Plastic vibrator unit and antenna

Abstract

The present invention provides a plastic vibrator unit and an antenna, which relates to the technical field of antenna components. In order to solve the technical problems in the prior art that the vibrator has high cost, inconvenient installation, and cannot meet the 5G frequency band, the technical solution of the present invention is as follows: comprising: a plastic substrate and a plastic vibrator, the plastic substrate and the plastic vibrator are integrally formed by plastic processing, a plurality of plastic vibrators are evenly distributed on the plastic substrate in an array, a first copper microstrip circuit is arranged on the upper surface of each plastic vibrator, and the first copper microstrip circuit forms a first rectangular window with four continuous sides; a second copper microstrip circuit is arranged on the lower surface of each plastic vibrator, and the second copper microstrip circuit forms a second rectangular window with four segmented sides. The plastic vibrator unit in the present invention has the effects of high front-to-back ratio, high cross-polarization ratio, high isolation and ultra-wideband in the radiation direction, and can meet the performance requirements of 5G communication technology.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna components, in particular to a plastic vibrator. Background Art

[0002] The antenna vibrator is a component on the antenna that has the function of guiding and amplifying electromagnetic waves. It is one of the key components of the antenna. At the same time, the geometric size of the antenna vibrator corresponds to the wavelength of the received or transmitted electromagnetic wave to achieve the maximum radiation and reception effect. Traditional antenna vibrators are mainly made of metal materials, and in the 5G communication era, the structure of the antenna will undergo major changes. On the one hand, the number of single-sector vibrators in a 5G antenna reaches 64, 128, or even 256. The use of metal materials to make vibrators will lead to a significant increase in weight, resulting in high costs and inconvenient installation. On the other hand, the operating frequency of 5G is getting higher and higher, and the wavelength is getting shorter and shorter, which requires higher and higher dimensional accuracy of the vibrator. The dimensional accuracy of the vibrator made of metal materials can no longer meet the requirements of 5G antennas, thus affecting the antenna's gain, radiation pattern, beam pointing, polarization characteristics and other electrical properties.

[0003] In summary, traditional oscillators have technical problems such as high cost, inconvenient installation, and inability to meet the 5G frequency band. Summary of the invention

[0004] In order to solve the technical problems in the prior art that the traditional vibrator has high cost, inconvenient installation, and cannot meet the 5G frequency band, the technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention provides a plastic vibrator unit, comprising a plastic substrate and a plastic vibrator, wherein the plastic substrate and the plastic vibrator are integrally formed by a plastic processing method, and a plurality of the plastic vibrators are evenly distributed on the plastic substrate in an array shape, and a first copper microstrip circuit is arranged on the upper surface of each of the plastic vibrators, and the first copper microstrip circuit forms a first rectangular window with four continuous sides; a second copper microstrip circuit is arranged on the lower surface of each of the plastic vibrators, and the second copper microstrip circuit forms a second rectangular window with four segmented sides.

[0006] The plastic vibrator unit in the present invention can save the production amount of copper microstrip circuits and greatly reduce the production cost of the vibrator by means of coupling feeding distributed in the upper and lower parts of the space, and the upper and lower surfaces of the plastic vibrator are both rectangular windowed, which can better reduce the diameter of the radiation surface. The manufactured plastic vibrator unit has high front-to-back ratio, high cross-polarization ratio, high isolation and ultra-wideband effects in the radiation direction. The plastic material not only has low density, but also is easy to shape. After the plastic material is directly injection molded and then metallized, the obtained plastic vibrator is not only light in weight, but also has high dimensional accuracy, which can meet the requirements for antenna vibrator performance in 5G communication technology.

