CN111564696A - FAD antenna array - Google Patents
FAD antenna array Download PDFInfo
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- CN111564696A CN111564696A CN202010256521.9A CN202010256521A CN111564696A CN 111564696 A CN111564696 A CN 111564696A CN 202010256521 A CN202010256521 A CN 202010256521A CN 111564696 A CN111564696 A CN 111564696A
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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
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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Abstract
The embodiment of the invention provides a FAD antenna array, which comprises a reflecting plate and a plurality of radiation units; the reflecting plate comprises a rectangular first sub-plate, a rectangular second sub-plate, a rectangular third sub-plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular third outer plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular first connecting plate and a rectangular second connecting plate; the second sub-board is higher than the first sub-board; the height of the first sub-board is the same as that of the third sub-board; a row of radiating elements is arranged on the first sub-board; two rows of radiation units are arranged on the second sub-board; a row of radiating elements is arranged on the third sub-board; the number of the radiation units included in each row of radiation units is the same; the distance between two adjacent radiation units in each row of radiation units is the same; the distances between two adjacent rows of radiation units are the same; the centers of the first radiating elements in each row of radiating elements are positioned on the same straight line, and the straight line is vertical to the outer edge of the first sub-board. The FAD antenna array provided by the embodiment of the invention can improve the performance of the FAD antenna.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an FAD antenna array.
Background
With the deep coverage of the 4G network, the problems of shortage of space resources of the iron tower of the base station and high site rent are highlighted, and especially in the urban area, no redundant site resources are available. The multi-system and multi-system common station provides a technical foundation, and the multi-port antenna inevitably increases the size of the antenna, and brings difficulty in installation and safety risk. FAD smart antenna is multiport antenna, owing to be 9 port antennas, the array is many, and the size of antenna is great, and weight is heavy, and it is inconvenient to cause the installation, and wind load is big, influences safety. Therefore, the antenna is designed to be more compact, so as to reduce the weight of the antenna and reduce the windward area.
In the prior art, FAD smart antenna's design is generally with dislocation arrangement between oscillator and the oscillator, can be assisted with some boundary structure simultaneously, reduces the coupling between the multiseriate array element that this kind of design brought, but this kind of design has the limitation to the promotion of antenna index, especially on the 3dB lobe width index in horizontal plane. Because the antenna array is close to the transverse distance between the arrays, the mutual coupling effect is large, the width of a 3dB lobe on the horizontal plane is slightly wide in a frequency band, cross-area interference is easily caused, and therefore the performance of an FAD antenna is influenced. Therefore, how to further ensure the antenna performance based on miniaturization has become a problem to be solved in the field.
Disclosure of Invention
The embodiment of the invention provides a FAD antenna array, which is used for solving or at least partially solving the defect of poor performance of the conventional FAD antenna array.
The embodiment of the invention provides a FAD antenna array, which comprises a reflecting plate and a plurality of radiation units;
the reflecting plate comprises a rectangular first sub-plate, a rectangular second sub-plate, a rectangular third sub-plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular third outer plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular first connecting plate and a rectangular second connecting plate;
the outer edge of the first sub-plate is fixedly connected with the first outer plate; the inner edge of the first sub-board is connected with the first edge of the second sub-board through the first connecting plate; the second edge of the second sub-board is connected with the inner edge of the third sub-board through the second connecting plate; the outer edge of the third sub-board is fixedly connected with the second outer board;
the second sub-board is higher than the first sub-board; the height of the first sub-board is the same as that of the third sub-board;
a row of the radiation units is arranged on the first sub-board; two rows of the radiation units are arranged on the second sub-board; a row of the radiation units is arranged on the third sub-board;
the number of the radiation units in each row of the radiation units is the same; the distance between two adjacent radiation units in each row of radiation units is the same;
the distances between the adjacent two rows of radiation units are the same;
the centers of the first radiation units in each row of radiation units are positioned on the same straight line, and the straight line is perpendicular to the outer edge of the first sub-board.
Preferably, the FAD antenna array further comprises partition walls;
the separation wall is perpendicular to the second sub-board and is positioned between two rows of the radiation units on the second sub-board;
the distance between the separation wall and the two rows of radiation units on the second sub-board is equal;
the head end of the separation wall exceeds the first radiation unit in any row of the radiation units on the second sub-board, and the tail end of the separation wall exceeds the last radiation unit in any row of the radiation units on the second sub-board.
