CN215771561U - Dual-frequency dielectric antenna and base station antenna array - Google Patents
Dual-frequency dielectric antenna and base station antenna array Download PDFInfo
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- CN215771561U CN215771561U CN202121949594.2U CN202121949594U CN215771561U CN 215771561 U CN215771561 U CN 215771561U CN 202121949594 U CN202121949594 U CN 202121949594U CN 215771561 U CN215771561 U CN 215771561U
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Abstract
The utility model relates to the technical field of communication, and provides a dual-frequency dielectric antenna and a base station antenna array. According to the dual-frequency dielectric antenna provided by the utility model, the dielectric oscillator is fed through the feeding ring, meanwhile, the dielectric constant range of the dielectric oscillator is eight to thirty, the dielectric constant is higher, the volume of the dielectric oscillator can be compressed to a certain degree, and compared with the antenna manufactured by the conventional PCB process or the antenna manufactured by the metal die casting process in the prior art, the dual-frequency dielectric antenna has smaller volume of the dielectric oscillator, so that the whole antenna array can be miniaturized.
Description
Technical Field
The utility model relates to the technical field of communication, and particularly provides a dual-frequency dielectric antenna and a base station antenna array with the same.
Background
The antenna is a key device of a modern wireless communication system and is widely applied to wireless communication base stations and various communication terminals. In the 5G era, the importance of antennas was particularly prominent. In many cases, the area of the antenna determines the area of the entire base station system, and the manner in which the antenna is assembled and mounted also has a great influence on the entire system.
The traditional 5G base station antenna basically works at a single frequency point, such as 2.6GHz, 3.5GHz and 4.9GHz, and base station units of different frequency bands need to be designed and installed independently, so that the number of the antennas is large, the occupied area is large, and the miniaturization development of the whole base station system is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dual-frequency dielectric antenna, and aims to solve the problem that the whole volume of a base station system is larger due to single working frequency point of the conventional dielectric antenna.
In order to achieve the purpose, the utility model adopts the technical scheme that:
in a first aspect, the present application provides a dual-frequency dielectric antenna, including a feeding board, a feeding ring structure disposed on the feeding board, and a dielectric element disposed on the feeding board, where the feeding board feeds power to the dielectric element through the feeding ring structure, and a dielectric constant of the dielectric element ranges from eight to thirty.
The utility model has the beneficial effects that: according to the dual-frequency dielectric antenna provided by the utility model, the dielectric oscillator is fed through the feeding ring, meanwhile, the dielectric constant range of the dielectric oscillator is eight to thirty, the dielectric constant is higher, the volume of the dielectric oscillator can be compressed to a certain degree, and compared with the antenna manufactured by the conventional PCB process or the antenna manufactured by the metal die casting process in the prior art, the dual-frequency dielectric antenna has smaller volume of the dielectric oscillator, so that the whole antenna array can be miniaturized.
In one embodiment, the outline structure of the dielectric vibrator is a cubic shape, a columnar shape, or a hemispherical shape.
In one embodiment, the feed loop structure includes a feed loop body in a closed structure and a feed line connected to the feed loop body.
In one embodiment, the feed ring body is a circular feed ring body; or the feed ring main body is a regular polygon feed ring main body, and the number of sides of the regular polygon feed ring main body is an even number.
In one embodiment, the dielectric element is detachably connected to the feeding board.
In one embodiment, the dielectric vibrator is connected to the feed board in a clamping mode.
In a second aspect, the present application provides a base station antenna array, which includes a plurality of the dual-band dielectric antennas, where each of the dual-band dielectric antennas is distributed in an array.
The utility model has the beneficial effects that: on the basis of the dual-frequency medium antenna, the base station antenna array provided by the utility model has smaller integral volume.
In one embodiment, the distance H between the dielectric elements of two adjacent dual-frequency dielectric antennas in the same horizontal row ranges from 0.45 λ to 0.55 λ.
In one embodiment, in the same column, the distance D between the dielectric elements of two adjacent dual-frequency dielectric antennas ranges from 0.7 λ to 0.8 λ.
In one embodiment, the dielectric elements of adjacent dual-band dielectric antennas are connected by a network branch line in the same column, and the network branch line has at most one branch line segment matched with a quarter wavelength.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-band dielectric antenna according to an embodiment of the present invention;
fig. 2 is a field distribution diagram of the dual-band dielectric antenna provided by the embodiment of the utility model in the fundamental field mode;
fig. 3 is a field distribution diagram of the dual-band dielectric antenna provided in the embodiment of the present invention in the secondary mode;
fig. 4 is a schematic structural diagram of a base station antenna array according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100. a dual-frequency dielectric antenna; 10. a feed board; 20. a feed loop structure; 30. a dielectric resonator; 21. a feed ring body; 22. a feed line; 200. a network branch line; 201. a branch line segment.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a dual-band dielectric antenna 100 of the present application includes a feeding board 10, a feeding loop structure 20 disposed on the feeding board 10, and a dielectric element 30 disposed on the feeding board 10, where the feeding board 10 feeds power to the dielectric element 30 through the feeding loop structure, and a dielectric constant of the dielectric element 30 ranges from eight to thirty. It is understood that the dielectric constant of the dielectric element 30 may be eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, twenty-eight, twenty-nine, thirty.
