CN114069212A - Radiation unit and base station antenna - Google Patents
Radiation unit and base station antenna Download PDFInfo
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- CN114069212A CN114069212A CN202111178332.5A CN202111178332A CN114069212A CN 114069212 A CN114069212 A CN 114069212A CN 202111178332 A CN202111178332 A CN 202111178332A CN 114069212 A CN114069212 A CN 114069212A
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- board body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
Abstract
The invention provides a radiation unit and a base station antenna, wherein the radiation unit comprises a substrate and a microstrip line; the substrate comprises a main board body, a plurality of bending units and a plurality of feeding sheets; the main board body is positioned in the central area of the substrate; the bending units are positioned at the edge part of the substrate and are in polarization orthogonal distribution; the bending unit is connected with the edge of the main board body, and an included angle between the bending unit and the main board body is a first preset included angle; the main plate body is provided with a through hole; the feed sheet is connected with a connecting part between the through hole and the main board body, and an included angle between the feed sheet and the main board body is a second preset included angle; the plurality of feed pieces are connected by microstrip lines and are all used for feeding the radiation unit. The invention realizes simple optimization of the structure of the substrate, can effectively improve the cross polarization ratio of the radiation unit, avoids additional material increase and additional occupation of space resources of the antenna, and has simple operation, low cost and simple structure.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a radiation unit and a base station antenna.
Background
The polarization refers to the polarization of the radiated electric wave in the maximum radiation direction, which can be defined as the locus of the end point movement of the electric field vector in the maximum radiation direction. Due to the physical structure of the antenna itself, etc., the electric field vector of the far field radiated by the antenna includes a component in the orthogonal direction, i.e., the cross polarization of the antenna, in addition to the moving direction of the antenna itself. Cross-polarization is one of the important parameters in communication base station antennas and is commonly referred to as cross-polarization discrimination.
In general, cross polarization refers to a polarization component orthogonal to main polarization, which is generally present in dual-polarized antennas, particularly plus and minus 45-degree dual-polarized antennas in civil mobile communication base station antennas. The concept of polarization plays a very important role and significance in the theory of electromagnetic waves: the co-polarization and cross-polarization are mainly relative to our main polarization direction, and if one polarization direction is consistent with the main polarization direction, the co-polarization is called, and if one polarization direction is orthogonal to the main polarization direction, the cross-polarization is called.
The polarization diversity technology mainly adopts a plus-minus 45-degree dual-polarization antenna in a base station antenna. Plus and minus 45 ° polarization is obtained because energy coupling or correlation between two closely adjacent antennas will affect the system interference rejection and diversity gain. Therefore, the mobile communication system puts an additional requirement on a cross-polarization ratio, i.e., a cross-polarization discrimination rate, which is characteristic of polarization purity, for the plus and minus 45 ° dual-polarized antenna. The larger the cross polarization ratio is, the stronger the orthogonality of signals obtained from the antenna is, the smaller the correlation between two paths of signals is, and the better the polarization effect is. In summary, how to improve the cross polarization ratio of the antenna is a problem to be solved urgently in the field.
The prior art typically increases the cross-polarization ratio of the antenna by adding a shield around the antenna, but this approach requires additional cost.
Disclosure of Invention
The invention provides a radiation unit and a base station antenna, which are used for solving the defects that in the prior art, additional cost needs to be added due to the fact that a surrounding baffle is additionally arranged around the antenna, and the cross polarization ratio of the antenna is improved under the condition that the cost is reduced.
The invention provides a radiation unit, which comprises a substrate and a microstrip line;
the substrate comprises a main board body, a plurality of bending units and a plurality of feeding sheets;
the main board body is positioned in the central area of the substrate;
the bending units are positioned at the edge part of the substrate and are in polarization orthogonal distribution;
the bending unit is connected with the edge of the main board body, and an included angle between the bending unit and the main board body is a first preset included angle;
the main board body is provided with a through hole;
the feeding sheet is connected with a connecting part between the through hole and the main board body, and an included angle between the feeding sheet and the main board body is a second preset included angle;
the plurality of feed pieces are connected by the microstrip line and are all used for feeding the radiation unit.