Preferably, the partition wall comprises a body and a fixed section which are vertically and fixedly connected;
the body is perpendicular to the second sub-board;
the fixed section is used for fixing the separation wall on the second sub-board.
Preferably, the fixing section includes a convex hull structure, and the partition wall is fixed to the second sub-board in a point contact manner by the convex hull structure.
Preferably, the height difference between the second sub-board and the first sub-board is less than or equal to 0.2 λ; λ is an operating wavelength corresponding to a central operating frequency of the radiation unit.
Preferably, the distance between two adjacent rows of the radiation units is less than or equal to 0.75 lambda; λ is an operating wavelength corresponding to a central operating frequency of the radiation unit.
Preferably, the distance between two adjacent radiation units in any row of radiation units is 105-115 mm.
Preferably, the height of the partition wall is 15mm to 25 mm.
Preferably, the radiating element comprises a coupled feed core and a radiating arm;
the polarization direction of the coupling type feed core and the radiation arm form an included angle of 45 degrees.
Preferably, any one of the radiation units is insulated from the reflection plate.
According to the FAD antenna array provided by the embodiment of the invention, the four sub-array flush straight line arrangement mode is adopted, the second sub-array and the third sub-array are raised relative to the first sub-array and the fourth sub-array, the coupling effect between the sub-arrays can be reduced, the 3dB lobe width of the horizontal plane can be more converged, and the front-to-back ratio of the horizontal plane can be effectively improved, so that the performance of the FAD antenna can be improved, the length and the size of the FAD antenna can be reduced, the FAD antenna is further miniaturized, the station building cost of a mobile communication base station can be reduced, and the FAD antenna array has higher reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in 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 FAD antenna array according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a FAD antenna array according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a partition wall in a FAD antenna array according to an embodiment of the present invention;
fig. 4 is a right side view and a top view of a FAD antenna array provided according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a radiating element in an FAD antenna array according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 order to overcome the above problems in the prior art, an embodiment of the present invention provides an FAD antenna array, which adopts a straight line arrangement form of four sub-arrays, and a manner that a second sub-array and a third sub-array are raised relative to a first sub-array and a fourth sub-array, so as to reduce a coupling effect between the sub-arrays, solve a defect that a 3dB lobe width on a horizontal plane of a directional diagram is slightly wide, optimize a front-to-back ratio, improve stability of third-order intermodulation, have high reliability, and achieve effects of reducing a length of an antenna and improving performance of the antenna.
Fig. 1 is a schematic structural diagram of an FAD antenna array according to an embodiment of the present invention. As shown in fig. 1, the FAD antenna array includes: including a reflection plate 10 and a plurality of radiation units 20.
The reflection plate 10 includes rectangular first sub-plate 101, second sub-plate 102, third sub-plate 103, first outer plate 104, second outer plate 105, first connection plate 106, and second connection plate 107 of the same length.
Specifically, the reflection plate 10 may include 7 portions: a first sub-board 101, a second sub-board 102, a third sub-board 103, a first outer board 104, a second outer board 105, a first connection board 106, and a second connection board 107.
The first sub-board 101, the second sub-board 102, the third sub-board 103, the first outer board 104, the second outer board 105, the first connecting board 106 and the second connecting board 107 are all rectangular, and the lengths of the 7 rectangles are the same.
Preferably, the first sub-board 101 and the third sub-board 103 are equal in width, and the second sub-board 102 is 2 times wider than the first sub-board 101.
The first connecting plate 106 and the second connecting plate 107 are equal in width.
Preferably, the first outer plate 104 and the second outer plate 105 are equal in width.
The outer edge of the first sub-board 101 is fixedly connected with the first outer board 104; the inner edge of the first sub-board 101 is connected with the first edge of the second sub-board 102 through a first connecting board 106; the second edge of the second sub-board 102 is connected with the inner edge of the third sub-board 103 through a second connecting board 107; the outer edge of the third sub-board 103 is fixedly connected to the second sub-board 105.
Specifically, the outer edge and the inner edge of the first sub-board 101 are both rectangular in length, the outer edge is close to the edge of the FAD antenna array, and the inner edge is close to the inside of the FAD antenna array.
Preferably, the outer edge of the first sub-panel 101 is vertically fixedly attached to the first outer panel 104.
