WO2019206148A1 - 一种超宽带辐射单元 - Google Patents

一种超宽带辐射单元 Download PDF

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Publication number
WO2019206148A1
WO2019206148A1 PCT/CN2019/083933 CN2019083933W WO2019206148A1 WO 2019206148 A1 WO2019206148 A1 WO 2019206148A1 CN 2019083933 W CN2019083933 W CN 2019083933W WO 2019206148 A1 WO2019206148 A1 WO 2019206148A1
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WO
WIPO (PCT)
Prior art keywords
vibrator
ultra
vibrator arm
support member
limiting
Prior art date
Application number
PCT/CN2019/083933
Other languages
English (en)
French (fr)
Inventor
田龙
姜涛
孙静
王卫
Original Assignee
罗森伯格技术（昆山）有限公司
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Application filed by 罗森伯格技术（昆山）有限公司 filed Critical 罗森伯格技术（昆山）有限公司
Publication of WO2019206148A1 publication Critical patent/WO2019206148A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Definitions

  • the present invention relates to the field of mobile communications, and to antenna network systems, and more particularly to an ultra-wideband radiating element for use as a base station antenna.
  • Ultra-wideband antenna communication technology generally refers to a radio technology with a signal bandwidth greater than 1.5 GHz or a bandwidth ratio (signal width to center frequency ratio) greater than 25%.
  • Ultra-wideband antennas are key components in ultra-wideband wireless communication systems, and the performance of the antenna will directly affect the performance of the entire system.
  • the radiating element includes a pair of orthogonally disposed dipoles, a balanced feeder for balancing the dipoles, and a feed.
  • the feed cells are collectively disposed on a single injection molded support plastic piece, and the end of the feed balancer and the end of the feed core are commonly soldered to the feed circuit board.
  • the radiation unit widens the impedance bandwidth of the unit and the bandwidth of the pattern due to the downward bending of the ends of the end of the radiating unit arm, so that the radiating unit is lightened without sacrificing the radiating unit.
  • the entire radiating element adopts a sheet metal bending structure and is supported and fixed by a one-piece plastic part, which ensures weight reduction while ensuring the structural strength of the entire radiating element, thereby realizing the radiating element. And the miniaturization and weight reduction of the antenna.
  • the above patents still have the following defects: 1.
  • the bending unit arms are formed on both sides of the end of the radiating unit arm. Although the bandwidth of the unit is widened to some extent, there is still room for further improvement; 2.
  • the radiating unit arm and The feed balancer is designed in one piece with insufficient flexibility. 3.
  • the structure of the feed core, the balancer, and the plastic support member supporting the radiating unit arm is complicated, resulting in a complicated structure of the entire radiating element, which leads to an increase in the overall weight of the vibrator.
  • An object of the present invention is to overcome the deficiencies of the prior art and to provide an ultra-wideband radiating element that realizes miniaturization and weight reduction of a base station antenna in the case of widening the operating frequency band of the vibrator.
  • an ultra-wideband radiation unit including a radiation unit, a support member for supporting the radiation unit, and a feed plate, the radiation unit including four vibrator arms, two for each The vibrator arms are symmetrically disposed on the support member, and the feed plate is fedly coupled to the vibrator arm through the support member, and each side of each vibrator arm has a bent portion formed by bending downward.
  • the vibrator arm, the support member and the feed plate are detachably mounted, and the support member is an insulating material.
  • the support member includes four support portions corresponding to four vibrator arms, and the feed plate sequentially passes through the support portion and the corresponding vibrator arm to be electrically coupled to the vibrator arm.
  • a coupling portion extends outwardly on one side of the vibrator arm, and the coupling portion and the supporting portion corresponding thereto are respectively provided with a limiting card slot through which the feeding plate passes.
  • the coupling portion is formed to extend outward from a lower end of the bent portion of one side of the vibrator arm.
  • the vibrator arm is further limited to the corresponding support portion by the limiting structure.
  • the limiting structure includes a limiting hole disposed on the vibrator arm and an elastic limiting member disposed on the supporting portion, wherein the elastic limiting member is formed with a limiting step, and the elastic limiting member is worn After the limit hole, the limit step is clamped to the vibrator arm.
