Low mutual coupling multi-system common antenna
阅读说明:本技术 低互耦的多系统共体天线 (Low mutual coupling multi-system common antenna ) 是由 姜维维 黄立文 刘培涛 孙善球 于 2018-07-23 设计创作,主要内容包括:本发明公开了一种低互耦的多系统共体天线,包括反射板,反射板包括两个相对设置的第一端及第二端;智能天线阵列,智能天线阵列包括多列智能天线子阵列;智能天线子阵列均包括多个智能天线阵元;及基站天线阵列,基站天线阵列包括至少两列第一基站天线子阵列及至少两列第二基站天线子阵列;第一基站天线子阵列包括至少一个第一基站天线阵元,第一基站天线阵元的辐射结构呈“十”字型状,每个第一基站天线阵元均嵌入相邻两个智能天线子阵列之间的间隙内,且第一基站天线阵元的辐射结构被至少四个智能天线阵元包围;第二基站天线子阵列包括至少两个第二基站天线阵元。该多系统共体天线,能降低基站天线系统与智能天线系统间的相互耦合。(The invention discloses a low-mutual-coupling multi-system combined antenna which comprises a reflecting plate, wherein the reflecting plate comprises a first end and a second end which are oppositely arranged; the intelligent antenna array comprises a plurality of rows of intelligent antenna sub-arrays; the intelligent antenna sub-arrays comprise a plurality of intelligent antenna array elements; the base station antenna array comprises at least two rows of first base station antenna sub-arrays and at least two rows of second base station antenna sub-arrays; the first base station antenna subarray comprises at least one first base station antenna array element, the radiation structure of the first base station antenna array element is in a cross shape, each first base station antenna array element is embedded into a gap between two adjacent intelligent antenna subarrays, and the radiation structure of the first base station antenna array element is surrounded by at least four intelligent antenna array elements; the second base station antenna sub-array comprises at least two second base station antenna elements. The multi-system combined antenna can reduce mutual coupling between a base station antenna system and an intelligent antenna system.)
1. A low mutual coupling multi-system collective antenna, comprising:
the reflecting plate comprises a first end and a second end which are oppositely arranged;
the intelligent antenna array is electrically connected with the reflector plate and is arranged close to the first end, and the intelligent antenna array comprises a plurality of rows of intelligent antenna sub-arrays which are arranged at intervals along the width direction of the first end; the intelligent antenna sub-arrays respectively comprise a plurality of intelligent antenna array elements which are arranged at equal intervals along the direction from the first end to the second end; and
the base station antenna array is electrically connected with the reflecting plate and comprises at least two rows of first base station antenna sub-arrays and at least two rows of second base station antenna sub-arrays which are arranged at intervals along the width direction of the first end; all the first base station antenna sub-arrays are arranged close to the first end, each first base station antenna sub-array comprises at least one first base station antenna element arranged along the direction from the first end to the second end, the radiation structure of each first base station antenna element is in a cross shape, each first base station antenna element is embedded into a gap between every two adjacent intelligent antenna sub-arrays, and the radiation structure of each first base station antenna element is surrounded by at least four intelligent antenna elements; all the second base station antenna sub-arrays are arranged close to the second end, and each second base station antenna sub-array comprises at least two second base station antenna array elements which are arranged at equal intervals along the direction from the second end to the first end.
2. The multi-system community antenna according to claim 1, wherein the plurality of smart antenna elements of two adjacent smart antenna sub-arrays are arranged in parallel or in a staggered manner.
3. The multi-system community antenna according to claim 2, wherein the center lines of all the smart antenna elements of the smart antenna sub-arrays in the same column are on the same straight line.
4. The multisystem community antenna as claimed in claim 1, wherein a plurality of smart antenna elements of two adjacent smart antenna sub-arrays are arranged in a staggered manner, and one first base station antenna element is surrounded by the radiating elements of four smart antenna elements.
5. The multi-system community antenna according to claim 1, wherein the smart antenna array and the base station antenna array are conductively or capacitively coupled to the reflector plate.
6. The multi-system community antenna according to claim 1, wherein the first base station antenna array element and the second base station antenna array element are both low-frequency base station antenna array elements, the smart antenna array element is a high-frequency radiating unit, the base station antenna array further comprises a plurality of high-frequency base station antenna arrays arranged near the second end, the high-frequency base station antenna arrays comprise a plurality of columns of high-frequency base station antenna sub-arrays arranged at intervals along the width direction of the second end, and the high-frequency base station antenna sub-arrays each comprise a plurality of high-frequency base station antenna sub-array elements arranged at equal intervals along the direction from the second end to the first end; and the first base station antenna array elements are all embedded into the high-frequency base station antenna array elements.