Preferably, the inner edge of the first sub-board 101 is vertically fixedly connected to the first edge of the first connection board 106, and the second edge of the first connection board 106 is vertically fixedly connected to the first edge of the second sub-board 102.
The first and second sides of the first connecting plate 106 are both rectangular in length.
The first and second sides of the second sub-board 102 are both rectangular long.
Preferably, the second side of the second sub-board 102 is vertically and fixedly connected to the first side of the second connection board 107, and the second side of the second connection board 107 is vertically and fixedly connected to the inner side of the third sub-board 103.
The first and second sides of the second web 106 are each rectangular in length.
The outer edge and the inner edge of the third sub-board 103 are both rectangular long, the outer edge is close to the edge of the FAD antenna array, and the inner edge is close to the inside of the FAD antenna array.
Preferably, the outer edge of the third sub-panel 103 is fixedly attached perpendicularly to the second sub-panel 105.
It should be noted that the first sub-board 101, the second sub-board 102, the third sub-board 103, the first outer board 104, the second outer board 105, the first connecting board 106, and the second connecting board 107 are located at the head end of the FAD antenna array, and are wide on the same plane, and the first sub-board 101, the second sub-board 102, the third sub-board 103, the first outer board 104, the second outer board 105, the first connecting board 106, and the second connecting board 107 are located at the tail end of the FAD antenna array, and are wide on the same plane.
Preferably, the reflection plate 10 may be formed by integral molding.
The second sub-board 102 is higher than the first sub-board 101; the height of the first sub-board 101 is the same as the height of the third sub-board 103.
Specifically, the first sub-board 101 and the third sub-board 103 are located on the same horizontal plane. The second sub-board 102 is located at a higher level than the first sub-board 101.
The second sub-board 102 is parallel to the first sub-board 101 and also parallel to the third sub-board 103.
When viewed from the left side of the FAD antenna array, the cross section of the reflector plate is a structure shaped like a Chinese character ji, which is formed by wide connection of a first sub-plate 101, a second sub-plate 102, a third sub-plate 103, a first outer plate 104, a second outer plate 105, a first connecting plate 106 and a second connecting plate 107 at the head end of the FAD antenna array and is bent and raised in the middle.
A row of radiating elements is arranged on the first sub-board 101; two rows of radiating elements are arranged on the second sub-board 102; a row of radiating elements is arranged on the third sub-board 103.
Specifically, a row of radiating elements arranged in a straight line is disposed on the first sub-board 101, which is a first sub-array 201.
Two rows of radiating elements, namely a second sub-array 202 and a third sub-array 203, are arranged on the second sub-board 102.
A row of radiating elements arranged in a straight line is arranged on the third sub-board 103, which is a fourth sub-array 204.
It can be understood that, along the width direction of the first sub-board 101, four rows of radiating elements (i.e., four sub-arrays) are a first sub-array 201, a second sub-array 202, a third sub-array 203 and a fourth sub-array 204 in sequence.
The number of the radiation units included in each row of radiation units is the same; the distance between two adjacent radiation units in each row of radiation units is the same.
Specifically, the first subarray 201, the second subarray 202, the third subarray 203, and the fourth subarray 204 each include N identical radiating elements 20. Wherein N is an integer greater than 1.
For the first sub-array 201, the second sub-array 202, the third sub-array 203 and the fourth sub-array 204, the arrangement mode and the direction of the radiation units in the sub-arrays are the same.
For any sub-array, the spacing between any two adjacent radiating elements 20 in the sub-array is the same.
The distance between two radiation elements refers to the distance between the centers of the two radiation elements.
The spacing between two adjacent rows of radiating elements is the same.
Specifically, the spacing between two adjacent rows of radiation elements refers to the horizontal distance between the center lines of two adjacent rows of radiation elements.
The center line of each row of radiating elements refers to the straight line where the N radiating elements 20 of the row are located.
It will be appreciated that the centre lines of the four rows of radiating elements are parallel to each other.
The centers of the first radiating elements in each row of radiating elements are located on the same straight line, and the straight line is perpendicular to the outer edge of the first sub-board 101.
Specifically, for each row of radiating elements, the radiating element closest to the head end of the FAD antenna array is the first radiating element of the row.