  • the feeding board is two PCB feeding boards that cross each other, and after the crossing, the feeding board ends form four feeding ends corresponding to the four vibrator arms, and each of the feeding ends
  • the portion forms a feeding protrusion, and the feeding protrusion sequentially passes through the limiting card slot on the supporting portion and the coupling portion.
  • the support member is further provided with a mounting portion for preserving the spacer.
  • the central position of the bent portion is provided with a protruding mounting post.
  • the vibrator arm is a sheet metal member
  • the support member is a plastic support member
  • the feed plate is a PCB feed plate.
  • the vibrator arm is at least one of a square, a circular, a diamond, and a fan-shaped vibrator arm.
  • the four support portions are generally or approximately butterfly-shaped.
  • the two feed plate bodies are crossed.
  • the coupling portion is perpendicular to the bent portion.
  • the present invention also discloses another technical solution: a broadband antenna comprising a metal reflector, and the metal reflector is provided with at least two ultra-wideband radiating elements.
  • the metal reflector is further provided with at least one low frequency oscillator coaxially arranged with the ultra-wideband radiation unit.
  • Each side of the vibrator arm is provided with a downward bending feature, which maximizes the radiation area of the vibrator arm without increasing the projected area, thereby widening the characteristics of the vibrator working frequency band and achieving a relative bandwidth of 75%.
  • the operating frequency band of the base station antenna unit of the present invention can be flexibly adjusted to cover 1400-2700 MHz or cover 1695-3700 MHz.
  • the vibrator arm, the support member and the feed plate are detachably mounted, and the assembly is simple, convenient and flexible.
  • the mating structure of the thin gold vibrator arm, the plastic support member and the PCB feed plate, the vibrator arm has a simple structure and is easy to replace;
  • the plastic support member adopts a plastic form to provide a firm support capability and also serves as a limit bending blade.
  • the function not only strengthens the strength of the unit but also facilitates the assembly;
  • the feed plate adopts the form of PCB feeding and has the characteristics of flexible and adjustable.
  • the base station antenna unit formed by the combination of the three is simple in structure, light in overall weight, easy to manufacture and manufacture, and greatly reduces production cost.
  • the base station antenna unit of the present invention is small overall, is easy to miniaturize the base station antenna, and can work independently, and can also be coaxially arranged with other frequency band oscillators.
  • FIG. 1 is a schematic structural diagram of a base station antenna unit of the present invention
  • FIGS. 2 and 3 are schematic diagrams showing a partial exploded structure of a base station antenna unit of the present invention
  • FIG. 4 is a schematic diagram of a complete explosion structure of a base station antenna unit of the present invention.
  • Figure 5 is a schematic enlarged view of a portion (stopper 22) of Figure 4.
  • Figure 6 is a schematic enlarged view of a portion (mounting portion 28) of Figure 4.
  • FIG. 7 is a schematic structural diagram of a broadband antenna according to an embodiment of the present invention.
  • an ultra-wideband radiation unit disclosed by the present invention includes a radiation unit, a support member 2 and a feed plate 3, and the radiation unit is supported on the support member 2, and the feed plate 3 passes through the support.
  • the piece 2 is electrically coupled to the radiating element, the radiating element comprising four vibrator arms 1, each side of each vibrator arm 1 having a bent portion 11 formed by bending downwards, the invention passing through each side of the vibrator arm 1
  • the feature of downward bending effectively widens the radiation area of the vibrator arm 1 without increasing the projected area, thereby widening the characteristics of the operating frequency band of the vibrator.
  • each of the two vibrator arms 1 is symmetrically disposed on the support member 2 to form a dipole.
  • the two vibrator arms 1 are preferably on the same straight line or approximately on the same straight line, and the four vibrator arms 1 form a pair of couples.
  • a pole that is, a dual polarized radiation unit is formed.
  • each side of each vibrator arm 1 is bent downward to form a bent portion 11, and the ends of the adjacent two bent portions 11 are not connected.
  • the bent portion 11 is preferably The side of the self-vibrator arm 1 is bent vertically downward to effectively widen the working frequency band of the vibrator.
  • the vibrator arm 1 is entirely made of thin sheet metal, and the weight is light, and the entire vibrator arm 1 is light and compact, has a simple structure, and is easy to replace.
