CN110752431B - Impedance-adjustable low-frequency radiating unit and multi-system combined antenna - Google Patents

Impedance-adjustable low-frequency radiating unit and multi-system combined antenna Download PDF

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Publication number
CN110752431B
CN110752431B CN201810811420.6A CN201810811420A CN110752431B CN 110752431 B CN110752431 B CN 110752431B CN 201810811420 A CN201810811420 A CN 201810811420A CN 110752431 B CN110752431 B CN 110752431B
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low
coupling
feed
segment
clamping
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CN110752431A (en
Inventor
姜维维
卢吉水
黄立文
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Comba Telecom Technology Guangzhou Ltd
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Comba Telecom Technology Guangzhou Ltd
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10Combinations 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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/24Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/30Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/16Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Abstract

The invention discloses a low-frequency radiation unit with adjustable impedance and a multi-system combined antenna, wherein the low-frequency radiation unit comprises: each dipole comprises a first radiation arm and a second radiation arm, a first through hole is formed in the fixed end of the first radiation arm, and a coupling cavity is formed in the fixed end of the second radiation arm; a balun assembly for supporting the dipole; the feed assembly comprises a feed piece and a connecting piece, one end of the feed piece is fixedly arranged on the connecting piece and is arranged in the coupling cavity through the connecting piece, the other end of the feed piece is arranged above the first through hole in a suspended mode, and the length of the feed piece extending into the coupling cavity is adjustable; 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 is conducted with the other end of the feed sheet. The low frequency radiating element can reduce the influence on a smart antenna system nested in the low frequency radiating element. The multi-system common antenna adopts the low-frequency radiation unit, and has better radiation and circuit performance.

Description

Impedance-adjustable low-frequency radiating unit and multi-system combined antenna
Technical Field
The invention relates to the technical field of mobile communication, in particular to an impedance-adjustable low-frequency radiating unit and a multi-system co-body antenna.
Background
With the increase of mobile communication network systems, in order to optimize resource allocation, save site and antenna feed resources, reduce the difficulty of property coordination, and reduce investment cost, a multi-system co-located antenna sharing a common site gradually becomes the first choice for operators to establish networks.
At present, a multisystem common antenna selected by an operator effectively integrates an intelligent antenna system (1880-1920 MHz, 2010-2025 MHz, 2575-2635 MHz) and a base station antenna system (880-960 MHz, 1710-1880 MHz) in a pair of antenna covers. According to the implementation integration scheme, a base station low-frequency (880-960 MHz) radiation unit is nested in an intelligent antenna array, but the mutual coupling between the low-frequency radiation unit and the intelligent antenna array is serious in a base station antenna system nested in the intelligent antenna array, so that the indexes of the intelligent antenna array can be seriously influenced.
On the other hand, in the existing product, due to the difference in shape, size and material of the back plate, the side plate and the like, the impedance characteristics of the radiating unit in different boundary conditions are different, so that each antenna product needs to optimize and adjust the impedance characteristics of the radiating unit, the existing impedance adjusting mode is few, and adjustment is generally performed through re-molding, which greatly reduces the research and development production efficiency of the antenna product.
Disclosure of Invention
Therefore, it is necessary to provide a low-frequency radiating element with adjustable impedance and a multi-system antenna; the impedance of the low-frequency radiation unit can be adjusted, so that different requirements can be met; the multi-system common antenna adopts the low-frequency radiation unit, has the characteristics of small volume and small mutual coupling among systems, and has better radiation and circuit performance.
The technical scheme is as follows:
on one hand, the low-frequency radiation unit with adjustable impedance is in a cross-shaped structure and comprises a pair of dipoles orthogonal to each other in polarization, each dipole comprises a first radiation arm and a second radiation arm, a first through hole is formed in the fixed end of each first radiation arm, a coupling feed column is arranged at the fixed end of each second radiation arm, and a coupling cavity is formed in each 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, fixed ends of the first baluns and the first radiation arms are fixedly connected, and fixed ends of the second baluns and the second radiation arms are fixedly connected; the feed assemblies correspond to the dipoles one by one and comprise feed pieces and connecting pieces, one ends of the feed pieces are fixedly arranged on the connecting pieces, the connecting pieces are connected with the coupling feed columns, the other ends of the feed pieces are arranged above the first through holes in a suspended mode, and the length of the feed pieces extending into the coupling cavities is adjustable; 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.
