WO2021027350A1 - 一种具有抑制高频寄生辐射功能的超宽带低频辐射单元 - Google Patents

一种具有抑制高频寄生辐射功能的超宽带低频辐射单元 Download PDF

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WO2021027350A1
WO2021027350A1 PCT/CN2020/090061 CN2020090061W WO2021027350A1 WO 2021027350 A1 WO2021027350 A1 WO 2021027350A1 CN 2020090061 W CN2020090061 W CN 2020090061W WO 2021027350 A1 WO2021027350 A1 WO 2021027350A1
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radiation
impedance line
frequency
low
arm
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PCT/CN2020/090061
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English (en)
French (fr)
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洪何知
李渊
冯海明
章亚
张丰臣
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昆山恩电开通信设备有限公司
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Publication of WO2021027350A1 publication Critical patent/WO2021027350A1/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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • 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
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Definitions

  • the invention belongs to the technical field of radiation units, and specifically relates to an ultra-wideband low-frequency radiation unit with a function of suppressing high-frequency parasitic radiation.
  • this solution designs an ultra-wideband low-frequency radiation unit with the function of suppressing high-frequency parasitic radiation. It has the function of suppressing high-frequency parasitic radiation, which can ensure that the two vibrators are closer to each other.
  • the radiation performance of these frequency bands has a small impact, thereby achieving a high degree of integration of base station antennas, further reducing the number of antennas, and reducing construction and operating costs.
  • the purpose of the present invention is to provide an ultra-wideband low-frequency radiation unit with a function of suppressing high-frequency parasitic radiation.
  • an ultra-wideband low-frequency radiation unit with the function of suppressing high-frequency parasitic radiation including a dielectric substrate and a radiation unit balancer, the radiation unit balancer is arranged at At the bottom of the dielectric substrate, a feed circuit is provided on the radiation unit balancer, and the feed circuit communicates with the radiation unit balancer and the dielectric substrate; characterized in that: the front side of the dielectric substrate is provided with Half-wave vibrator, the half-wave vibrator is specifically a U-shaped end opening composed of radiating arms; a filter circuit is provided on the back of the dielectric substrate, and the microwave circuit includes coupling stubs of the radiating arm of the vibrator, suppressing high-frequency parasitic radiation stubs, and The coupling portion of the end of the vibrator radiation arm; the coupling stub of the vibrator radiation arm includes a low impedance line, the suppression high-frequency parasitic radiation stub includes a high impedance line,
  • the radiation arm includes a first radiation arm and a second radiation arm
  • the impedance line includes a first low impedance line and a second low impedance line
  • the high impedance line includes a first high impedance line and a second high impedance line.
  • the first low impedance line is connected to the first high impedance line, the first low impedance line and the first radiating arm are correspondingly coupled up and down, the first high impedance line and the vibrator radiate
  • the coupling part of the arm end is coupled;
  • the second low-impedance line is connected to the second high-impedance line, the second low-impedance line and the second radiating arm are correspondingly coupled up and down, and the second high-impedance line is connected to the The coupling part at the end of the radiating arm of the vibrator is coupled.
  • the dielectric substrate is specifically in the shape of a fan composed of a center plate and four blades
  • the radiation unit balancer is fixed on the back of the center plate
  • the front surface of the four blades is provided with the
  • the half-wave oscillator is provided with the filter circuit on the back of the four blades at the same time.
  • the first high-impedance line and the second high-impedance line are both U-shaped curved shapes.
  • a mechanical hole is opened in the middle part of the first radiating arm and the second radiating arm.
  • two sets of bowtie-shaped copper foils are provided on the back of the center plate, and metalized via holes are opened on the center plate, and the copper foil passes through the metalized via holes and the half-wave oscillator connection.
  • the shape of the end opening of the half-wave vibrator composed of radiating arms may also be E-shaped, circular or V-shaped.
  • the shape of the first high-impedance line and the second high-impedance line may also be parallel coupled lines or open-circuit stubs or short-circuit stubs.
  • the material process of the dielectric substrate is a PCB board or a plastic plating board
  • the process realized by the dielectric substrate is a sheet metal process or a die-casting process.
  • a microwave circuit composed of different impedance values is designed at the lower layer of the end of the open half-wave vibrator.