  • the shape of the vibrator arm 1 can be various, such as a square shape in the embodiment, and can also be replaced by a circle, a diamond shape, a fan shape, etc., so that the shape of the radiation unit formed by the four vibrator arms 1 can also be various, such as In the embodiment, the whole is also a square structure, and may also be an octagonal structure or other regular polygonal structure.
  • each of the vibrator arms 1 is further provided with a through hole limiting hole 12 for cooperating with a corresponding limiting structure on the supporting member 2, and the vibrator arm 1 is limited to the supporting member 2
  • a coupling portion 13 is formed on one side of each of the vibrator arms 1 (the innermost side of the vibrator arm 1), and a limiting card slot 14 is defined in the coupling portion 13 for the feed plate 3 to be worn.
  • the support 2 is located below the radiating element for supporting the radiating element.
  • the support member 2 is an insulating material, preferably a plastic support member, which includes four integrally formed support portions 21, each of which has a position corresponding to the vibrator arm 1, that is, each support portion 21 is located. Below the corresponding vibrator arm 1.
  • the shape of the support portion 21 may be plural, and the shape may be identical to or different from the vibrator arm 1.
  • the support member 2 formed by the combination of the four support portions 21 is generally or approximately butterfly-shaped, and may of course be other shapes. This application does not limit this, as long as it can support the radiation unit. .
  • the vibrator arm 1 is also limited to the corresponding support portion 21 by the limiting structure, so that the vibrator arm 1 and the support portion 21 are firmly mounted.
  • the limiting structure specifically includes the limiting hole 12 disposed on the vibrator arm coupling portion 13 and the elastic limiting member 22 disposed on the supporting portion 21.
  • the elastic limiting member 22 is integrally formed with the supporting portion 21, and includes two oppositely disposed limiting posts 23. The two limiting posts 23 have adjustable gaps 24 therebetween, and the lower ends of each of the limiting posts 23 are fixed to the supporting portion.
  • a limiting portion 25 is formed to extend outwardly, and a limiting step 26 is formed between the limiting portion 25 and the limiting post 23 .
  • the size of the adjustable gap 24 is reduced by an external force (such as pinching the two limiting posts 23 inwardly), so that the elastic limiting member 22 can be passed through the limiting hole 12, After the limiting hole 12 passes through, the external force on the limiting member 22 is removed, and the adjustable gap 24 is restored, so that the elastic limiting member 22 passes through the limiting hole 12 and the limiting step 26 is clamped on the vibrator arm 1.
  • the limit structure here can also be replaced by other conventional replacement structures, as long as the vibrator arm 1 is limited to the support portion 21.
  • the support member 2 of the present application adopts a plastic form, and also provides a function of limiting the bending of the vibrator arm 1 while providing a firm supporting capability, which not only enhances the strength of the unit but also facilitates assembly.
  • each of the support portions 21 correspondingly defines a limit card slot 27 corresponding to the limit card slot 14 on the vibrator arm coupling portion 13.
  • the limit card slot 27 on both sides The phases are coincident for the feed plate 3 to pass through.
  • the limit card slot 27 is elongated.
  • the support member 2 is further provided with at least one mounting post 28, and the mounting post 28 may or may not be mounted according to the performance requirements of the antenna.
  • the mounting post 28 is disposed at a central position of the support member 2, and four mounting posts 28 are evenly distributed along the center of the support member 2, and the spacers are mounted on the support member 2 through the mounting posts 28.
  • the feed plate 3 is located below the support 2, the upper end of which is fed-coupled to the vibrator arm 1 via the support 2.
  • the feeding plate 3 includes two feeding plate bodies 31 intersecting each other, preferably a cross. After the crossing, the upper ends of the feeding plate 3 form four feedings corresponding to the four vibrator arms 1.
  • the electric terminal portion 32, each of the feeding end portions 32 is upwardly convexly formed with a feeding protrusion 33, and the feeding protrusion 33 sequentially passes through the corresponding support portion 21 and the limit on the coupling portion 13
  • the card slots 27, 14 thereby feed the power supply plate 3 to the vibrator arm 1.
  • the feeding board 3 is preferably a PCB feeding board, which has the characteristics of flexible adjustment, light weight, easy production and manufacture, and low cost.
