UWB copper column antenna, production method and terminal equipment

Abstract

A UWB copper column antenna relates to the technical field of antennas, and comprises a radiator and an injection molding body, the radiator comprises a plurality of structure steps extending along the axial direction, the diameters of the plurality of structure steps are gradually increased from the bottom end to the top end of the radiator, the injection molding body wraps the outer side of the middle section of the radiator, and the injection molding body wraps the outer side of the middle section of the radiator. The structural step with the smallest diameter at the bottom end of the radiator and the structural step with the largest diameter at the top end of the radiator are exposed out of the injection molding body. By adopting the above technical scheme, through cooperation between the radiator and the injection molding body, accurate positioning and stable wrapping between the radiator and the injection molding body are realized, compared with a traditional onboard antenna which realizes installation and positioning of the radiator by using a dielectric substrate, the onboard antenna does not need to use the dielectric substrate, can be used by being directly welded on a product, and is simple and compact in structure and convenient to use. The production cost is reduced, the application range is wide, the stability is better, and the market popularization prospect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to a UWB copper column antenna, a production method thereof, and terminal equipment. Background Art

[0002] As a core component of modern short-range high-speed communications, precise positioning and radar systems, the miniaturization and low-cost manufacturing of ultra-wideband (UWB) antennas have always been the focus of technical research in the industry.

[0003] Traditional UWB antennas often utilize on-board designs such as microstrip patch antennas and printed monopole antennas, achieved by etching a metal radiator onto a dielectric substrate such as FR4 or Rogers. While these designs meet basic performance requirements, they are limited by the limited adaptability of the dielectric substrate and require a large amount of space. The resulting area varies and lacks uniformity, necessitating redesign of antenna placement for different products. Furthermore, the production cost of dielectric substrates is high, particularly high-frequency substrate materials, which are expensive and require customization. This makes it difficult to meet the large-scale deployment requirements of IoT devices. Furthermore, the fixed connection between the radiator and the dielectric substrate in traditional antenna structures makes precise control of the radiator's size difficult, resulting in unstable antenna performance.

[0004] Based on this, the present invention proposes a UWB copper column antenna and a production method, aiming to overcome the above technical limitations. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the on-board UWB antenna has limited applicability due to the different sizes of the dielectric substrates, the antenna position needs to be redesigned for different products, and the production cost of the dielectric substrate is high, which makes it difficult to meet the large-scale deployment needs of Internet of Things terminal devices. At the same time, the radiator and the dielectric substrate are fixed in combination, making it difficult to achieve precise control of the radiator size, resulting in unstable antenna performance. The present invention provides a UWB copper column antenna, a production method, and a terminal device.

[0006] The first aspect of the present invention provides a UWB copper column antenna, and the technical solution adopted is: a UWB copper column antenna, including a radiator and an injection molded body, the radiator including a plurality of structural steps extending along the axial direction, the diameters of the plurality of structural steps gradually increasing from the bottom end to the top end of the radiator, the injection molded body covering the outer side of the middle section of the radiator, and the structural step with the smallest diameter at the bottom end of the radiator and the structural step with the largest diameter at the top end are both exposed in the injection molded body.

[0007] Optionally, the number of the structural steps is five, which are the first step, the second step, the third step, the fourth step and the fifth step from the top to the bottom of the radiator, the bottom side of the first step abuts against the top surface of the injection molded body, the fifth step extends from the bottom of the injection molded body, and the second step, the third step and the fourth step are all located inside the radiator.

[0008] Optionally, a stepped abutment boss is provided inside the injection molded body, and the stepped surfaces of the stepped abutment boss abut against the second step, the third step and the fourth step respectively.

[0009] Optionally, an anti-slip ridge is provided on the third step, and the anti-slip ridge is arranged around the outer surface of the third step. An anti-slip groove cooperating with the anti-slip ridge is correspondingly provided in the injection molded body.

[0010] Optionally, the lengths of the first step, the second step and the third step are all 2.10 mm to 2.20 mm, the length of the fourth step is 1.60 mm to 1.70 mm, and the length of the fifth step is 2.05 mm to 2.15 mm.

[0011] Optionally, the diameter of the first step is 4.96mm to 5.04mm, the diameter of the second step is 3.96mm to 4.04mm, the diameter of the third step is 2.96mm to 3.04mm, the diameter of the fourth step is 1.46mm to 1.54mm, and the diameter of the fifth step is 0.76mm to 0.84mm.