  • This device is connected with the half-wave vibrator of the upper opening through the circuit at both ends through coupling, which extends the radiation arm of the open half-wave vibrator. Broaden the bandwidth of the low-frequency radiation unit.
  • the high-resistance line and the low-resistance line are periodically connected to form an effective filter circuit, which can suppress the electromagnetic waves of the high-frequency radiating unit on the surface of the low-frequency radiating unit.
  • a mechanical hole is opened in the middle part of the first radiating arm and the second radiating arm, which can reduce the load of the vibrator on the dielectric substrate.
  • Two sets of bow tie-shaped copper foils are arranged on the back of the center board. This design can reduce the impact of low-frequency radiation on the performance of the high-frequency radiation unit, and further optimize the high-frequency radiation performance for converting the radiation bandwidth.
  • the radiation unit designed in this scheme designs microwave circuits composed of different impedance values under the open half-wave oscillator, which extends the radiation arm of the open half-wave oscillator and greatly broadens the bandwidth of the low-frequency radiation unit At the same time, it has the function of suppressing high-frequency parasitic radiation, fundamentally solving the problem of mutual coupling between high and low frequencies. It can ensure the radiation performance of the two under the close distance of the high and low frequency radiating unit, and can be used under a narrow radome section. Realize ultra-multi-frequency antennas, realize the high integration of ultra-multi-frequency antennas, greatly reduce the number of antennas, and reduce operators' network deployment and operating costs.
  • Figure 1 is a perspective view of the overall structure of the present invention.
  • Figure 2 is a top view of the overall structure of the present invention.
  • Figure 3 is a bottom view of the overall structure of the present invention.
  • an ultra-wideband low-frequency radiation unit with the function of suppressing high-frequency parasitic radiation including a dielectric substrate 1 and a radiation element balancer 2, which is arranged on the dielectric substrate 1.
  • the radiation unit balancer 2 is provided with a feeder circuit 3, and the feeder circuit 3 connects the radiation unit balancer 2 and the dielectric substrate 1.
  • the front side of the dielectric substrate 1 is provided with a half-wave oscillator 4 and a half-wave oscillator 4 Specifically, it is a U-shaped end opening composed of radiating arms; a microwave circuit is provided on the back of the dielectric substrate 1, and the microwave circuit includes coupling stubs of the vibrator radiating arm, suppression of high-frequency parasitic radiation stubs, and coupling part 9 of the end of the radiating arm of the vibrator;
  • the stubs include low-impedance lines, and the high-frequency parasitic radiation suppression stubs include high-impedance lines, low-impedance lines and high-impedance lines connected, low-impedance lines and radiating arms are coupled up and down correspondingly, and high-impedance lines are coupled to the end coupling part 9 of the vibrator radiating arm.
  • a microwave circuit composed of different impedance values is designed in the lower layer of the end of the open half-wave vibrator 4.
  • This device is connected with the half-wave vibrator 4 of the upper opening through the circuit at both ends through coupling, which extends the radiation of the open half-wave vibrator 4
  • the arm greatly broadens the bandwidth of the low-frequency radiation unit.
  • the high-resistance line and the low-resistance line are periodically connected to form an effective filter circuit, which can suppress the electromagnetic waves of the high-frequency radiation unit on the surface of the low-frequency radiation unit.
  • the circuit form of the suppression function is not limited to this, and it can be a coupling form, or a high and low impedance line can be an open circuit or a short circuit form.
  • the preferred implementation is as follows:
  • the radiating arm includes a first radiating arm 41 and a second radiating arm 42
  • the impedance line includes a first low impedance line 7 and a second low impedance line 8
  • the high impedance line includes a first high impedance line 5 and a second high impedance line 6
  • the first low-impedance line 7 is connected to the first high-impedance line 5, the first low-impedance line 7 and the first radiating arm 41 are correspondingly coupled up and down, and the first high-impedance line 5 is coupled to the coupling part 9 of the end of the radiating arm of the vibrator
  • the impedance 8 line is connected to the second high impedance line 6, the second low impedance line 8 and the second radiating arm 42 are correspondingly coupled up and down, and the second high impedance line 6 is coupled to the coupling part 9 of the vibrator radiating arm end.