[0007] Among them, the front-to-back ratio refers to the ratio of the power flux density in the maximum radiation direction of the main lobe (defined as 0°) to the maximum power flux density near the opposite direction (defined as within the range of 180°±20°). It indicates how well the antenna suppresses the back lobe. The larger the front-to-back ratio, the smaller the backward radiation (or reception) of the antenna; the cross-polarization ratio is used to describe the polarization purity of antennas with ±45° polarization or other orthogonal polarization modes. It is specifically defined as the ratio of the main polarization component to the cross-polarization component. The larger the cross-polarization ratio, the stronger the orthogonality of the signal that can be obtained from the antenna, and the phase difference between the two signals. The smaller the correlation, the better the polarization effect. Therefore, the cross-polarization ratio of the antenna is an important indicator for evaluating the quality of the base station antenna. Antenna isolation refers to the ratio of the signal received by another antenna to the signal of the transmitting antenna when one antenna transmits the signal. Isolation is an interference suppression measure taken to minimize the impact of various interferences on the receiver. There are usually several measures. The most important one is to increase the spatial isolation, increase the spatial distance or avoid facing the interference source in the direction. The third is to add a filter at the transmitting end or add a metal isolation net for shielding in the direction of the interference at the receiving end.

[0008] In a possible design, a cross structure is formed in the first rectangular window through the first copper microstrip circuit, and a cross structure is formed in the second rectangular window through the second copper microstrip circuit. This structure can better reduce the diameter of the radiation surface.

[0009] In a possible design, a rib plate adapted to the size of the second copper microstrip circuit is arranged in the groove where the lower surface of the plastic vibrator is located.

[0010] The rib plate is used to improve the strength of the plastic vibrator groove and provide an attachment base for the second copper microstrip circuit.

[0011] Optionally, the rib plate has an arrow-shaped contour, and attaching the second copper microstrip circuit to the arrow-shaped rib plate can enable the antenna to better improve polarization characteristics, isolation, and cross-polarization ratio.

[0012] In a possible design, the plastic substrate is further provided with a third copper microstrip circuit, and the third copper microstrip circuit forms a component network.

[0013] Optionally, the third copper microstrip circuit forms a one-to-three power division network, or may be a one-to-two power division network, a one-to-four power division network, a one-to-five power division network, etc.

[0014] In a possible design, the first copper microstrip circuit, the second copper microstrip circuit, and the third copper microstrip circuit are connected through copperized vias.

[0015] Among them, vias are also called metallized holes. In double-sided boards and multi-layer boards, in order to connect the printed wires between the layers, a common hole, namely a via, is drilled at the intersection of the wires that need to be connected in each layer. A layer of metal is plated on the cylindrical surface of the hole wall of the via by chemical deposition to connect the circuits that need to be connected in the middle layers, and the upper and lower surfaces of the via are made into circular pad shapes.

[0016] Optionally, vias can be not only through holes, but also buried vias. Through holes are holes that penetrate all copper layers; buried vias only penetrate a few copper layers in the middle, as if they were buried by other copper layers.

[0017] In a possible design, the plastic substrate has flanges on both sides, and the outer sides of the flanges have a copper-plated layer. This part can better improve the radiation ±60° cross-polarization ratio and isolation of the antenna.

[0018] In a possible design, the lower surface of the plastic substrate has a copper-plated layer. The copper-plated portion of the lower surface of the plastic substrate contacts the antenna reflector, which is more likely to ensure that the antenna is well grounded.

[0019] In a possible design, the plastic substrate and the plastic vibrator are integrally injection-molded; the plastic substrate is also insert-molded with a copper needle.

[0020] Among them, insert injection molding is a method of pre-fixing metal inserts in appropriate positions in the mold, and then injecting plastic to form it. After the mold is opened, the inserts are tightly wrapped by the cooled and solidified plastic and buried in the product to obtain products with inserts such as threaded rings and electrodes.

[0021] Preferably, the portion where the copper needle part is required to be embedded has an appropriate structure and thickness, so that the portion where the copper needle part is fixed in the mold can be quickly and reliably positioned and prevent the plastic from flowing into the fixing hole; the copper needle part also needs to be specially designed, such as knurling, grooving, twisting and other processing at the embedded portion to ensure its reliability in fixing inside the plastic.

[0022] In a possible design, the plastic substrate and the plastic vibrator are made of polyphenylene sulfide, liquid crystal polymer or polyetherimide. High temperature resistant and electroplatable engineering plastics are used as raw materials for injection molding, so that the product can provide high dielectric constant stability, low thermal expansion coefficient, low water absorption and high mechanical strength, and can better ensure that the manufactured antenna product meets the requirements of low cost and low weight.

