CN112018522B - Antenna and feed assembly - Google Patents
Antenna and feed assembly Download PDFInfo
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- CN112018522B CN112018522B CN201910472293.6A CN201910472293A CN112018522B CN 112018522 B CN112018522 B CN 112018522B CN 201910472293 A CN201910472293 A CN 201910472293A CN 112018522 B CN112018522 B CN 112018522B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
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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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
Abstract
The embodiment of the application provides an antenna and feed subassembly, wherein, the antenna includes: the antenna comprises an antenna housing, a first antenna surrounding edge, a second antenna surrounding edge, a main reflecting surface and a feed source assembly; the main reflecting surface is suitable for at least two communication frequency bands in microwave communication; the antenna housing is arranged at the top end of the first antenna surrounding edge, the first antenna surrounding edge is connected with the second antenna surrounding edge, the second antenna surrounding edge is connected with the main reflecting surface, and the center of the bottom of the main reflecting surface is provided with the feed source assembly in a penetrating mode; the first antenna surrounding edge and the second antenna surrounding edge are both cylindrical surfaces and have the same caliber; the suppression angle of the antenna is less than or equal to 40 degrees. Because first antenna surrounding edge and second antenna surrounding edge are detachable independent part, through increasing or demolising first antenna surrounding edge, can realize the microwave antenna of different anti-interference levels, reduced the cost of changing the antenna.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to an antenna and feed source assembly.
Background
A microwave antenna is an extremely important component in a communication system, and the main function is to radiate or receive electromagnetic signals to or from a space.
The microwave antenna can be characterized by some indexes of the capability of radiating or receiving electromagnetic signals. Among them, the European Telecommunications Standardization Institute (ETSI) defines some classes (classes) according to the radiation pattern of an antenna, and the defined parameters include a front-to-back ratio, a side lobe, an envelope diagram, and the like, and are used for describing the interference signal suppression capability of the microwave antenna. Currently, the point-to-point microwave antennas that are mainstream in the market are generally in Class3 (C3).
However, with the advent of the 5G era, it is required to increase communication capacity by densely deploying microwave antennas. Because the C3 microwave antenna has a weak anti-interference capability and cannot meet the requirement of the anti-interference capability of the system in a densely deployed scene, a microwave antenna with a stronger anti-interference capability is required, for example, a Class4 (C4) microwave antenna. One solution may be to remove the deployed C3 microwave antenna and reinstall a completely new C4 microwave antenna. However, this results in a very high cost of antenna replacement.
Disclosure of Invention
The embodiment of the application provides an antenna and a feed source assembly, and the cost for replacing the antenna is reduced.
In a first aspect, an embodiment of the present application provides an antenna, including: the antenna comprises an antenna housing, a first antenna surrounding edge, a second antenna surrounding edge, a main reflecting surface and a feed source assembly; the main reflecting surface is suitable for at least two communication frequency bands in microwave communication; the antenna housing is arranged at the top end of the first antenna surrounding edge, the bottom end of the first antenna surrounding edge is connected with the top end of the second antenna surrounding edge, the bottom end of the second antenna surrounding edge is connected with the top end of the main reflecting surface, and the center of the bottom of the main reflecting surface is provided with the feed source assembly in a penetrating mode; the first antenna surrounding edge and the second antenna surrounding edge are both cylindrical surfaces and have the same caliber; the suppression angle of the antenna is less than or equal to 40 degrees; the suppression angle is an included angle between a straight line determined by the phase center point of the feed source assembly and any point of the top end edge of the first antenna surrounding edge and the central axis of the feed source assembly.
With the antenna provided by the first aspect, the first antenna perimeter and the second antenna perimeter are detachable independent components. When the microwave antennas with different interference levels are realized, the whole antenna does not need to be replaced, and the effective height of the antenna surrounding edge is changed only by adding or removing the first antenna surrounding edge, so that the microwave antennas with different interference resistance levels can be realized, and the cost for replacing the antenna is reduced. Moreover, the antenna that this embodiment provided, antenna house, first antenna surrounding edge, second antenna surrounding edge, main reflection plane and feed source subassembly all are applicable to two at least communication frequency channels in the microwave communication, have improved the commonality of antenna.
Optionally, in a possible implementation manner of the first aspect, the suppression angle is smaller than or equal to a first preset angle and larger than or equal to a second preset angle; the first preset angle is greater than or equal to 30 degrees and less than or equal to 40 degrees, and the second preset angle is greater than or equal to 30 degrees and less than or equal to 35 degrees.
By the antenna provided by the possible embodiment, on the basis of realizing the Class4 requirement defined by ETSI, the height of the surrounding edge of the antenna is reduced, so that the cost of the antenna is reduced.
Optionally, in a possible implementation manner of the first aspect, a bottom end of the first antenna peripheral edge is embedded in a top end of the second antenna peripheral edge.
Optionally, in a possible implementation manner of the first aspect, the height of the second antenna peripheral edge is less than or equal to 35 mm and greater than or equal to 25 mm.
Optionally, in a possible implementation manner of the first aspect, an aperture of the first antenna peripheral edge or the second antenna peripheral edge is greater than or equal to 340 mm and less than or equal to 380 mm, and a distance between a top end of the first antenna peripheral edge and a bottom end of the second antenna peripheral edge is less than or equal to 180 mm and greater than or equal to 160 mm.
Optionally, in a possible implementation manner of the first aspect, an aperture of the first antenna peripheral edge or the second antenna peripheral edge is greater than or equal to 610 mm and less than or equal to 640 mm, and a distance between a top end of the first antenna peripheral edge and a bottom end of the second antenna peripheral edge is less than or equal to 250 mm and greater than or equal to 270 mm.
Optionally, in a possible implementation manner of the first aspect, both the upper surface and the lower surface of the radome are planar.
By the antenna provided by the possible embodiment, when the antenna is applied to at least two different frequency bands of microwave communication, the universality of the size of the antenna cover is ensured, and the universality of the antenna is improved.
Optionally, in a possible implementation manner of the first aspect, a thickness of the radome is greater than or equal to 25 mm and less than or equal to 35 mm.
