CN111668591A - A low-profile plastic vibrator and 5G base station antenna - Google Patents

Abstract

The invention discloses a low-profile plastic vibrator and a 5G base station antenna. The low-profile plastic vibrator comprises an integrally formed base plate, a support frame and a base plate, the support frame connects the base plate and the base plate, and a square metal radiator is arranged on the top surface of the base plate. The connecting frame is provided with a coupled feed line and a first conductor, and the bottom surface of the base plate is provided with a second conductor that conducts with the metal radiator through the first conductor; the center of the metal radiator is provided with a cross slot, which connects the The metal radiator is evenly divided into four rectangular sheets, each rectangular sheet is respectively provided with a rectangular window, and the four corners of the metal radiator are respectively provided with first slits; one end of the first slit is connected to the corner of the adjacent rectangular window. The other end is connected to the tip of the corner of the metal radiator; each end of the cross groove is respectively connected with a second slot, and the second slot is arranged parallel to the side of the metal radiator that it approaches. Low height, light weight, high integration and excellent electrical performance, suitable for 5G communication.

Description

A low-profile plastic vibrator and 5G base station antenna

technical field

The present invention relates to the technical field of antennas, and in particular, to a low-profile plastic vibrator and a 5G base station antenna.

Background technique

The large-scale application and promotion of 5G has brought a huge market demand to the 5G base station antenna industry. Compared with traditional 2G~4G base station antennas, 5G base station antennas use large-scale array antennas to implement Massive MIMO technology and beamforming technology, thereby greatly increasing the communication rate. However, the increase in the size of the 5G base station antenna array also greatly increases the size, weight and cost of the antenna array. How to effectively reduce the volume, weight and cost of the base station antenna array is a key issue that must be considered in the base station antenna design.

In order to effectively reduce the volume of the antenna array, the height of the vibrator of the base station antenna is also reduced from the traditional one-quarter wavelength to about one-tenth, which brings great challenges to the design of the base station antenna. In order to reduce the height of the base station antenna vibrator, at present, the solution of reducing the height of the dipole antenna vibrator and adopting the patch antenna is mainly adopted. Document 1 (R Wu, QXChu. Base-Station Antennas in Wireless Communications: A Low-Profile-Loop, Resonator-Loaded Broadband Antenna. IEEE ANTENNAS & PROPAGATION MAGAZINE, pp. 127-137, 2019.) proposes a resonant structure to The method of reducing the antenna element, however, its height can only be reduced to one-fifth of the wavelength of the antenna, and the performance of the antenna is degraded. The patch antenna has the problems of narrow bandwidth and low gain; Literature 2 (XJ Yang, L Ge, JP Wang, and C.Y.D.Sim.A Differentially Driven Dual-Polarized High-Gain Stacked Patch Antenna.IEEE Antennas and WirelessPropagation Letters, vol.17, no.7, PP.1181-1185, 2018.) proposed a multi-layer patch antenna scheme using differential feeding to improve the bandwidth and gain of the patch antenna scheme. The disadvantage of this solution is that it has high requirements on the process and high processing cost, which is not conducive to large-scale industrial production.

In order to effectively reduce the weight and cost of the antenna, the traditional die-cast metal vibrator is no longer applicable. The material forms of the 5G base station antenna are mainly in the form of PCB and plastic vibrators. PCB vibrators are currently the mainstream form of base station antennas, while plastic vibrators may become an alternative to PCB vibrators. Compared with PCB vibrators, plastic vibrators have the advantages of low cost, high integration and high product yield. In Document 3 (Chinese invention patent CN208460951U), Fei Rongda applied for an integrated plastic antenna vibrator solution. However, this solution does not involve the specific design of the base station antenna element, nor does it involve whether it can meet the size and performance requirements of the base station antenna.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a low-profile plastic vibrator and a 5G base station antenna with excellent electrical properties.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: a low-profile plastic vibrator, comprising a bottom plate, a support frame and a base plate that are integrally formed, the support frame connects the base plate and the bottom plate, and the top surface of the base plate is provided with a square metal radiation The connecting frame is provided with a coupled feeder line and a first conductor, and the bottom surface of the bottom plate is provided with a second conductor that conducts with the metal radiator through the first conductor;