The dual-band dielectric antenna 100 has two modes of operation, a fundamental mode and a secondary mode. Specifically, as shown in fig. 2, the dielectric element 30 of the dual-band dielectric antenna 100 is in a fundamental mode field distribution at 2.6GHz, and it can be seen that 1 resonant standing wave is generated in the horizontal direction; as shown in fig. 3, the dielectric element 30 of the dual-frequency dielectric antenna 100 is in the secondary mode field distribution at 3.5GHz, and it can be seen that 2 resonant standing waves are generated in the horizontal direction and radiated outward.
According to the dual-frequency dielectric antenna 100 provided by the utility model, the dielectric oscillator 30 is fed through the feeding ring, meanwhile, the dielectric constant range of the dielectric oscillator 30 is eight to thirty, the dielectric constant is higher, the volume of the dielectric oscillator 30 can be compressed to a certain degree, and compared with the antenna manufactured and formed by the PCB process or the antenna manufactured and formed by the metal die casting process which is conventionally adopted in the prior art, the volume of the dielectric oscillator 30 is smaller, so that the whole antenna array can be miniaturized.
Preferably, in an embodiment, the dielectric constant of the dielectric element 30 is twelve or nineteen, and different dielectric constants affect the isolation, the operating bandwidth, and other performances of the antenna, so that the specific dielectric constant and the material of the dielectric element 30 need to be selected according to a specific application scenario.
The specific size and dielectric constant will make the antenna have the characteristic of multi-frequency operation, for example, when the external structure of the dielectric element 30 is three-dimensional, and the length, width, height, and dielectric constant are 36mm 7mm, the dual-frequency dielectric antenna 100 can simultaneously operate at 2.6GHz and 3.5GHz, and has dual-frequency characteristics.
In one embodiment, the outline structure of the dielectric vibrator 30 is a cubic shape, a columnar shape, or a hemispherical shape. Here, the outer shape of the dielectric vibrator 30 may be selected according to actual circumstances. Preferably, the material of the dielectric resonator 30 may be ceramic, magnesium oxide, titanium oxide, or other basic oxides.
Referring to fig. 1, in one embodiment, the feeding loop structure 20 includes a feeding loop body 21 in a closed structure and a feeding line 22 connected to the feeding loop body 21. It is understood that the feeding loop main body 21 and the feeding line 22 of the feeding loop structure 20 are plated on the feeding board 10 by using an electroplating process, and the bottom of the dielectric vibrator 30 is further disposed on the feeding loop main body 21 to achieve the contact therebetween.
Specifically, in one embodiment, the feed loop body 21 is a circular feed loop body, and the port isolation and cross-polarization ratio of the dual-band dielectric antenna 100 are optimized by adjusting the diameter of the circular feed loop body. Alternatively, referring to fig. 1, in another embodiment, the feeding ring main body 21 is a regular polygon feeding ring main body, and the number of sides of the regular polygon feeding ring main body is an even number. Specifically, the feed loop body 21 is a positive quadrilateral feed loop body, wherein the port isolation and cross polarization ratio of the antenna are optimized by adjusting the line widths of two sets of opposite sides of the positive quadrilateral feed loop body.
For the fixation between the feeding board 10 and the dielectric vibrator 30, the feeding board 10 and the dielectric vibrator 30 can be directly and fixedly connected, the fixed connection between the feeding board 10 and the dielectric vibrator 30 can be realized by adopting a glue bonding mode, and the assembly mode is simpler by adopting a bonding mode. In order to avoid that the applied glue layer affects the dielectric constant of the whole dielectric resonator 30, the thickness of the glue layer is typically thin or the effect of the thickness of the glue layer on the dielectric constant is taken into account when determining the dielectric constant.
Alternatively, in another embodiment, the dielectric element 30 is also detachably connected to the feeding board 10. Specifically, the dielectric element 30 may be detachably connected to the feeding board 10 by a connection method such as clamping, plugging, and the like.
Illustratively, the dielectric element 30 is snap-connected to the feeding board 10. In particular, the connection to the panel feed 10 may be by snap-fit structures. Namely, the fastening structure is provided with a hook, and the feed board 10 is provided with a fastening hole adapted to the hook, so that the dielectric vibrator 30 and the feed board 10 can be detachably connected through the adaptive connection of the hook and the feed board.
Referring to fig. 4, the present application provides a base station antenna array including a plurality of the dual-band dielectric antennas 100, wherein the dual-band dielectric antennas 100 are distributed in an array. It will be appreciated that the dual-band dielectric antenna 100 has a rectangular array of elements, for example, 3 x 4 small arrays and 8 x 12 large arrays.
The base station antenna array provided by the utility model has smaller overall volume on the basis of the dual-frequency dielectric antenna 100.