Optionally, in a possible implementation manner of the first aspect, the focal ratio of the main reflecting surface is greater than or equal to 0.15 and less than or equal to 0.18, and the offset of the main reflecting surface is greater than or equal to 3 mm and less than or equal to 6 mm; the focal length ratio is the ratio of the caliber of the top end edge of the main reflecting surface to the focal length of the main reflecting surface, and the offset is used for indicating the transverse offset degree of the focal point of the main reflecting surface.
Optionally, in a possible implementation manner of the first aspect, a wave-absorbing layer is disposed on an inner wall of the first antenna peripheral edge and/or the second antenna peripheral edge.
By the antenna provided by the possible embodiment, the performance of receiving signals by the antenna is further improved by arranging the wave absorbing layer.
Optionally, in a possible implementation manner of the first aspect, the feed source assembly includes a sub-reflecting surface, a medium radiation head, a circular waveguide and a feed source base; one end of the circular waveguide tube is inserted in the feed source base, one end of the medium radiation head is inserted in the other end of the circular waveguide tube, and the other end of the medium radiation head is connected with the sub-reflecting surface; the sub-reflecting surface comprises a bottom surface and a plurality of concentrically arranged truncated cone-shaped side surfaces with gradually increasing sizes; wherein, the calibers of the connecting parts of the two adjacent circular truncated cone-shaped side surfaces are the same.
According to the antenna provided by the possible embodiment, the shaped sub-reflecting surfaces with gradually increasing openings are arranged, so that electromagnetic waves can be guided to radiate towards two sides of the waveguide tube, and the radiation effect is improved.
Optionally, in a possible embodiment of the first aspect, the bottom surface is a circular plane.
The antenna provided by the possible implementation mode can reduce the processing difficulty and improve the electroplating precision by setting the bottom surface of the sub-reflecting surface as a plane.
Alternatively, in a possible embodiment of the first aspect, the joint of two adjacent truncated cone-shaped side surfaces is chamfered by a chamfering process.
Optionally, in a possible implementation manner of the first aspect, a radius of the chamfer is greater than or equal to 0.5 mm and less than or equal to 1 mm.
Alternatively, in a possible embodiment of the first aspect, the other end of the dielectric radiation head has an end face matching the shape of the sub-reflecting face.
With the antenna provided by this possible embodiment, the other end of the dielectric radiation head has an end face matching the shape of the sub-reflecting surface, so that the connection stability between the sub-reflecting surface and the dielectric radiation head is improved.
Optionally, in one possible implementation of the first aspect, the media radiation head includes an outer media radiation head located outside the circular waveguide and an inner media radiation head located inside the circular waveguide; the lateral surface of the outer media-radiation head includes a plurality of cylindrical surfaces of gradually decreasing diameter and a plurality of cylindrical surfaces of gradually increasing diameter in a direction from the other end of the media-radiation head to one end of the media-radiation head.
With the antenna provided by the possible implementation mode, the diameter of the stepped shaping adopted by the outer medium radiation head is gradually reduced and then gradually increased, so that a primary feed source radiation pattern meeting specific requirements can be optimized.
Alternatively, in a possible embodiment of the first aspect, a diameter of a cylindrical surface of a side surface of the outer medium radiation head closest to the circular waveguide is larger than a diameter of the circular waveguide.
With the antenna provided by this possible embodiment, the diameter of the cylindrical surface closest to the circular waveguide in the side surface of the outer-medium radiation head is larger than the diameter of the circular waveguide, further fixing and sealing the circular waveguide.
Optionally, in a possible implementation manner of the first aspect, the number of cylindrical surfaces included in the side surface of the outer-medium radiation head is greater than or equal to 6 and less than or equal to 12.
In a second aspect, embodiments of the present application provide a feed source assembly, including: the device comprises an auxiliary reflecting surface, a medium radiation head, a circular waveguide tube and a feed source base; one end of the circular waveguide tube is inserted in the feed source base, one end of the medium radiation head is inserted in the other end of the circular waveguide tube, and the other end of the medium radiation head is connected with the subreflector; the sub-reflecting surface comprises a circular bottom surface and a plurality of concentrically arranged truncated cone-shaped side surfaces with gradually increasing sizes; wherein, the calibers of the connecting parts of the two adjacent circular truncated cone-shaped side surfaces are the same.
Alternatively, in a possible embodiment of the second aspect, the bottom surface is a circular plane.
Alternatively, in a possible embodiment of the second aspect, the joint of two adjacent truncated cone-shaped side surfaces is chamfered by a chamfering process.
Optionally, in a possible embodiment of the second aspect, the radius of the chamfer is greater than or equal to 0.5 mm and less than or equal to 1 mm.
Alternatively, in a possible embodiment of the second aspect, the other end of the dielectric radiation head has an end face matching the shape of the sub-reflecting face.
Optionally, in a possible implementation manner of the second aspect, the medium radiation head comprises an outer medium radiation head located outside the circular waveguide and an inner medium radiation head located inside the circular waveguide; the lateral surface of the outer-media radiation head includes a plurality of cylindrical surfaces of gradually decreasing diameter and a plurality of cylindrical surfaces of gradually increasing diameter in a direction from the other end of the media radiation head to one end of the media radiation head.
Alternatively, in a possible embodiment of the second aspect, a diameter of a cylindrical surface of a side surface of the outer medium radiation head closest to the circular waveguide is larger than a diameter of the circular waveguide.
Optionally, in a possible implementation of the second aspect, the number of cylindrical surfaces included in the side surface of the outer-media radiation head is greater than or equal to 6 and less than or equal to 12.