[0012] Optionally, the side of the first structural step close to the second structural step, the side of the second structural step close to the third structural step, the side of the third structural step close to the fourth structural step, the side of the fourth structural step close to the fifth structural step, and the side of the fifth structural step away from the fourth structural step are all arranged in a circular arc transition.

[0013] A second aspect of the present invention provides a method for producing a UWB copper post antenna, which is suitable for producing the UWB copper post antenna described above, comprising the following steps: Step 1: Prepare a copper column that meets production requirements according to predetermined dimensions. Use a CNC lathe to cut the copper column from the bottom to the top to form multiple structural steps with gradually increasing diameters to obtain a radiator. Step 2: Fix the processed radiator vertically in the preset injection mold so that the largest structural step at the top of the radiator and the smallest structural step at the bottom of the radiator are both located outside the molding cavity of the injection mold, inject the injection material into the molding cavity of the injection mold, and complete the preparation of the UWB copper column antenna after cooling and demolding.

[0014] Optionally, when a plurality of structural steps with gradually increasing diameters are formed by cutting from the bottom end to the bottom end of the copper column using a CNC lathe, an anti-slip convex edge needs to be simultaneously formed on one of the structural steps in the middle of the copper column.

[0015] A third aspect of the present invention further provides a terminal device comprising at least one UWB copper post antenna as described above.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: This application achieves precise positioning and stable wrapping between the radiator and the injection-molded body through the cooperation between the radiator and the injection-molded body. Compared with the traditional board-mounted antenna that uses a dielectric substrate to achieve the installation and positioning of the radiator, this application does not require the use of a dielectric substrate and can be directly welded on the product for use. It has a simple and compact structure, reduces production costs, has a wide range of applications, has good stability, and has good market promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the UWB copper column antenna in the present invention; Figure 2 is a cross-sectional view of the UWB copper post antenna of the present invention; Figure 3 This is an exploded view of the UWB copper column antenna of the present invention; Figure 4 is a cross-sectional view of the injection molded body of the UWB copper post antenna of the present invention; Figure 5 is a flow chart of the production method for preparing a UWB copper post antenna in the present invention; Figure 6 It is the standing wave ratio diagram of Tr1, Tr2, and Tr3 in the present invention; Figure 7 It is the isolation degree diagram of Tr1, Tr2, and Tr3 in the present invention; Figure 8 It is the antenna efficiency diagram of Tr1, Tr2 and Tr3 in the present invention; Figure 9 It is the 2D directivity diagram when the operating frequency of Tr1 in the present invention is 1-6500 MHZ; Figure 10The operating frequency of Tr1 in the present invention is a 2D directivity diagram within 1-8000 MHZ; Figure 11 It is the 2D directivity diagram when the operating frequency of Tr2 in the present invention is 1-6500 MHZ; Figure 12 The operating frequency of Tr2 in the present invention is a 2D directivity diagram within 1-8000 MHZ; Figure 13 It is the 2D directivity diagram when the operating frequency of Tr3 in the present invention is 1-6500 MHZ; Figure 14 It is a 2D directivity diagram in which the operating frequency of Tr3 in the present invention is within 1-8000 MHZ.

[0019] Explanation of the accompanying drawings: 10, radiator; 11, first step; 12, second step; 13, third step; 14, fourth step; 15, fifth step; 16, anti-slip edge; 20, injection molded body; 21, stepped abutment boss; 22, anti-slip groove. DETAILED DESCRIPTION

[0020] The following is a combination of the embodiments of the present invention Figures 1-14 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] This embodiment relates to a UWB copper column antenna, referring to Figure 1-Figure 5 , including a radiator 10 and an injection molded body 20. The radiator 10 includes a plurality of structural steps extending along the axial direction. The diameters of the plurality of structural steps gradually increase from the bottom end to the top end of the radiator 10. The injection molded body 20 is coated on the outer side of the middle section of the radiator 10, and the structural step with the smallest diameter at the bottom end and the structural step with the largest diameter at the top end of the radiator 10 are both exposed outside the injection molded body 20.

[0024] The radiator 10 is an axial conductor formed by metal processing. Specifically, it can be made of copper material and CNC-machined into a stepped column. The steps are annular protrusions distributed along the axial direction of the radiator 10. By adjusting the diameter difference between adjacent rings, the impedance gradient can be achieved, thereby expanding the operating bandwidth. The injection molded body 20 is an insulating support structure covering the middle section of the radiator 10. It can be injection-molded using a thermoplastic material. It fixes the radiator 10 while preventing electromagnetic interference from the radiating areas at both ends.