According to the radiation unit provided by the invention, the distance from the through hole to the center of the substrate is smaller than the distance from the bending unit to the center of the substrate.
According to the radiation unit provided by the invention, the substrate is quadrilateral, and the number of the bending units is four;
the four bending units are formed by bending edge parts of four corners which are orthogonally polarized at a positive and negative 45 degrees on the substrate under the action of external force.
According to the radiation unit provided by the invention, the number of the feed sheets is four;
the four feed pieces are orthogonally distributed in a positive and negative 45-degree polarization mode to form two pairs of symmetrical feed pieces;
each pair of symmetrical feed plates is connected through the microstrip line, and the phase difference between the input currents of each pair of symmetrical feed plates is 180 degrees.
According to the radiation unit provided by the invention, the substrate is provided with a notch;
the notch is positioned between any two adjacent bending units.
According to the radiation unit provided by the invention, the first preset included angle is any angle between 0 degree and 90 degrees;
the second preset included angle is 90 degrees.
According to the radiation unit provided by the invention, the strength of the substrate is greater than a first preset value, and the weight of the substrate is less than a second preset value.
According to the radiation unit provided by the invention, the shape of each through hole is a polygon or a circle.
According to the radiation unit provided by the invention, the substrate is prepared in a sheet metal stamping mode.
The invention also provides a base station antenna comprising one or more radiating elements as described in any of the above.
According to the radiation unit and the base station antenna provided by the invention, the edge part of the substrate is provided with the bending unit which is orthogonally polarized at a positive and negative 45 degrees, and the substrate is provided with the feed sheet which is connected with the through hole on the main board body and the connecting part between the main board body, so that on one hand, the current purity of the radiation unit in the polarization direction can be effectively increased by simply optimizing the structure of the substrate, and further, the cross polarization ratio of the radiation unit is improved; on the other hand, the structure of the substrate is changed to improve the cross polarization ratio of the radiation unit, so that the problems of extra material increase, extra occupation of space resources of the antenna and great limitation of arrangement layout in the antenna are avoided, and the antenna has the performances of simple operation, low cost and simple structure.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a radiation unit provided by the present invention;
fig. 2 is a second schematic structural diagram of a radiation unit provided in the present invention;
fig. 3 is a third schematic structural diagram of a radiation unit provided in the present invention;
FIG. 4 is one of the schematic diagrams of cross-polarization ratio performance profiles of the radiating elements provided by the present invention;
FIG. 5 is a second schematic diagram of cross-polarization ratio performance distribution of the radiating element provided by the present invention;
FIG. 6 is one of the schematic diagrams of cross-polarization ratio performance profiles of prior art radiating elements;
FIG. 7 is a second schematic diagram of cross-polarization ratio performance distribution of a prior art radiating element;
reference numerals:
1: a substrate; 101: a bending unit; 102: a feeding sheet;
103: a through hole; 104: a notch; 2: a microstrip line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, it should be noted that all terms with directional terms, such as "upper", "lower", "left", "right", "front", "rear", "center", "longitudinal", "lateral", etc., indicate directional relationships, and are used for convenience in describing examples of the present invention, but do not indicate that an element or device must be constructed in a specific direction, and should not be construed as limiting the specific scope of the present invention.
In the present invention, unless otherwise specified or limited, the terms "assembled", "connected", and the like are to be understood in a broad sense. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; the connection may be direct, through an intermediate medium, or internally between the two components. To those skilled in the art, the specific meanings of the above terms in the present invention can be explained in specific cases.
When a dual-polarization working mode is adopted, a communication system has to solve the problem of good cross polarization, particularly the problem of whether an earth station can be accessed into a network and opened or not by an uplink channel of a satellite communication system. In a circular polarization working mode, the quality of cross polarization isolation mainly depends on the voltage axis ratio of a circular polarizer, and the phase difference of two electric field components must be well controlled; in the linear polarization working mode, the satellite-ground polarization must be finely adjusted in place, otherwise, the cross polarization isolation is greatly reduced. Therefore, it is crucial how to make the radiating elements have good cross-polarization ratio. In the embodiment, the bending units which are orthogonally distributed in polarization are arranged at the edge part of the substrate, and the feed sheet is connected with the connecting part between the through hole and the main board body, so that the radiation unit has excellent cross polarization ratio performance by improving the structure of the radiation unit.