The embodiment of the application provides an antenna and a feed source assembly. Wherein, the antenna includes: the antenna comprises an antenna housing, a first antenna surrounding edge, a second antenna surrounding edge, a main reflecting surface and a feed source assembly. The main reflecting surface is suitable for at least two communication frequency bands in microwave communication. The antenna house sets up on the top of first antenna surrounding edge, and the bottom of first antenna surrounding edge is connected with the top of second antenna surrounding edge, and the bottom of second antenna surrounding edge is connected with the top of main reflecting surface, and the center of the bottom of main reflecting surface runs through and is provided with feed source subassembly. The first antenna surrounding edge and the second antenna surrounding edge are both cylindrical surfaces and have the same caliber. The suppression angle of the antenna is smaller than or equal to a first preset angle. The suppression angle is an included angle between a straight line determined by the phase center point of the feed source assembly and any point of the top edge of the first antenna surrounding edge and the central axis of the feed source assembly. The antenna provided by the embodiment of the application can be suitable for at least two communication frequency bands in microwave communication. Wherein, first antenna surrounding edge and second antenna surrounding edge are detachable independent parts. When the microwave antennas with different interference levels are realized, the whole antenna does not need to be replaced, the effective height of the surrounding edge of the antenna is changed only by adding or removing the first antenna surrounding edge, and the microwave antennas with different interference resistance levels can be realized, so that the cost for replacing the antenna is reduced, and the smooth upgrading of the antennas with different levels is realized.
Drawings
Fig. 1 is a schematic structural diagram of an antenna provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a suppression angle of an antenna according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a structural change of an antenna in a process of upgrading a C3 microwave antenna to a C4 microwave antenna according to an embodiment of the present application;
fig. 4 is an envelope diagram of a C3 microwave antenna provided in an embodiment of the present application;
fig. 5 is an envelope diagram of a C3 microwave antenna provided in an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a feed source assembly provided by an embodiment of the present application;
fig. 7 is an enlarged schematic view of the region a in fig. 6.
Detailed Description
The antenna and the feed source assembly provided by the embodiment of the application can be applied to microwave communication. The antenna and feed assembly provided by the present application is described below with specific embodiments.
Fig. 1 is a schematic structural diagram of an antenna provided in an embodiment of the present application. As shown in fig. 1, the antenna provided in this embodiment may include: the antenna comprises a radome 11, a first antenna peripheral edge 12, a second antenna peripheral edge 13, a main reflecting surface 14 and a feed source assembly 15.
Wherein the main reflective surface 14 is adapted for at least two communication bands in microwave communication.
The antenna housing 11 is arranged at the top end of the first antenna surrounding edge 12, the bottom end of the first antenna surrounding edge 12 is connected with the top end of the second antenna surrounding edge 13, the bottom end of the second antenna surrounding edge 13 is connected with the top end of the main reflecting surface 14, and the center of the bottom of the main reflecting surface 14 is provided with the feed source assembly 15 in a penetrating mode. The first antenna surrounding edge 12 and the second antenna surrounding edge 13 are both cylindrical surfaces and have the same caliber.
The suppression angle of the antenna is smaller than or equal to a first preset angle. The suppression angle is an included angle between a straight line determined by the phase center point of the feed source assembly 15 and any point of the top edge of the first antenna surrounding edge 12 and the central axis of the feed source assembly 15.
The antenna provided by the embodiment is a feedback antenna. A backfeed antenna, also called a cassegrain antenna, is a commonly used antenna in microwave communications.
In this embodiment, the antenna may include a radome 11, a first antenna peripheral edge 12, a second antenna peripheral edge 13, and a main reflection surface 14, and a feed component 15 is disposed through a center of a bottom of the main reflection surface 14. The first antenna surrounding edge 12 and the second antenna surrounding edge 13 are two independent components, which are cylindrical surfaces and have the same caliber. The first antenna perimeter 12 and the second antenna perimeter 13 may be joined together to form a perimeter of the antenna, or may be separated so as not to be joined together. In the present embodiment, the radome 11, the first antenna peripheral edge 12, the second antenna peripheral edge 13, and the main reflection surface 14 having the same aperture may be applied to at least two communication bands in microwave communication. In the description of the embodiments of the present application, "at least two" means two or more than two. The present embodiment does not limit the specific number of communication bands and the band range of each communication band. For example, the number of communication bands is 2, and the frequency bands are in the ranges of 6 to 42GHz and 71 to 86GHz, respectively. For another example, microwave communication includes a frequency range of typically 6 to 86GHz, and the at least two communication frequency bands may be at least two frequency ranges of any of 6 to 86GHz.
The antenna provided by the embodiment can actually have the following two structures in different application scenarios.
In a first application scenario, the first antenna perimeter 12 and the second antenna perimeter 13 are connected together to form the perimeter of the antenna. At this time, the antenna includes: the antenna comprises a radome 11, a first antenna peripheral edge 12, a second antenna peripheral edge 13, a main reflecting surface 14 and a feed source assembly 15. The antenna housing 11 is arranged at the top end of the first antenna surrounding edge 12, the first antenna surrounding edge 12 is connected with the second antenna surrounding edge 13, and the second antenna surrounding edge 13 is connected with the main reflecting surface 14.
In this scenario, the top end of the antenna perimeter is the top end of the first antenna perimeter 12, and the bottom end of the antenna perimeter is the bottom end of the second antenna perimeter 13. The effective height of the surrounding edge of the antenna is the distance between the top end of the first antenna surrounding edge 12 and the bottom end of the second antenna surrounding edge 13 after the first antenna surrounding edge 12 and the second antenna surrounding edge 13 are connected. The suppression angle of the antenna is smaller than or equal to a first preset angle.
For example, the suppression angle of the antenna can be referred to as the angle θ in fig. 2. Fig. 2 is a schematic view of a suppression angle of an antenna according to an embodiment of the present application.
In fig. 2, point O represents the phase center point of the feed assembly 15. The straight line defined by the point O and any one point of the top edge of the surrounding edge of the antenna may be referred to as a1. The central axis of the feed assembly 15 may be referred to as a2. With the point O as the vertex, the angle between a1 and a2 may be referred to as the suppression angle of the antenna, and is denoted by θ. The suppression angle θ of the antenna can be determined by the following equation.
Where h denotes the effective height of the antenna's perimeter, f denotes the focal length of the main reflector 14, D denotes the aperture of the antenna's perimeter or the aperture of the top edge of the main reflector 14, f D The focal ratio of the main reflecting surface 14 is shown.