  • the four vibrator arms 1 are respectively mounted on the four support portions 21, and the elastic limit members 22 on the support portion 21 are fastened.
  • the two PCB feed plate bodies 31 are assembled with the support member 2 through the limit card slots 27, 14 to realize the feed coupling with the vibrator arm 1, and the entire assembly process is simple and convenient.
  • the invention broadens the characteristics of the vibrator working frequency band and achieves a relative bandwidth of 75%; based on the 75% bandwidth characteristic, the working frequency band of the base station antenna unit of the present invention can be flexibly adjusted to cover 1400-2700 MHz or cover 1695-3700 MHz.
  • the antenna includes a metal reflector 4, and at least two of the above ultra-widebands are disposed on the metal reflector 4.
  • the radiating element and the at least one low frequency vibrator 5, the low frequency vibrator 5 and the ultra wideband radiating element are arranged coaxially (horizontal axis in FIG. 6).
  • five vibrators of the invention and two low frequencies are disposed on the metal reflecting plate 4.
  • Vibrator 5 As described above, due to the ultra-wideband characteristics of the base station antenna unit of the present invention, the array antenna of the present invention can achieve the frequency division effect of 1695-2400 MHz and 3550-3700 MHz in a limited space.
  • At least two of the above-described ultra-wideband radiating elements may be provided on the metal reflecting plate 4.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明揭示了一种超宽带辐射单元，所述基站天线单元包括辐射单元、用于支撑辐射单元的支撑件和馈电板，辐射单元包括四个振子臂，每两个振子臂对称设置在支撑件上，馈电板穿过支撑件与振子臂馈电耦合，每个振子臂的每个侧边具有向下折弯形成的折弯部。本发明在展宽振子工作频段的情况下，进一步实现基站天线的小型化、轻量化。

Description

一种超宽带辐射单元 技术领域
本发明涉及一种移动通信领域，应用于天线网络系统，尤其是涉及一种用作基站天线的超宽带辐射单元。
背景技术
