CN210723373U - Dual-polarized array antenna based on hybrid feed - Google Patents
Dual-polarized array antenna based on hybrid feed Download PDFInfo
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- CN210723373U CN210723373U CN201922325598.2U CN201922325598U CN210723373U CN 210723373 U CN210723373 U CN 210723373U CN 201922325598 U CN201922325598 U CN 201922325598U CN 210723373 U CN210723373 U CN 210723373U
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Abstract
The utility model discloses a dual-polarized array antenna based on hybrid feed, which relates to the technical field of antennas and comprises m dual-polarized antenna modules arranged in an array, wherein each dual-polarized antenna module comprises n dual-polarized antenna units arranged in an array; the horizontal feed ports of the dual-polarized antenna units are connected through a horizontal polarization feed network, the vertical feed ports are connected through a vertical polarization feed network, and the horizontal polarization feed network and the vertical polarization feed network are arranged on different layers. The feed network of the two polarization ports is arranged on different layers by combining the feed of the coplanar microstrip line and the feed of the slot coupling, so that the problems that the feed networks of the two polarization ports have strong coupling effect between the same layer and the feed network and the like are solved.
Description
Technical Field
The utility model relates to the technical field of antennas, especially, relate to a dual polarization array antenna based on mix feed.
Background
In recent years, with the rapid development of communication technology, wireless mobile communication is also widely applied, and a dual-polarized antenna is a novel antenna technology, combines two pairs of antennas with mutually orthogonal polarization directions of +45 degrees and-45 degrees and simultaneously works in a transceiving duplex mode, so that the most outstanding advantage of the dual-polarized antenna is that the number of antennas of a single directional base station is saved.
The feed networks of two polarized ports of an antenna unit in the existing dual-polarized array antenna are usually arranged on the same layer, the feed lines are distributed and arranged tightly, and the feed networks have strong coupling action, so that the feed networks can interfere with each other to influence the receiving and sending of signals; therefore, how to reduce the design difficulty and reduce the mutual coupling and interference between the feed networks is a problem to be solved at the present stage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a dual polarized array antenna based on mixed feed, solved the problem that present dual polarized array antenna exists.
The purpose of the utility model is realized through the following technical scheme: a dual-polarized array antenna based on hybrid feeding comprises m dual-polarized antenna modules arranged in an array, wherein each dual-polarized antenna module comprises n dual-polarized antenna units arranged in an array; the horizontal feed ports of the dual-polarized antenna units are connected through a horizontal polarization feed network, the vertical feed ports are connected through a vertical polarization feed network, and the horizontal polarization feed network and the vertical polarization feed network are arranged on different layers.
The horizontal polarization feed network is composed of output feed lines of m dual-polarized antenna modules, the output feed line of each dual-polarized antenna module comprises a plurality of first power dividers and a first impedance converter, each first power divider is connected with horizontal feed ports of the two dual-polarized antenna units, and the plurality of first power dividers are connected to the first impedance converters and then output.
The vertical polarization feed network is composed of output feed lines of m dual-polarized antenna modules, the output feed line of each dual-polarized antenna module comprises a plurality of second power dividers and a second impedance converter, each second power divider is connected with the vertical feed ports of the two dual-polarized antenna units, and the plurality of second power dividers are connected to the second impedance converters and then output.
The dual-polarized antenna unit comprises a coplanar microstrip line feed structure and a slot coupling feed structure; the coplanar microstrip line feed structure is arranged above the gap coupling feed structure, and the lower-layer emission floor is arranged below the gap coupling feed structure.
The coplanar microstrip line feed structure comprises an upper radiation patch, a lower radiation patch and a first feed microstrip line; the first feed microstrip line is connected with one end of the lower radiation patch.
The upper layer dielectric substrate is positioned above the upper layer feed substrate; an air layer is arranged between the upper dielectric substrate and the upper feed substrate to ensure the wider working bandwidth and high gain of the antenna.
The slot coupling feed structure comprises a coupling slot and a second feed microstrip line; the coupling gap is arranged on the upper-layer reflecting floor, and the second feed microstrip line is arranged on the lower-layer feed substrate.