See, f, h, D, f D The suppression angle theta of the antenna can be different. In general, the larger the focal length ratio of the main reflecting surface 14, the higher the peripheral edge of the antennaThe larger the degree is, the smaller the suppression angle of the antenna is, the stronger the capability of the antenna for suppressing the level value of the far area of the directional diagram is, and the stronger the anti-interference capability of the antenna is. However, the larger the height of the surrounding edge of the antenna, the higher the manufacturing cost of the antenna. Based on the anti-interference capability and the manufacturing cost of the antenna, the parameters can adopt different values. Optionally, the focal ratio of the main reflective surface 14 is greater than or equal to 0.15 and less than or equal to 0.18. For example, D =360mm, f =57.6mm, h =170mm, f = D =36 ° when = 0.16.
It should be noted that, in this embodiment, a specific value of the first preset angle is not limited.
Optionally, in order to achieve the Class4 requirement defined by ETSI, the first preset angle may be greater than or equal to 30 degrees and less than or equal to 40 degrees. For example, when the first preset angle is 36 degrees, the suppression angle of the antenna may be less than or equal to 36 degrees.
Optionally, the suppression angle of the antenna may be greater than or equal to a second preset angle, and the second preset angle is smaller than the first preset angle.
In particular, the higher the height of the perimeter of the antenna, the greater the cost of the antenna. In order to reduce the cost of the antenna on the basis of realizing the Class4 requirement defined by ETSI, the suppression angle of the antenna may be greater than or equal to a second preset angle.
The specific value of the second preset angle is not limited in this embodiment. Optionally, the second preset angle may be greater than or equal to 30 degrees and less than or equal to 35 degrees. For example, when the first preset angle is 36 degrees and the second preset angle is 31 degrees, the suppression angle of the antenna may be greater than or equal to 31 degrees and less than or equal to 36 degrees.
In a second application scenario, the first antenna perimeter 12 and the second antenna perimeter 13 are not connected. At this time, the antenna includes: a radome 11, a second antenna skirt 13, a primary reflector 14, and a feed assembly 15. The radome 11 is disposed on the top end of the second antenna peripheral edge 13, and the second antenna peripheral edge 13 is connected to the main reflection surface 14.
In this scenario, the top end of the surrounding edge of the antenna is the top end of the second antenna surrounding edge 13, and the bottom end of the surrounding edge of the antenna is the bottom end of the second antenna surrounding edge 13. The effective height of the antenna's perimeter is the height of the second antenna perimeter 13.
The difference between the two antenna configurations is whether the first antenna peripheral edge 12 is included, and the same is that the dimensions of the radome 11, the second antenna peripheral edge 13, the main reflector 14 and the feed assembly 15 are the same. Compared with the second application scenario, in the first application scenario, the antenna comprises the first antenna surrounding edge 12, the effective height of the surrounding edge of the antenna is higher, the suppression angle of the antenna is smaller, and the anti-interference capability of the antenna is stronger. For example, the antenna of the second application scenario may implement a C3 microwave antenna defined by ETSI, and the antenna of the first application scenario may implement a C4 microwave antenna defined by ETSI.
It can be seen that the antenna provided by this embodiment can be applied to at least two communication frequency bands in microwave communication. The first antenna surrounding edge and the second antenna surrounding edge are detachable independent components. When the microwave antennas with different interference levels are realized, the whole antenna does not need to be replaced, the effective height of the surrounding edge of the antenna is changed only by adding or removing the first antenna surrounding edge, and the microwave antennas with different interference resistance levels can be realized, so that the cost for replacing the antenna is reduced, and the smooth upgrading of the antennas with different levels is realized. Moreover, the antenna that this embodiment provided, antenna house, first antenna surrounding edge, second antenna surrounding edge, main reflection face and feed subassembly all are applicable to two at least communication frequency channels in the microwave communication, and the specification is unified, and the production, installation and the maintenance of the antenna of being convenient for have improved the commonality of antenna.
Next, referring to fig. 3, taking the antenna structure of the second application scenario as an example to implement a C3 microwave antenna, and taking the antenna structure of the first application scenario as an example to implement a C4 microwave antenna, an operation process of upgrading the C3 microwave antenna to the C4 microwave antenna is exemplarily described.
As shown in fig. 3 (a), the C3 microwave antenna may include a radome 11, a second antenna skirt 13, a main reflective surface, and a feed assembly. When it is necessary to replace the C3 microwave antenna with the C4 microwave antenna, as shown in fig. 3 (b), first, the radome 11 is detached. Subsequently, as shown in fig. 3 (c), the first antenna peripheral edge 12 having the same caliber as that of the second antenna peripheral edge 13 is added. Finally, as shown in fig. 3 (d), after the first antenna peripheral edge 12 is connected to the second antenna peripheral edge 13, a C4 microwave antenna can be formed. The effective height of the surrounding edge of the C4 microwave antenna is the effective height of the first antenna surrounding edge 12 after being connected with the second antenna surrounding edge 13.
Therefore, the process of replacing the antenna is simple in engineering, the replacement cost of the antenna is reduced, and smooth upgrade from the C3 microwave antenna to the C4 microwave antenna is realized.
Next, referring to fig. 3 to 5, an envelope diagram when the C3 microwave antenna is upgraded to the C4 microwave antenna by using the antenna replacing manner shown in fig. 3 as an example will be described.
It is assumed that the diameters of the first antenna peripheral edge 12, the second antenna peripheral edge 13, and the top edge of the main reflection surface 14 are 0.3m, the second antenna peripheral edge 13 in the c3 microwave antenna is 30mm, and the sum of the effective heights of the first antenna peripheral edge 12 and the second antenna peripheral edge 13 in the c4 microwave antenna is 170mm. The frequency band used by the C3 microwave antenna and the C4 microwave antenna is 23GHz.
