plane and a power distribution network for amplitude adjusting output signals of the 8 x 8 butler matrix circuit.
Preferably, the 8 × 8 butler matrix circuit includes a plurality of mixer groups and a plurality of phase shifters, each mixer group includes a plurality of 90-degree mixer circuits; the mixer groups are connected through phase shifters.
Preferably, the multi-stage mixer set comprises a first stage mixer set, a second stage mixer set and a third stage mixer set; wherein,
6 input ports in the input ports of the first-stage mixer group are used as input ports of the 8 multiplied by 8 butler matrix circuit, and the output ports of the first-stage mixer group are connected with the input ports of the second-stage mixer group through 4 phase shifters; the output port of the second-stage mixer group is connected with the input port of the third-stage mixer group through 4 phase shifters; the 8 output ports of the third stage mixer group are the output ports of the 8 × 8 butler matrix circuit.
Preferably, the other 2 input ports of the first-stage mixer group are connected with 50 ohm loads.
Preferably, when each input port of the 8 × 8 butler matrix circuit inputs a signal, the phases of the 8 output ports of the third stage mixer group have an increasing relationship.
Preferably, the 8 × 8 butler matrix circuit forms six beams in an azimuth plane, wherein the azimuth range of the first beam is 25 to 55 degrees, the azimuth range of the second beam is 15 to 30 degrees, the azimuth of the third beam is 4 to 15 degrees, the azimuth range of the fourth beam is-4 to-15 degrees, the azimuth range of the fifth beam is-15 to-30 degrees, and the azimuth range of the sixth beam is-25 to-55 degrees.
Preferably, the radiation unit is a dual-polarized antenna unit.
Preferably, the number of the radiation elements arranged in the vertical direction in each sub-array is 4.
Preferably, the antenna further comprises: the same polarization of the radiation unit is connected with the beam forming network through the power divider network; the power divider network comprises a plurality of 4-path power divider circuits.
Preferably, the frequency band in which the antenna operates is 1695-.
Preferably, the radiating element array adopts a die-casting unit, and the feeding sheet is connected with the oscillator body through welding.
The utility model provides a six wave beam array antennas of wide band, radiating element array include a plurality of subarrays, and each subarray contains at least one radiating element along the vertical direction range, and adjacent subarray arrangement mode is unanimous or the partial subarray that is located both sides arranges with the subarray of intermediate position is reverse; forming a beam forming network by adopting an 8 multiplied by 8 Butler matrix circuit and a power distribution network so as to generate 6 beams of an azimuth plane; according to the multi-beam array antenna, one set of beam forming network can generate 6 polarized beams on an azimuth plane, compared with the scheme that two sets of beam forming networks are used for ultra-wideband five beams in the prior art, the number of parts is reduced by half, and the number of connecting cables is reduced by half; meanwhile, the reverse sub-arrays reduce the components of the 180-degree phase shifter, and the components such as a beam forming network and the like are simplified by combining the reverse sub-arrays and the 180-degree phase shifter, so that the cost is reduced; the six-beam antenna has better side lobe and grating lobe suppression performance in an ultra-wide frequency band, reduces the adjacent cell interference of a cell corresponding to a beam, realizes the frequency reuse of the adjacent cell under the condition of not increasing the antenna site and the sky surface resources, and improves the network capacity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a layout structure of a radiating element of a broadband six-beam antenna according to a preferred embodiment of the present invention;
fig. 2 is a connection diagram of a beam forming network in a preferred embodiment of the present invention;
fig. 3 is a connection diagram of an 8 × 8 butler matrix circuit and a power distribution network according to a preferred embodiment of the present invention, in which fig. (a) is a schematic diagram of the 8 × 8 butler matrix circuit, and fig. (b) is a schematic diagram of the power distribution network;
fig. 4 is a layout diagram of a radiating element array according to a preferred embodiment of the present invention;
fig. 5 is a schematic diagram of a mechanical structure of a mixer and a phase shifter according to a preferred embodiment of the present invention, wherein (a) is a 3D perspective view and (b) is a mechanical blasting view;