[0023] Optionally, the engineering plastics used in the plastic substrate and the plastic vibrator are described in detail as follows:

[0024] Polyphenylene sulfide (PPS) is a special engineering plastic with excellent comprehensive performance. It has excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, excellent dimensional stability, and excellent electrical properties. It is widely used as a structural polymer material and is widely used as a special engineering plastic after filling and modification. At the same time, it can also be made into various functional films, coatings and composite materials, and has been successfully applied in the fields of electronics, aerospace, automobile transportation, etc.

[0025] Liquid crystal polymer (LCP) has a series of excellent properties, such as high strength, high modulus, outstanding heat resistance, extremely small linear expansion coefficient, excellent flame resistance, electrical insulation, chemical corrosion resistance, weathering resistance, microwave permeability, and excellent molding and processing properties. It is used in the fields of electronics, electrical, optical fiber, automobiles, aerospace, etc. It can be made into thin films for soft printed circuits, food packaging, etc.

[0026] Polyetherimide (PEI) is a super engineering plastic made of amorphous polyetherimide. It has the best high temperature resistance and dimensional stability, as well as chemical resistance, flame retardancy, electrical properties, high strength, high rigidity, etc. It is widely used in high temperature resistant terminals, IC bases, lighting equipment, flexible circuit boards, liquid delivery equipment, aircraft internal parts, medical equipment and household appliances.

[0027] In a possible design, the copper-plated layer, the first copper microstrip circuit, the second copper microstrip circuit and the third copper microstrip circuit are attached to the plastic substrate or the surface of the plastic vibrator after being processed by laser engraving and / or electroplating.

[0028] Among them, laser carving, also known as laser engraving processing, is based on CNC technology and uses laser as the processing medium. The physical transformation of the processing material into instant melting and vaporization under the irradiation of laser engraving can enable laser engraving to achieve the processing purpose; electroplating is a process that uses electrolysis to adhere a layer of metal film to the surface of metal or other material parts, thereby enabling the attached substrate to improve its own oxidation resistance, wear resistance, conductivity, reflectivity, corrosion resistance and enhance its aesthetics.

[0029] Optionally, before copper plating the plastic substrate or the plastic vibrator, the surface is roughened by combining mechanical roughening and chemical roughening to form smooth pits, microgrooves and micropores on the surface, thereby improving the surface activity and improving the bonding between the plastic substrate or the plastic vibrator and the coating. The specific mechanical roughening is sandblasting, and the sandblasting material can be 80 mesh, 120 mesh white corundum, brown corundum, etc. Chemical roughening uses hydrofluoric acid etching.

[0030] In the second aspect, the present invention also provides an antenna, including a reflector and the plastic vibrator unit connected to the reflector. The vibrator used in the antenna of the present invention is formed by plastic injection molding and then electroplating, laser engraving and other processing techniques. The characteristics of plastic determine that the vibrator can achieve high-precision and high-performance characteristics to a certain extent, and due to the advantages of the vibrator in labor costs and material costs, the cost of the overall antenna can be reduced and can meet the mobile 5G frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of a plastic vibrator unit provided by an embodiment of the present invention;

[0032] Figure 2 yes Figure 1 Rear view of

[0033] Figure 3 is a three-dimensional diagram of a plastic vibrator provided by an embodiment of the present invention;

[0034] Figure 4 is a back-side stereogram of a plastic vibrator provided by an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of an antenna provided by an embodiment of the present invention.

[0036] Figure numerals: 1. plastic substrate; 11. third copper microstrip circuit; 12. copperized via; 13. flange; 14. copper needle; 2. plastic vibrator; 21. first copper microstrip circuit; 211. first rectangular window; 22. second copper microstrip circuit; 221. second rectangular window; 23. cross structure; 24. rib plate; 3. reflector. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "side", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] It should also be noted that in the embodiments of the present invention, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present invention, the figure may only mark the figure with one of the parts or components as an example. It should be understood that the figure mark is also applicable to other identical parts or components.