The upper-layer reflecting floor is arranged between the upper-layer feeding substrate and the lower-layer feeding substrate; the lower layer feed substrate is arranged between the upper layer reflection floor and the lower layer reflection floor.
The coupling gap is an H-shaped coupling gap, and the second feed microstrip line is arranged on the central symmetry line of the H-shaped coupling gap; the first feed microstrip line and the second feed microstrip line form a 90-degree angle.
A first feed microstrip line in the dual-polarized antenna unit is connected to the first power divider; the second feed microstrip line is connected to the second power divider.
The utility model has the advantages that: a dual-polarized array antenna based on hybrid feed combines coplanar microstrip line feed and slot coupling feed to arrange a horizontal polarization feed network and a vertical polarization feed network on different layers, and solves the problems that the feed networks of two polarization ports have strong coupling effect on the same layer and between the feed networks; the multi-stage shunt feed network is adopted to realize the synthesis of the antenna energy, the characteristic impedance of a main transmission line in the power dividing network is 50 omega, therefore, the input impedance of each unit antenna is designed to be 50 omega, and 4 antennas of each polarization are synthesized into one port through the two-stage one-to-two power dividing network.
Drawings
Fig. 1 is a configuration diagram of a dual-polarized array antenna;
fig. 2 is a structural view of a dual polarized antenna unit;
fig. 3 is a top view of a dual polarized antenna element;
FIG. 4 is a radiation diagram of a dual polarized array antenna;
FIG. 5 is an axial ratio diagram of a dual-polarized array antenna;
in the figure, 1-upper layer radiation patch, 2-lower layer radiation patch, 3-first feed microstrip line, 4-upper layer medium substrate, 5-upper layer feed substrate, 6-air layer, 7-coupling gap, 8-upper layer reflection floor, 9-lower layer feed substrate, 10-second feed microstrip line, 11-lower layer reflection floor, 12-dual-polarization antenna unit, 13-vertical polarization feed network, 14-horizontal polarization feed network, and 15-dual-polarization antenna module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, a hybrid feed-based dual-polarized array antenna includes m dual-polarized antenna modules 15 arranged in an array, where each dual-polarized antenna module 15 includes n dual-polarized antenna elements 12 arranged in an array; the horizontal feed ports of the dual-polarized antenna unit 12 are connected through a horizontal polarization feed network 14, the vertical feed ports are connected through a vertical polarization feed network 13, and the horizontal polarization feed network 14 and the vertical polarization feed network 13 are arranged on different layers.
The horizontal polarization feed network 14 is composed of m output feed lines of the dual-polarized antenna modules 15, each output feed line of each dual-polarized antenna module 15 includes a plurality of first power dividers and a first impedance converter, each first power divider is connected to the horizontal feed ports of the two dual-polarized antenna units 12, and the plurality of first power dividers are connected to the first impedance converters and then output.
The vertical polarization feed network 13 is composed of m output feed lines of the dual-polarized antenna modules 15, each output feed line of each dual-polarized antenna module 15 includes a plurality of second power dividers and a second impedance converter, each second power divider is connected to the vertical feed ports of the two dual-polarized antenna units 12, and the plurality of second power dividers are connected to the second impedance converters and then output.
Furthermore, in order to meet the technical index requirements that the antenna gain is greater than 18dBi and the beam width is not less than 11 degrees multiplied by 11 degrees, 4 dual-polarized antenna modules 15 are arranged, and each dual-polarized antenna module 15 comprises 4 dual-polarized antenna units 12; i.e. a 4 x 4 packing scheme is used. The distance between the antenna units in the horizontal direction is 110mm, 4 units are arranged, and the distance between the antenna units in the pitching direction is 110mm, 4 units are arranged.
Further, the 50 Ω impedance of every two dual-polarized antenna units 12 in the array antenna is collected to the main port through a one-to-two power divider, and is connected in parallel to form 25 Ω impedance, and is converted into 50 Ω through 1/4 wave guide wavelength impedance converters, and similarly, the next dual-polarized antenna module 15 also performs impedance conversion through impedance converters with the same characteristic impedance and length, and finally is matched with 50 Ω at the output port. The vertical polarization feed network 13 works on the same principle as the horizontal polarization feed network 14.