fig. 6 is a composite pattern of six beams 1695, 2025 and 2700MHz frequencies in a preferred embodiment of the present invention, wherein (a) is a composite pattern of 1695MHz frequency, (b) is a composite pattern of 2025MHz frequency, and (c) is a composite pattern of 2700MHz frequency;
description of the symbols:
121 is a sub-array; 111 is a radiation unit; 101 is a vibrator; 301 is a first beam forming network; 302 is a second beam forming network; b (2, 1) ·. B (2, 7) ·. B (2, 14) is an output of the first beam forming network 301; 411. 412, 413, 414, 415, 416 are inputs to the first beam forming network 301; a (2, 1) ·. a (2, 7) ·. a (2, 14) is the output of the second beam forming network 302; 421. 422, 423, 424, 425, 426 are inputs to the second beam forming network 302; 310 is a phase shifter circuit, 311-1, 311-2, 311-3 and 311-4 are four 90-degree mixer circuits included in the first stage, and 312-1, 312-2, 312-3 and 312-4 are four 90-degree mixer circuit groups included in the second stage; 313-1, 313-2, 313-3 and 313-4 are four 90-degree mixer circuit groups comprised by the third stage; 314 is a load; 315 is a power distribution network; 501 is a connection block.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model relates to an in the preferred embodiment, every single every: the device comprises a metal reflecting plate, a radiation unit array arranged on the metal reflecting plate, a beam forming network and a power divider network, wherein the output end of the beam forming network is connected with the input end of the radiation unit array through the power divider network; the radiating element array comprises 14 sub-arrays 121 arranged in the vertical direction, each sub-array comprises 4 radiating elements 111, each radiating element is a dual-polarized antenna unit and comprises two orthogonal positive and negative 45-degree polarized elements 101, and the element directions of the 1 st, 2 rd and 3 rd sub-arrays of the radiating element array are the same as those of the 12 th, 13 th and 14 th sub-arrays and are opposite to those of the 4 th to 11 th sub-arrays; the vertical spacing VD of each subarray radiating element is equal, and the horizontal spacing HD between each subarray is equal;
in a preferred embodiment of the present invention, each row of the radiation units is connected to an output port of a power divider network, the power divider network is composed of a plurality of 4 power divider circuits, and the number of the 4 power divider circuits in this embodiment is 14 × 2 ═ 28; the same polarized oscillator of each row of radiation units in the radiation unit array is connected to the same output port of the 4-way power divider circuit through a cable, each beam has a 6-degree downward tilt in the vertical plane, and then is connected to the first beam forming network 301 and the second beam forming network 302 in fig. 2.
In a preferred embodiment of the present invention, as shown in fig. 2, the first beam forming network 301 and the second beam forming network 302 are connected to different polarization oscillators in the same vertical direction sub-array through 14 4 power splitters, respectively; b (2, 1) ·. B (2, 7) ·. B (2, 14) is an output of the first beam forming network 301, and 411, 412, 413, 414, 415, 416 are inputs of the first beam forming network 301; a (2, 1) ·. a (2, 7) ·. a (2, 14) is an output of the second beamforming network 302, and 421, 422, 423, 424, 425, 426 is an input of the second beamforming network 302;
in the embodiment of the present invention, each beam forming network is composed of an 8 × 8 butler matrix circuit and a power distribution network, as shown in fig. 3 (a) and (b), the 8 × 8 butler matrix circuit is shown in fig. 3 (a), and includes three stages of mixer circuit groups, the first stage includes four 90-degree mixer circuits 311-1, 311-2, 311-3, and 311-4, the second stage includes four 90-degree mixer circuit groups 312-1, 312-2, 312-3, and 312-4, and the third stage includes four 90-degree mixer circuit groups 313-1, 313-2, 313-3, and 313-4; the output ports of the first stage mixer circuit groups 311-1 to 311-4 are connected with the input ports of the second stage mixer circuit groups 312-1 to 312-4 in a staggered manner through the phase shifter circuit 310; the output ports of the second stage mixer circuit groups 312-1 to 312-4 are alternately connected to the input ports of the third stage mixer circuit groups 313-1 to 313-4 through the phase shifter circuit 310; the 6 output ports of the third stage mixer circuit groups 313-1 to 313-4 are connected to the power distribution network 315 of fig. 3 (b).