The following describes the radiating element of the present invention with reference to fig. 1, 2 and 3, including a substrate 1 and a microstrip line 2; the substrate 1 comprises a main board body, a plurality of bending units 101 and a plurality of feeding sheets 102;
the working frequency of the radiation unit can be set according to actual requirements, for example, the working frequency band of the radiation unit is between 3.3GHz and 3.8 GHz.
The radiation unit is a basic structural unit constituting an antenna, which can efficiently radiate or receive radio waves. Wherein, the preparation material of radiation unit can select according to actual demand, chooses for use to possess certain structural strength and difficult bending and light metal of weight. The preparation material of the radiation unit can be a metal die-casting plate or a metal stamping plate; accordingly, the substrate 1 is a metal die-cast plate or a metal stamped plate, and the bending unit 101 and the feed tab 102 are metal die-cast plates or metal stamped plates. Among them, the metal may be an aluminum alloy or the like.
The size and shape of the substrate 1 and the main plate body may be set according to actual requirements, for example, the size is 29.5 × 29.5mm, which is not specifically limited in this embodiment. Wherein the dimensions include width, length, and thickness.
The size and shape of the bending unit 101 and the size and shape of the feeding tab 102 can also be set according to actual requirements. Such as a feed tab 102 having dimensions of 2.5 x 8.5 mm.
The number of the bending units 101 and the feeding pieces is a multiple of 4, such as 4 or 8, and the specific number is set according to actual requirements.
The main board body is positioned in the central area of the substrate 1;
optionally, the main plate body is arranged in a central region of the substrate.
The bending units 102 are located at the edge portion of the substrate and are in polarization orthogonal distribution;
optionally, the main board body is located in a central region of the substrate, and the plurality of bending units are located at an edge portion of the substrate and exhibit orthogonal polarization distribution. Preferably, the polarizations are orthogonally distributed at the edge portion of the substrate at plus or minus 45 degrees.
The machining mode of the main plate body and the bending unit can be integrated machining or independent overtime machining, and can be selected according to actual requirements. The following description will be made by integrally processing the main plate body and the bending unit.
The specific processing mode is that the bending unit is formed by bending a first preset included angle by the edge part which is orthogonally polarized at a positive and negative 45 degrees on the substrate under the action of external force;
optionally, the bending unit 101 is formed by bending a first preset included angle by the edge portion of the substrate 1, which is orthogonal to the positive and negative 45-degree polarization, under the action of external force, wherein the first preset included angle can be set according to actual requirements.
Wherein, the bending direction is downward bending.
The connection portions between the plurality of bending units and the substrate are orthogonally arranged with polarization of plus or minus 45 degrees.
Accordingly, the plurality of bending units 101 correspond to the plurality of edge portions.
Each of the bending units 101 has the same size and shape, and the plurality of edge portions have the same size and shape.
Alternatively, the plurality of bending units 101 are divided into 4 groups, two groups of bending units 101 distributed diagonally are used as a pair of bending units 101, and two pairs of bending units 101 are arranged in a manner that polarization of plus and minus 45 degrees is orthogonal.
In the prior art, a radiation unit of a bending unit is not arranged at the edge part of a substrate, and the distribution of current on the radiation unit comprises current along the transverse direction and the axial direction of the edge of the radiation unit, which is different from the polarization direction, so that a large amount of current components in the non-polarization direction exist, the current purity in the polarization direction of the radiation unit is low, and the cross polarization of the radiation unit is low; in the embodiment, the edge part which is orthogonal to the positive and negative 45-degree polarization on the substrate is bent under the action of external force to form the bending unit, so that the direction of current transmitted on the radiation unit is consistent with the polarization direction of the radiation unit, and no component in the non-polarization direction is generated on the current distribution, thereby effectively increasing the current purity in the polarization direction of the radiation unit, reducing the mutual coupling between different frequency bands, and further improving the cross polarization ratio of the radiation unit.
