阅读说明：本技术 一种可提高增益及前后比的低剖面辐射单元 (Low-profile radiation unit capable of improving gain and front-to-back ratio ) 是由 陈后生 庄昆 朱恺贤 赵亮 唐华 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种可提高增益及前后比的低剖面辐射单元,包括偶极子、耦合PCB接地板、辐射臂和偶极子巴伦,所述偶极子设置有四个,四个所述偶极子每两两组合呈圆周分布于耦合PCB接地板顶部且与耦合PCB接地板顶部固定连接,每个所述偶极子上皆安装有偶极子巴伦,每相邻两组偶极子巴伦之间安装有辐射臂。该可提高增益及前后比的低剖面辐射单元,将偶极子巴伦设计为向下折弯,满足辐射单元电长度要求,同时降低了辐射单元高度,并在偶极子巴伦与辐射臂相连处增加面积,以满足偶极子巴伦与辐射臂电耦合要求,将相连处进行缝隙开槽设计,提高辐射单元对地辐射高度,达到辐射单元性能要求。(The invention discloses a low-profile radiating unit capable of improving gain and front-to-back ratio, which comprises four dipoles, a coupling PCB (printed circuit board), radiating arms and dipole baluns, wherein every two of the four dipoles are combined and circumferentially distributed on the top of the coupling PCB and fixedly connected with the top of the coupling PCB, each dipole is provided with the dipole balun, and the radiating arms are arranged between every two adjacent groups of the dipole baluns. According to the low-profile radiating element capable of improving the gain and the front-to-back ratio, the dipole balun is designed to be bent downwards, the requirement on the electrical length of the radiating element is met, the height of the radiating element is reduced, the area of the joint of the dipole balun and the radiating arm is increased so as to meet the requirement on the electrical coupling of the dipole balun and the radiating arm, the joint is subjected to gap slotting design, the radiating height of the radiating element to the ground is improved, and the performance requirement of the radiating element is met.)

1. A low profile radiating element with improved gain and front-to-back ratio, comprising: the novel dipole antenna comprises four dipoles (1), a coupling PCB (printed circuit board) grounding plate (2), radiation arms (3) and dipole baluns (4), wherein the four dipoles (1) are combined in pairs and are circumferentially distributed on the top of the coupling PCB grounding plate (2) and fixedly connected with the top of the coupling PCB grounding plate (2), each dipole (1) is provided with the dipole balun (4), and the radiation arms (3) are arranged between every two adjacent groups of dipole baluns (4).

2. A low-profile radiating element with improved gain and front-to-back ratio as defined in claim 1, wherein: the radiation arm (3) is electrically coupled with the two groups of dipole baluns (4).

3. A low-profile radiating element with improved gain and front-to-back ratio as claimed in claim 2, wherein: the shape of the radiation arm (3) is inverted U-shaped.

4. A low-profile radiating element with improved gain and front-to-back ratio as claimed in claim 3, wherein: the bottom of the dipole balun (4) is provided with a bending part, a feed cable welding block (5) is fixed at the bending part, and the feed cable welding block (5) is formed by bending a metal plate.

5. The low-profile radiating element with improved gain and front-to-back ratio as claimed in claim 4, wherein: and every two adjacent groups of dipoles (1) are fixedly connected at the middle position of the dipole balun (4) through a coupling balance block (6).

6. The low-profile radiating element with improved gain and front-to-back ratio as claimed in claim 4, wherein: the top of each dipole balun (4) extends outwards to form a coupling surface, and the coupling surfaces are distributed away from the axis of the coupling PCB ground plate (2).

Technical Field

The invention relates to the technical field of communication equipment, in particular to a low-profile radiating unit capable of improving gain and front-to-back ratio.

Background

With the development of communication technology, the requirements of a communication system on an antenna are higher and higher, and the overall performance of the antenna is determined by the quality of a radiation unit; meanwhile, in order to meet the requirement that a plurality of operators build a common base station iron tower together, the operators provide new requirements for the size and the weight of the antenna, so that a small-size high-performance radiating unit is designed, and the practical significance is very important.

According to the microwave principle, the size of an antenna radiation unit is larger in LTE700, CDMA800 and GSM900 frequency bands, so that the whole size of the antenna is larger under the condition of meeting the performance requirement of a communication system; at present, operators adopt a mode of co-building a common base station, one base station has a plurality of systems working simultaneously, under the condition that the front-to-back ratio of the existing antenna is not very high, the systems interfere with each other to cause the deterioration of communication signals, and under the condition, the improvement of the front-to-back ratio of the antenna becomes increasingly important.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the low-profile radiating element capable of improving the gain and the front-to-back ratio, the dipole balun is designed to be bent downwards, the requirement on the electrical length of the radiating element is met, the height of the radiating element is reduced, the area of the joint of the dipole balun and the radiating arm is increased so as to meet the requirement on the electrical coupling of the dipole balun and the radiating arm, the joint is subjected to gap slotting design, the radiating height of the radiating element to the ground is improved, the performance requirement of the radiating element is met, and the like, and the problems in the background art are solved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the four dipoles are combined in pairs and are circumferentially distributed on the top of the coupling PCB ground plate and fixedly connected with the top of the coupling PCB ground plate, each dipole is provided with the dipole balun, and the radiation arm is arranged between every two adjacent groups of dipole baluns.