  • This structure is a microwave circuit The refinement.
  • the dielectric substrate 1 is specifically in the shape of a fan composed of a center plate and four blades.
  • the radiation element balancer 2 is fixed on the back of the center plate, and half-wave vibrators 4 are provided on the front of the four blades.
  • the four sets of half-wave vibrators 4 are respectively arranged on the four blades of the dielectric substrate 1, and the back of the blades are provided
  • the microwave circuit corresponds to the half-wave vibrator 4. This structure is a better structure but not limited to this.
  • the number of blades can be increased, and the half-wave vibrator 4 and the microwave circuit can be increased accordingly.
  • Both the first high-impedance line 5 and the second high-impedance line 6 have U-shaped bends.
  • the U-shaped bend can allow the first high-impedance line 5 and the second high-impedance line 6 to have two parallel lines.
  • This U-shaped The curved structure is the optimal structure, but it is not limited to this.
  • the middle part of the first radiating arm 41 and the second radiating arm 42 is provided with a mechanical hole 10, and the mechanical hole 10 can reduce the load of the vibrator on the dielectric substrate 1.
  • Two sets of bowtie-shaped copper foils 11 are provided on the back of the center board, and metalized vias 12 are opened on the center board.
  • the copper foil 11 is connected to the half-wave oscillator 4 through the metalized vias 12; this design can reduce
  • the low-frequency radiation is affected by the performance of the high-frequency radiation unit, and the high-frequency radiation performance is further optimized to convert the bandwidth of the radiation.
  • the half-wave vibrator 4 has a U-shaped opening at the end of the radiating arm. This is the best way at present, but it is not limited to this form. Radiation branches can be added to the opening to form an E-shape, which can be a circular radiating arm opening or The V-shaped radiating arm is open at the end.
  • the first high-impedance line 5 and the second high-impedance line 6 for suppressing high-frequency parasitic radiation branches are U-shaped, which is currently the best shape, but it is not limited to this form. It can be multiple parallel coupled lines or open-circuit branches. Or short-circuit branches.