By actually measuring the antenna, the radiation pattern of the C3 microwave antenna is shown as a solid line in fig. 4, and meets the envelope requirement of the ETSI C3 standard. In FIG. 4, the dashed line represents the ETSI EN 302-4-2 V1.5.1 Range3, class3 envelope. The radiation pattern of the C4 microwave antenna, as shown by the solid line in fig. 5, meets the envelope requirements of the ETSI C4 standard. In FIG. 5, the dashed line represents the ETSI EN 302-4-2 V1.5.1 Range3, class4 envelope. In fig. 4 and 5, the abscissa is the observation angle, specifically, the suppression angle of the antenna, and the unit is degree. The ordinate is the level value, which refers to the radiation intensity, in dB.
It should be noted that in this embodiment, a connection manner between the antenna cover 11 and the first antenna peripheral edge 12 or the second antenna peripheral edge 13, a connection manner between the first antenna peripheral edge 12 and the second antenna peripheral edge 13, and a connection manner between the second antenna peripheral edge 13 and the main reflection surface 14 are not limited.
For example, the second antenna surrounding edge 13 and the main reflecting surface 14 may be connected by welding, adhesive, or the like, or may be integrally formed. For another example, as shown in fig. 3 (c), the bottom end of the first antenna peripheral edge 12 may be embedded in the top end of the second antenna peripheral edge 13.
In the present embodiment, the material of the radome 11, the first antenna peripheral edge 12, the second antenna peripheral edge 13, and the main reflection surface 14 is not limited.
For example, the radome 11 may be a foam radome 11. The first antenna peripheral edge 12, the second antenna peripheral edge 13 and the main reflecting surface 14 are all made of metal, for example, aluminum material.
It should be noted that the implementation manner of the feed source component 15 is not limited in this embodiment. For example. The feed assembly 15 may be a splash plate feed.
It should be noted that, in this embodiment, specific values of the thickness of the radome 11 are not limited, and different thicknesses may be adopted based on the requirements of reliability of the radome such as load bearing, wind resistance, and pressure resistance in practical application and based on the consideration of cost.
Optionally, the thickness of the radome 11 is greater than or equal to 25 mm and less than or equal to 35 mm. For example, it may be 30 mm.
In the present embodiment, the shape of the radome 11 is not limited.
Optionally, both the upper surface and the lower surface of the radome 11 are planar.
Through setting up to the plane, can ensure the commonality of antenna house size when the antenna is applied to two at least different frequency channels of microwave communication, improve the commonality of antenna.
In the present embodiment, the insertion loss of the antenna cover 11 is not limited. The insertion loss may be referred to as an insertion loss, and is a loss of load power occurring somewhere in the transmission system due to insertion of an element or device. For example, the insertion loss of the radome may be less than 0.3dB.
It should be noted that, in this embodiment, specific values of the height of the second antenna peripheral edge 13 are not limited, and may be different according to the anti-interference performance of the antenna and the different calibers of the second antenna peripheral edge 13.
Alternatively, the height of the second antenna peripheral edge 13 may be less than or equal to 35 mm and greater than or equal to 25 mm. For example, when the aperture of the second antenna peripheral edge 13 is 0.3m or 0.6 m and the height of the second antenna peripheral edge 13 is 30mm, the C3 level defined by ETSI can be satisfied.
It should be noted that, in this embodiment, specific values of the height of the first antenna surrounding edge 12 are not limited, and may be different according to the interference resistance of the antenna, the aperture of the first antenna surrounding edge 12 or the second antenna surrounding edge 13, and the difference of the height of the second antenna surrounding edge 13.
Optionally, when the aperture of the first antenna peripheral edge 12 or the second antenna peripheral edge 13 is greater than or equal to 340 mm and less than or equal to 380 mm, the distance between the top end of the first antenna peripheral edge 12 and the bottom end of the second antenna peripheral edge 13 is less than or equal to 180 mm and greater than or equal to 160 mm. For example, when the aperture of the first antenna peripheral edge 12 or the second antenna peripheral edge 13 is 0.3m, and the distance between the top end of the first antenna peripheral edge 12 and the bottom end of the second antenna peripheral edge 13 is 170mm, a Class4 (C4) defined by ETSI can be satisfied.
Optionally, the aperture of the first antenna peripheral edge 12 or the second antenna peripheral edge 13 is greater than or equal to 610 mm and less than or equal to 640 mm, and the distance between the top end of the first antenna peripheral edge 12 and the bottom end of the second antenna peripheral edge 13 is less than or equal to 250 mm and greater than or equal to 270 mm. For example, when the aperture of the first antenna peripheral edge 12 or the second antenna peripheral edge 13 is 0.6 m, and the distance between the top end of the first antenna peripheral edge 12 and the bottom end of the second antenna peripheral edge 13 is 260 mm, a Class4 (C4) defined by ETSI can be satisfied.
Optionally, the inner wall of the first antenna surrounding edge 12 and/or the second antenna surrounding edge 13 may be provided with a wave-absorbing layer. In this embodiment, the material and thickness of the wave-absorbing layer are not limited. For example, the thickness of the wave-absorbing layer may be 10 mm or 15 mm.
And by arranging the wave absorbing layer, the side lobe level value of a far zone of the antenna is further inhibited.
It should be noted that, in this embodiment, the shape and the specific size of the curve of the main reflecting surface 14 are not limited, as long as the main reflecting surface is suitable for at least two communication frequency bands in microwave communication.
In general, the shape of the curve of the main reflecting surface 14 may be determined by the focal ratio of the main reflecting surface 14 and the offset of the main reflecting surface 14. Wherein the amount of shift is used to indicate the extent to which the main reflective surface 14 focus is laterally shifted. As described above, the focal ratio of the main reflecting surface 14 may be greater than or equal to 0.15 and less than or equal to 0.18. Alternatively, the offset amount of the main reflecting surface 14 may be greater than or equal to 3 mm and less than or equal to 6 mm. For example, the curve equation for the main reflective surface 14 may be expressed as (x-off) 2 And =4 × f × z. Wherein x and z represent coordinate values of a curve of the main reflecting surface, off represents an offset amount of the main reflecting surface, and f represents a focal length of the main reflecting surface. The embodiment deals with f, off, f D The specific values of (A) are not limited. For example, off =4mm,f D ＝0.16。
The present embodiment provides an antenna, including: the antenna comprises an antenna housing, a first antenna surrounding edge, a second antenna surrounding edge, a main reflecting surface and a feed source assembly. The main reflecting surface is suitable for at least two communication frequency bands in microwave communication. The antenna house sets up on the top of first antenna surrounding edge, and first antenna surrounding edge is connected with the second antenna surrounding edge, and the second antenna surrounding edge is connected with the main reflection face, and the center of the bottom of main reflection face is run through and is provided with the feed subassembly. The first antenna surrounding edge and the second antenna surrounding edge are both cylindrical surfaces and have the same caliber. The suppression angle of the antenna is smaller than or equal to a first preset angle. In the antenna provided by the embodiment, the first antenna surrounding edge and the second antenna surrounding edge are detachable independent components. Through increasing or demolising first antenna surrounding edge, can realize the microwave antenna of different interference levels, reduced the cost of changing the antenna, improved the commonality of antenna.