超宽带天线通信技术(UWB)通常是指信号带宽大于1.5GHz或带宽比(信号宽度与中心频率之比)大于25％的无线电技术。超宽带天线是超宽带无线通信系统中的关键部件，天线的性能将直接影响整个系统的性能。
随着移动通信技术的高速发展，多频超宽频基站天线已成为未来天线发展的趋势，天线内的辐射单元数量也将成倍增加，因此设备商以及运营商对天线的尺寸以及重量的要求日益严格，因此天线中辐射单元等部件的小型化，轻量化的变得日益重要。
现有申请号为CN201610928844.1的中国专利文献中公开了一种超宽带辐射单元及天线，其辐射单元包括一对正交设置的偶极子、对偶极子进行平衡馈电的平衡器、馈电芯以及馈电电路板；每个偶极子包括一对固定于馈电平衡器上的辐射单元臂，其中辐射单元臂末端两侧向下折弯；整个辐射单元臂，馈电平衡器，馈电芯共同设置在一次注塑成型的支撑塑料件上，馈电平衡器的末端以及馈电芯末端共同焊接于馈电电路板上。
在上述专利文献中，一方面由于辐射单元臂末端两侧采用了向下折弯的方式使得辐射单元展宽了单元的阻抗带宽以及方向图带宽，从而使得辐射单元在轻量化的同时不牺牲辐射单元的电气性能；另一方面，整个辐射单元采用钣金折弯结构，并使用一个一次成型的塑料件进行支撑固定，这 样保证轻量化的同时又保证了整个辐射单元的结构强度，从而实现辐射单元及天线的小型化以及轻量化。
但是上述专利仍然存在以下几点缺陷：1、折弯单元臂形成在辐射单元臂末端的两侧，虽然一定程度上展宽了单元的带宽，但是仍有进一步改进的空间；2、辐射单元臂与馈电平衡器一体设计，灵活性不够；3、馈电芯、平衡器、支撑辐射单元臂的塑料支撑件结构复杂，导致整个辐射单元结构偏复杂，进而导致振子整体重量加重。
发明内容
本发明的目的在于克服现有技术的缺陷，提供一种在展宽振子工作频段的情况下，实现基站天线的小型化、轻量化的超宽带辐射单元。
为实现上述目的，本发明提出如下技术方案：一种超宽带辐射单元，其包括辐射单元、用于支撑辐射单元的支撑件和馈电板，所述辐射单元包括四个振子臂，每两个振子臂对称设置在支撑件上，所述馈电板穿过支撑件与振子臂馈电耦合，每个振子臂的每个侧边具有向下折弯形成的折弯部。
优选地，所述振子臂、支撑件和馈电板之间可拆卸安装，所述支撑件为绝缘材料。
优选地，所述支撑件包括对应四个振子臂的四个支撑部，所述馈电板依次穿过支撑部和对应的振子臂，与振子臂馈电耦合。
优选地，所述振子臂的一侧边上向外延伸出一耦合部，所述耦合部和与其对应的所述支撑部上均设有供馈电板穿过的限位卡槽。
优选地，所述耦合部自振子臂的一侧边的折弯部的下端向外延伸形成。
优选地，所述振子臂还通过限位结构限位于相应的支撑部上。
优选地，所述限位结构包括设置在振子臂上的限位孔及设置在支撑部上的弹性限位件，所述弹性限位件上形成有一限位台阶，所述弹性限位件穿过限位孔后限位台阶卡持于振子臂。
优选地，所述馈电板为两片相互交叉的PCB馈电板，交叉后所述馈电 板上端形成与四个振子臂相对应的四个馈电端部，每个所述馈电端部形成一馈电凸起，所述馈电凸起依次穿过所述支撑部和耦合部上的限位卡槽。
优选地，所述支撑件上还设有预留安装隔离片的安装部。
优选地，所述折弯部的中心位置设有突出的安装柱。
优选地，所述振子臂为钣金件，所述支撑件为塑料支撑件，所述馈电板为PCB馈电板。
优选地，所述振子臂至少为方形、圆形、菱形、扇形振子臂中的一种。
优选地，四个所述支撑部整体呈或近似呈蝶形。
优选地，两片馈电板体十字交叉。
优选地，所述耦合部与折弯部相垂直。
本发明还揭示了另外一种技术方案：一种宽频天线，包括一金属反射板，所述金属反射板上设置至少两个超宽带辐射单元。
优选地，所述金属反射板上还设置有至少一个与所述超宽带辐射单元共轴排列的低频振子。
本发明的有益效果是：
1、振子臂的每边都设置向下折弯的特征，在不增加投影面积的情况下最大程度的展宽了振子臂的辐射面积，从而达到拓宽振子工作频段的特性，达到75％的相对带宽；基于75％的带宽特征，本发明基站天线单元的工作频段可以灵活的调整为覆盖1400-2700MHz或者覆盖1695-3700MHz。
2、振子臂、支撑件和馈电板之间可拆卸安装，组装简单便利、灵活。
3、薄钣金振子臂、塑料支撑件、PCB馈电板的配合结构，振子臂结构简单，易于替换；塑料支撑件采用塑料形式在提供牢固支撑能力的同时还起到了限位折弯叶片的作用，不仅加强了单元的强度而且给组装提供便利；馈电板采用PCB馈电的形式，具有灵活可调的特点。且三者组合形成的基站天线单元结构简单，整体重量较轻，易于生产和制造，且极大地降低了生产成本。