  • the material process realized by the radiating unit can be PCB, plastic plating, sheet metal, or die-casting.
  • microwave devices composed of different impedance values can be connected to the open half-wave oscillator 4 through coupling. Part of the radiating arm of the low-frequency radiating unit.
  • the radiation unit designed in this scheme designs microwave circuits composed of different impedance values under the open half-wave oscillator 4, which extends the radiation arm of the open half-wave oscillator 4 and greatly widens the low-frequency radiation unit It also has the function of suppressing high-frequency parasitic radiation and fundamentally solves the problem of mutual coupling between high and low frequencies. It can ensure the radiation performance of the two at a relatively close distance between the high and low frequency radiation units, and can be used in a narrow radome Realize the ultra-multi-frequency antenna under the cross-section, realize the high integration of the ultra-multi-frequency antenna, greatly reduce the number of antennas, and reduce the network deployment and operating costs of operators.

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Abstract

一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，包括介质基板，介质基板的正面设置有半波振子，半波振子具体为由辐射臂组成的U型末端开口；介质基板的背面设置有滤波电路，滤波电路包括振子辐射臂耦合枝节、抑制高频寄生辐射枝节以及振子辐射臂末端耦合部位；振子辐射臂耦合枝节包括低阻抗线，抑制高频寄生辐射枝节包括高阻抗线，低阻抗线和高阻抗线连接，低阻抗线和辐射臂上下对应耦合，高阻抗线和振子辐射臂末端耦合部位耦合；本方案设计的辐射单元在开口的半波振子下层设计由不同阻抗值组成的滤波电路，延长了开口半波振子的辐射臂，极大拓宽了低频辐射单元的带宽，同时具有抑制高频寄生辐射功能，从根本上解决高低频之间的互耦问题。

Description

一种具有抑制高频寄生辐射功能的超宽带低频辐射单元 技术领域
本发明属于辐射单元技术领域，具体涉及一种具有抑制高频寄生辐射功能的超宽带低频辐射单元。
背景技术
2019年6月6日，工信部向运营商颁发了5G牌照，这意味着我国正式进入5G商用阶段。但是为了实现通信系统的广覆盖，低成本运营，2G，3G和4G三个系统将长期存在，如此之多的制式和系统对基站天线提出了更加苛刻的集成化要求。实现以上要求目前有两种方案，一种是同轴嵌套方案，另外一种是Side By Side方案。前种方案由于碗装振子口径较大，很难充分利用天线的空间，而常规的Side By Side方案为了降低高频振子和低频振子之间的互耦不得不加大两种振子的间距，这样也浪费了天线宝贵的空间。
因此，基于Side By Side方案，本方案设计一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其本身具有抑制高频寄生辐射功能，可以保证在两种振子较近的间距下，两种频段的辐射性能影响较小，进而实现基站天线的高度集成化，进一步减少天线数量，降低建设和运营成本。
发明内容
为克服上述现有技术中的不足，本发明目的在于提供一种具有抑制高频寄生辐射功能的超宽带低频辐射单元。
为实现上述目的及其他相关目的，本发明提供的技术方案是：一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，包括介质基板和辐射单元平衡器，所述辐射单元平衡器设置在所述介质基板的底部，所述辐射单元平衡器上设置有馈电电路，所述馈电电路连通所述辐射单元平衡器和所述介质基板；其特征在于：所述介质基板的正面设置有半波振子，所述半波振子具体为由辐射臂组成的U型末端开口；所述介质基板的背面设置有滤波电路，所述微波电路包括振子辐射臂耦合枝节、抑制高频寄生辐射枝节以及振子辐射臂末端耦合部位；所述振子辐射臂耦合枝节包括低阻抗线，所述抑制高频寄生辐射枝节包括高阻抗线，所述低阻抗线和所述高阻抗线连接，所述低阻抗线和所述辐射臂上下对应耦合，所述高阻抗线和所述振子辐射臂末端耦合部位耦合。