The centers of the first radiating units in each row of the four rows of radiating units are positioned on the same straight line, and the straight line is vertical to the central line of each row of radiating units, so that the alignment arrangement of the four rows of radiating units is formed.
It will be appreciated that the centre line of each row of radiating elements is parallel to the outer edge of the first sub-tile 101.
Because the second sub-board 102 is higher than the first sub-board 101, and the height of the first sub-board 101 is the same as that of the third sub-board 103, a way of raising the second sub-array and the third sub-array relative to the first sub-array and the fourth sub-array is formed, which is equivalent to increasing the distance between the first sub-array and the second sub-array and between the third sub-array and the fourth sub-array, so that the coupling effect between the sub-arrays can be reduced, and the 3dB lobe width of the antenna horizontal plane is more convergent.
Different from the common staggered arrangement mode of the radiation units, the embodiment of the invention adopts the flush arrangement mode, so that the length of the FAD antenna can be effectively reduced.
The embodiment of the invention adopts the optimal radiation unit array arrangement mode and the optimal boundary mode, so that the 3dB lobe width of the horizontal plane is more convergent, and the front-to-back ratio of the horizontal plane is effectively improved.
It can be understood that, through reducing coupling effect between subarray and the subarray, the horizontal plane 3dB lobe width converges more and promotes the front-to-back ratio of horizontal plane, can obviously, improve FAD antenna's performance effectively to can guarantee the performance of antenna on the basis that the miniaturization is realized to the antenna, guarantee especially that antenna horizontal plane 3dB lobe width index can not influence because of too wide and cross-area the cover, can extensively be used for mobile communication base station smart antenna.
It should be noted that the FAD antenna array provided in the embodiment of the present invention can be widely used for array antennas such as a FAD smart antenna and a FAD smart antenna fused with the FAD smart antenna, and can be evolved into a fusion antenna, for example, "4 +4+8+ 8" 900/1800 FAD independently electrically-tuned smart antenna.
According to the embodiment of the invention, the four sub-array alignment linear arrangement mode is adopted, the second sub-array and the third sub-array are raised relative to the first sub-array and the fourth sub-array, so that the coupling effect between the sub-arrays can be reduced, the 3dB lobe width of the horizontal plane can be more converged, the front-to-back ratio of the horizontal plane can be effectively improved, the performance of the FAD antenna can be improved, the length and the size of the FAD antenna can be reduced, the further miniaturization of the FAD antenna is realized, the station building cost of a mobile communication base station can be reduced, and the reliability is higher.
Fig. 2 is a schematic structural diagram of an FAD antenna array according to an embodiment of the present invention. Based on the above embodiments, as shown in fig. 2, the FAD antenna array further includes a partition wall 30.
The separation wall 30 is perpendicular to the second sub-panel 102 and is located between two rows of radiating elements on the second sub-panel 102.
Specifically, the isolation wall 30 is located between the second sub-array 202 and the third sub-array 203 for isolating the second sub-array 202 from the third sub-array 203.
Preferably, the partition wall 30 is perpendicular to the second sub-board 102.
The distance between the partition wall 30 and the two rows of radiating elements on the second sub-board 102 is equal.
Specifically, the distance from the partition wall 30 to the second sub-array 202 is equal to the distance from the partition wall to the third sub-array 203.
The distance from the partition wall 30 to the second sub-array 202 refers to the distance from the partition wall to the center line of the second sub-array 202 (i.e., the center line of the row of radiating elements).
The distance from the partition wall 30 to the third sub-array 203 refers to the distance from the partition wall to the center line of the third sub-array 203 (i.e., the center line of the row of radiating elements).
The first end of the partition wall 30 extends beyond the first radiation element in any row of radiation elements on the second daughter board 102, and the second end extends beyond the last radiation element in any row of radiation elements on the second daughter board 102.
Specifically, the head end of the partition wall 30 refers to one end close to the head end of the FAD antenna array; the tail end of the partition wall 30 refers to an end close to the tail end of the FAD antenna array.
The first radiation element in the second sub-array 202 is the radiation element closest to the head end of the FAD antenna array in the second sub-array 202; the last radiation element in the second sub-array 202 is the radiation element closest to the tail end of the FAD antenna array in the second sub-array 202.