The impedance-adjustable low-frequency radiation unit is characterized in that 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 feed column through a connecting piece, the other end of the feed sheet is arranged on the first radiation arm in a suspended mode and is conducted with an inner conductor of the cable, and an outer conductor of the cable is conducted with the first balun, so that a semi-coupling feed structure is formed; meanwhile, the length of the feed sheet extending into the coupling cavity is adjustable, so that the coupling efficiency can be changed during coupling feed, the standing wave coefficient and the impedance of the low-frequency radiation unit can be changed, and the impedance of the low-frequency radiation unit can be adjusted.
The technical solution is further explained below:
in one embodiment, the connecting member is fixedly arranged on the coupling feed column, the feed sheet comprises a first segment and a second segment, one end of the first segment is conducted with the inner conductor, the other end of the first segment is fixed with one end of the second segment, the second segment is arranged in the coupling cavity through the connecting member, and the length of the second segment extending into the coupling cavity is adjustable; the first section body of one feed sheet is provided with an avoiding part for avoiding the first section body of the other feed sheet, so that the two feed sheets can not interfere with each other in the orthogonal process. In the actual manufacturing process, the reactance characteristics can be influenced by the determined size of the coupling cavity and the width of the second section body, so that the impedance change of the second section body and the length of the second section body extending into the coupling cavity form a linear relation, and the impedance adjustment of the low-frequency radiation unit is convenient to carry out in the actual process.
In one embodiment, the connecting element is provided with a first clamping part for clamping the second segment body, and the clamping position between the first clamping part and the second segment body is adjustable, so that the position of the second segment body on the connecting element is adjustable. And the first clamping part is further utilized to realize the position adjustment of the second segment body on the connecting piece, so that after the connecting piece is fixed with the coupling feed column, the length of the second segment body extending into the coupling cavity can be adjusted by adjusting the position relation between the second segment body and the connecting piece.
In one embodiment, the second segment comprises a first body and a second body, one end of the first body is fixed with the other end of the first segment, and the second body can move along the length direction of the first body for adjusting the length of the second segment extending into the coupling cavity. Therefore, the length of the second section body extending into the coupling cavity is adjustable by utilizing the matching of the second body and the first body.
In one embodiment, the connecting member is provided with a second clamping portion for clamping the first body and the second body and making the first body and the second body fit with each other. Furthermore, the length of the second section body extending into the coupling cavity can be adjusted by adjusting the position relationship between the first body and the second body, fixing the second clamping part on the connecting piece and fixing the second clamping part in the coupling cavity through the connecting piece.
In one embodiment, the second clamping portion includes two clamping bodies arranged at an interval to form a through groove, the free ends of the two clamping bodies are both provided with pressing bodies, and the two pressing bodies are arranged at an interval in the through groove and can press the first body or the second body, so that the first body and the second body are attached to each other. Thus, the first body and the second body are ensured to be jointed and conducted to form an effective coupling feed section.
In one embodiment, the first body is fixedly arranged on the connecting piece, the second body is connected with the first body in a sliding manner, and a first locking structure is arranged between the first body and the second body; when the first locking structure is released, the second body can move along the length direction of the first body; when the first locking structure is locked, the second body is fixed with the first body. And the first locking structure is utilized to realize the position relation adjustment between the first body and the second body, so that the purpose of adjusting the length of the second section body extending into the coupling cavity is achieved.
In one embodiment, the coupling cavity is in a through hole shape, one end of the connecting piece is provided with a limiting body, the other end of the connecting piece can be inserted into the coupling cavity, and the other end of the connecting piece is provided with a clamping part; when the connecting piece is inserted into the preset position in the coupling cavity, the limiting body is in limiting fit with one end of the coupling feed column, the clamping part is in limiting fit with the other end of the coupling feed column, and the connecting piece is fixedly arranged on the coupling feed column. Therefore, the connecting piece is inserted into the coupling cavity, the limiting body is matched with the clamping part to form a limiting structure, and the connecting piece is fixedly arranged on the coupling feed column.