优选的，所述辐射臂包括第一辐射臂和第二辐射臂，所述阻抗线包括第一低阻抗线和第二低阻抗线，所述高阻抗线包括第一高阻抗线和第二高阻抗线，所述第一低阻抗线和所 述第一高阻抗线连接，所述第一低阻抗线和所述第一辐射臂上下对应耦合，所述第一高阻抗线和所述振子辐射臂末端耦合部位耦合；所述第二低阻抗线和所述第二高阻抗线连接，所述第二低阻抗线和所述第二辐射臂上下对应耦合，所述第二高阻抗线和所述振子辐射臂末端耦合部位耦合。
优选的，所述介质基板具体为由一块中心板和四个叶片组成的风扇形状，所述辐射单元平衡器固定在所述中心板的背面，在四个所述叶片的正面都设置有所述半波振子，同时在四个所述叶片的背面都设置有所述滤波电路。
优选的，所述第一高阻抗线和所述第二高阻抗线都为U型弯曲形状。
优选的，所述第一辐射臂和第二辐射臂中间部分开设有机械孔。
优选的，所述中心板的背面设置有两组领结形状的铜箔，同时在所述中心板上开设有金属化过孔，所述铜箔通过所述金属化过孔和所述半波振子连接。
优选的，所述半波振子由辐射臂组成的末端开口形状还可以为E型或者圆形或者V型。
优选的，所述第一高阻抗线和所述第二高阻抗线的形状还可以为条平行耦合线或者开路枝节或者短路枝节。
优选的，所述介质基板的材质工艺为PCB板或者塑料电镀板，所述介质基板实现的工艺为钣金工艺或者压铸工艺。
针对上述方案的结构特征，解释如下：
本发明在开口的半波振子末端下层设计了由不同阻抗值组成的微波电路，此器件通过两端的电路与上层开口的半波振子通过耦合连接起来，延长了开口半波振子的辐射臂，极大拓宽了低频辐射单元的带宽。
当高频辐射单元在其下方辐射电磁波时，所述的高阻线与低阻线周期连接构成了一个有效的滤波电路，从而可以抑制高频辐射单元在低频辐射单元表面的电磁波。
在第一辐射臂和第二辐射臂中间部分开设机械孔，这样可以减轻振子对介质基板的负重。
在中心板的背面设置两组领结形状的铜箔，此种设计可以减小低频辐射面对高频辐射单元的性能影响，进一步优化了高频辐射性能，用于转换辐射的带宽。
本方明的有益效果为：本方案设计的辐射单元在开口的半波振子下层设计由不同阻抗值组成的微波电路，延长了开口半波振子的辐射臂，极大拓宽了低频辐射单元的带宽，同时具有抑制高频寄生辐射功能，从根本上解决高低频之间的互耦问题，可以在高低频辐射单 元较近的距离下保证两者的辐射性能，可以在较窄的天线罩截面下实现超多频天线，实现超多频天线的高度集成化，大大减少天线数量，降低运营商布网和运营成本。
附图说明
图1为本发明整体结构立体视图。
图2为本发明整体结构俯视图。
图3为本发明整体结构仰视图
以上附图中，介质基板1、辐射单元平衡器2、馈电电路3、半波振子4、第一高阻抗线5、第二高阻抗线6、第一低阻抗线7、第二低阻抗8、振子辐射臂末端耦合部位9、机械孔10、铜箔11、金属化过孔12、第一辐射臂41、第二辐射臂42。
具体实施方式
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
请参阅图1～图3。须知，本说明书所附图式所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容得能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语，亦仅为便于叙述的明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。
实施例：如图1～图3所示，一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，包括介质基板1和辐射单元平衡器2，辐射单元平衡器2设置在介质基板1的底部，辐射单元平衡器2上设置有馈电电路3，馈电电路3连通辐射单元平衡器2和介质基板1；其特征在于：介质基板1的正面设置有半波振子4，半波振子4具体为由辐射臂组成的U型末端开口；介质基板1的背面设置有微波电路，微波电路包括振子辐射臂耦合枝节、抑制高频寄生辐射枝节以及振子辐射臂末端耦合部位9；振子辐射臂耦合枝节包括低阻抗线，抑制高频寄生辐射枝节包括高阻抗线，低阻抗线和高阻抗线连接，低阻抗线和辐射臂上下对应耦合，高阻抗线和振子辐射臂末端耦合部位9耦合。
本发明在开口的半波振子4末端下层设计了由不同阻抗值组成的微波电路，此器件通过两端的电路与上层开口的半波振子4通过耦合连接起来，延长了开口半波振子4的辐射臂，极大拓宽了低频辐射单元的带宽。
当高频辐射单元在其下方辐射电磁波时，所述的高阻线与低阻线周期连接构成了一个有效的滤波电路，从而可以抑制高频辐射单元在低频辐射单元表面的电磁波,此种带抑制功能的电路形式不限于此，可以为耦合形式，也可以为高低阻抗线可为开路或者短路形式优选实施方式如下：
辐射臂包括第一辐射臂41和第二辐射臂42，阻抗线包括第一低阻抗线7和第二低阻抗8线，高阻抗线包括第一高阻抗线5和第二高阻抗线6，第一低阻抗线7和第一高阻抗线5连接，第一低阻抗线7和第一辐射臂41上下对应耦合，第一高阻抗线5和振子辐射臂末端耦合部位9耦合；第二低阻抗8线和第二高阻抗线6连接，第二低阻抗8线和第二辐射臂42上下对应耦合，第二高阻抗线6和振子辐射臂末端耦合部位9耦合，此种结构为微波电路的细化。