4、本发明基站天线单元整体较小，易于基站天线小型化，且能够独立工作，也能够与其他频段振子实现共轴排列。
附图说明
图1是本发明基站天线单元的结构示意图；
图2、图3是本发明基站天线单元的部分爆炸结构示意图；
图4是本发明基站天线单元的完全爆炸结构示意图；
图5是图4中部分(限位件22)放大结构示意图；
图6是图4中部分(安装部28)放大结构示意图；
图7是本发明其中一实施例宽频天线的结构示意图。
附图标记：
1、振子臂，11、折弯部，12、限位孔，13、耦合部，14、限位卡槽，2、支撑件，21、支撑部，22、限位件，23、限位柱，24、间隙，25、限位部，26、限位台阶，27、限位卡槽，28、安装柱，3、馈电板，31、馈电板体，32、馈电端部，33、馈电凸起，4、金属反射板，5、低频振子。
具体实施方式
下面将结合本发明的附图，对本发明实施例的技术方案进行清楚、完整的描述。
结合图1～图4所示，本发明所揭示的一种超宽带辐射单元，包括辐射单元、支撑件2和馈电板3，辐射单元支撑于支撑件2上，馈电板3穿过支撑件2与辐射单元馈电耦合，辐射单元包括四个振子臂1，每个振子臂1的每个侧边都具有向下折弯形成的折弯部11，本发明通过振子臂1的每边具有向下折弯的特征，在不增加投影面积的情况下有效的展宽了振子臂1的辐射面积，从而达到拓宽振子工作频段的特性。
具体地，每两个振子臂1在支撑件2上对称设置，形成一偶极子，两个振子臂1优选为在同一直线上或近似在同一直线上，四个振子臂1则形 成一对偶极子，即形成双极化辐射单元。本实施例中，每个振子臂1的每个侧边均向下折弯形成一折弯部11，相邻两个折弯部11的端部之间不连接.所述折弯部11优选自振子臂1的侧边垂直向下折弯形成，有效拓宽了振子工作频段。
更进一步地，本实施例中，振子臂1整体采用薄钣金材质，重量较轻，且整个振子臂1轻质小巧，结构简单，易于更换。振子臂1的形状可以有多种，如本实施例中为方形，也可替换为圆形、菱形、扇形等，这样四个振子臂1形成的辐射单元的形状也可以是多种，如本实施例中整体也为方形结构，也可为八边形结构或其他正多边形结构。
另外，结合图2和图4所示，每个振子臂1上还设置一贯穿的限位孔12，用于与支撑件2上对应的限位结构配合，将振子臂1限位于支撑件2上；且每个振子臂1的其中一侧边(振子臂1最内侧的一侧边)上延伸出一耦合部13，耦合部13上开设一限位卡槽14，供馈电板3穿过。
支撑件2位于辐射单元的下方，用于对辐射单元进行支撑。本实施例中，支撑件2为绝缘材料，优选为塑料支撑件，其包括一体成型的四个支撑部21，每个支撑部21的位置与振子臂1相对应，即每个支撑部21位于相应的振子臂1的下方。与振子臂1同理，支撑部21的形状也可为多种，可以形状与振子臂1一致，也可不一致。本实施例中，四个支撑部21组合形成的支撑件2整体呈或近似呈蝶形，当然也可为其他形状，本申请对此不做限定，只要能起到支撑辐射单元的作用即可。
优选地，振子臂1还通过限位结构限位于相应的支撑部21上，使得振子臂1和支撑部21之间安装牢固。本实施例中，该限位结构具体包括设置在振子臂耦合部13上的上述限位孔12和设置在支撑部21上的弹性限位件22，本实施例中，结合图5所示，弹性限位件22与支撑部21一体成型，其包括两根相对设置的限位柱23，两根限位柱23之间具有可调间隙24，且每根限位柱23下端固定于支撑部21上，上端向外延伸形成一限位部25， 限位部25与限位柱23之间形成限位台阶26。这样，因为可调间隙24的存在，通过外力(如将两根限位柱23向内捏紧)缩小可调间隙24的大小，使得弹性限位件22可供限位孔12穿过，在限位孔12穿过后，撤去限位件22上的外力，可调间隙24恢复，使得弹性限位件22穿过限位孔12后限位台阶26卡持于振子臂1上。当然这里的限位结构也可使用其他常规替换结构替换，只要实现将振子臂1限位于支撑部21上即可。本申请支撑件2采用塑料形式，在提供牢固支撑能力的同时还起到了限位折弯振子臂1的作用，不仅加强了单元的强度而且给组装提供便利。
另外，每个支撑部21对应振子臂耦合部13上的限位卡槽14也相应设置一限位卡槽27，振子臂1安装到支撑部21上后，两者上的限位卡槽27相重合，可供馈电板3穿过。本实施例中，限位卡槽27为长条形的。