In one embodiment, the connecting piece is connected with the coupling feed column in a sliding mode, and a second locking structure is arranged between the connecting piece and the coupling feed column; when the second locking structure is released, the connecting piece can move along the depth direction of the coupling cavity; when the second locking structure is locked, the connecting piece is fixed with the coupling feed column. Therefore, the position relation between the connecting piece and the coupling feed column can be adjusted by utilizing the second locking structure, and the purpose of adjusting the length of the second section body extending into the coupling cavity is further achieved.
On the other hand, the application also provides a multi-system combined antenna which is characterized by comprising a reflecting plate, and an intelligent antenna system, a low-frequency base station system and a high-frequency base station system which are arranged on the reflecting plate, wherein the intelligent antenna system is arranged close to one end of the reflecting plate, and the high-frequency base station system is arranged close to the other end of the reflecting plate; the low-frequency base station system comprises a first low-frequency radiating unit and the low-frequency radiating unit, the low-frequency radiating unit is nested in the intelligent antenna system, and the first low-frequency radiating unit is nested in the high-frequency base station system; wherein the radiation structure of the first low-frequency radiation unit is one of a rectangular shape, a cross shape or a polygonal shape.
The multi-system combined antenna adopts the low-frequency radiation unit, has the characteristics of small volume and small mutual coupling among systems, and has better radiation and circuit performance; meanwhile, the system signal of the high-frequency base station and the system signal of the low-frequency base station can be radiated, the signal of the intelligent antenna system can be radiated well, and the user requirements are met.
Drawings
Fig. 1 is a schematic structural diagram of a low-frequency radiating element in an embodiment;
fig. 2 is an exploded view of the structure of the low frequency radiating element shown in fig. 1;
fig. 3 is a schematic top view of the low frequency radiating element shown in fig. 1;
FIG. 4 is a schematic diagram of an embodiment of the feeding assembly of FIG. 2;
fig. 5 is a schematic structural view of another embodiment of the feeding assembly of fig. 2;
fig. 6 is a schematic structural diagram of another state of the feeding assembly in fig. 5;
FIG. 7 is a diagram of a multi-system co-body antenna in one embodiment;
FIG. 8 is a graph of standing wave simulation results for a low frequency radiating element of a direct weld fed low frequency radiating element;
fig. 9 is a graph showing a result of a standing wave simulation of the low frequency radiating unit shown in fig. 1.
Description of reference numerals:
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, back-off portion, 302, welding hole, 314, second segment, 303, first body, 304, second body, 320, connecting piece, 321, limiting body, 322, clamping portion, 305, clamping hook, 323, first clamping portion, 324, second clamping portion, 306, through groove, 307, clamping body, 308, pressing body, 400, cable, 410, outer conductor, 420, inner conductor, 10, reflecting plate, 20, smart antenna system, 30, low frequency base station system, 32, first low frequency radiating element, 34, low frequency radiating element, 40, high frequency base station system.
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 to fig. 3, in this embodiment, the impedance-adjustable low-frequency radiating unit 34 includes a pair of orthogonally polarized dipoles 100, each dipole 100 includes a first radiating arm 110 and a second radiating arm 120, a fixed end of the first radiating arm 110 is provided with a first through hole 112, a fixed end of the second radiating arm 120 is provided with a coupling feed column 122, and a coupling cavity 102 is provided in the coupling feed column 122; 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 piece 310 and a connecting piece 320, one end of each feeding piece 310 is fixedly arranged on the connecting piece 320, and the connecting piece 320 is connected with the coupling feeding post 122, so that the other end of each feeding piece 310 is arranged above the first through hole 112 in a suspended manner, and the length of the feeding piece 310 extending into the coupling cavity 102 is adjustable; 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.