The bending unit is connected with the edge of the main board body, and an included angle between the bending unit and the main board body is a first preset included angle;
optionally, one end of each bending unit is connected with the edge of the main board body, and the connection parts of the plurality of bending units and the main board body are in polarization orthogonal distribution.
Wherein, first predetermined contained angle can set up according to actual demand.
The main board body is provided with a through hole; the feeding sheet is connected with a connecting part between the through hole and the main board body, and an included angle between the feeding sheet and the main board body is a second preset included angle;
preferably, the feeding sheet and the main board body may also be processed in an integrated processing manner, and the specific processing manner is that after the feeding sheet 102 is used to cut the substrate 1 to form the through hole 103, the cutting portion is bent by a second preset included angle with the portion connected with the substrate as a bending axis.
The second preset included angle may be set according to actual requirements, and this embodiment does not specifically limit this.
The bending direction of the feed sheet and the bending direction of the bending unit are in the same direction and are both bent downwards; the first preset angle and the second preset angle may be the same or different, and this embodiment is not particularly limited thereto.
In this embodiment, after the feeding sheet 102 is directly formed by cutting the substrate to form the through hole, the cutting portion is connected to the substrate and serves as the bending axis, and the cutting portion is bent to form the feeding sheet, so that not only can an additional material be prevented from being added as the feeding sheet, but also additional occupation of space resources of the antenna can be avoided, and the feeding sheet is simple in operation, low in cost, simple in structure and applicable to a large batch of production and manufacturing scenes of the radiation units.
The plurality of feeding pieces 102 are connected by the microstrip line, and are all used for feeding the radiation unit 1.
The microstrip line 2 is a microwave transmission line formed by a single conductor strip supported on a dielectric substrate. The plurality of feed tabs 102 are connected by the microstrip line 2 to feed the radiation element.
The feeding mode is that the radiation unit is fed in a bottom feeding mode.
Compare with prior art, it improves antenna cross polarization ratio to enclose the fender in the increase around the radiating element, this embodiment is direct edge portion on the base plate sets up the unit of buckling that is positive and negative 45 degrees polarization quadrature, so that the current direction of transmission is unanimous with the polarization direction of radiating element on the radiating element, effectively increase the current purity on the radiating element, and then improve the cross polarization ratio of radiating element, and directly improve radiating element self, not only can avoid additionally increasing the material, and avoid additionally occupying the space resource of antenna, therefore, the steam generator is simple in operation, the carrier wave prepaid electric energy meter is low in cost, and is simple in structure.
In the embodiment, the bending unit which is orthogonally polarized at a positive and negative 45 degrees is arranged at the edge part of the substrate, and the feeding sheet which is connected with the through hole on the main board body and the connecting part between the main board body and the through hole on the main board body is arranged on the substrate, so that on one hand, the current purity of the radiation unit in the polarization direction can be effectively increased by simply optimizing the structure of the substrate, and further, the cross polarization ratio of the radiation unit is improved; on the other hand, the structure of the substrate is changed to improve the cross polarization ratio of the radiation unit, so that the problems of extra material increase, extra occupation of space resources of the antenna and great limitation of arrangement layout in the antenna are avoided, and the antenna has the performances of simple operation, low cost and simple structure.
On the basis of the above embodiments, in this embodiment, the distance between the through hole and the center of the substrate is smaller than or equal to the distance between the bending unit and the center of the substrate.
Alternatively, the plurality of feed tabs 102 are uniformly distributed within a target area at a set distance from the substrate 1. The set distance can be set according to actual requirements.
Accordingly, the plurality of through holes 103 are also uniformly distributed within the target area of the substrate 1.
Wherein, the distance between the through hole and the center of the substrate is less than or equal to the distance between the bending unit and the center of the substrate.