The head end of the dividing wall 30 extends beyond the first radiating element in the second sub-array 202. Because the radiating elements have a certain size, the distance between the head end of the partition wall 30 and the head end of the FAD antenna array is smaller than the distance between any point on the first radiating element in the second sub-array 202 and the head end of the FAD antenna array, under the condition that the head end of the partition wall 30 does not exceed the head end of the FAD antenna array.
The end of the isolation wall 30 extends beyond the last radiating element in the second sub-array 202. Because the radiation elements have a certain size, under the condition that the tail end of the partition wall 30 does not exceed the tail end of the FAD antenna array, the distance between the tail end of the partition wall 30 and the tail end of the FAD antenna array is smaller than the distance between any point on the last radiation element in the second sub-array 202 and the tail end of the FAD antenna array.
According to the embodiment of the invention, the second sub-array and the third sub-array are isolated by the isolation wall, so that the coupling effect between the sub-arrays can be effectively reduced, the 3dB lobe width of the horizontal plane of the antenna is more convergent, and the front-to-back ratio of the horizontal plane is improved, thereby improving the performance of the FAD antenna and having higher reliability.
Fig. 3 is a schematic structural diagram of a partition wall in an FAD antenna array according to an embodiment of the present invention. Based on the above embodiments, as shown in fig. 3, the partition wall 30 includes a body 301 and a fixed section 302 that are vertically and fixedly connected.
Specifically, the partition wall 30 may have an "L" shaped structure. The vertical section of the L-shaped structure is a body 301, and the horizontal section is a fixed section 302.
The body 301 is perpendicular to the second sub-board 102.
Specifically, the partition wall 30 is perpendicular to the second sub-board 102, and the finger body 301 is perpendicular to the second sub-board 102.
The fixing section 302 is used to fix the partition wall 30 to the second sub-board 102.
It should be noted that the body 301 is a thin sheet-like structure, so that the partition wall 30 can be fixed on the second sub-board 102 by the fixing section 302, and the body 301 is perpendicular to the second sub-board 102.
According to the embodiment of the invention, the isolation wall is fixed on the second sub-board through the fixing section to form the structure with the body vertical to the second sub-board, so that the second sub-array and the third sub-array can be isolated through the isolation wall, the coupling effect between the sub-arrays can be effectively reduced, the 3dB lobe width of the horizontal plane of the antenna is more convergent, the front-to-back ratio of the horizontal plane is improved, the performance of the FAD antenna is improved, and the FAD antenna has higher reliability.
Based on the above embodiments, as shown in fig. 3, the fixing segment 302 includes the convex hull structure 303, and the partition wall 30 is fixed to the second sub-board 102 in the form of point contact by the convex hull structure 303.
Specifically, the fixed segment 302 includes a small protrusion forming a convex hull structure 303.
The fixing section 302 fixes the partition wall 30 to the reflection plate 10 (specifically, the second sub-plate 102) by the convex hull structure 303.
The fixing of the partition wall 30 to the reflection plate 10 is preferably accomplished by assembling with screws of M4.
Note that, the partition wall 30 is fixed to the second sub-board 102 by the convex hull structure 303, and point contact between the partition wall 30 and the reflection plate 10 is achieved in the form of convex hull contact.
The point contact between the partition wall 30 and the reflection plate 10 is a conductive contact and represents an insulating contact, which can improve the stability of third-order intermodulation.
According to the embodiment of the invention, the partition wall is fixed on the second daughter board in a point contact manner through the convex hull structure, so that the stability of third-order intermodulation can be improved, the performance of the FAD antenna can be improved, and the FAD antenna has higher reliability.
Fig. 4 is a right side view and a top view of an FAD antenna array provided according to an embodiment of the present invention. Based on the contents of the above embodiments, as shown in fig. 4, the height difference between the second sub-board 102 and the first sub-board 101 is less than or equal to 0.2 λ; λ is the operating wavelength corresponding to the central operating frequency of the radiating element.
Specifically, the left image in fig. 4 is a right view of the FAD antenna array provided by the embodiment of the present invention; the right diagram in fig. 4 is a top view of an FAD antenna array provided in an embodiment of the present invention.
The elevation height of the second sub-array and the third sub-array is d0, i.e. the height difference between the second sub-panel 102 and the first sub-panel 101 is d 0.
Preferably, d0 ≦ 0.2 λ.
Wherein λ is an operating wavelength corresponding to a central operating frequency of the radiating element.