In the impedance-adjustable low-frequency radiating unit 34, a pair of orthogonally polarized dipoles 100 is fixedly arranged on the reflecting plate 10 through the balun assembly 200, and the feeding pieces 310 are respectively arranged on the dipoles 100; one end of the feeding plate 310 is disposed in the coupling feeding post 122 through the connecting member 320, the other end of the feeding plate 310 is disposed on the first radiating arm 110 in the air and conducted with the inner conductor 420 of the cable 400, and the outer conductor 410 of the cable 400 is conducted with the first balun 210, so as to form a half-coupling feeding structure; meanwhile, the length of the feed plate 310 extending into the coupling cavity 102 is adjustable, so that the coupling efficiency can be changed during coupling and feeding, and thus the standing wave coefficient and the impedance of the low-frequency radiating unit 34 can be changed, and the adjustment of the impedance of the low-frequency radiating unit 34 is completed.
Specifically, as shown in fig. 3, the low-frequency radiating unit has a cross-shaped structure.
As shown in fig. 4 or fig. 5, based on the above embodiments, the connecting member 320 is fixedly disposed on the coupling feeding post 122, the feeding plate 310 includes a first segment 312 and a second segment 314, one end of the first segment 312 is electrically connected to the inner conductor 420, the other end of the first segment 312 is fixed to one end of the second segment 314, the second segment 314 is disposed in the coupling cavity 102 through the connecting member 320, and the length of the second segment 314 extending into the coupling cavity 102 is adjustable. Furthermore, the second segment 314 and the coupling cavity 102 of the coupling feed column 122 can be utilized to form a half-coupling feed structure, which is simple, small in size and convenient to process compared with the existing full-coupling feed structure; as shown in fig. 8 and 9, the coupling structure can increase the inductive reactance of the circuit compared to the conventional direct solder feeding. In an actual manufacturing process, the impedance of the low-frequency radiating unit 34 can be adjusted conveniently in an actual process by determining the size of the coupling cavity 102 and the width of the second segment 314 to influence the reactance characteristics so that the impedance change of the reactance characteristics is in a linear relationship with the length of the second segment 314 extending into the coupling cavity 102.
Specifically, the coupling cavity 102 is a cylindrical hole, and the second segment 314 is plate-shaped. After the feeding sheet 310 is installed, the first segment 312 is disposed horizontally and the second segment 314 is disposed vertically.
Further, as shown in fig. 4, the connecting member 320 is provided with a first clamping part 323 for clamping the second segment 314, and the clamping position between the first clamping part 323 and the second segment 314 is adjustable, so that the position of the second segment 314 on the connecting member 320 is adjustable. The first clamping part 323 is further used to realize the position adjustment of the second segment 314 on the connecting member 320, so that after the connecting member 320 is fixed with the coupling feed column 122, the length of the second segment 314 extending into the coupling cavity 102 can be adjusted by adjusting the position relationship between the second segment 314 and the connecting member 320. The number of the first clamping portions 323 is at least two, and the first clamping portions are spaced apart along the length direction of the connecting member 320, so that a plurality of clamping points of the second segment 314 can be formed to meet the requirement of adjusting the length of the second segment 314.
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. 5 and fig. 6, the second segment 314 includes a first body 303 and a second body 304, one end of the first body 303 is fixed to the other end of the first segment 312, and the second body 304 can move along the length direction of the first body 303 to adjust the length of the second segment 314 extending into the coupling cavity 102. The length of the second section 314 extending into the coupling cavity 102 is adjustable by the cooperation of the second body 304 and the first body 303, so as to meet different requirements of adjustment operations.
As shown in fig. 5 and fig. 6, in the above embodiment, the connecting member 320 is provided with a second clamping portion 324, and the second clamping portion 324 is used for clamping the first body 303 and the second body 304, so that the first body 303 and the second body 304 are attached to each other. Furthermore, the length of the second section 314 extending into the coupling cavity 102 can be adjusted by adjusting the position relationship between the first body 303 and the second body 304, fixing the first body 303 and the second body 304 on the connecting member 320 by the second clamping portion 324, and fixing the first body 303 and the second body 304 in the coupling cavity 102 by the connecting member 320.
Of course, in practical operation, the first body 303 and the second body 304 may be fixed on the connecting member 320 by the second clamping portion 324, and then the position relationship between the first body 303 and the second body 304 may be adjusted.
