CN106356630A - Ultra-wideband radiation unit and antenna - Google Patents
Ultra-wideband radiation unit and antenna Download PDFInfo
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- CN106356630A CN106356630A CN201610928844.1A CN201610928844A CN106356630A CN 106356630 A CN106356630 A CN 106356630A CN 201610928844 A CN201610928844 A CN 201610928844A CN 106356630 A CN106356630 A CN 106356630A
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- wide
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- 230000005855 radiation Effects 0.000 title claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 30
- 229920003023 plastic Polymers 0.000 claims abstract description 14
- 239000004033 plastic Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 6
- 210000000056 organ Anatomy 0.000 claims description 32
- 230000003068 static effect Effects 0.000 claims description 32
- 230000002787 reinforcement Effects 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000010009 beating Methods 0.000 claims description 5
- 238000013138 pruning Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
-
- 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
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses an ultra-wideband radiation unit and an antenna. The ultra-wideband radiation unit comprises a pair of dipoles which are orthogonally arranged, a balancer which is used for performing balanced feed on the dipoles, a feed core and a feed circuit board, wherein each dipole comprises a pair of radiation unit arms which are fixed on the feed balancer, and two sides of the tail end of each radiation unit arm are bent downward; the whole radiation unit arms, the feed balancer and the feed core are together arranged on a supporting plastic part which is molded by once injection; and the tail end of the feed balancer and the tail end of the feed core are together soldered on the feed circuit board. According to the ultra-wideband radiation unit, the radiation unit arms and the feed balancer are formed by adopting a metal plate bending process, the caliber of the radiation units can be reduced and the impedance bandwidth of the radiation units is widened by adopting a mode that the tail ends of the radiation unit arms are bent downward, and the radiation units are fed by the metal plate feed core, so that the radiation units can be minimized and lightened.
Description
Technical field
The present invention relates to mobile communication technology field, it is specifically related to a kind of ultra-wide-band emission unit and antenna.
Background technology
Ultra-wideband antenna communication technology (uwb) typically refer to signal bandwidth be more than 1.5ghz or bandwidth ratio (signal width with
The ratio of mid frequency) more than 25% radiotechnics.Ultra-wideband antenna is the critical component in super broad band radio communication system,
The performance of antenna will directly affect the performance of whole system.
With the high speed development of mobile communication technology, multifrequency ultra-wideband antenna for base station has become becoming of future antenna development
Gesture, the radiating element quantity in antenna also will be multiplied, and therefore equipment vendor and operator are to the size of antenna and weight
Requirement increasingly stringent, the miniaturization of the part such as radiating element therefore in antenna, light-weighted become to become more and more important.
The ultra-wide-band emission unit of prior art is many to carry out integrated molding using extrusion process, and radiating element weight is relatively
Weight is it is impossible to meet existing Communications Market to light-weighted requirement.Therefore, need for existing and future communications market lightweight
Ask, it is simple to design a kind of structure, easy to process, and double frequency and double frequency use above have superperformance radiating element outstanding
For necessity.
Content of the invention
In order to solve above-mentioned technical problem, the present invention proposes a kind of ultra-wide-band emission unit and antenna, can guarantee that original pressure
In the case of casting radiating element performance, realize the miniaturization of antenna for base station, lightweight.
The technical scheme is that and be achieved in that:
A kind of ultra-wide-band emission unit, is balanced the feed balance feeding including a pair of dipole, to each dipole
Device, the feed core to each dipole feed and feed circuit plate, described static organ and described feed core are electrically connected to described feedback
Electric circuit board, each dipole, includes two radiating element arms being symmetrically fixedly installed on described feed static organ, four institutes
State radiating element arm to be symmetrically set with respect to radiating element center, each radiating element arm end both sides has downward bending
The bending unit arm being formed.
Further, whole radiating element is rendered as square structure or eight-sided formation on the projection surface or other are just many
Side shape structure.
Further, described feed static organ includes four balancing strut member of corresponding four radiating element arms, described spoke
Penetrate the paracentral one end of unit arm rest to be connected with the upper end of described balancing strut member, described radiating element arm and corresponding described radiation
The balancing strut member of unit arm, bending unit arm are integrally formed by panel beating bending technique.
Further, described feed static organ as feed core feed ground structure with described feed core formed microstrip-fed
Structure.
Further, described feed static organ and described feed core are welded on described feed circuit plate jointly.
Further, described dipole, described feed static organ, described feed core are co-located on one and are once molded into
On the supporting plastic part of type.