According to the embodiment of the invention, the distances between the first sub array and the second sub array and between the third sub array and the fourth sub array are increased by raising the second sub array and the third sub array, so that the coupling effect between the sub arrays can be reduced, the 3dB lobe width of the horizontal plane of the antenna can be more increased, the performance of the FAD antenna can be improved, and the FAD antenna has higher reliability.
Based on the content of the above embodiments, as shown in fig. 4, the spacing between two adjacent rows of radiation units is less than or equal to 0.75 λ; λ is the operating wavelength corresponding to the central operating frequency of the radiating element.
Specifically, the distances between the first sub-array and the second sub-array, between the second sub-array and the third sub-array, and between the third sub-array and the fourth sub-array are all d 1.
Preferably, d1 ≦ 0.75 λ.
Wherein λ is an operating wavelength corresponding to a central operating frequency of the radiating element.
According to the embodiment of the invention, the 3dB lobe width of the horizontal plane can be more converged by optimizing the arrangement mode of the radiation unit array and the optimized boundary mode, the front-to-back ratio of the horizontal plane can be effectively improved, the performance of the FAD antenna can be improved, and the FAD antenna has higher reliability.
Based on the content of the above embodiments, as shown in fig. 4, the distance between two adjacent radiation units in any row of radiation units is 105mm to 115 mm.
Specifically, for any row of radiating elements, the spacing between two adjacent radiating elements in the row of radiating elements is d 2.
Preferably, d2 is more than or equal to 105mm and less than or equal to 115mm
According to the embodiment of the invention, the 3dB lobe width of the horizontal plane can be more converged by optimizing the arrangement mode of the radiation unit array and the optimized boundary mode, the front-to-back ratio of the horizontal plane can be effectively improved, the performance of the FAD antenna can be improved, and the FAD antenna has higher reliability.
Based on the above embodiments, as shown in fig. 4, the height of the partition wall is 15mm to 25 mm.
Preferably, the height of the partition wall is d3, and d3 is more than or equal to 15mm and less than or equal to 25 mm.
According to the embodiment of the invention, the second sub-array and the third sub-array are isolated by the isolation wall with proper height, so that the coupling effect between the sub-arrays can be effectively reduced, the 3dB lobe width of the horizontal plane of the antenna is more convergent, and the front-to-back ratio of the horizontal plane is improved, thereby improving the performance of the FAD antenna and having higher reliability.
Fig. 5 is a schematic structural diagram of a radiating element in an FAD antenna array according to an embodiment of the present invention. Based on the above embodiments, as shown in fig. 5, the radiation unit 20 includes a coupling feed core and a radiation arm 213.
Specifically, the coupled feed includes a first feed 211 and a second feed 212 that are orthogonal and non-conductive with respect to each other.
The first feed core 211 and the second feed core 212 are fixed by an insulated coupling feed core medium 214.
The number of the radiation arms 213 may be four.
The polarization direction of the coupling feed core forms an included angle of 45 degrees with the radiation arm.
Specifically, the polarization direction of the coupling feed core forms an included angle of +/-45 degrees with the radiation arm.
The embodiment of the invention can improve the radiation performance and the directional diagram index of the radiation unit by adopting the coupling type feed core, thereby improving the performance of the FAD antenna.
Based on the above description of the embodiments, any one of the radiation units 20 is insulated from the reflection plate 10.
Specifically, as shown in fig. 5, the radiation unit further includes an insulating pad 215.
And an insulating pad 215 for fixing the radiation unit 20 to the reflection plate 10 and making the radiation unit 20 in insulating contact with the reflection plate 10.
According to the embodiment of the invention, the radiation unit is fixed on the reflecting plate through the insulating pad, and the radiation unit is in insulated contact with the reflecting plate, so that the radiation performance of the radiation unit can be improved, and the performance of the FAD antenna can be improved.