The embodiment of the application also provides a feed source assembly, and the feed source assembly can be applied to the antennas provided by the embodiments shown in fig. 1 to 5.
Fig. 6 is a schematic structural diagram of a feed source assembly provided in an embodiment of the present application, and fig. 7 is an enlarged schematic diagram of a region a in fig. 6. As shown in fig. 6 and fig. 7, the feed source assembly provided by the present embodiment may include: a sub-reflector 151, a dielectric radiation head 152, a circular waveguide 153 and a feed mount 154.
Wherein, one end of the circular waveguide tube 153 is inserted into the feed base 154, one end of the dielectric radiation head 152 is inserted into the other end of the circular waveguide tube 153, and the other end of the dielectric radiation head 152 is connected with the sub-reflecting surface 151.
The sub-reflecting surface 151 includes a bottom surface 1511 and a plurality of concentrically arranged truncated circular truncated side surfaces 1512 of which the size gradually increases. The diameters of the connecting portions of the two adjacent truncated cone-shaped side surfaces 1512 are the same.
The feed source assembly 15 provided by this embodiment structurally includes a sub-reflecting surface 151, a medium radiation head 152, a circular waveguide 153, and a feed source base 154, which are sequentially connected from top to bottom and have the same rotation axis. The axis of rotation may also be referred to as the center axis of the feed assembly 15. Wherein, the sub-reflecting surface 151 adopts a shaped sub-reflecting surface 151. Specifically, the sub-reflecting surface 151 includes a bottom surface 1511 and a plurality of concentrically arranged truncated circular truncated side surfaces 1512 of which the size gradually increases. The sub-reflecting surface 151 is gradually opened in a direction from bottom to top.
Through setting up the gradually enlarged figuration subreflector of opening, can guide the electromagnetic wave to the radiation of waveguide pipe both sides, promoted the radiation effect.
It should be noted that, in the present embodiment, the specific number of the truncated cone-shaped side faces 1512 included in the sub-reflecting surface 151 and the height of each truncated cone-shaped side face 1512 are not limited.
Alternatively, the number of the truncated cone-shaped sides 1512 may be greater than or equal to 3 and less than or equal to 6. For example, in fig. 6 and 7, the number of the truncated-cone-shaped side faces 1512 is 4.
In the present embodiment, the shape of the bottom surface 1511 of the sub-reflecting surface 151 is not limited.
Alternatively, the bottom surface 1511 of the sub-reflecting surface 151 may be a circular plane.
The bottom surface of the auxiliary reflecting surface is a plane, so that the processing difficulty can be reduced, and the electroplating precision is improved.
Alternatively, the junction between two adjacent truncated cone-shaped side surfaces 1512 on the sub-reflecting surface 151 may be chamfered by a chamfering process. In this embodiment, the size of the chamfer is not limited.
Alternatively, the radius of the chamfer may be greater than or equal to 0.5 mm and less than or equal to 1 mm. By chamfering, the processing quality can be improved.
In the present embodiment, the materials of the sub-reflecting surface 151, the dielectric radiation head 152, the circular waveguide 153, and the feed base 154 are not limited.
Alternatively, the sub-reflecting surface 151 may be made of a metal material.
Alternatively, the sub-reflecting surface 151 may be formed by spraying metal powder on an end surface of the dielectric radiation head 152 connected to the sub-reflecting surface 151.
Alternatively, the dielectric radiation head 152 may be formed of a dielectric material with stable dielectric constant, low loss and good mechanical properties, for example, any one of teflon, polystyrene and polycarbonate.
Alternatively, the circular waveguide 153 may be made of a metal material having high conductivity, a low thermal expansion coefficient, and a low cost, such as pure copper, alloy copper, pure aluminum, die-cast aluminum, and the like. Alternatively, the mode of the circular waveguide 153 may be TE11.
Alternatively, a protective layer may be provided on the inner surface of the sub-reflecting surface 151.
The inner surface of the sub-reflecting surface 151 refers to a side of the sub-reflecting surface 151 facing an opening of the sub-reflecting surface 151. Through setting up the protective layer, can prevent that the internal surface of subreflector from receiving the corruption to for the subreflector provides the protection, promoted the stability of feed subassembly's performance.
In the present embodiment, the material and thickness of the protective layer are not limited. For example, the protective layer may be an oily protective paint.
Alternatively, in order to improve the stability of the connection between the sub-reflecting surface 151 and the dielectric radiation head 152, the end surface of the dielectric radiation head 152 connected to the sub-reflecting surface 151 may have an end surface matching the shape of the sub-reflecting surface 151.
Specifically, the sub-reflecting surface 151 includes a bottom surface 1511 and a plurality of concentrically arranged truncated circular truncated side surfaces 1512 of which the size gradually increases. Accordingly, the end surface of the dielectric radiation head 152 connected to the sub-reflecting surface 151 also has a bottom surface and a plurality of concentrically arranged truncated cone-shaped side surfaces of gradually increasing size. Wherein the bottom surface on the end surface and the bottom surface 1511 may be the same in shape and size. The number of truncated cone shaped sides on the end face is the same as the number of truncated cone shaped sides 1512. The shape and size of each of the frustoconical sides on the end face may be the same as the shape and size of the corresponding frustoconical side 1512.