7. The multi-system community antenna according to claim 6, wherein the radiating structure of the second base station antenna element is in the shape of a circular ring, a rectangle or a polygon, and part of the radiating structures of the high frequency base station antenna elements are nested in the corresponding radiating structures of the second base station antenna elements.
8. The multi-system community antenna according to any of claims 1 to 7, wherein the first base station antenna element is a half-coupled low frequency radiating element and is mounted at the end of a smart antenna array.
9. The multi-system co-body antenna of claim 8, wherein the first base station antenna element comprises:
the dipole antenna comprises a pair of polarized orthogonal dipoles, a pair of polarized orthogonal dipoles and a pair of polarized orthogonal dipoles, wherein each dipole comprises a first radiating arm and a second radiating arm, a first through hole is formed in the fixed end of each first radiating arm, a coupling feed column is arranged at the fixed end of each second radiating arm, and a coupling cavity is formed in the coupling feed column;
the balun assembly comprises first baluns in one-to-one correspondence with the first radiation arms and second baluns in one-to-one correspondence with the second radiation arms, one end of each first balun is fixedly connected with a fixed end of each first radiation arm, the other end of each first balun can be fixedly arranged on the reflecting plate, one end of each second balun is fixedly connected with a fixed end of each second radiation arm, and the other end of each second balun can be fixedly arranged on the reflecting plate;
the feed assemblies correspond to the dipoles one by one, each feed assembly comprises a feed piece and a connecting piece, one end of each feed piece is fixedly arranged on the connecting piece and is arranged in the coupling feed column through the connecting piece, and the other end of each feed piece is arranged above the first through hole in a suspended mode; and
the cable comprises an outer conductor and an inner conductor which are insulated from each other, the outer conductor is conducted with the first balun, and the inner conductor penetrates through the first through hole and then is conducted with the other end of the feed sheet.
10. The multi-system co-body antenna according to claim 9, wherein the length of the feed tab extending into the coupling cavity is adjustable.
Technical Field
The invention relates to the technical field of mobile communication, in particular to a low-mutual-coupling multi-system co-body antenna.
Background
With the increase of mobile communication network systems, multiple communication systems coexist, and in order to optimize resource allocation, save station and antenna feed resources, reduce the difficulty of property coordination, and reduce investment cost, a common-station and common-address system common-body antenna gradually becomes the first choice for operators to establish networks.
Currently, a multisystem co-integrated antenna selected by an operator effectively integrates an intelligent antenna eight-channel FA \ D system (1880-1920 MHz, 2010-2025MHz, 2575-2635 MHz) and a multi-frequency shared base station antenna system (supporting a four-channel 900MHz system and a four-channel 1800MHz system simultaneously) in a pair of antenna covers. The traditional antenna integration mode is that, as a design scheme given in CN106207490A, a base station antenna array of a 900MHz system in the scheme is composed of a first base station antenna array element located at the upper end of a reflector and a second base station antenna array element located at the lower end of the reflector, the second base station antenna array element nests four adjacent smart antenna array elements therein, and the radiation structures of the first base station antenna array element and the second base station antenna array element are both circular rings, rectangles or polygons, which can realize high integration of smart antennas and base station antennas, and can realize a multisystem co-body antenna with higher gain under a smaller size.
However, in the process of implementing the above scheme, the inventor finds that at least the following problems exist in the prior art: the structural form of the second base station antenna array element not only can be strongly coupled with the intelligent antenna array element nested in the second base station antenna array element, but also can be strongly coupled with the intelligent antenna array element surrounding the second base station antenna array element; therefore, the mutual coupling between the base station antenna and the intelligent antenna system is serious, and the radiation performance indexes of the intelligent antenna such as the wave width, the front-to-back ratio, the side lobe and the like and the circuit performance indexes of the standing wave and the isolation degree can be seriously influenced.
Disclosure of Invention
Therefore, a need exists for a low mutual coupling multi-system combined antenna, which reduces mutual coupling between a base station antenna system and an intelligent antenna system and improves overall performance of the antenna under the condition that sizes of an antenna housing and a reflector are not changed.