In order to satisfy the requirement of the base station antenna array having dual frequency bands, for example, when two frequency bands of 2.6GHz and 3.5GHz are considered, the distance between the dielectric oscillators 30 should be adjusted. In one embodiment, the distance H between the dielectric elements 30 of two adjacent dual-band dielectric antennas 100 in the same horizontal row is in the range of 0.45 λ and 0.55 λ. Here, the pitch of the dielectric elements 30 of two adjacent dual-band dielectric antennas 100 in the same horizontal line is a distance from the left side of the dielectric element 30 positioned in the front row to the left side of the dielectric element 30 positioned in the rear row. Optionally, the spacing H of the dielectric elements 30 of two adjacent dual-frequency dielectric antennas 100 is 0.45 λ, 0.46 λ, 0.47 λ, 0.48 λ, 0.49 λ, 0.50 λ, 0.51 λ, 0.52 λ, 0.53 λ, 0.54 λ, 0.55 λ.
Similarly, in one embodiment, the distance D between the dielectric elements 30 of two adjacent dual-band dielectric antennas 100 in the same column ranges from 0.7 λ to 0.8 λ. Here, in the same column, the pitch of the dielectric elements 30 of two adjacent dual-band dielectric antennas 100 is a distance from the tip edge of the dielectric element 30 in the front row to the tip edge of the dielectric element 30 in the rear row. Optionally, the spacing D of the dielectric elements 30 of two adjacent dual-frequency dielectric antennas 100 is 0.70 λ, 0.71 λ, 0.72 λ, 0.73 λ, 0.74 λ, 0.75 λ, 0.76 λ, 0.77 λ, 0.78 λ, 0.79 λ, 0.80 λ.
Referring to fig. 4, in one embodiment, the dielectric elements 30 of adjacent dual-band dielectric antennas 100 are connected by a network branch 200 in the same column, and the network branch 200 has at most one branch segment 201 matching a quarter wavelength.
By way of example, taking 3.05GHz as a reference frequency point as an example, a 3 × 4 base station antenna array is designed, any one column is composed of 3 dielectric oscillators 30, a matching network of the antenna array is formed by combining three sections of network branches 200, each section of network branch 200 only includes a branch section 201 with a quarter wavelength matched, so that the working bandwidth of the matching network can be expanded to the maximum extent, wherein in the same horizontal row, the distance H between two adjacent dielectric oscillators 30 is 0.50 λ, and in the same vertical column, the distance D between two adjacent dielectric oscillators 30 is 0.75 λ. As a result, the amplitude error of the matching network in two working frequency bands of 2.6GHz and 3.5GHz is not more than 0.5dB, and the phase error is not more than 7 degrees.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dual-band dielectric antenna, comprising: the feed plate feeds electricity to the dielectric oscillator through the feed ring structure, and the dielectric constant range of the dielectric oscillator is eight to thirty.
2. The dual-band dielectric antenna of claim 1, wherein: the outline structure of the dielectric vibrator is cubic, cylindrical or hemispherical.
3. The dual-band dielectric antenna of claim 1, wherein: the feed ring structure comprises a feed ring main body in a closed structure and a feed line connected to the feed ring main body.
4. The dual-band dielectric antenna of claim 3, wherein: the feed ring main body is a circular feed ring main body; or the feed ring main body is a regular polygon feed ring main body, and the number of sides of the regular polygon feed ring main body is an even number.
5. The dual-band dielectric antenna of any one of claims 1 to 4, wherein: the dielectric vibrator is detachably connected to the feed board.
6. The dual-band dielectric antenna of claim 5, wherein: the dielectric oscillator is connected to the feed board in a clamping mode.
7. A base station antenna array, comprising: comprising a plurality of the dual band dielectric antennas of any of claims 1 through 6, each of the dual band dielectric antennas being arranged in an array.
8. The base station antenna array of claim 7, wherein: in the same horizontal row, the range of the distance H between the dielectric elements of two adjacent double-frequency dielectric antennas is 0.45 lambda-0.55 lambda.
9. The base station antenna array of claim 7, wherein: in the same column, the range of the distance D between the dielectric elements of two adjacent double-frequency dielectric antennas is 0.7 lambda-0.8 lambda.
10. The base station antenna array of claim 7, wherein: in the same column, the dielectric elements of the adjacent dual-frequency dielectric antennas are connected through a network branch line, and the network branch line has at most one branch line segment matched with a quarter wavelength.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121949594.2U CN215771561U (en) | 2021-08-18 | 2021-08-18 | Dual-frequency dielectric antenna and base station antenna array |
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| CN202121949594.2U CN215771561U (en) | 2021-08-18 | 2021-08-18 | Dual-frequency dielectric antenna and base station antenna array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113839203A (en) * | 2021-08-18 | 2021-12-24 | 大富科技(安徽)股份有限公司 | Dual-frequency dielectric antenna and base station antenna array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113839203A (en) * | 2021-08-18 | 2021-12-24 | 大富科技(安徽)股份有限公司 | Dual-frequency dielectric antenna and base station antenna array |
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