As shown in fig. 2 and 3, the dual-polarized antenna unit 12 includes a lower transmission floor 11, a coplanar microstrip line feed structure and a slot coupling feed structure; the coplanar microstrip line feed structure is arranged above the gap coupling feed structure, and the lower emission floor 11 is arranged below the gap coupling feed structure.
The coplanar microstrip line feed structure comprises an upper-layer radiation patch 1, a lower-layer radiation patch 2 and a first feed microstrip line 3; the first feed microstrip line 3 is connected with one end of the lower radiation patch 2.
The upper-layer radiation patch 1 is arranged on the upper-layer medium substrate 4, and the lower-layer radiation patch 2 and the first feed microstrip line are arranged on the upper-layer feed substrate 5.
The upper dielectric substrate 4 is positioned above the upper feeding substrate 5.
An air layer 6 is also arranged between the upper dielectric substrate 4 and the upper feeding substrate 5 to ensure the wider operating bandwidth and high gain of the antenna.
The slot coupling feed structure comprises a coupling slot 7 and a second feed microstrip line 10; the coupling gap 7 is arranged on the upper layer reflection floor 8, and the second feed microstrip line 10 is arranged on the lower layer feed substrate 9.
The upper reflective floor 8 is arranged between the upper feed substrate 5 and the lower feed substrate 9.
The lower feed substrate 9 is disposed between the upper reflective floor 8 and the lower reflective floor 11.
The coupling slot 7 is an H-shaped coupling slot, and the second feed microstrip line 10 is arranged on the central symmetry line of the H-shaped coupling slot.
The first feed microstrip line 3 and the second feed microstrip line 10 form an angle of 90 degrees; the first feed microstrip line 3 and the second feed microstrip line 10 are respectively connected with different ports, the isolation of the two ports is more than 25dB, and the cross polarization is more than 20 dB.
Furthermore, the designed antenna is required to realize broadband circular polarization, broadband radiation is realized by selecting a method of sandwiching an air layer between two layers of radiation patches in consideration of the working frequency band of the antenna, a horizontal polarization feed network is arranged on the same layer of the lower layer of radiation patches, an H-shaped gap is formed in the upper part of the floor of the lower layer of patches, and vertical polarization excitation is realized through 50 omega microstrip line feed.
By optimizing the size of the lower radiation patch 2 and the thickness of the air layer 6, an optimal aperture coupling horizontal polarization antenna can be determined, and good matching of the first feed microstrip line 3 is realized. After the optimization design of the horizontal polarization antenna is completed, the optimal broadband excitation size and the optimal gain design of vertical polarization can be realized by optimizing the size of the H-shaped slot and the length of the short-circuit branch line of the second feed microstrip line 10.
As shown in fig. 4 and fig. 5, the dual polarization wavefront quarter voltage standing wave ratio band is less than 1.60, the pure wavefront antenna gain is greater than 19.6dB without considering the sum-difference network loss, and the antenna gain is expected to be greater than 18dB after considering the sum-difference network. The in-band axial ratio is less than 3 dB.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A dual-polarized array antenna based on hybrid feeding is characterized in that: the dual-polarized antenna comprises m dual-polarized antenna modules (15) arranged in an array, wherein each dual-polarized antenna module (15) comprises n dual-polarized antenna units (12) arranged in an array; the horizontal feed ports of the dual-polarized antenna units (12) are connected through a horizontal polarization feed network (14), the vertical feed ports are connected through a vertical polarization feed network (13), and the horizontal polarization feed network (14) and the vertical polarization feed network (13) are arranged on different layers.
2. A hybrid feed based dual polarized array antenna according to claim 1, wherein: the horizontal polarization feed network (14) is composed of output feed lines of m dual-polarized antenna modules (15), the output feed line of each dual-polarized antenna module (15) comprises a plurality of first power dividers and a first impedance converter, each first power divider is connected with horizontal feed ports of two dual-polarized antenna units (12), and the plurality of first power dividers are connected to the first impedance converters and then output.