The technical scheme is as follows:
on one hand, the application provides a low-mutual-coupling multi-system common antenna, which comprises a reflecting plate, wherein the reflecting plate comprises a first end and a second end which are oppositely arranged; the intelligent antenna array is electrically connected with the reflector plate and is arranged close to the first end, and the intelligent antenna array comprises a plurality of rows of intelligent antenna sub-arrays which are arranged at intervals along the width direction of the first end; the intelligent antenna sub-arrays respectively comprise a plurality of intelligent antenna array elements which are arranged at equal intervals along the direction from the first end to the second end; the base station antenna array is electrically connected with the reflecting plate and comprises at least two rows of first base station antenna sub-arrays and at least two rows of second base station antenna sub-arrays which are arranged at intervals along the width direction of the first end; all the first base station antenna sub-arrays are arranged close to the first end, each first base station antenna sub-array comprises at least one first base station antenna element arranged along the direction from the first end to the second end, the radiation structure of each first base station antenna element is in a cross shape, each first base station antenna element is embedded into a gap between every two adjacent intelligent antenna sub-arrays, and the radiation structure of each first base station antenna element is surrounded by at least four intelligent antenna elements; all the second base station antenna sub-arrays are arranged close to the second end, and each second base station antenna sub-array comprises at least two second base station antenna array elements which are arranged at equal intervals along the direction from the second end to the first end.
According to the low-mutual-coupling multi-system combined antenna, the intelligent antenna array and the base station antenna array working at different frequency bands are respectively arranged at two different ends of the reflector plate, so that gaps among antenna array elements are fully and reasonably utilized, and one or more base station antenna array elements are added under the condition that the sizes of the antenna housing and the reflector plate are not changed, so that the gain of the antenna is improved; meanwhile, the radiation structure of the first base station antenna array element is in a cross shape, each first base station antenna array element is embedded into a gap between every two adjacent intelligent antenna sub-arrays, and the radiation structure of the first base station antenna array element is surrounded by at least four intelligent antenna array elements; therefore, the first base station antenna array element can be flexibly nested in the intelligent antenna array, so that the first base station antenna array element is relatively strongly coupled with the intelligent antenna array elements around the first base station antenna array element, and is relatively low in coupling with the intelligent antenna array elements around the first base station antenna array element. Therefore, the multi-system combined antenna can reduce the mutual coupling between the base station antenna system and the intelligent antenna system and improve the overall performance of the antenna under the condition of keeping the sizes of the antenna housing and the reflecting plate unchanged.
The technical solution is further explained below:
in one embodiment, the plurality of smart antenna elements of two adjacent smart antenna sub-arrays are arranged in parallel or in a staggered manner. Therefore, the space in the reflecting plate can be fully utilized, and the first base station antenna array element is convenient to arrange.
In one embodiment, the center lines of all the smart antenna elements of the smart antenna sub-arrays in the same column are on the same straight line. So, the interval of two adjacent smart antenna subarrays of setting up that can be reasonable is convenient for locate first base station antenna array element in this clearance to make the radiation structure of first base station antenna array element surrounded by smart antenna array element's radiating element.
In one embodiment, a plurality of smart antenna elements of two adjacent smart antenna sub-arrays are arranged in a staggered manner, and the radiating element of one first base station antenna element is surrounded by the radiating elements of four smart antenna elements. Therefore, the first base station antenna array element has relatively strong coupling with four surrounding intelligent antenna array elements, and has lower coupling with six surrounding intelligent antenna array elements, thereby having optimal radiation performance.
In one embodiment, the smart antenna array and the base station antenna array are conductively or capacitively coupled to the reflector plate.
In one embodiment, the first base station antenna array element and the second base station antenna array element are both low-frequency base station antenna array elements, the base station antenna array further includes a plurality of high-frequency base station antenna arrays disposed near the second end, the high-frequency base station antenna arrays include a plurality of columns of high-frequency base station antenna sub-arrays disposed at intervals along the width direction of the second end, and the high-frequency base station antenna sub-arrays each include a plurality of high-frequency base station antenna sub-array elements arranged at equal intervals along the direction from the second end to the first end; and the first base station antenna array elements are all embedded into the high-frequency base station antenna array elements. Therefore, base station antennas with more frequency bands can be formed to form a dual-frequency shared antenna.
In one embodiment, the radiation structure of the second base station antenna array element is in a circular ring, rectangular or polygonal shape, and part of the radiation structures of the high-frequency base station antenna array elements are nested in the radiation structure of the corresponding second base station antenna array element.
In one embodiment, the first base station antenna element is a half-coupled low frequency radiating element and is mounted at the end of a smart antenna array. In this way, the impact on the smart antenna array nested within it is further reduced.