The center of the metal radiator is provided with a cross slot, the cross slot divides the metal radiator into four rectangular pieces, and each rectangular piece is respectively provided with a rectangular window, and the four The corners are respectively provided with first slits;

One end of the first slot is connected to the corner of the rectangular window that it is close to, and the other end of the first slot is connected to the tip of the corner of the metal radiator;

Each end of the cross groove is respectively connected with a second slot, and the second slot is arranged parallel to the side of the metal radiator to which it is close.

In order to solve the above technical problem, the present invention also adopts the following technical solution: a 5G base station antenna includes the above-mentioned low-profile plastic vibrator.

The beneficial effects of the invention are: the low-profile plastic vibrator has the advantages of low height, light weight and high integration, and more importantly, the low-profile plastic vibrator has excellent electrical properties such as standing wave, isolation and cross-polarization ratio, It is especially suitable for macro base stations and small base stations in the 5G sub-6GHz frequency band. In the low-profile plastic vibrator, the base plate, the support frame and the base plate are integrally formed, which is easy to process, has high production efficiency, low manufacturing cost and good product batch consistency.

Description of drawings

FIG. 1 is a schematic structural diagram of the overall structure of the low-profile plastic vibrator according to the first embodiment of the present invention;

FIG. 2 is a top view of the substrate in the low-profile plastic vibrator according to the first embodiment of the present invention;

3 is a schematic structural diagram of a support frame in the low-profile plastic vibrator according to Embodiment 1 of the present invention;

4 is a front view of the support frame in the low-profile plastic vibrator according to the first embodiment of the present invention;

5 is a rear view of the support frame in the low-profile plastic vibrator according to the first embodiment of the present invention;

6 is a top view of a partial area of the bottom plate of the low-profile plastic vibrator according to the first embodiment of the present invention.

Label description:

1. Bottom plate; 2. Support frame; 3. Base plate; 4. Metal radiator; 5. Feeder wiring; 6. First conductor; 7. Second conductor; 8. Cross slot; 9. Rectangular sheet; 10. Rectangular window; 11, first slot; 12, second slot; 13, third slot; 14, support plate; 15, foot part; 16, feeding area; 17, connecting part; 18, window opening; 19, penetration mouth;

D. The distance from the second slot to the side of the metal radiator it is close to;

H. The distance from the second slit to the adjacent rectangular window.

Detailed ways

In order to describe in detail the technical content, achieved objects and effects of the present invention, the following descriptions are given with reference to the embodiments and the accompanying drawings.

Please refer to FIGS. 1 to 6 , a low-profile plastic vibrator includes a bottom plate 1 , a support frame 2 and a base plate 3 that are integrally formed. The support frame 2 connects the base plate 3 and the base plate 1 , and the top surface of the base plate 3 is provided with a square metal The radiator 4 is provided with a coupled feeder line 5 and a first conductor 6 on the connection frame, and the bottom surface of the bottom plate 1 is provided with a second conductor 7 that conducts with the metal radiator 4 through the first conductor 6 ;

The center of the metal radiator 4 is provided with a cross slot 8, and the cross slot 8 divides the metal radiator 4 into four rectangular pieces 9, and each of the rectangular pieces 9 is respectively provided with a rectangular window 10, The four corners of the metal radiator 4 are respectively provided with first slits 11;

One end of the first slit 11 is connected to the corner of the rectangular window 10 adjacent to it, and the other end is connected to the tip of the corner of the metal radiator 4;

Each end of the cross slot 8 is respectively connected with a second slot 12 , and the second slot 12 is arranged parallel to the side of the metal radiator 4 which is close to it.

The beneficial effects of the present invention are: the low-profile plastic vibrator has the advantages of low height, light weight and high integration, and more importantly, in the simulation results of the low-profile plastic vibrator, electrical voltages such as standing wave, isolation and cross-polarization ratio are Excellent performance, especially suitable for macro base stations and small base stations in the 5G sub-6GHz frequency band. In the low-profile plastic vibrator, the base plate 3, the support frame 2 and the base plate 1 are integrally formed, which is easy to process, has high production efficiency, low manufacturing cost and good product batch consistency.