Specifically, the number of the second clamping portions 324 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 length adjustment requirement.
In other embodiments, the second clamping portion 324 can be realized by a clamping groove formed by a spring plate, and other existing structures with clamping elements can also be used.
As shown in fig. 5 and fig. 6, in the present embodiment, the second clamping portion 324 includes two clamping bodies 307 arranged at an interval to form the through groove 306, the free ends of the two clamping bodies 307 are both provided with the pressing bodies 308, and the two pressing bodies 308 are arranged at an interval in the through groove 306 and can press the first body 303 or the second body 304, so that the first body 303 and the second body 304 are attached to each other. Thus, the first body 303 and the second body 304 are ensured to be attached and conducted to form an effective coupling feeding section. The pressing body 308 is provided with a guiding portion (not labeled) for facilitating the insertion of the first body 303 or the second body 304.
In another embodiment, the first body 303 is fixed on the connecting member 320, the second body 304 is slidably connected to the first body 303, and a first locking structure (not shown) is disposed between the first body 303 and the second body 304; when the first locking structure is released, the second body 304 is able to move along the length of the first body 303; when the first locking structure is locked, the second body 304 is fixed with the first body 303. The first locking structure is further utilized to adjust the position relationship between the first body 303 and the second body 304, so as to adjust the length of the second section 314 extending into the coupling cavity 102.
The cable 400 may be a communication cable 400, in particular, a feeder cable 400.
On the basis of any of the above embodiments, the connecting member 320 is fixed to the coupling feeding column 122 in a snap-fit manner. And then utilize the fixed principle of buckle, realize the quick installation and the dismantlement of connecting piece 320 and coupling feed column 122.
As shown in fig. 5, specifically in the present embodiment, the feeding coupling cavity 102 is in a through hole shape, one end of the connecting element 320 is provided with a limiting body 321, the other end of the connecting element 320 can be inserted into the coupling cavity 102, and the other end of the connecting element 320 is provided with an elastically arranged clamping portion 322; when the connector 320 is inserted into the predetermined position of the coupling cavity 102, the stopper 321 is in limit fit with one end of the coupling feeding post 122, and the clip 322 is in limit fit with the other end of the coupling feeding post 122, so as to fix the connector 320 on the coupling feeding post 122. Therefore, the connecting member 320 can be inserted into the coupling cavity 102, and the limiting body 321 and the clamping portion 322 cooperate to form a limiting structure, so as to fix the connecting member 320 on the coupling feeding column 122.
In the actual installation process, the clamping portion 322 of the connecting member 320 is inserted into the coupling cavity 102, and when the clamping portion 322 reaches the preset position and is in snap fit with the other end of the coupling feeding post 122, the limiting body 321 is also abutted against one end of the coupling feeding post 122, so as to complete the installation of the connecting member 320. When the connecting member 320 needs to be disassembled, the connecting member 320 can be taken out of the coupling cavity 102 only by separating the clamping part 322 from the clamping fit state, so that the connecting member 320 is more convenient to assemble and disassemble, and the assembling efficiency is greatly improved.
Furthermore, the fastening portion 322 includes at least two hooks 305 disposed at an end of the connecting member 320 at intervals, and the hooks 305 are disposed elastically. Thus, when the connector 320 extends into the coupling cavity 102, the hook 305 can be compressed to make the clip portion 322 shrink, so as to facilitate entering into the coupling cavity 102; when the position reaches the preset position, the hook 305 elastically resets and is clamped on the coupling feed column 122, so that the installation is convenient. Meanwhile, the arrangement of at least two hooks 305 can ensure that the stress of the connecting piece 320 is uniform and the installation is reliable. Specifically, the hook 305 has a tapered shape to be easily guided into the coupling cavity 102, and can be engaged with the end of the coupling feeding post 122 after reaching a predetermined position.
Of course, the fastening of the connecting member 320 and the coupling feeding post 122 may also be performed by means of bolting, riveting, or locking.