[0041] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0042] like Figure 1-5 As shown, this embodiment provides a plastic vibrator unit, including a plastic substrate 1 and a plastic vibrator 2, wherein the plastic substrate 1 and the plastic vibrator 2 are integrally formed by plastic processing, and a plurality of plastic vibrators 2 are evenly distributed on the plastic substrate 1 in an array shape, and a first copper microstrip circuit 21 is arranged on the upper surface of each plastic vibrator 2, and the first copper microstrip circuit 21 forms a first rectangular window 211 with four continuous sides; a second copper microstrip circuit 22 is arranged on the lower surface of each plastic vibrator 2, and the second copper microstrip circuit 22 forms a second rectangular window 221 with four segmented sides, as shown in FIG. Figure 4 As shown, the second rectangular window 221 formed by the second copper microstrip circuit 22 has four sides that are non-continuous and have broken grooves.

[0043] The plastic vibrator unit in this embodiment can save the copper microstrip circuit production amount and thus greatly reduce the production cost of the vibrator by means of coupling feeding distributed in the upper and lower parts of the space, and the upper and lower surfaces of the plastic vibrator 2 are both rectangular windowed, which can better reduce the diameter of the radiation surface, and the manufactured plastic vibrator unit has a high front-to-back ratio, high cross-polarization ratio, high isolation and ultra-wideband effect in the radiation direction. The plastic material not only has low density, but also is easy to shape. After the plastic material is directly injection molded and then metallized, the obtained plastic vibrator 2 is not only light in weight, but also has high dimensional accuracy, which can meet the requirements of antenna vibrator performance in 5G communication technology.

[0044] Among them, the front-to-back ratio refers to the ratio of the power flux density in the maximum radiation direction of the main lobe (defined as 0°) to the maximum power flux density near the opposite direction (defined as within the range of 180°±20°). It indicates how well the antenna suppresses the back lobe. The larger the front-to-back ratio, the smaller the backward radiation (or reception) of the antenna; the cross-polarization ratio is used to describe the polarization purity of antennas with ±45° polarization or other orthogonal polarization modes. It is specifically defined as the ratio of the main polarization component to the cross-polarization component. The larger the cross-polarization ratio, the stronger the orthogonality of the signal that can be obtained from the antenna, and the phase difference between the two signals. The smaller the correlation, the better the polarization effect. Therefore, the cross-polarization ratio of the antenna is an important indicator for evaluating the quality of the base station antenna. Antenna isolation refers to the ratio of the signal received by another antenna to the signal of the transmitting antenna when one antenna transmits the signal. Isolation is an interference suppression measure taken to minimize the impact of various interferences on the receiver. There are usually several measures. The most important one is to increase the spatial isolation, increase the spatial distance or avoid facing the interference source in the direction. The third is to add a filter at the transmitting end or add a metal isolation net for shielding in the direction of the interference at the receiving end.

[0045] In another embodiment, a cross structure 23 is formed in the first rectangular window 211 by the first copper microstrip circuit 21, and a cross structure 23 is formed in the second rectangular window 221 by the second copper microstrip circuit 22. This structure can better reduce the diameter of the radiation surface.

[0046] In another embodiment, a rib plate 24 adapted to the size of the second copper microstrip circuit 22 is arranged in the groove where the lower surface of the plastic vibrator 2 is located.

[0047] The rib plate 24 is used to improve the strength of the plastic vibrator 2 in the groove and to provide an attachment base for the second copper microstrip circuit 22 .

[0048] like Figure 4 As shown, the outline shape of the rib plate 24 is an arrow-shaped figure, and the second copper microstrip circuit 22 is attached to the arrow-shaped rib plate 24, which can make the antenna better improve the polarization characteristics, isolation and cross-polarization ratio.

[0049] In another embodiment, the plastic substrate 1 is further provided with a third copper microstrip circuit 11, and the third copper microstrip circuit 11 forms a power distribution network.

[0050] Optionally, the third copper microstrip circuit 11 forms a one-to-three power division network, and may also be a one-to-two power division network, a one-to-four power division network, a one-to-five power division network, and the like.