Further, described supporting plastic part include base, be formed on the upside of described base for supporting positioning described
Feed static organ and the outer support member of dipole and the internal stay for supporting positioning described feed core being formed on the upside of described base
Part, described inner supporting member and described outer support member interval setting, and described inner supporting member are surrounded by described outer support member；Described feed circuit plate
It is arranged at described Its lower side, described feed static organ and described feed core are connected to described feed circuit plate through described base
On.
Further, described radiating element arm includes surrounding the side arm of symmetric polygonal and along diagonals of polygon setting
Reinforcement arm, pruning for polygonal one jiao becomes chamfering, and described balancing strut member upper end is connected at described chamfering；Described outer support member
Including the outer column of corresponding four radiating element arms, described radiating element arm positioning is supported in described outer column top, and makes institute
State balancing strut member to be attached on the side of described outer column；Described feed core includes a pair of feed tab of corresponding a pair of dipole,
Each feed tab includes feed tab body, from the galianconism of described feed tab body one end bending formation with from described feed tab body
It is long-armed that other end bending is formed；Described inner supporting member includes the inner column of each feed tab corresponding, and described inner column is formed with
The long-armed slotted eye of each feed tab corresponding, the slot to make way of the galianconism of each feed tab corresponding；Described feed tab body supports fixed
Positioned at described inner column top, described long-armed be connected on described feed circuit plate through described slotted eye, described galianconism is placed in
In described slot to make way.
A kind of wide frequency antenna, including the metallic reflection plate as reflector, in described metallic reflection plate linearly or nonlinearly
At least two ultra-wide-band emission units are set.
A kind of pair of wide frequency antenna, including the metallic reflection plate as reflector, in described metallic reflection plate except linear or
Non-linear setting at least two ultra-wide-band emission units, are additionally provided with multiple low frequency radiating element, wherein partly described ultra broadband
Radiating element is arranged in described low frequency radiating element.
The invention has the beneficial effects as follows: the present invention provides a kind of ultra-wide-band emission unit and antenna, ultra-wide-band emission unit
The dipole arranging including a pair of orthogonal, electrode couple are balanced the feed static organ of feed, the feedback of each dipole feed
Battery core and feed circuit plate；Each dipole, includes the radiating element arm being fixed on feed static organ a pair, wherein radiates single
First arm end both sides downward bending forms bending unit arm；Whole radiating element arm, feed static organ and feed core prop up jointly
Support is arranged on the working of plastics of a single injection-molded, and the end of feed static organ and feed core end are welded in feedback jointly
On electric circuit board, ultra-wide-band emission unit of the present invention and antenna, on the one hand, because radiating element arm end employs downward bending
Mode make radiating element the broadening impedance bandwidth of unit and directional diagram bandwidth in the case that radiating element arm is relatively thin,
So that radiating element is in the light-weighted electric property not sacrificing radiating element simultaneously；On the other hand, whole radiating element
Using panel beating bending structure, and it is supported fixing using an one-time formed working of plastics, so guarantee is light-weighted simultaneously
In turn ensure that the structural strength of whole radiating element, thus realizing miniaturization and the lightweight of radiating element and antenna.
Brief description
Fig. 1 is ultra-wide-band emission unit three-dimensional structural representation of the present invention；
Fig. 2 is ultra-wide-band emission unit top view of the present invention；
Fig. 3 is ultra-wide-band emission unit upward view of the present invention；
Fig. 4 is ultra-wide-band emission unit decomposition structural representation of the present invention；
Fig. 5 is supporting plastic part one viewing angle constructions schematic diagram in the present invention；
Fig. 6 is supporting plastic part another viewing angle constructions schematic diagram in the present invention；
Fig. 7 is widescreen antenna structure view of the present invention；
Fig. 8 is the double widescreen antenna structure view of the present invention；
In conjunction with accompanying drawing, make the following instructions:
1- dipole, 11- radiating element arm, 111- side arm, 112- reinforcement arm, 113- chamfering, 12- bending unit arm, 2-
Feed static organ, 21- balancing strut member, 3- feeds core, 31- feed tab, 311- feed tab body, 312- galianconism, and 313- is long-armed,
4- feed circuit plate, 5- supporting plastic part, 51- base, the outer support member of 52-, 521- outer column, 5211- backstop a, 5212- backstop b,
5213- buckles backstop a, 53- inner supporting member, 531- inner column, 5311- slotted eye, 5312- slot to make way, 5313- backstop c, and 5314- hangs
Button backstop b, 54- horizontal-associate, 55- installed part, 6- metallic reflection plate, 7- low frequency radiating element.