The feed tab is positioned at a side close to the center point of the substrate, i.e., the portion of the cut portion connected to the substrate is positioned at a side close to the center point of the substrate
The through hole 103 may be connected to the bending unit 101 or may be separated from the bending unit 101, which is not specifically limited in this embodiment.
Preferably, the center point of the through hole, the center point of the portion of the bending unit connected to the substrate, and the center of the substrate are all on the same straight line.
In the present embodiment, the center point of the through hole, the center point of the portion where the bending unit is connected to the substrate, and the center of the substrate are all on the same straight line, so that the feeding direction of the feeding sheet and the transmission direction of the current on the bending unit 101 are all the same as the polarization direction of the radiation unit, so as to optimize the cross polarization ratio to the greatest extent.
On the basis of the above embodiments, in this embodiment, the substrate 1 is a quadrilateral, and the number of the bending units 101 is four; the four bending units 101 are respectively formed by bending edge portions of four corners of the substrate 1, which are orthogonally polarized at 45 degrees and positive and negative, under the action of external force.
Alternatively, when the substrate 1 is a quadrangle, the edge portions of the four corners of the substrate 1 orthogonal to each other with polarization of plus or minus 45 degrees are bent downward to form the bending units 101. The four bending units 101 are orthogonally distributed in polarization of plus and minus 45 degrees.
Alternatively, in order to verify that the radiation unit in the present embodiment has the performance of optimizing the cross-polarization ratio, the performance of the radiation unit in the present embodiment is described by taking the four corners of the substrate 1 bent downward by 45 degrees to form the bending unit 101 as an example.
As shown in fig. 4 and 5, the radiation performance of the radiation unit in this example in each frequency band in the polarization direction of plus and minus 45 degrees is respectively shown.
As shown in fig. 6 and 7, the radiation performance of the radiation unit in each frequency band in the plus and minus 45 degree polarization direction when the substrate 1 in the radiation unit is not bent in the prior art is shown.
TABLE 1 Cross-polarization ratio of radiating elements before and after bending of the substrate
As can be seen from comparing fig. 4 and 6, and fig. 5 and 7, the radiation performance of the radiation unit in the present embodiment is significantly better than that of the radiation unit without bending the substrate 1.
In addition, as can be seen from table 1, the overall cross polarization ratio of the radiation unit in this embodiment in each frequency band is significantly better than that of the radiation unit in the prior art, in which the substrate is not bent. And in the frequency band of 3.3 to 3.8GHz, the cross polarization ratio of the radiation unit in the embodiment is 22dB in the axial range, and the cross polarization ratio is-18 dB in the range of plus or minus 60 degrees. The cross polarization performance of the existing radiation unit needs to meet the requirements that the absolute value of the cross polarization ratio in the axial range is at least larger than 15dB, and the absolute value of the cross polarization ratio in the range of plus or minus 60 degrees is at least larger than 10dB, and the cross polarization ratio of the radiation unit in the embodiment can completely meet the cross polarization performance of the existing radiation unit and has good radiation performance.
In the embodiment, the edge parts of the four corners of the substrate are directly bent downwards to form the bending units, so that the transmission directions of the current on the radiation units are the same as the polarization directions of the radiation units, and the cross polarization ratio of the radiation units can be effectively improved.
On the basis of the above embodiments, the number of the feeding pieces 102 in this embodiment is four; four feed pieces 102 are orthogonally distributed in a positive and negative 45-degree polarization mode to form two pairs of symmetrical feed pieces 102; each pair of symmetrical feed plates 102 is connected through the microstrip line 2, and the phase difference between the input currents of each pair of symmetrical feed plates 102 is 180 degrees.
Optionally, the number of feed tabs 102 is also 4;
the distribution of the 4 feeding strips 102 is consistent with the distribution of the 4 bending units, that is, the four feeding strips 102 are orthogonally distributed with positive and negative 45-degree polarization to form two pairs of symmetrical feeding strips 102, and the two pairs of symmetrical feeding strips 102 are orthogonally distributed.