介质基板1具体为由一块中心板和四个叶片组成的风扇形状，辐射单元平衡器2固定在中心板的背面，在四个叶片的正面都设置有半波振子4，同时在四个叶片的背面都设置有微波电路；本实施例使用的辐射单元，一共设置四组结构相同的半波振子4，四组半波振子4分别设置在介质基板1的四个叶片上，同时叶片的背面设置微波电路和半波振子4相对应，此种结构为较优结构但不仅限与此，可以增加叶片的数量，同时相应的增加半波振子4和微波电路。
第一高阻抗线5和第二高阻抗线6都为U型弯曲形状，U型弯曲可以第一高阻抗线5和第二高阻抗线6都有两条互相平行的线路，此种U型弯曲结构为最优结构，但是不仅限于此。
第一辐射臂41和第二辐射臂42中间部分开设有机械孔10，机械孔10可以减轻振子对介质基板1的负重。
中心板的背面设置有两组领结形状的铜箔11，同时在中心板上开设有金属化过孔12，铜箔11通过金属化过孔12和半波振子4连接；此种设计可以减小低频辐射面对高频辐射单元的性能影响，进一步优化了高频辐射性能，用于转换辐射的带宽。
半波振子4为辐射臂末端开口的形状为U型是目前此最优的方式，但不限于此形式，可以在开口位置添加辐射枝节形成E字形状，可以为圆形辐射臂开口，也可以为V字形的辐射臂在末端开口。
抑制高频寄生辐射枝节的第一高阻抗线5和第二高阻抗线6形状为U型，目前为最优形状，但不限于此形式，可以为多条平行耦合线，也可以为开路枝节或短路枝节。
辐射单元实现的材质工艺可以为PCB，塑料电镀，钣金，或者压铸，其中采用钣金 或者压铸工艺时，可以将不同阻抗值组成的微波器件通过耦合形式与开口的半波振子4连接，作为低频辐射单元辐射臂的一部分。
本实施例的有益效果为：本方案设计的辐射单元在开口的半波振子4下层设计由不同阻抗值组成的微波电路，延长了开口半波振子4的辐射臂，极大拓宽了低频辐射单元的带宽，同时具有抑制高频寄生辐射功能，从根本上解决高低频之间的互耦问题，可以在高低频辐射单元较近的距离下保证两者的辐射性能，可以在较窄的天线罩截面下实现超多频天线，实现超多频天线的高度集成化，大大减少天线数量，降低运营商布网和运营成本。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。

Claims (9)

  1. 一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，包括介质基板和辐射单元平衡器，所述辐射单元平衡器设置在所述介质基板的底部，所述辐射单元平衡器上设置有馈电电路，所述馈电电路连通所述辐射单元平衡器和所述介质基板；其特征在于：所述介质基板的正面设置有半波振子，所述半波振子具体为由辐射臂组成的U型末端开口；所述介质基板的背面设置有滤波电路，所述滤波电路包括振子辐射臂耦合枝节、抑制高频寄生辐射枝节以及振子辐射臂末端耦合部位；所述振子辐射臂耦合枝节包括低阻抗线，所述抑制高频寄生辐射枝节包括高阻抗线，所述低阻抗线和所述高阻抗线连接，所述低阻抗线和所述辐射臂上下对应耦合，所述高阻抗线和所述振子辐射臂末端耦合部位耦合。
  2. 根据权利要求1所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述辐射臂包括第一辐射臂和第二辐射臂，所述阻抗线包括第一低阻抗线和第二低阻抗线，所述高阻抗线包括第一高阻抗线和第二高阻抗线，所述第一低阻抗线和所述第一高阻抗线连接，所述第一低阻抗线和所述第一辐射臂上下对应耦合，所述第一高阻抗线和所述振子辐射臂末端耦合部位耦合；所述第二低阻抗线和所述第二高阻抗线连接，所述第二低阻抗线和所述第二辐射臂上下对应耦合，所述第二高阻抗线和所述振子辐射臂末端耦合部位耦合。
  3. 根据权利要求1所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述介质基板具体为由一块中心板和四个叶片组成的风扇形状，所述辐射单元平衡器固定在所述中心板的背面，在四个所述叶片的正面都设置有所述半波振子，同时在四个所述叶片的背面都设置有所述滤波电路。
  4. 根据权利要求2所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述第一高阻抗线和所述第二高阻抗线都为U型弯曲形状。
  5. 根据权利要求2所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述第一辐射臂和所述第二辐射臂中间部分开设有机械孔。
  6. 根据权利要求3所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述中心板的背面设置有两组领结形状的铜箔，同时在所述中心板上开设有金属化过孔，所述铜箔通过所述金属化过孔和所述半波振子连接。
  7. 根据权利要求1所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述半波振子由辐射臂组成的末端开口形状还可以为E型或者圆形或者V型。
  8. 根据权利要求4所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述第一高阻抗线和所述第二高阻抗线的形状还可以为条平行耦合线或者开路枝节或 者短路枝节。
  9. 根据权利要求1所述的一种具有抑制高频寄生辐射功能的超宽带低频辐射单元，其特征在于：所述介质基板的材质工艺为PCB板或者塑料电镀板，所述介质基板实现的工艺为钣金工艺或者压铸工艺。
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