3. A hybrid feed based dual polarized array antenna according to claim 2, wherein: the vertical polarization feed network (13) is composed of output feed lines of m dual-polarized antenna modules (15), the output feed line of each dual-polarized antenna module (15) comprises a plurality of second power dividers and a second impedance converter, each second power divider is connected with vertical feed ports of two dual-polarized antenna units (12), and the plurality of second power dividers are connected to the second impedance converters and then output.
4. A hybrid feed based dual polarized array antenna according to claim 3, wherein: the dual-polarized antenna unit (12) comprises a coplanar microstrip line feed structure and a slot coupling feed structure; the coplanar microstrip line feed structure is arranged above the gap coupling feed structure, and the lower-layer reflection floor (11) is arranged below the gap coupling feed structure.
5. A hybrid feed based dual polarized array antenna according to claim 4, characterized in that: the coplanar microstrip line feed structure comprises an upper-layer radiation patch (1), a lower-layer radiation patch (2) and a first feed microstrip line (3); the first feed microstrip line (3) is connected with one end of the lower radiation patch (2).
6. A hybrid feed based dual polarized array antenna according to claim 5, wherein: the high-power-density printed circuit board further comprises an upper-layer dielectric substrate (4) and an upper-layer feeding substrate (5), wherein the upper-layer dielectric substrate (4) is positioned above the upper-layer feeding substrate (5); an air layer (6) is arranged between the upper dielectric substrate (4) and the upper feeding substrate (5) to ensure the wider operating bandwidth and high gain of the antenna.
7. A hybrid feed based dual polarized array antenna according to claim 6, wherein: the slot coupling feed structure comprises a coupling slot (7) and a second feed microstrip line (10); the coupling gap (7) is arranged on the upper-layer reflection floor (8), and the second feed microstrip line (10) is arranged on the lower-layer feed substrate (9).
8. A hybrid feed based dual polarized array antenna as claimed in claim 7, wherein: the upper layer reflecting floor (8) is arranged between the upper layer feeding substrate (5) and the lower layer feeding substrate (9); the lower layer feeding substrate (9) is arranged between the upper layer reflecting floor (8) and the lower layer reflecting floor (11).
9. A hybrid feed based dual polarized array antenna as claimed in claim 7, wherein: the coupling gap (7) is an H-shaped coupling gap, and the second feed microstrip line (10) is arranged on the central symmetry line of the H-shaped coupling gap; the first feed microstrip line (3) and the second feed microstrip line (10) are 90 degrees.
10. A hybrid feed based dual polarized array antenna as claimed in claim 7, wherein: a first feed microstrip line (3) in the dual-polarized antenna unit (12) is connected to the first power divider; the second feed microstrip line (10) is connected to the second power divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325598.2U CN210723373U (en) | 2019-12-23 | 2019-12-23 | Dual-polarized array antenna based on hybrid feed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325598.2U CN210723373U (en) | 2019-12-23 | 2019-12-23 | Dual-polarized array antenna based on hybrid feed |
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| CN210723373U true CN210723373U (en) | 2020-06-09 |
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| CN201922325598.2U Active CN210723373U (en) | 2019-12-23 | 2019-12-23 | Dual-polarized array antenna based on hybrid feed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916892A (en) * | 2020-07-07 | 2020-11-10 | 深圳市信维通信股份有限公司 | 5G millimeter wave dual-polarized antenna unit, antenna array and terminal equipment |
| CN113690573A (en) * | 2021-07-20 | 2021-11-23 | 佛山市波谱达通信科技有限公司 | Cable gap-free intelligent antenna |
-
2019
- 2019-12-23 CN CN201922325598.2U patent/CN210723373U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916892A (en) * | 2020-07-07 | 2020-11-10 | 深圳市信维通信股份有限公司 | 5G millimeter wave dual-polarized antenna unit, antenna array and terminal equipment |
| CN113690573A (en) * | 2021-07-20 | 2021-11-23 | 佛山市波谱达通信科技有限公司 | Cable gap-free intelligent antenna |
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