[0051] In another embodiment, the first copper microstrip circuit 21 , the second copper microstrip circuit 22 and the third copper microstrip circuit 11 are connected through copperized vias 12 .

[0052] Among them, vias are also called metallized holes. In double-sided boards and multi-layer boards, in order to connect the printed wires between the layers, a common hole, namely a via, is drilled at the intersection of the wires that need to be connected in each layer. A layer of metal is plated on the cylindrical surface of the hole wall of the via by chemical deposition to connect the circuits that need to be connected in the middle layers, and the upper and lower surfaces of the via are made into circular pad shapes.

[0053] Optionally, vias can be not only through holes, but also buried vias. Through holes are holes that penetrate all copper layers; buried vias only penetrate a few copper layers in the middle, as if they were buried by other copper layers.

[0054] In another embodiment, the plastic substrate 1 has flanges 13 on both sides, and the outer sides of the flanges 13 have a copper-plated layer. This part can better improve the radiation ±60° cross-polarization ratio and isolation of the antenna.

[0055] In another embodiment, the lower surface of the plastic substrate 1 has a copper-plated layer. The copper-plated portion of the lower surface of the plastic substrate 1 is in contact with the antenna reflector 3, which is more likely to ensure that the antenna is well grounded.

[0056] In another embodiment, the plastic substrate 1 and the plastic vibrator 2 are integrally injection-molded; the plastic substrate 1 is also insert-molded with a copper needle 14 .

[0057] Among them, insert injection molding is a method of pre-fixing metal inserts in appropriate positions in the mold, and then injecting plastic to form it. After the mold is opened, the inserts are tightly wrapped by the cooled and solidified plastic and buried in the product to obtain products with inserts such as threaded rings and electrodes.

[0058] Preferably, the portion where the copper needle member 14 is required to be embedded has an appropriate structure and thickness, so that the portion in the mold where the copper needle member 14 is fixed can be quickly and reliably positioned and prevent the plastic from flowing into the fixing hole; the copper needle member 14 also needs to be specially designed, such as knurling, grooving, twisting and other processing at the embedded portion to ensure its reliability in fixing inside the plastic.

[0059] In another embodiment, the plastic substrate 1 and the plastic vibrator 2 are made of polyphenylene sulfide, liquid crystal polymer or polyetherimide. High temperature resistant and electroplatable engineering plastics are used as raw materials for injection molding, so that the product can provide high dielectric constant stability, low thermal expansion coefficient, low water absorption and high mechanical strength, and can better ensure that the manufactured antenna product meets the requirements of low cost and low weight.

[0060] Preferably, the engineering plastics used in the plastic substrate 1 and the plastic vibrator 2 are polyphenylene sulfide (PPS), which is a special engineering plastic with excellent comprehensive performance, excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, excellent dimensional stability, and excellent electrical properties. It is widely used as a structural polymer material and is widely used as a special engineering plastic after filling and modification. At the same time, it can also be made into various functional films, coatings and composite materials, which have been successfully applied in the fields of electronics, aerospace, automobile transportation, etc.

[0061] In another embodiment, the copper-plated layer, the first copper microstrip circuit 21, the second copper microstrip circuit 22 and the third copper microstrip circuit 11 are attached to the surface of the plastic substrate 1 or the plastic vibrator 2 after being processed by laser engraving and / or electroplating.

[0062] Among them, laser carving, also known as laser engraving processing, is based on CNC technology and uses laser as the processing medium. The physical transformation of the processing material into instant melting and vaporization under the irradiation of laser engraving can enable laser engraving to achieve the processing purpose; electroplating is a process that uses electrolysis to adhere a layer of metal film to the surface of metal or other material parts, thereby enabling the attached substrate to improve its own oxidation resistance, wear resistance, conductivity, reflectivity, corrosion resistance and enhance its aesthetics.