In the embodiment of the present invention, as shown in fig. 3 (a), the first-stage mixer circuit groups 311-1 to 311-4 of the 8 × 8 butler matrix circuit have two input ports connected to the 50 ohm load 314, and the remaining 6 ports B1 to B6 are used as the input/output ports of 6 beams; port B1 is the first beam, ranging from 25 to 55 degrees in azimuth; port B2 is the second beam, ranging from 15 to 30 degrees in azimuth; port B3 is the third beam, 4 to 15 degrees in azimuth; port B4 is the fourth beam, ranging in azimuth from-4 to-15 degrees; port B5 is the fifth beam, ranging from-15 to-30 degrees in azimuth; port B6 is the sixth beam, ranging from-25 to-55 degrees in azimuth.
In a preferred embodiment of the present invention, when the first beam forming network 301 and the second beam forming network 302 input signals to their ports, the phases of their output ports are increased by ± 22.5 degrees, ± 67.5 degrees, and ± 112.5 degrees, respectively.
In a preferred embodiment of the present invention, as shown in fig. 4, in the embodiment of the present invention, an array layout of 4 rows and 14 columns is provided, a die casting unit with a notch is adopted, a feed sheet is directly welded to a vibrator body, automation of welding of vibrator components can be realized by using an automation device, and welding efficiency of vibrator assembly is improved; the metal isolation sheets with the height of 15mm are arranged between the oscillators, so that the cross polarization ratio can be improved.
In a preferred embodiment of the present invention, as shown in fig. 5, in the embodiment of the present invention, a 90-degree mixer and a phase shifter are integrated, corresponding to 311-1 and 310 of fig. 3; fig. 5 is a 3D view in fig. (a), and fig. (b) is an exploded view in fig. 5; the module adopts a strip line structure, a circuit is positioned in the middle layer, the top layer and the bottom layer are both metal grounds, a PCB (printed circuit board) dielectric plate is arranged between the circuit and the metal grounds of the top layer and the bottom layer, and the input and output ports adopt a connecting block 501 to weld and fix cables; compared with the beam forming network of the microstrip line structure in the prior art, the beam forming network has the advantages of better shielding performance, more stable intermodulation and better front-to-back ratio.
As shown in fig. 6, panels (a), (b) and (c), the azimuth plane hexabeam pattern tested using the array layout of 4 rows and 14 columns, shows frequencies 1695MHz, 2025MHz and 2700MHz, respectively. The result shows that the sidelobe suppression of the other frequency points except the lower frequency point 1695MHz is lower than 15dB, the sidelobe suppression and the grating lobe suppression of the other frequency points are better than 15dB, the beam crossing level is 10.5dB, and the beam width range of 10dB is 70-121 degrees.
The utility model provides a six beam antenna electronics downward dip angle is fixed, is fit for the very intensive scene of user, for example large-scale stadium, performance center and square. By finely dividing cells in application scenes such as stadiums and the like and using multiple six-beam antennas, the communication capacity can be improved in multiples. Compared with the broadband five-beam antenna in the prior art, the broadband five-beam antenna has the advantages that one more beam is provided, the capacity is higher, one polarization oscillator only needs to use a single set of beam forming network, two sets of beam forming networks are not needed to suppress grating lobes, the structure is simpler, the weight is lighter, and the cost is lower. Meanwhile, the size of the antenna is equivalent to that of a five-beam antenna, wind load is not increased, and the antenna can be conveniently configured on an antenna tower.