Wherein, the two symmetrically distributed feeding pieces 102 form a pair of feeding piece pairs; two pairs of symmetrical feed plate pairs are distributed on the substrate 1 in a manner of polarization orthogonality of plus and minus 45 degrees.
Each pair of symmetrical feed plates is connected through the microstrip line 2, and the phase difference between the input currents of each pair of symmetrical feed plates is 180 degrees, that is, the currents input on the feed plates of the same polarization of the radiation unit have a phase difference of 180 degrees.
In the embodiment, the four feeding sheets are used for feeding the radiating element to form four-point feeding, so that currents input to the metal feeding sheets with the same polarization of the radiating element have a phase difference of 180 °.
Through the four-point feeding mode, two groups of differential double-feeds formed between the two pairs of feeding pieces can be achieved, current distribution on the radiating unit tends to be consistent, directional diagram wave beam convergence is better, and impedance bandwidth is further improved.
On the basis of the above embodiments, in this embodiment, the substrate 1 is further provided with a notch 104; the notch 104 is located between any two adjacent bending units 101.
Alternatively, the shape of the notch 104 may be the same as or different from that of the through hole, and this embodiment is not particularly limited thereto.
The shape of the notch 104 also includes, but is not limited to, polygonal shapes and circular shapes. The size of the notch 104 may be set according to practical requirements, such as 4.75 × 3.5mm, which is not specifically limited in this embodiment.
The number of the notches 104 is adaptively adjusted according to the number of the bending units 101, that is, there is a corresponding relationship between the number of the notches 104 and the number of the bending units 101.
A gap 104 is arranged between any two adjacent bending units 101. Wherein the width of the gap 104 can be set according to practical requirements.
For example, if the number of the bending units 101 is 4, the number of the notches 104 is also 4, and the 4 notches 104 are arranged in the horizontal direction and the vertical direction with the center position of the substrate 1 as the origin, that is, the second of two diagonally arranged notches 104 of the 4 notches is a set, and the two sets of notches are orthogonally arranged.
Each bending unit 101 is typically included as a part of each vibrator arm. Through setting up the breach, can reduce the influence between two adjacent oscillator arms on the radiating element, and then can effectively improve the performance of radiating element's circuit parameter for the radiating element has good circuit performance.
On the basis of the above embodiments, in this embodiment, the first preset included angle is any angle between 0 degree and 90 degrees; the second preset included angle is 90 degrees.
Optionally, the second preset included angle is 90 degrees, that is, one end of the feed tab 102 is connected to the main board body, and the other end extends outward and is perpendicular to the main board body.
One end of the bending unit 101 is connected to the main board body, and the other end is delayed downwards by any angle between 0 degrees and 90 degrees, such as 45 degrees or 60 degrees.
The first preset included angle may be adjusted according to actual requirements, which is not specifically limited in this embodiment.
It should be noted that, when the first preset included angle is any angle between 0 degree and 90 degrees, the cross polarization ratio of the antenna can be effectively optimized.
In the embodiment, the cross polarization ratio of the radiation unit can be greatly improved only by bending the unit, and the radiation unit has the advantages of simple structure and low cost, and is suitable for mass production and manufacturing.
On the basis of the above embodiments, in the present embodiment, the strength of the substrate 1 is greater than the first preset value, and the weight is less than the second preset value.
Optionally, to avoid breaking or deformation of the substrate during bending, the basic properties of the substrate are affected. The intensity that this embodiment set up the basic station is greater than first default, guarantees that the base plate has certain structural strength, is difficult for buckling.
In addition, the mass of the substrate is set to be less than or equal to a second preset threshold value.
The substrate in the embodiment has certain structural strength, is not easy to bend, has a simple structure and light weight, and effectively reduces the production cost and the maintenance cost.
On the basis of the above embodiments, the shape of each through hole in the present embodiment is a polygon or a circle.
Alternatively, the shape of each through hole is a polygon or a circle, and the like, and the polygon includes a rectangle, a triangle, and the like, which is not specifically limited in this embodiment.
Preferably, the plurality of through holes are identical in shape.