Further, the cross groove 8 includes two vertically intersecting third slits 13 , and each of the third slits 13 is connected to a group of two parallel second slits 12 .

Further, the connection between the third slit 13 and the second slit 12 is located at the midpoint of the second slit 12 .

As can be seen from the above description, the cross groove 8 is easy to set.

Further, the distance from the second slit 12 to the side of the metal radiator 4 to which it approaches is smaller than the distance from the second slit 12 to the rectangular window 10 to which it approaches.

It can be seen from the above description that the structure has the advantages of wider bandwidth and better cross-polarization ratio.

Further, the top surface of the base plate 1 is provided with a feeding network electrically connected to the feeding wiring 5 .

It can be seen from the above description that setting the feeding network on the top surface of the base plate 1 can make the low-profile plastic vibrator more integrated.

Further, the support frame 2 is in the shape of a cross, and the support frame 2 includes two support plates 14 that intersect vertically. The other side of the support plate 14 is respectively provided with the first conductors 6 , the bottom end of each of the first conductors 6 has two legs 15 arranged at intervals, and the first conductors 6 pass through the legs 15 connects the second conductor 7 .

It can be seen from the above description that the middle of the bottom of the first conductor 6 on the support plate 14 is separated by a gap of a certain width to form two legs 15 and are connected with the second conductor 7 of the base plate 1 through the legs 15, thereby forming the antenna's bar. Lomb structure, antenna impedance matching and isolation between polarizations.

Further, the rectangular sheet 9 is provided with a feeding area 16 , the substrate 3 has an opening corresponding to the feeding area 16 , and the first conductor 6 conducts the first conductor 6 through the opening. Rectangular piece 9.

It can be seen from the above description that the four feeding areas 16 in the middle of the metal radiator 4 are connected to the first conductor 6 layer, so as to conduct electromagnetic waves from the feeding wire 5 to the metal radiator 4 and then radiate out. Optionally, the feeding area 16 is in the shape of a rectangular slot.

Further, at least one of the support plates 14 is provided with a window 18 through which the feed wires 5 on the other support plate 14 pass.

It can be seen from the above description that the arrangement of the opening window 18 is convenient for the processing of the feeding wire 5 .

Further, the bottom plate 1 is provided with a through opening 19 for the first conductor 6 to pass through and/or for the bottom plate 1 , the support frame 2 and the base plate 3 to be integrally formed.

It can be seen from the above description that the functions of the through hole 19 are: (1) used to allow the first conductor 6 to pass through so that it can be connected to the second conductor 7; (2) when the bottom plate 1, the base plate 3 and the support frame 2 are injection-molded When integrally formed, the through-hole 19 can facilitate injection molding.

5G base station antenna, including the above-mentioned low-profile plastic vibrator.

It can be seen from the above description that the 5G base station antenna has at least all the beneficial effects of the above-mentioned low-profile plastic vibrator.

Example 1

Please refer to FIG. 1 to FIG. 6 , the first embodiment of the present invention is: a 5G base station antenna, including a low-profile plastic vibrator, please refer to FIG. 1 to FIG. 3 , the low-profile plastic vibrator includes an integrally formed bottom plate 1 and a support frame 2 and the base plate 3, the support frame 2 connects the base plate 3 and the bottom plate 1, the top surface of the base plate 3 is provided with a square metal radiator 4, and the connection frame is provided with a coupled feeder line 5 and a first conductor 6, the said The bottom surface of the bottom plate 1 is provided with a second conductor 7 that conducts with the metal radiator 4 through the first conductor 6; the center of the metal radiator 4 is provided with a cross slot 8, which radiates the metal The body 4 is equally divided into four rectangular sheets 9, each of the rectangular sheets 9 is respectively provided with a rectangular window 10, and the four corners of the metal radiator 4 are respectively provided with first slits 11; the first slits One end of 11 is connected to the corner of the rectangular window 10 it is close to, and the other end is connected to the tip of the corner of the metal radiator 4; The second slot 12 is arranged parallel to the side of the metal radiator 4 that it is close to. In this embodiment, the four rectangular windows 10 are arranged in a 2×2 array, and the first and second conductors are respectively in a plate shape or a sheet shape.