In another embodiment, the connecting member 320 is slidably connected to the coupling feeding post 122, and a second locking structure (not shown) is disposed between the connecting member 320 and the coupling feeding post 122; when the second locking structure is released, the connecting member 320 can move in the depth direction of the coupling cavity 102; when the second locking structure is locked, the connector 320 is fixed with the coupling feed post 122. Therefore, the second locking structure can be used to adjust the position relationship between the connecting member 320 and the coupling feed column 122, so as to adjust the length of the second segment 314 extending into the coupling cavity 102.
The first locking structure and the second locking structure can be realized by the prior art for realizing the locking and the releasing between one element and the other element, and the details are not described herein.
The first segment 312 of one feed tab 310 is provided with a relief 301 that avoids the first segment 312 of another feed tab 310, such that the two feed tabs 310 do not interfere with each other when orthogonal.
On the basis of any of the above embodiments, the other ends of the two first baluns 210 and the other ends of the two second baluns 220 are connected into a whole through the base 230. Therefore, the balun assembly 200 is compact in structure and small in size, and the influence on the peripheral intelligent radiation units can be reduced; meanwhile, the module assembly can be performed, other parts of the low frequency radiating unit 34 are integrated on the base 230, and then the low frequency radiating unit can be directly mounted on the reflection plate 10 through the base 230.
It should be noted that, when one element is "slidably connected" to another element, various prior art implementations may be adopted, and are not described herein.
As shown in fig. 7, in another embodiment, the multi-system antenna includes a reflection plate 10, and a smart antenna system 20, a low frequency base station system 30 and a high frequency base station system 40 mounted on the reflection plate 10, wherein the smart antenna system 20 is disposed near one end of the reflection plate 10, and the high frequency base station system 40 is disposed near the other end of the reflection plate 10; the low frequency base station system 30 comprises a first low frequency radiating element 32 and the low frequency radiating element 34, the low frequency radiating element 34 is nested in the smart antenna system 20, and the first low frequency radiating element 32 is nested in the high frequency base station system 40; wherein the radiation structure of the first low frequency radiation unit 32 is one of a rectangular shape, a cross shape or a polygonal shape.
The multi-system combined antenna adopts the low-frequency radiation unit 34, has the characteristics of small volume and small mutual coupling among systems, and has better radiation and circuit performance, and in addition, the impedance of the low-frequency radiation unit and the low-frequency radiation unit 34 is adjusted, so that different requirements of customers can be met; meanwhile, the system can radiate signals of the high-frequency base station system 40 and signals of the low-frequency base station system 30, can also well radiate signals of the intelligent antenna system 20, and meets the requirements of users.
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.

Claims (10)

1. The utility model provides an impedance adjustable low frequency radiating element, its characterized in that, low frequency radiating element is "ten" font structure, includes:
each dipole comprises a first radiation arm and a second radiation arm, a first through hole is formed in the fixed end of the first radiation arm, a coupling feed column is arranged at the fixed end of the second radiation 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, fixed ends of the first baluns and the first radiation arms are fixedly connected, and fixed ends of the second baluns and the second radiation arms are fixedly connected;
the feed assemblies correspond to the dipoles one by one and comprise feed pieces and connecting pieces, one ends of the feed pieces are fixedly arranged on the connecting pieces, the connecting pieces are connected with the coupling feed columns, the other ends of the feed pieces are arranged above the first through holes in a suspended mode, and the length of the feed pieces extending into the coupling cavities is adjustable; 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.
2. The low-frequency radiating unit according to claim 1, wherein the connecting member is fixedly disposed on the coupling feed post, the feed piece includes a first segment and a second segment, one end of the first segment is conducted with the inner conductor, the other end of the first segment is fixed to one end of the second segment, the second segment is disposed in the coupling cavity through the connecting member, and a length of the second segment extending into the coupling cavity is adjustable; the first section body of one feed sheet is provided with an avoiding part for avoiding the first section body of the other feed sheet, so that the two feed sheets can not interfere with each other in the orthogonal process.
3. The low frequency radiating element of claim 2, wherein the connecting member is provided with a first clamping portion for clamping the second segment body, and a clamping position between the first clamping portion and the second segment body is adjustable, so that a position of the second segment body on the connecting member is adjustable.