[0063] Preferably, before copper plating the plastic substrate 1 or the plastic vibrator 2, the surface is roughened by combining mechanical roughening and chemical roughening to form smooth pits, microgrooves and micropores on the surface, thereby improving the surface activity and improving the bonding between the plastic substrate 1 or the plastic vibrator 2 and the coating. The specific mechanical roughening is sandblasting, and the sandblasting material can be 80 mesh, 120 mesh white corundum, brown corundum, etc. Chemical roughening uses hydrofluoric acid etching.

[0064] This embodiment also provides an antenna, including a reflector 3 and a plastic vibrator unit connected to the reflector 3. The vibrator used in the antenna in this embodiment is formed by plastic injection molding and then electroplating, laser engraving and other processing techniques. The characteristics of plastic determine that the vibrator can achieve high-precision and high-performance characteristics to a certain extent, and due to the advantages of the vibrator in labor cost and material cost, the cost of the overall antenna can be reduced and can meet the mobile 5G frequency band.

[0065] Preferably, the plastic vibrator unit is composed of 6 plastic vibrators 2 arranged horizontally, and the antenna includes 16 plastic vibrators 2, which are divided into 8 groups and arranged vertically, and each group includes 2 plastic vibrator units arranged horizontally. The main design of the present invention is to combine in the axial direction. In order to realize simple and fast assembly of the plastic vibrator 2, the plastic vibrator 2 is made into a 1-to-6 mode, and the whole antenna is assembled using 16 groups of plastic modules, which reduces the labor cost of the antenna to a certain extent.

[0066] It should be noted that the number of plastic vibrator units included in the antenna of the present invention is not limited.

[0067] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A plastic vibrator unit, characterized in that: include: Plastic substrate (1); A plastic vibrator (2), wherein a plurality of the plastic vibrators (2) are arranged on the plastic substrate (1), a first copper microstrip circuit (21) is arranged on the upper surface of each of the plastic vibrators (2), and the first copper microstrip circuit (21) forms a first rectangular window (211) with four continuous sides; a second copper microstrip circuit (22) is arranged on the lower surface of each of the plastic vibrators (2), and the second copper microstrip circuit (22) forms a second rectangular window (221) with four segmented sides; A rib plate (24) adapted to the size of the second copper microstrip circuit (22) is arranged in the groove where the lower surface of the plastic vibrator (2) is located, the side of the rib plate (24) facing the groove opening is lower than the plane where the groove opening is located, and the second copper microstrip circuit (22) is arranged on the side of the rib plate (24) facing the groove opening.

2. The plastic vibrator unit according to claim 1, characterized in that: A cross structure (23) is formed in the first rectangular window (211) through the first copper microstrip circuit (21); and a cross structure (23) is formed in the second rectangular window (221) through the second copper microstrip circuit (22).

3. The plastic vibrator unit according to claim 1, characterized in that: The plastic substrate (1) is also provided with a third copper microstrip circuit (11), and the third copper microstrip circuit (11) forms a component network.

4. The plastic vibrator unit according to claim 3, characterized in that: The first copper microstrip circuit (21), the second copper microstrip circuit (22) and the third copper microstrip circuit (11) are connected via copperized vias (12).

5. The plastic vibrator unit according to claim 4, characterized in that: The plastic substrate (1) has flanges (13) on both sides, and the outer sides of the flanges (13) have a copper-plated layer; the lower surface of the plastic substrate (1) has a copper-plated layer.

6. The plastic vibrator unit according to any one of claims 1 to 5, characterized in that: The plastic substrate (1) and the plastic vibrator (2) are integrally injection-molded; the plastic substrate (1) is also insert-molded with a copper needle (14).

7. The plastic vibrator unit according to claim 6, characterized in that: The plastic substrate (1) and the plastic vibrator (2) are made of polyphenylene sulfide, liquid crystal polymer or polyetherimide.

8. The plastic vibrator unit according to claim 5, characterized in that: The copper-plated layer, the first copper microstrip circuit (21), the second copper microstrip circuit (22) and the third copper microstrip circuit (11) are attached to the surface of the plastic substrate (1) or the plastic vibrator (2) after being processed by laser engraving and / or electroplating.

9. An antenna, characterized in that: The invention comprises a reflection plate (3) and a plastic vibrator unit according to any one of claims 1 to 8 connected to the reflection plate (3).

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