Specific embodiment
In order to be more clearly understood that the technology contents of the present invention, describe in detail especially exemplified by following examples, its purpose is only
It is to be best understood from present disclosure rather than limit the scope of the invention.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of ultra-wide-band emission unit, including a pair of dipole 1, to each dipole
Son is balanced feed static organ 2, the feed core 3 to each dipole feed and the feed circuit plate 4 feeding, described static organ
And described feed core be electrically connected to described feed circuit plate, each dipole, includes symmetrically being fixedly installed on described feed static organ
On two radiating element arms 11, four described radiating element arms are symmetrically set with respect to radiating element center, each spoke
Penetrate the bending unit arm 12 that unit arm end both sides have downward bending formation.So, it is turned under by radiating element arm end
The mode of folding reducing radiating element bore broadening radiating element impedance bandwidth, and by feeding core and feed circuit plate to spoke
The radiating element arm penetrating four crossing polarizations coupling of unit is fed, thus realize radiating element miniaturization and
Lightweight.Here, radiating element arm end both sides refer to the one end away from radiating element center, and radiating element arm end both sides are each
Form a bending unit arm, that is, a radiating element arm is provided with two bending unit arms, and two bending unit arms are in end not
Connect, preferably, bending unit arm is bent into vertical radiation unit arm.
Preferably, whole radiating element is rendered as square structure or eight-sided formation on the projection surface or other are just polygon
Shape structure.This enforcement is preferably square structure, the square structure of specially four radiating element arms, four foursquare spokes
Penetrating unit upper-arm circumference becomes an entirety to become foursquare radiating element, but not limited to this, radiating element arm can also be that other are symmetrical
Polygonized structure, can also be sector, or diamond etc..
Preferably, described feed static organ includes four balancing strut member 21 of corresponding four radiating element arms, described spoke
Penetrate the paracentral one end of unit arm rest to be connected with the upper end of described balancing strut member, described radiating element arm and corresponding described radiation
The balancing strut member of unit arm, bending unit arm are integrally formed by panel beating bending technique, and so, whole radiating element adopts metal plate
Golden bending is formed, and compares die cast it is ensured that light-weighted be also convenient for implementing simultaneously, reduces cost of manufacture.
Preferably, described feed static organ forms microstrip-fed knot as the feed ground structure of feed core with described feed core
Structure.I.e. feed static organ can be as the feed ground structure of feed core, thus defining microstrip feed structures with feed core.
Preferably, described feed static organ and described feed core are welded on feed circuit plate jointly.
Preferably, described dipole, described feed static organ, described feed core are co-located on a single injection-molded
Supporting plastic part 5 on.So, whole radiating element adopts panel beating bending structure, and uses an one-time formed working of plastics
It is supported fixing, ensureing the light-weighted structural strength that simultaneously in turn ensure that whole radiating element.
Preferably, referring to Fig. 5 and Fig. 6, described supporting plastic part includes base 51, is formed at being used on the upside of described base
Support positioning described feed static organ and the outer support member of dipole 52 and be formed on the upside of described base for supporting positioning institute
State the inner supporting member 53 of feed core, described inner supporting member and described outer support member interval setting, and described inner supporting member is by described outer support member bag
Enclose；Described feed circuit plate is arranged at described Its lower side, and described feed static organ and described feed core pass through described base even
It is connected on described feed circuit plate.So, can realize the positioning of radiating element arm and feed static organ is propped up by outer support member
Support, can realize the positioning of feed core is supported by inner support member, thus ensure that the structural strength of whole radiating element.This
In feed core be located at feed static organ and radiating element arm in, constitute couple feed.