Each subarray of the broadband six-beam array antenna comprises 4 radiation units which are arranged in the vertical direction, the six-beam antenna has good side lobe and grating lobe suppression performance in an ultra-wide frequency band, adjacent cell interference of a cell corresponding to a beam is reduced, frequency reuse of adjacent cells is achieved under the condition that antenna site and sky surface resources are not increased, and network capacity is improved.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (12)
1. A broadband six-beam array antenna, comprising: the device comprises a metal reflecting plate, a radiation unit array arranged on the metal reflecting plate and at least one beam forming network;
the radiation unit array comprises a plurality of sub-arrays formed by vertically arranged radiation units; all the radiation units in each subarray are arranged in the same mode; the arrangement directions of the radiation units of all adjacent sub-arrays in the radiation unit array are the same, or the arrangement directions of the radiation units of partial sub-arrays at the two sides of the radiation unit array are opposite to the arrangement direction of the radiation unit of the sub-array at the middle position;
the beam forming network comprises an 8 x 8 butler matrix circuit for forming six beams in an azimuth plane and a power distribution network for amplitude adjusting output signals of the 8 x 8 butler matrix circuit.
2. The broadband six-beam array antenna according to claim 1, wherein the phases of the output ports corresponding to each input port of the 8 x 8 butler matrix circuit are in an increasing relationship.
3. The broadband six-beam array antenna of claim 1, wherein the number of sub-arrays is greater than or equal to 8.
4. The broadband six-beam array antenna according to claim 1, wherein the number of radiating elements arranged in the vertical direction in the sub-array is 4.
5. The broadband six-beam array antenna of claim 1, wherein the 8 x 8 butler matrix circuit comprises a plurality of mixer sets and a plurality of phase shifters, each mixer set comprising a plurality of 90-degree mixer circuits; the mixer groups are connected through phase shifters.
6. The broadband six-beam array antenna of claim 1, wherein the 8 x 8 Butler matrix circuit forms six beams in an azimuth plane, wherein a first beam has an azimuth angle ranging from 25 to 55 degrees, a second beam has an azimuth angle ranging from 15 to 30 degrees, a third beam has an azimuth angle ranging from 4 to 15 degrees, a fourth beam has an azimuth angle ranging from-4 to-15 degrees, a fifth beam has an azimuth angle ranging from-15 to-30 degrees, and a sixth beam has an azimuth angle ranging from-25 to-55 degrees.
7. The broadband six-beam array antenna of claim 1, wherein the radiating elements are dual polarized antenna radiating elements.
8. The broadband six-beam array antenna of claim 5, wherein the multi-stage hybrid groups comprise a first stage hybrid group, a second stage hybrid group, and a third stage hybrid group; wherein,
6 input ports in the input ports of the first-stage mixer group are used as input ports of the 8 multiplied by 8 butler matrix circuit, and the output ports of the first-stage mixer group are connected with the input ports of the second-stage mixer group through 4 phase shifters; the output port of the second-stage mixer group is connected with the input port of the third-stage mixer group through 4 phase shifters; the 8 output ports of the third stage mixer group are the output ports of the 8 × 8 butler matrix circuit.
9. The broadband six-beam array antenna of claim 7, further comprising: the same polarization of the radiation unit is connected with the beam forming network through the power divider network; the power divider network comprises a plurality of 4-path power divider circuits.
10. The broadband six-beam array antenna of claim 8, wherein the other 2 input ports of the first mixer set are connected to a load.
11. The broadband six-beam array antenna of claim 1, wherein the frequency band in which the antenna operates is 1695-.
12. The broadband six-beam array antenna according to claim 1, wherein the radiating element array is formed by die-casting elements, and the feeding plate is connected with the element body by welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653235.0U CN208873896U (en) | 2018-10-12 | 2018-10-12 | A kind of six beam array antenna of wideband |
| PCT/CN2018/112085 WO2020073362A1 (en) | 2018-10-12 | 2018-10-26 | Broadband six-beam array antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821653235.0U CN208873896U (en) | 2018-10-12 | 2018-10-12 | A kind of six beam array antenna of wideband |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273870A (en) * | 2018-10-12 | 2019-01-25 | 广东博纬通信科技有限公司 | A kind of six beam array antenna of wideband |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273870A (en) * | 2018-10-12 | 2019-01-25 | 广东博纬通信科技有限公司 | A kind of six beam array antenna of wideband |
| CN109273870B (en) * | 2018-10-12 | 2024-10-15 | 广东博纬通信科技有限公司 | Broadband six-beam array antenna |
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