Preferably, the radiation arm is electrically coupled with the two groups of dipole baluns.

Preferably, the radiation arm is in an inverted U shape, so that electromagnetic wave paths can be increased, and the electrical performance requirement can be met.

Preferably, the dipole balun bottom is provided with the department of bending, and the department of bending is fixed with feed cable welded block, feed cable welded block is bent by the panel beating and is formed, and this kind of setting has ensured the stability of feed cable welded block when using, lifting means's life.

Preferably, every two adjacent groups of dipoles are fixedly connected at the middle position of the dipole balun through a coupling balance block, the coupling balance block increases S parameter bandwidth of the radiation unit, and meanwhile radiation structure strength is enhanced.

Preferably, a coupling surface extends outwards from the top of each dipole balun, and the coupling surfaces are distributed away from the axis of the grounding plate of the coupling PCB.

(III) advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

1. the coupling PCB grounding plate is different from other oscillator direct current grounding forms so as to improve the integral PIM magnitude of the antenna.

2. The invention designs the radiation arm into an inverted U-shaped radiation arm to increase the electromagnetic wave path, thereby meeting the electrical property requirement.

3. According to the invention, the dipole balun is designed to be bent downwards, the requirement on the electrical length of the radiation unit is met, the height of the radiation unit is reduced, the area of the joint of the dipole balun and the radiation arm is increased to meet the requirement on the electrical coupling of the dipole balun and the radiation arm, the joint is subjected to gap slotting design, the ground radiation height of the radiation unit is increased, and the performance requirement of the radiation unit is met.

4. The invention utilizes the coupling balance block to connect two adjacent dipoles at the middle position of the dipole balun, and the coupling balance block increases the S parameter bandwidth of the radiation unit, enhances the radiation structure strength and ensures the stability of the whole equipment.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention;

fig. 3 is a schematic bottom view of the present invention.

In the figure: 1. a dipole; 2. coupling a PCB ground plate; 3. a radiation arm; 4. a dipole balun; 5. a feed cable welding block; 6. a coupling balance weight.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-3, the low-profile radiating element capable of improving gain and front-to-back ratio comprises four dipoles 1, a coupling PCB ground plate 2, radiating arms 3 and dipole baluns 4, wherein the four dipoles 1 are arranged, each two of the four dipoles 1 are combined and distributed on the top of the coupling PCB ground plate 2 in a circumferential manner and fixedly connected with the top of the coupling PCB ground plate 2, the dipoles 1 and the coupling PCB ground plate 2 can be connected in a rivet riveting manner, each dipole balun 4 is arranged on each dipole 1, the radiating arms 3 are arranged between every two adjacent groups of dipole baluns 4, and the radiating arms 3 and the two groups of dipole baluns 4 are connected in an electric coupling manner. In order to meet the wavelength requirements of the radiating arm 3 in the designed frequency band. The area of the connection part of the dipole balun 4 and the radiation arm 3 is increased so as to meet the requirement of electric coupling between the dipole balun 4 and the radiation arm 3, and the connection part is subjected to gap slotting design, so that the ground radiation height of the radiation unit is improved, and the performance requirement of the radiation unit is met. The radiating arm 3 is shaped as an inverted "U" to increase the electromagnetic wave path to meet electrical performance requirements. Because the bandwidth of the radiating element is relatively wide, in order to meet the bandwidth requirement, the top of each dipole balun 4 extends outwards to form a coupling surface, and the coupling surfaces are distributed at the positions far away from the axis of the coupling PCB grounding plate 2.

In order to meet the requirement of a low section of a radiation unit, the dipole balun 4 is designed to be bent downwards, the requirement of the electrical length of the radiation unit is met, the height of the radiation unit is reduced, a bent part is arranged at the bottom of the dipole balun 4, a feed cable welding block 5 is fixed at the bent part, the feed cable welding block 5 is formed by bending a metal plate, and the arrangement can ensure the stability of the feed cable welding block 5 and is not easy to damage.

Every two adjacent groups of dipoles 1 are fixedly connected at the middle position of the dipole balun 4 through a coupling balance block 6, the connection mode can adopt welding or coupling riveting, the coupling balance block 6 increases the S parameter bandwidth of the radiation unit, and meanwhile, the radiation structure strength is also enhanced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.