The bottom plate 1 , the support frame 2 and the base plate 3 may be integrally formed by 3D printing or integrally formed by an injection molding process. The bottom plate 1 , the support frame 2 and the base plate 3 made of plastic have stable dielectric constant and low dielectric loss tangent angle.

As shown in FIG. 2 , specifically, the cross groove 8 includes two third slits 13 that intersect vertically, and each of the third slits 13 is connected to a group of two parallel second slits 12 , so The connection between the third slit 13 and the second slit 12 is located at the midpoint of the second slit 12 . Visually speaking, the two second slits 12 connecting the same third slit 13 and the third slit 13 form an I-shaped structure. Preferably, the intersection point of the two third slits 13 is the center point of the metal radiator 4; the lengths and widths of the two third slits 13 are the same; Equal length and same width.

The distance D from the second slit 12 to the side of the metal radiator 4 to which it approaches is smaller than the distance H from the second slit 12 to the rectangular window 10 to which it approaches. The structure has the advantages of wide bandwidth and excellent cross-polarization ratio.

Please refer to FIG. 3 and FIG. 4 , in order to improve the integration of the low-profile plastic vibrator, the top surface of the base plate 1 is provided with a feeding network (not shown) electrically connected to the feeding wiring 5 . In order to extend the feeding wire 5, the feeding wire 5 provided on the support frame 2 may have several bending parts, and the specific number of the bending parts can be set according to the actual situation. It is easy to understand that the feeding trace 5 is formed by connecting rectangular metal bodies of different widths. By reasonably setting the width and length of each metal body, the impedance matching of the circuit and the effective feeding of the plastic vibrator can be completed, which improves the performance of plastics. The standing wave of the vibrator reduces the height of the plastic vibrator.

Please refer to FIG. 3 to FIG. 5 , in detail, the support frame 2 is in the shape of a cross, and the support frame 2 includes two support plates 14 that intersect vertically, and one side of the two support plates 14 is respectively provided with the For the feeding line 5, the first conductors 6 are respectively provided on the other sides of the two supporting plates 14, and the bottom end of each of the first conductors 6 has two feet 15 arranged at intervals. A conductor 6 is connected to the second conductor 7 through the foot portion 15 . It should be understood that the first conductors 6 on each support plate 14 are respectively in a one-to-one correspondence with the two rectangular sheets 9 located at diagonally opposite corners. As shown in FIG. 2 , in more detail, the rectangular sheet 9 is provided with a feeding area 16 , and the substrate 3 has openings (not shown) corresponding to the feeding area 16 . A conductor 6 conducts the rectangular sheet 9 through the opening. In this embodiment, the feeding area 16 is in the shape of a rectangular slot, and the rectangular slot and the first slot 11 are arranged in line. In order to allow enough space on the rectangular sheet 9 to set the feeding area 16 and improve the electrical performance of the low-profile plastic vibrator, the corners of the rectangular window 10 near the center of the cross slot 8 are provided with a triangular shape. the connecting part 17, the connecting part 17 connects the two adjacent sides of the rectangular window 10, in other words, the connecting part 17 fills the area of the rectangular window 10 close to the cross slot 8 corner of the center. It is not difficult to understand that the connecting portion 17 can be reserved when the metal radiator 4 is processing the rectangular window 10 .

As shown in FIG. 3 and FIG. 4 , in order to facilitate the setting of the feeder wires 5 , at least one of the support plates 14 is provided with an opening for the feeder wires 5 on the other support plate 14 to pass through. window 18. In this embodiment, the two support plates 14 are respectively provided with windows 18 through which the feeder wires 5 pass.