In one embodiment, the first base station antenna element is a low frequency radiating element, and includes: the dipole antenna comprises a pair of polarized orthogonal dipoles, a pair of polarized orthogonal dipoles and a pair of polarized orthogonal dipoles, wherein each dipole comprises a first radiating arm and a second radiating arm, a first through hole is formed in the fixed end of each first radiating arm, a coupling feed column is arranged at the fixed end of each second radiating arm, and a coupling cavity is formed in the coupling feed column; the balun assembly comprises two first baluns in one-to-one correspondence with the first radiation arms and two second baluns in one-to-one correspondence with the second radiation arms, one end of each first balun is fixedly connected with a fixed end of each first radiation arm, the other end of each first balun can be fixedly arranged on the reflecting plate, one end of each second balun is fixedly connected with a fixed end of each second radiation arm, and the other end of each second balun can be fixedly arranged on the reflecting plate; the two feed assemblies correspond to the dipoles one by one, each feed assembly comprises a feed piece and a connecting piece, one end of each feed piece is fixedly arranged on the connecting piece and is arranged in the coupling cavity through the connecting piece, and the other end of each feed piece is arranged above the first through hole in a suspended mode; and the cable comprises an outer conductor and an inner conductor which are insulated from each other, the outer conductor is conducted with the first balun, and the inner conductor penetrates through the first through hole and then is conducted with the other end of the feed sheet.
Thus, a pair of dipoles with orthogonal polarization are fixedly arranged on the reflecting plate through the balun component, and feed pieces are respectively arranged on the dipoles; one end of the feed sheet is arranged in the coupling cavity through a connecting piece, the other end of the feed sheet is arranged on the first radiating arm in a suspended mode and is communicated with an inner conductor of the cable, and an outer conductor of the cable is communicated with the first balun, so that a half-coupling feed structure is formed; compared with the existing fully-coupled feed low-frequency radiating unit, the low-frequency radiating unit has a simple structure and is convenient to process; compared with the existing low-frequency radiation unit with direct welding feed, the frequency band bandwidth is wider, and the standing wave is better. After the low-frequency radiating unit is applied to a multi-system common antenna, the mutual coupling among the systems is small, and the low-frequency radiating unit has better radiation and circuit performance.
The technical solution is further explained below:
in one embodiment, the length of the feed piece extending into the coupling cavity is adjustable. Therefore, the impedance of the first base station antenna array element can be adjusted, and different requirements can be met.
Drawings
Fig. 1 is a schematic layout diagram of a multi-system co-body antenna in an embodiment;
fig. 2 is a schematic layout diagram of a multisystem community antenna in another embodiment;
fig. 3 is a schematic structural diagram of a low-frequency radiating element in an embodiment;
fig. 4 is an exploded view of the structure of the low frequency radiating element shown in fig. 3;
fig. 5 is a schematic top view of the low frequency radiating element shown in fig. 3;
fig. 6 is a schematic structural diagram of the feeding assembly shown in fig. 4;
FIG. 7 is a schematic structural diagram of an embodiment of a feed assembly;
fig. 8 is a schematic structural view of another embodiment of a feeding assembly;
fig. 9 is a schematic structural diagram of another state of the feeding assembly.
Description of reference numerals:
10. reflecting plate, 20, smart antenna array, 21, smart antenna subarray, 21a, smart antenna array element, 30, base station antenna array, 31, first base station antenna subarray, 31a, first base station antenna array element, 32, second base station antenna subarray, 32a, second base station antenna array element, 33, high frequency base station antenna subarray, 33a, high frequency base station antenna array element, 100, dipole, 110, first radiating arm, 112, first through hole, 120, second radiating arm, 122, coupling feed column, 102, coupling cavity, 200, balun component, 210, first balun, 220, second balun, 230, base, 300, feed component, 310, feed tab, 312, first segment, 301, avoidance part, 302, recess, 303, welding hole, 314, second segment, 303, first body, 304, second body, 320, connecting piece, 321, limiting body, 322, The clamping device comprises a clamping part, 322a, a clamping hook, 323, a clamping part, 305, a first clamp body, 306, a second clamp body, 307, a first protrusion, 308, a second protrusion, 324, a connecting hole, 325, a pressure-bearing body, 309, an installation hole, 326, a first clamping part, 327, a second clamping part, 327a through groove, 327b, a third clamp body, 327c, a pressing body, 400, a cable, 410, an outer conductor, 420 and an inner conductor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
References to "first" and "second" in this disclosure do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1 and fig. 2, in the present embodiment, the low mutual coupling multi-system antenna includes:
the reflecting
the intelligent antenna array 20 is electrically connected with the
the base