Preferably, referring to Fig. 2, Fig. 5 and Fig. 6, described radiating element arm includes side arm 111 and the edge surrounding symmetric polygonal
The reinforcement arm 112 of diagonals of polygon setting, pruning for polygonal one jiao becomes chamfering 113, and described balancing strut member upper end is even
It is connected at described chamfering；Described outer support member includes the outer column 521 of corresponding four radiating element arms, described radiating element arm positioning
It is supported in described outer column top, and so that described balancing strut member is attached on the side of described outer column；Described feed core includes
A pair of feed tab 31 of corresponding a pair of dipole, each feed tab includes feed tab body 311, from described feed tab body one end
The galianconism 312 and from described feed tab body other end bending formation long-armed 313 that bending is formed；Described inner supporting member includes corresponding to
The inner column 531 of each feed tab, described inner column is formed with the long-armed slotted eye 5311 of each feed tab corresponding, corresponds to often
The slot to make way 5312 of the galianconism of individual feed tab；Described feed tab body supports and is positioned described inner column top, described long-armed wears
Cross described slotted eye to be connected on described feed circuit plate, described galianconism is placed in described slot to make way.Preferably, radiating element arm
Including surrounding foursquare four side arms, foursquare diagonal arranges two orthogonal reinforcement arm, and so, radiating element arm is fixed
When position is supported on outer column, can limit, by arranging two backstops a5211 at outer column top, the reinforcement radially extending
Arm swings, and can limit another reinforcement arm by two backstops b5222 of setting and move to radiating element center, more preferably, can
Arrange two by this reinforcement arm opposite side and buckle backstop a5223, realize limiting this reinforcement arm to away from radiating element center side
To while movement, this reinforcement arm being tangled, thus radiating element arm is pressed to the top of outer column, realizing propping up with more preferable
The function of support positioning radiating element arm.Here, the paracentral one end of radiating element arm rest (at chamfering) and balancing strut member is upper
End connects, and makes balancing strut member perpendicular to radiating element arm, therefore, balancing strut member can be adjacent to and navigate on outer column side,
Positioned, balancing strut member lower end passes through reserved via on base, to be welded on feed circuit plate.For feed core just
When a pair of the feed tab handed over is supported positioning, can using backstops c5313 at two groups of intervals to the feed tab of each feed tab this
Body two ends carry out spacing, are swung with limiting feed tab, it is also possible to using buckling the structure of backstop b5314 by feed tab
Compression navigates to the top of inner column.More preferably, four outer columns pass sequentially through horizontal company 54 near top and are fixed together.
The installed part 55 being fixed on antenna metal reflecting plate is reserved with the base of supporting plastic part.
Referring to Fig. 7, a kind of wide frequency antenna, including the metallic reflection plate 6 as reflector, linear in described metallic reflection plate
Or non-linear setting at least two described in ultra-wide-band emission unit.
Referring to Fig. 8, a kind of pair of wide frequency antenna, including the metallic reflection plate as reflector, described metallic reflection plate is removed
Linearly or nonlinearly the ultra-wide-band emission unit described in setting at least two, is additionally provided with multiple low frequency radiating element 7, wherein
Partly described ultra-wide-band emission unit may be provided in described low frequency radiating element, to reach the purpose of integral utilization space.?
In other embodiment, ultra-wide-band emission unit and low frequency radiating element can be independently arranged.
To sum up, the present invention is directed to existing and future communications market lightweight demand, there is provided a kind of structure is simple, plus
Work is convenient, and has ultra-wide-band emission unit and the antenna of superperformance in double frequency and double frequency use above.
Above example is referring to the drawings, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art
Member by the modification on various forms or change are carried out to above-described embodiment, but without departing substantially from the essence of the present invention in the case of, all
Fall within the scope and spirit of the invention.
Claims (10)
1. a kind of ultra-wide-band emission unit, is balanced the feed balance feeding including a pair of dipole (1), to each dipole
Device (2), the feed core (3) to each dipole feed and feed circuit plate (4), described static organ and the electrical connection of described feed core
To described feed circuit plate it is characterised in that: each dipole, includes symmetrically be fixedly installed on described feed static organ two
Individual radiating element arm (11), four described radiating element arms are symmetrically set with respect to radiating element center, and each radiation is single
First arm end both sides have the bending unit arm (12) of downward bending formation.
2. ultra-wide-band emission unit according to claim 1 it is characterised in that: whole radiating element presents on the projection surface
For square structure or eight-sided formation or other regular polygon structures.
3. ultra-wide-band emission unit according to claim 1 it is characterised in that: described feed static organ includes corresponding four
Four balancing strut member (21) of radiating element arm, described paracentral one end of radiating element arm rest and described balancing strut member
Upper end connects, and the balancing strut member of described radiating element arm and corresponding described radiating element arm, bending unit arm are rolled over by panel beating
Bending process is integrally formed.
4. ultra-wide-band emission unit according to claim 3 it is characterised in that: described feed static organ is as feed core
Feed ground structure forms microstrip feed structures with described feed core.
5. ultra-wide-band emission unit according to claim 3 it is characterised in that: described feed static organ and described feed core
Jointly it is welded on described feed circuit plate.
6. ultra-wide-band emission unit according to claim 3 it is characterised in that: described dipole, described feed static organ,
Described feed core is co-located on the supporting plastic part (5) of a single injection-molded.