Please refer to FIG. 1 and FIG. 6 , further, the bottom plate 1 is provided with a through hole 19 for the first conductor 6 to penetrate and/or for the bottom plate 1 , the support frame 2 and the base plate 3 to be integrally formed. In this embodiment, the bottom plate 1 is provided with a rectangular through opening 19 and two triangular through openings 19, and the sizes of the two triangular through openings 19 are different, wherein the rectangular through opening 19 is used for For the first conductor 6 to pass through, so that the first conductor 6 can be connected with the second conductor 7 on the bottom surface of the bottom plate 1; the triangular through hole 19 is divided into two types according to the size, and the smaller one is It is specially used to facilitate the implementation of the injection molding process, and the larger size not only plays a role for the first conductor 6 to pass through, but also plays a role of facilitating the implementation of the injection molding process.

To sum up, the low-profile plastic vibrator and 5G base station antenna provided by the present invention have the advantages of low height, light weight and high integration, and more importantly, the standing wave, isolation and cross-polarization of the low-profile plastic vibrator It has excellent isoelectric performance and is especially suitable for macro base stations and small base stations in the 5G sub-6GHz frequency band. In the low-profile plastic vibrator, the base plate, the support frame and the base plate are integrally formed, which is easy to process, has high production efficiency, low manufacturing cost and good product batch consistency.

The above descriptions are only examples of the present invention, and are not intended to limit the scope of the present invention. Any equivalent transformations made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in related technical fields, are similarly included in the within the scope of patent protection of the present invention.

Claims (10)

1. a low-profile plastic vibrator is characterized in that: comprise integrally formed base plate, support frame and base plate, support frame connects base plate and base plate, the top surface of base plate is provided with a square metal radiator, and the connection frame is provided with a phase the coupled feed line and the first conductor, the bottom surface of the base plate is provided with a second conductor that conducts with the metal radiator through the first conductor; The center of the metal radiator is provided with a cross slot, the cross slot divides the metal radiator into four rectangular pieces, and each rectangular piece is respectively provided with a rectangular window, and the four The corners are respectively provided with first slits; One end of the first slot is connected to the corner of the rectangular window that it is close to, and the other end of the first slot is connected to the tip of the corner of the metal radiator; Each end of the cross groove is respectively connected with a second slot, and the second slot is arranged parallel to the side of the metal radiator to which it is close. 2 . The low-profile plastic vibrator according to claim 1 , wherein the cross groove comprises two third slits intersecting vertically, and each of the third slits connects a group of two parallel slits. 3 . second gap. 3 . The low-profile plastic vibrator according to claim 2 , wherein the connection between the third slot and the second slot is located at the midpoint of the second slot. 4 . 4 . The low-profile plastic vibrator according to claim 1 , wherein the distance from the second slit to the side of the metal radiator to which it approaches is smaller than the distance from the second slit to the side of the metal radiator to which it approaches. 5 . The distance of the rectangular window. 5 . The low-profile plastic vibrator according to claim 1 , wherein the top surface of the bottom plate is provided with a feeding network electrically connected to the feeding wiring. 6 . 6 . The low-profile plastic vibrator according to claim 1 , wherein the support frame is in the shape of a cross, and the support frame comprises two support plates intersecting vertically, and one side of the two support plates is respectively provided with 6 . There are the feed lines, the other sides of the two support plates are respectively provided with the first conductors, and the bottom end of each of the first conductors has two legs spaced apart. The second conductor is connected through the foot. 7 . The low-profile plastic vibrator according to claim 6 , wherein the rectangular sheet is provided with a feeding area, the substrate has openings corresponding to the feeding area, and the first conductor The rectangular sheet is conducted through the opening. 8 . The low-profile plastic vibrator according to claim 6 , wherein at least one of the support plates is provided with a window through which the feed lines on the other support plate pass. 9 . 9 . The low-profile plastic vibrator according to claim 1 , wherein the bottom plate is provided with a through hole for the first conductor to pass through and/or for integral molding of the bottom plate, the support frame and the base plate. 10 . The 10.5G base station antenna is characterized by comprising the low-profile plastic vibrator according to any one of claims 1-9.

Images