According to the low-mutual-coupling multi-system combined antenna, the intelligent antenna array 20 and the base
It should be noted that the number of columns of the
In addition, the radiation structure of the "first base station
As shown in fig. 1 and 2, in the above embodiment, the plurality of
As shown in fig. 2, based on any of the above embodiments, the center lines of all
As shown in fig. 1 and 2, the
As shown in fig. 1 and fig. 2, the first base station
Specifically, the first base
Further, the centers of the first base
On the basis of any of the above embodiments, the smart antenna array 20 and the base
On the basis of any of the above embodiments, the first base
Specifically, as shown in fig. 3 to 5, the low frequency radiation unit includes: a pair of orthogonally polarized dipoles 100, each dipole 100 comprising a first radiation arm 110 and a second radiation arm 120, the fixed end of the first radiation arm 110 being provided with a first through hole 112, the fixed end of the second radiation arm 120 being provided with a coupling feed column 122, the coupling feed column 122 being provided with a coupling cavity 102; the balun assembly 200 includes two first baluns 210 corresponding to the first radiation arms 110 one to one, and two second baluns 220 corresponding to the second radiation arms 120 one to one, one end of the first balun 210 is fixedly connected to a fixed end of the first radiation arm 110, the other end of the first balun 210 can be fixedly disposed on the reflection plate 10, one end of the second balun 220 is fixedly connected to a fixed end of the second radiation arm 120, and the other end of the second balun 220 can be fixedly disposed on the reflection plate 10; two feeding assemblies 300 corresponding to the dipoles 100 one by one, wherein each feeding assembly 300 comprises a feeding sheet 310 and a connecting piece 320, one end of each feeding sheet 310 is fixedly arranged on the connecting piece 320 and is arranged in the coupling cavity 102 through the connecting piece 320, and the other end of each feeding sheet 310 is arranged above the first through hole 112 in a suspended manner; and a cable 400, wherein the cable 400 includes an outer conductor 410 and an inner conductor 420 insulated from each other, the outer conductor 410 is conducted with the first balun 210, and the inner conductor 420 is conducted with the other end of the feeding strip 310 after passing through the first through hole 112.
The low-frequency radiation unit is characterized in that a pair of
Specifically, the
The
On the basis of the above embodiment, the connecting
As shown in fig. 3 to fig. 6, in the present embodiment, the
In the actual installation process, the clamping portion 322 of the connecting
As shown in fig. 6, the fastening portion 322 further includes at least two hooks 322a spaced apart from each other at the end of the connecting
Of course, the fastening of the
As shown in fig. 6, based on the above embodiment, the
Specifically, the
As shown in fig. 6, the connecting
As shown in fig. 6, the clamping portion 323 further includes a first clamping body 305 and a second clamping body 306 disposed at an end of the connecting
In addition, the pressure-bearing body 325 is further provided with a mounting hole 309 which is in sleeve fit with the other end of the
In another embodiment, as shown in fig. 7-9, the length of the
Specifically, the
Further, as shown in fig. 7, the connecting
The first clamping portion can be realized by a clamping groove (not labeled) formed by a spring sheet (not labeled), and can also be realized by other existing structures with clamping elements.
Further or as another embodiment, as shown in fig. 8 and 9, the
As shown in fig. 8 and 9, in the above embodiment, the connecting
Of course, in practical operation, the first body 314a and the second body 314b may be fixed to the connecting
Specifically, the number of the second clamping portions 327 is at least two, and the second clamping portions are arranged at intervals along the length direction of the connecting portion, so that a plurality of clamping points can be formed to meet the requirement of length adjustment.
In other embodiments, the second clamping portion 327 can be realized by a clip groove formed by a spring plate, or can be realized by other existing structures with a clamping element.
As shown in fig. 8 and fig. 9, in this embodiment, the second clamping portion 327 includes two third clamping bodies 327b that are disposed at intervals to form a through groove 327a, the free ends of the two third clamping bodies 327b are both provided with pressing bodies 327c, and the two pressing bodies 327c are disposed at intervals in the through groove 327a and can press the first body 314a or the second body 314b, so that the first body 314a is attached to the second body 314 b. Thus, the first body 314a and the second body 314b are ensured to be attached and conducted to form an effective coupling feeding section. The pressing body 327c is provided with an insertion portion (not labeled) for facilitating the insertion of the first body 314a or the second body 314 b.
In another embodiment, the first body 314a is fixed on the connecting
In addition to any of the above embodiments, as shown in fig. 6 or fig. 8, the
As shown in fig. 3, on the basis of any of the above embodiments, the other ends of the two
The low-mutual-coupling multi-system common antenna has the following advantages:
(1) the first base
(2) the radiation structure form of the first base station
(3) the first base station
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
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