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. An FAD antenna array is characterized by comprising a reflecting plate and a plurality of radiating elements;
the reflecting plate comprises a rectangular first sub-plate, a rectangular second sub-plate, a rectangular third sub-plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular third outer plate, a rectangular first outer plate, a rectangular second outer plate, a rectangular first connecting plate and a rectangular second connecting plate;
the outer edge of the first sub-plate is fixedly connected with the first outer plate; the inner edge of the first sub-board is connected with the first edge of the second sub-board through the first connecting plate; the second edge of the second sub-board is connected with the inner edge of the third sub-board through the second connecting plate; the outer edge of the third sub-board is fixedly connected with the second outer board;
the second sub-board is higher than the first sub-board; the height of the first sub-board is the same as that of the third sub-board;
a row of the radiation units is arranged on the first sub-board; two rows of the radiation units are arranged on the second sub-board; a row of the radiation units is arranged on the third sub-board;
the number of the radiation units in each row of the radiation units is the same; the distance between two adjacent radiation units in each row of radiation units is the same;
the distances between the adjacent two rows of radiation units are the same;
the centers of the first radiation units in each row of radiation units are positioned on the same straight line, and the straight line is perpendicular to the outer edge of the first sub-board.
2. The FAD antenna array of claim 1, further comprising partition walls;
the separation wall is perpendicular to the second sub-board and is positioned between two rows of the radiation units on the second sub-board;
the distance between the separation wall and the two rows of radiation units on the second sub-board is equal;
the head end of the separation wall exceeds the first radiation unit in any row of the radiation units on the second sub-board, and the tail end of the separation wall exceeds the last radiation unit in any row of the radiation units on the second sub-board.
3. The FAD antenna array of claim 2, wherein the partition wall comprises a vertically secured body and a fixed section;
the body is perpendicular to the second sub-board;
the fixed section is used for fixing the separation wall on the second sub-board.
4. The FAD antenna array of claim 3, wherein the fixing segments comprise convex hull structures by which the partition walls are fixed to the second sub-board in a point contact.
5. The FAD antenna array of claim 1, wherein a height difference between the second sub-board and the first sub-board is less than or equal to 0.2 λ; λ is an operating wavelength corresponding to a central operating frequency of the radiation unit.
6. The FAD antenna array of claim 1, wherein a spacing between two adjacent rows of the radiating elements is less than or equal to 0.75 λ; λ is an operating wavelength corresponding to a central operating frequency of the radiation unit.
7. The FAD antenna array as recited in claim 1, wherein a spacing between two adjacent radiating elements in any row of the radiating elements is 105 mm-115 mm.
8. The FAD antenna array of claim 2, wherein the height of the partition wall is 15mm to 25 mm.
9. The FAD antenna array of any one of claims 1 to 8, wherein the radiating element comprises a coupled feed core and a radiating arm;
the polarization direction of the coupling type feed core and the radiation arm form an included angle of 45 degrees.
10. The FAD antenna array of claim 9, wherein any of the radiating elements is insulated from the reflector plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010256521.9A CN111564696B (en) | 2020-04-02 | 2020-04-02 | FAD antenna array |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010256521.9A CN111564696B (en) | 2020-04-02 | 2020-04-02 | FAD antenna array |
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| CN111564696A true CN111564696A (en) | 2020-08-21 |
| CN111564696B CN111564696B (en) | 2022-07-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972660A (en) * | 2014-05-06 | 2014-08-06 | 京信通信技术(广州)有限公司 | Multi-frequency-shared base station antenna and antenna baffle board thereof |
| CN206364193U (en) * | 2017-01-06 | 2017-07-28 | 京信通信系统（中国）有限公司 | A kind of antenna and its reflecting plate |
| CN108539383A (en) * | 2018-05-24 | 2018-09-14 | 南京澳博阳射频技术有限公司 | Multifrequency antenna for base station and antenna-feeder system |
| CN110380235A (en) * | 2019-07-01 | 2019-10-25 | 广东通宇通讯股份有限公司 | A kind of multi-frequency array antenna |
-
2020
- 2020-04-02 CN CN202010256521.9A patent/CN111564696B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972660A (en) * | 2014-05-06 | 2014-08-06 | 京信通信技术(广州)有限公司 | Multi-frequency-shared base station antenna and antenna baffle board thereof |
| CN206364193U (en) * | 2017-01-06 | 2017-07-28 | 京信通信系统（中国）有限公司 | A kind of antenna and its reflecting plate |
| CN108539383A (en) * | 2018-05-24 | 2018-09-14 | 南京澳博阳射频技术有限公司 | Multifrequency antenna for base station and antenna-feeder system |
| CN110380235A (en) * | 2019-07-01 | 2019-10-25 | 广东通宇通讯股份有限公司 | A kind of multi-frequency array antenna |
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| CN111564696B (en) | 2022-07-19 |
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