7. ultra-wide-band emission unit according to claim 6 it is characterised in that: described supporting plastic part includes base
(51), be formed on the upside of described base for support positioning described feed static organ and the outer support member of dipole (52) and formed
The inner supporting member (53) for supporting positioning described feed core on the upside of described base, described inner supporting member and described outer support member interval
Arrange, and described inner supporting member is surrounded by described outer support member；Described feed circuit plate is arranged at described Its lower side, and described feed is put down
Weighing apparatus and described feed core are connected on described feed circuit plate through described base.
8. ultra-wide-band emission unit according to claim 7 it is characterised in that: described radiating element arm includes surrounding symmetrical
Polygonal side arm (111) and the reinforcement arm (112) along diagonals of polygon setting, pruning for polygonal one jiao becomes chamfering
(113), described balancing strut member upper end is connected at described chamfering；Described outer support member includes the outer of corresponding four radiating element arms
Column (521), described radiating element arm positioning is supported in described outer column top, and it is described outer so that described balancing strut member is attached to
On the side of column；Described feed core includes a pair of feed tab (31) of corresponding a pair of dipole, and each feed tab includes feeding
Piece body (311), from the bending of described feed tab body one end formed galianconism (312) and from the described feed tab body other end folding
Long-armed (313) that bending becomes；Described inner supporting member includes the inner column (531) of each feed tab corresponding, and described inner column is formed
There are long-armed slotted eye (5311), the slot to make way (5312) of the galianconism of each feed tab corresponding of each feed tab corresponding；Described feedback
Electric piece body supports and is positioned described inner column top, described long-armed be connected on described feed circuit plate through described slotted eye,
Described galianconism is placed in described slot to make way.
9. a kind of wide frequency antenna, including as reflector metallic reflection plate (6) it is characterised in that: in described metallic reflection plate
At least two ultra-wide-band emission units as described in any one in claim 1-8 are linearly or nonlinearly set.
10. a kind of pair of wide frequency antenna, including as reflector metallic reflection plate it is characterised in that: in described metallic reflection plate
Except linearly or nonlinearly arranging at least two ultra-wide-band emission units as described in any one in claim 1-8, also set
It is equipped with multiple low frequency radiating element (7), wherein partly described ultra-wide-band emission unit is arranged in described low frequency radiating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928844.1A CN106356630B (en) | 2016-10-31 | 2016-10-31 | Ultra-wideband radiating element and antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928844.1A CN106356630B (en) | 2016-10-31 | 2016-10-31 | Ultra-wideband radiating element and antenna |
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| Publication Number | Publication Date |
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| CN106356630A true CN106356630A (en) | 2017-01-25 |
| CN106356630B CN106356630B (en) | 2023-12-26 |
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| CN201610928844.1A Active CN106356630B (en) | 2016-10-31 | 2016-10-31 | Ultra-wideband radiating element and antenna |
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| WO2019011030A1 (en) * | 2017-07-10 | 2019-01-17 | 武汉虹信通信技术有限责任公司 | Bowl-shaped dual-polarized base station antenna radiating unit and antenna |
| CN109980329A (en) * | 2019-03-12 | 2019-07-05 | 广东司南通信科技有限公司 | A kind of broadband dual polarized antenna |
| WO2019206148A1 (en) * | 2018-04-26 | 2019-10-31 | 罗森伯格技术（昆山）有限公司 | Ultra wide band radiation unit |
| CN114498003A (en) * | 2022-03-04 | 2022-05-13 | 电子科技大学 | A dual-polarized electromagnetic dipole antenna with low profile and low cross-polarization |
| TWI847458B (en) * | 2022-09-30 | 2024-07-01 | 大陸商蘇州立訊技術有限公司 | Antenna element and antenna |
| US12148986B2 (en) | 2019-03-29 | 2024-11-19 | Outdoor Wireless Networks LLC | Radiator for antenna and base station antenna |
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| CN114498003A (en) * | 2022-03-04 | 2022-05-13 | 电子科技大学 | A dual-polarized electromagnetic dipole antenna with low profile and low cross-polarization |
| CN114498003B (en) * | 2022-03-04 | 2022-11-15 | 电子科技大学 | A low-profile low-cross-polarized dual-polarized electromagnetic dipole antenna |
| TWI847458B (en) * | 2022-09-30 | 2024-07-01 | 大陸商蘇州立訊技術有限公司 | Antenna element and antenna |
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| CN106356630B (en) | 2023-12-26 |
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