4. The low frequency radiating element of claim 2, wherein the second segment comprises a first body and a second body, one end of the first body is fixed to the other end of the first segment, and the second body is capable of moving along the length direction of the first body for adjusting the length of the second segment extending into the coupling cavity.
5. The low frequency radiating element of claim 4, wherein the connecting member is provided with a second clamping portion for clamping the first body and the second body and making the first body and the second body fit together.
6. The low-frequency radiating unit according to claim 5, wherein the second clamping portion includes two clamping bodies spaced apart from each other to form a through-slot, and each of the free ends of the two clamping bodies has a pressing body, and the two pressing bodies are spaced apart from each other in the through-slot and can press the first body or the second body, so that the first body and the second body are attached to each other.
7. The low-frequency radiating unit according to claim 4, wherein the first body is fixedly arranged on the connecting member, the second body is slidably connected with the first body, and a first locking structure is arranged between the first body and the second body; when the first locking structure is released, the second body can move along the length direction of the first body; when the first locking structure is locked, the second body is fixed with the first body.
8. The low-frequency radiation unit according to any one of claims 1 to 7, wherein the coupling cavity is in a through hole shape, one end of the connecting piece is provided with a limiting body, the other end of the connecting piece can be inserted into the coupling cavity, and the other end of the connecting piece is provided with a clamping part; when the connecting piece is inserted into the preset position in the coupling cavity, the limiting body is in limiting fit with one end of the coupling feed column, the clamping part is in limiting fit with the other end of the coupling feed column, and the connecting piece is fixedly arranged on the coupling feed column.
9. The low-frequency radiating unit according to any one of claims 1 to 7, wherein the connecting member is slidably connected to the coupling feeding post, and a second locking structure is provided between the connecting member and the coupling feeding post; when the second locking structure is released, the connecting piece can move along the depth direction of the coupling cavity; when the second locking structure is locked, the connecting piece is fixed with the coupling feed column.
10. A multi-system combined antenna is characterized by comprising a reflecting plate, an intelligent antenna system, a low-frequency base station system and a high-frequency base station system, wherein the intelligent antenna system, the low-frequency base station system and the high-frequency base station system are arranged on the reflecting plate, the intelligent antenna system is arranged close to one end of the reflecting plate, and the high-frequency base station system is arranged close to the other end of the reflecting plate; the low-frequency base station system comprises a first low-frequency radiating unit and the low-frequency radiating unit according to any one of claims 1 to 9, wherein the low-frequency radiating unit is nested in the smart antenna system, and the first low-frequency radiating unit is nested in the high-frequency base station system; wherein the radiation structure of the first low-frequency radiation unit is one of a rectangular shape, a cross shape or a polygonal shape.
CN201810811420.6A 2018-07-23 2018-07-23 Impedance-adjustable low-frequency radiating unit and multi-system combined antenna Active CN110752431B (en)

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CN111446541A (en) * 2020-04-10 2020-07-24 航天恒星科技有限公司 Cross-shaped array circularly polarized antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10126150A (en) * 1996-10-17 1998-05-15 Nec Eng Ltd Cross dipole antenna
CN204991949U (en) * 2015-09-21 2016-01-20 深圳市嘉世通科技有限公司 Super wide band oscillator
CN107230827A (en) * 2017-05-31 2017-10-03 深圳三星通信技术研究有限公司 A kind of half-wave dipole, radiating element and antenna
CN108172981A (en) * 2017-12-30 2018-06-15 京信通信系统(中国)有限公司 Antenna and its radiating element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10126150A (en) * 1996-10-17 1998-05-15 Nec Eng Ltd Cross dipole antenna
CN204991949U (en) * 2015-09-21 2016-01-20 深圳市嘉世通科技有限公司 Super wide band oscillator
CN107230827A (en) * 2017-05-31 2017-10-03 深圳三星通信技术研究有限公司 A kind of half-wave dipole, radiating element and antenna
CN108172981A (en) * 2017-12-30 2018-06-15 京信通信系统(中国)有限公司 Antenna and its radiating element

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