更进一步地，结合图4和图6所示，支撑件2上还设有突出的至少一安装柱28，该安装柱28上可以根据天线性能需求安装上隔离片，也可不安装。本实施例中，该安装柱28设置在支撑件2的中心位置处，且设置四个沿支撑件2的中心均匀分布安装柱28，隔离片通过这些安装柱28安装于支撑件2上。
馈电板3位于支撑件2的下方，其上端穿过支撑件2与振子臂1馈电耦合。具体地，本实施例中，馈电板3包括两片相交叉的馈电板体31，优选为十字交叉，交叉后，馈电板3上端形成与四个振子臂1相对应的四个馈电端部32，每个所述馈电端部32上向上凸起形成一馈电凸起33，该馈电凸起33依次穿过与之相应的支撑部21和耦合部13上的限位卡槽27、14，从而使馈电板3与振子臂1馈电耦合。
本实施例中，馈电板3优选为PCB馈电板，具有灵活可调的特点，且重量较轻，易于生产和制造，成本较低。
组装时，将四个振子臂1分别对应安装在四个支撑部21上，通过支撑部21上的弹性限位件22实现紧固。两片PCB馈电板体31穿过限位卡槽 27、14与支撑件2组装在一起，实现与振子臂1的馈电耦合，整个组装过程简单便利。
本发明拓宽了振子工作频段的特性，达到75％的相对带宽；基于75％的带宽特征，本发明基站天线单元的工作频段可以灵活的调整为覆盖1400-2700MHz或者覆盖1695-3700MHz。
本发明实施例所揭示的一种采用上述超宽带辐射单元而设计的阵列天线，如图7所示，该天线包括一金属反射板4，所述金属反射板4上设置至少两个上述超宽带辐射单元及至少一个低频振子5，低频振子5与超宽带辐射单元共轴(图6中的横轴)排列，本实施例中，金属反射板4上设置了5个本发明振子和2个低频振子5。如上述所描述，因本发明基站天线单元超宽带特性，本发明阵列天线才得以在有限的空间内实现1695-2400MHz和3550-3700MHz的分频效果。
可替换地，金属反射板4上还可只设置至少两个上述超宽带辐射单元。
本发明的技术内容及技术特征已揭示如上，然而熟悉本领域的技术人员仍可能基于本发明的教示及揭示而作种种不背离本发明精神的替换及修饰，因此，本发明保护范围应不限于实施例所揭示的内容，而应包括各种不背离本发明的替换及修饰，并为本专利申请权利要求所涵盖。

Claims (10)

  1. 一种超宽带辐射单元，其包括辐射单元、用于支撑辐射单元的支撑件和馈电板，所述辐射单元包括四个振子臂，每两个振子臂对称设置在支撑件上，其特征在于，所述馈电板穿过支撑件与振子臂馈电耦合，每个振子臂的每个侧边具有向下折弯形成的折弯部。
  2. 根据权利要求1所述的超宽带辐射单元，其特征在于，所述振子臂、支撑件和馈电板之间可拆卸安装，所述支撑件为绝缘材料。
  3. 根据权利要求1或2所述的超宽带辐射单元，其特征在于，所述支撑件包括对应四个振子臂的四个支撑部，所述馈电板依次穿过支撑部和对应的振子臂，与振子臂馈电耦合。
  4. 根据权利要求3所述的超宽带辐射单元，其特征在于，所述振子臂的一侧边上向外延伸出一耦合部，所述耦合部和与其对应的所述支撑部上均设有供馈电板穿过的限位卡槽。
  5. 根据权利要求4所述的超宽带辐射单元，其特征在于，所述耦合部自振子臂的一侧边的折弯部的下端向外延伸形成。
  6. 根据权利要求3所述的超宽带辐射单元，其特征在于，所述振子臂还通过限位结构限位于相应的支撑部上。
  7. 根据权利要求6所述的超宽带辐射单元，其特征在于，所述限位结构包括设置在振子臂上的限位孔及设置在支撑部上的弹性限位件，所述弹性限位件上形成有一限位台阶，所述弹性限位件穿过限位孔后限位台阶卡持于振子臂。
  8. 根据权利要求4所述的超宽带辐射单元，其特征在于，所述馈电板为两片相互交叉的PCB馈电板，交叉后所述馈电板上端形成与四个振子臂相对应的四个馈电端部，每个所述馈电端部形成一馈电凸起，所述馈电凸起依次穿过所述支撑部和耦合部上的限位卡槽。
  9. 根据权利要求1所述的超宽带辐射单元，其特征在于，所述支撑件的中心位置设有突出的安装柱。
  10. 根据权利要求1所述的超宽带辐射单元，其特征在于，所述折弯部自振子臂的侧边垂直向下折弯形成。
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