It should be noted that, on the premise of ensuring that the size of the through hole is greater than or equal to that of the feeding sheet, the size of each through hole may be set according to actual requirements, and this embodiment is not particularly limited by contrast. For example, the width and length dimensions of the via are 4.5 × 8.5mm, and the width and length dimensions of the feed tab are 2.5 × 8.5 mm.
The shape of through-hole can be selected according to actual demand in this embodiment, and the adjustability is strong, and is nimble convenient.
On the basis of the above embodiments, the substrate 1 in this embodiment is prepared by a sheet metal stamping method.
Optionally, the substrate can be prepared by stamping a sheet metal part, so that the substrate is convenient to process and manufacture and easy to process.
The following describes the base station antenna provided by the present invention, and the base station antenna described below and the above-described radiation unit may be referred to correspondingly.
The present embodiment provides a base station antenna including one or more radiation units, which is not particularly limited in the present embodiment.
The frequency bands of the plurality of radiation units may be the same or different, and this embodiment is not particularly limited in this respect.
By properly arranging and distributing a plurality of radiating elements, a multi-band fusion base station antenna can be obtained.
Because the cross polarization ratio of the base station antenna can be optimized by the plurality of radiation units, the interference between the radiation units of all frequency bands in the same base station antenna can be relieved, the mutual coupling between different frequency bands is effectively reduced, the cross polarization ratio of the base station antenna is effectively improved, the plurality of radiation units have good circuit performance and radiation performance, the performance of the base station antenna with the multi-frequency band radiation units fused can be effectively improved, the signal quality of the antenna is further improved, and the experience degree of a user is improved.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A radiation unit is characterized by comprising a substrate and a microstrip line;
the substrate comprises a main board body, a plurality of bending units and a plurality of feeding sheets;
the main board body is positioned in the central area of the substrate;
the bending units are positioned at the edge part of the substrate and are in polarization orthogonal distribution;
the bending unit is connected with the edge of the main board body, and an included angle between the bending unit and the main board body is a first preset included angle;
the main board body is provided with a through hole;
the feeding sheet is connected with a connecting part between the through hole and the main board body, and an included angle between the feeding sheet and the main board body is a second preset included angle;
the plurality of feed pieces are connected by the microstrip line and are all used for feeding the radiation unit.
2. The radiating element of claim 1, wherein a distance between the through hole and a center of the substrate is less than or equal to a distance between the bending element and the center of the substrate.
3. The radiating element of claim 1, wherein the base plate is quadrilateral, and the number of the bent elements is four;
the four bending units are formed by bending edge parts of four corners which are orthogonally polarized at a positive and negative 45 degrees on the substrate under the action of external force.
4. The radiating element of claim 3, wherein the number of the feed tabs is four;
the four feed pieces are orthogonally distributed in a positive and negative 45-degree polarization mode to form two pairs of symmetrical feed pieces;
each pair of symmetrical feed plates is connected through the microstrip line, and the phase difference between the input currents of each pair of symmetrical feed plates is 180 degrees.
5. The radiating element of any one of claims 1 to 4, wherein the substrate is notched;
the notch is positioned between any two adjacent bending units.
6. The radiating element of any one of claims 1 to 4, wherein the first predetermined included angle is any angle between 0 degrees and 90 degrees;
the second preset included angle is 90 degrees.
7. The irradiation unit of any of claims 1-4, wherein the substrate has a strength greater than a first predetermined value and a weight less than a second predetermined value.
8. The radiating element of any one of claims 1-4, wherein each through hole is polygonal or circular in shape.
9. The radiant unit of any of claims 1 to 4 wherein the base plate is prepared by sheet metal stamping.
10. A base station antenna comprising one or more radiating elements according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111178332.5A CN114069212A (en) | 2021-10-09 | 2021-10-09 | Radiation unit and base station antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111178332.5A CN114069212A (en) | 2021-10-09 | 2021-10-09 | Radiation unit and base station antenna |
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| CN114069212A true CN114069212A (en) | 2022-02-18 |
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