Alternatively, the media radiation head 152 may comprise an outer media radiation head 1521 positioned outside the circular waveguide 153 and an inner media radiation head 1522 positioned inside the circular waveguide 153. The lateral surface of the outer media radiation head 1521 includes a plurality of cylindrical surfaces of gradually decreasing diameter and a plurality of cylindrical surfaces of gradually increasing diameter in a direction from the other end of the media radiation head 152 to one end of the media radiation head 152.
In particular, the media radiation head 152 includes an outer media radiation head 1521 and an inner media radiation head 1522. The outer dielectric radiation head 1521 is positioned outside the circular waveguide 153, and the inner dielectric radiation head 1522 is inserted into the circular waveguide 153. The sides of the outer media radiation head 1521 may be stepped. In the present embodiment, an end of the dielectric radiation head 152 connected to the circular waveguide 153 is referred to as an end of the dielectric radiation head 152, and an end of the dielectric radiation head 152 connected to the sub-reflecting surface 151 is referred to as the other end of the dielectric radiation head 152. The sides of the outer media radiation head 1521 include a plurality of cylindrical surfaces of decreasing diameter and a plurality of cylindrical surfaces of increasing diameter in the direction from the other end of the media radiation head 152 to the one end of the media radiation head 152.
The diameter of the stepped shape adopted by the outer medium radiation head is gradually reduced and then gradually increased, so that a primary feed source radiation pattern meeting specific requirements can be optimized.
Optionally, the side of the inner media radiation head 1522 may also be shaped in a step. The sides of the inner media radiation head 1522 may include a plurality of cylindrical surfaces of different diameters.
It should be noted that, in this embodiment, the number of cylindrical surfaces included in the side surface of the outer medium radiation head 1521, the depth and the width of each cylindrical surface are not limited, and the design can be flexibly performed according to the requirements of the radiation amplitude and the phase pattern of the feed source. In this embodiment, the number of cylindrical surfaces included in the side surface of the inner medium radiation head 1522, and the depth and width of each cylindrical surface are not limited, and the design can be flexibly performed according to the fixing requirement between the inner medium radiation head 1522 and the circular waveguide 153, the impedance matching requirement, and the like. The depth of the cylindrical surface may also be referred to as the height of the cylindrical surface, and refers to the distance of the cylindrical surface in the axial direction. The width of the cylindrical surface refers to the distance of the cylindrical surface in the direction perpendicular to the axis, and can also be defined by the inner diameter, the outer diameter, the caliber and the like of the cylindrical surface.
Optionally, the number of cylindrical surfaces included in the side surfaces of the outer media radiation head 1521 may be greater than or equal to 6 and less than or equal to 12.
Optionally, the number of cylindrical surfaces included in the side surfaces of the inner and outer media radiation heads 1521 may be greater than or equal to 4 and less than or equal to 6.
For example, in fig. 6 and 7, the number of cylindrical surfaces included in the side of the outer media radiation head 1521 is 9, and the number of cylindrical surfaces included in the side of the inner media radiation head 1522 is 6.
Alternatively, in order to fix and seal the circular waveguide 153, the diameter of the cylindrical surface of the side surface of the outer-medium radiating head 1521 closest to the circular waveguide 153 is larger than the diameter of the circular waveguide 153.
Optionally, in order to improve the stability of the connection between the inner medium radiation head 1522 and the circular waveguide 153, the outer diameter of the cylindrical surface closest to the outer medium radiation head 1521 in the side surface of the inner medium radiation head 1522 is equal to or slightly greater than the inner diameter of the circular waveguide 153, so that the outer wall of the cylindrical surface closest to the outer medium radiation head 1521 is in close contact with the inner wall of the circular waveguide 153.
Optionally, a glue groove may be disposed in the middle of the cylindrical surface of the side surface of the inner media radiation head 1522 closest to the outer media radiation head 1521.
By injecting the adhesive into the adhesive groove, the connection stability between the inner medium radiation head and the circular waveguide tube can be further improved.
The embodiment is not limited to the implementation manner of the adhesive. For example, super X8008 black glue.
The present embodiments provide a feed assembly comprising: the device comprises an auxiliary reflecting surface, a medium radiation head, a circular waveguide tube and a feed source base. One end of the circular waveguide tube is inserted into the feed source base, one end of the medium radiation head is inserted into the other end of the circular waveguide tube, and the other end of the medium radiation head is connected with the sub-reflecting surface. The sub-reflecting surface includes a bottom surface and a plurality of concentrically arranged truncated cone-shaped side surfaces of gradually increasing size. Wherein, the calibers of the connecting parts of the two adjacent circular truncated cone-shaped side surfaces are the same. The feed source assembly provided by the embodiment can be suitable for at least two communication frequency bands in microwave communication. Through setting up the figuration subreflector that the opening is crescent, can guide the electromagnetic wave to the radiation of wave guide both sides, promoted the radiation effect.
Claims (17)
1. An antenna, comprising: the antenna comprises an antenna housing, a first antenna surrounding edge, a second antenna surrounding edge, a main reflecting surface and a feed source assembly; the main reflecting surface is suitable for at least two communication frequency bands in microwave communication;
the first antenna surrounding edge is a detachable independent part;
the antenna housing is arranged at the top end of the first antenna surrounding edge, the bottom end of the first antenna surrounding edge is connected with the top end of the second antenna surrounding edge, the bottom end of the second antenna surrounding edge is connected with the top end of the main reflecting surface, and the feed source assembly penetrates through the center of the bottom of the main reflecting surface; the first antenna surrounding edge and the second antenna surrounding edge are both cylindrical surfaces and have the same caliber;
the suppression angle of the antenna is less than or equal to 40 degrees; the suppression angle is an included angle between a straight line determined by the phase center point of the feed source component and any point of the top edge of the first antenna surrounding edge and the central axis of the feed source component;
the feed source assembly comprises an auxiliary reflecting surface, a medium radiation head, a circular waveguide tube and a feed source base, wherein a protective layer is arranged on the inner surface of the auxiliary reflecting surface, and the inner surface of the auxiliary reflecting surface is one side of an opening, facing the auxiliary reflecting surface, of the auxiliary reflecting surface;
the medium radiation head comprises an outer medium radiation head positioned outside the circular waveguide tube and an inner medium radiation head positioned inside the circular waveguide tube;
the lateral surface of the outer media-radiation head includes a plurality of cylindrical surfaces of gradually decreasing diameter and a plurality of cylindrical surfaces of gradually increasing diameter in a direction from the other end of the media-radiation head to one end of the media-radiation head.
2. The antenna of claim 1, wherein the suppression angle is less than or equal to a first predetermined angle and greater than or equal to a second predetermined angle; the first preset angle is greater than or equal to 30 degrees and less than or equal to 40 degrees, and the second preset angle is greater than or equal to 30 degrees and less than or equal to 35 degrees.
3. The antenna of claim 1, wherein a bottom end of the first antenna perimeter is embedded in a top end of the second antenna perimeter.
4. The antenna of any one of claims 1 to 3, wherein the height of the second antenna perimeter is less than or equal to 35 mm and greater than or equal to 25 mm.
5. The antenna according to any one of claims 1 to 3, wherein the aperture of the first antenna peripheral edge or the second antenna peripheral edge is greater than or equal to 340 mm and less than or equal to 380 mm, and the distance between the top end of the first antenna peripheral edge and the bottom end of the second antenna peripheral edge is less than or equal to 180 mm and greater than or equal to 160 mm.
6. The antenna according to any one of claims 1 to 3, wherein the aperture of the first antenna peripheral edge or the second antenna peripheral edge is greater than or equal to 610 mm and less than or equal to 640 mm, and the distance between the top end of the first antenna peripheral edge and the bottom end of the second antenna peripheral edge is less than or equal to 250 mm and greater than or equal to 270 mm.
7. An antenna according to any of claims 1 to 3, wherein the upper and lower surfaces of the radome are both planar.
8. An antenna according to any of claims 1 to 3, wherein the thickness of the radome is greater than or equal to 25 mm and less than or equal to 35 mm.
9. The antenna of any one of claims 1 to 3, wherein the ratio of the focal length of the main reflecting surface is greater than or equal to 0.15 and less than or equal to 0.18, and the offset of the main reflecting surface is greater than or equal to 3 mm and less than or equal to 6 mm; the focal length ratio is the ratio of the diameter of the top end edge of the main reflecting surface to the focal length of the main reflecting surface, and the offset is used for indicating the transverse offset degree of the focal point of the main reflecting surface.
10. An antenna according to any one of claims 1 to 3, wherein a wave absorbing layer is provided on an inner wall of the first antenna skirt and/or the second antenna skirt.
11. The antenna according to any one of claims 1 to 10, wherein one end of the circular waveguide tube is inserted into the feed base, one end of the dielectric radiation head is inserted into the other end of the circular waveguide tube, and the other end of the dielectric radiation head is connected with the sub-reflecting surface;
the subreflector comprises a bottom surface and a plurality of concentrically arranged truncated cone-shaped side surfaces with gradually increased sizes; wherein, the calibers of the connecting parts of the two adjacent circular truncated cone-shaped side surfaces are the same.
12. The antenna of claim 11, wherein the bottom surface is a circular plane.
13. The antenna of claim 11, wherein the junction of two adjacent truncated cone-shaped sides is chamfered by a chamfering process.
14. The antenna of claim 13, wherein the radius of the chamfer is greater than or equal to 0.5 mm and less than or equal to 1 mm.
15. The antenna of claim 11, wherein the other end of the dielectric radiation head has an end face matching the shape of the sub-reflecting surface.
16. The antenna of claim 1, wherein a diameter of a cylindrical surface of a side surface of the outer-medium radiating head closest to the circular waveguide is larger than a diameter of the circular waveguide.
17. The antenna of claim 1, wherein the number of cylindrical surfaces included in the side surface of the outer-media radiation head is greater than or equal to 6 and less than or equal to 12.
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| CN201910472293.6A CN112018522B (en) | 2019-05-31 | 2019-05-31 | Antenna and feed assembly |
| PCT/CN2020/092369 WO2020238909A1 (en) | 2019-05-31 | 2020-05-26 | Antenna and feed source assembly |
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| CN115173059A (en) * | 2022-07-22 | 2022-10-11 | 普罗斯通信技术（苏州）有限公司 | Antenna feed source and antenna comprising same |
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| CN105762529A (en) * | 2014-10-14 | 2016-07-13 | 优倍快网络公司 | Parabolic antenna reflection device, installing method thereof, and choke shroud |
| CN108598680A (en) * | 2018-04-26 | 2018-09-28 | 广东通宇通讯股份有限公司 | A kind of E-band high performance antennas |
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| US6037908A (en) * | 1996-11-26 | 2000-03-14 | Thermotrex Corporation | Microwave antenna |
| US7138958B2 (en) * | 2004-02-27 | 2006-11-21 | Andrew Corporation | Reflector antenna radome with backlobe suppressor ring and method of manufacturing |
| CN101615723A (en) * | 2009-08-06 | 2009-12-30 | 北京天瑞星际技术有限公司 | Ultrathin microwave antenna with ultra high performance |
| CN107046177B (en) * | 2016-12-26 | 2023-08-15 | 广东盛路通信科技股份有限公司 | Feed source of back-feed type dual-polarized parabolic antenna |
| CN107528129B (en) * | 2017-07-12 | 2020-01-03 | 广东通宇通讯股份有限公司 | Microwave antenna |
| CN107671163A (en) * | 2017-10-30 | 2018-02-09 | 广东通宇通讯股份有限公司 | Microwave antenna processing method and processing unit (plant) |
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|---|---|---|---|---|
| CN105762529A (en) * | 2014-10-14 | 2016-07-13 | 优倍快网络公司 | Parabolic antenna reflection device, installing method thereof, and choke shroud |
| CN108598680A (en) * | 2018-04-26 | 2018-09-28 | 广东通宇通讯股份有限公司 | A kind of E-band high performance antennas |
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