[0025] Compared with the traditional UWB on-board antenna that relies on a dielectric substrate as the carrier of the radiator 10, the present application adopts a metal column structure and forms an injection molded body through in-mold injection molding on the outside of the metal main structure, which reduces the cost of the substrate material. It can eliminate the cost and space limitations brought by the dielectric substrate while retaining the ultra-wideband performance, so that the antenna can quickly adapt to the installation requirements of diversified Internet of Things devices. The coordinated design of the injection molded body 20 and the exposed steps ensures structural stability and maintains the high-frequency signal radiation frequency, providing a feasibility basis for large-scale standardized production.

[0026] Furthermore, there are five steps, which are the first step 11, the second step 12, the third step 13, the fourth step 14 and the fifth step 15 from the top to the bottom of the radiator 10. The second step 12, the third step 13 and the fourth step 14 are all located inside the radiator 10. The bottom side of the first step 11 abuts against the top surface of the injection molded body 20, and the fifth step 15 extends from the bottom of the injection molded body.

[0027] Specifically, the five steps are arranged in sequence along the axial direction. The first step 11 with the largest diameter at the top and the fifth step 15 with the smallest diameter at the bottom are both exposed to the radiator 10. The second step 12, the third step 13 and the fourth step 14 in the middle are completely embedded in the injection molded body 20. After the three steps in the middle are wrapped by the injection molded body 20, the structural stability is guaranteed and the signal interference caused by exposed metal is avoided.

[0028] Compared to existing technologies, traditional microstrip antennas rely on dielectric substrate etching, limiting the size of their radiating elements to the substrate area and preventing layered arrangement. This solution overcomes the size constraints of planar antennas by turning copper pillars to create a three-dimensional stepped structure. The stepped steps are formed directly from copper, reducing material loss compared to printed circuit processes while eliminating the impact of the substrate's dielectric constant on performance.

[0029] This application achieves multi-band coverage while maintaining antenna miniaturization. The stepped arrangement of the five steps produces overlapping radiation fields, effectively expanding the operating bandwidth. By forming the molded body 20 on the outer sides of the second step 12, the third step 13, and the fourth step 14 through in-mold injection molding, mechanical strength is enhanced to prevent structural deformation caused by high-frequency vibration.

[0030] Furthermore, the bottom side of the first step 11 abuts the top surface of the molded body 20, and the fifth step 15 extends from the bottom of the molded body 20. Abutment refers to the formation of a support and constraint relationship between the two contact surfaces. This can be achieved by axially positioning the step during injection molding, thereby limiting the longitudinal displacement of the radiator 10 within the molded body 20. Extension refers to the extension of the end portion of the step to the outside of the molded body 20 and its exposure. This can be achieved by providing a reserved channel at the bottom of the injection mold to minimize direct contact between the step and the external environment to ensure signal radiation efficiency.

[0031] By precisely controlling the coverage of the injection molded body 20, the mechanical strength of the copper pillar structure is preserved while avoiding high-frequency signal absorption losses caused by the dielectric material. This effectively addresses the signal attenuation problem caused by completely encapsulating the antenna radiating element in traditional processes. Furthermore, through the synergistic effect of abutment positioning and exposed extension, the antenna's radiation efficiency and structural stability are simultaneously optimized while simplifying the assembly process.

[0032] Furthermore, a stepped abutting boss 21 is provided inside the injection molded body 20 . The stepped abutting boss 21 has three abutting surfaces, which respectively abut against the second step 12 , the third step 13 and the fourth step 14 .

[0033] The stepped abutment boss 21 refers to a multi-level structural step formed along the inner wall of the injection molded body 20. Specifically, the radiator 10 can be placed in the injection mold, and the first step 11 at the top and the fifth step 15 at the bottom of the radiator 10 are extended out of the molding cavity. Finally, the injection molding material is injected, that is, the radiator 10 is integrally molded with the injection molded body 20 in the molding cavity, thereby completing the assembly of the radiator 10 and the injection molded body 20, further simplifying the production process and reducing production costs.

[0034] Furthermore, an anti-slip ridge 16 is provided on the third step 13 , and the anti-slip ridge 16 is arranged around the outer surface of the third step 13 . An anti-slip groove 22 cooperating with the anti-slip ridge 16 is correspondingly provided in the injection molded body 20 .

[0035] In this embodiment, the anti-slip protrusion 16 is provided on the third step 13 . In other embodiments, the anti-slip protrusion 16 may also be provided on the second step 12 or the fourth step 14 , which is not limited here.

[0036] Specifically, the anti-slip protrusion 16 forms a physical barrier on the outside of the third step 13. When the injection molded body 20 is injection molded on the outside of the radiator 10, an anti-slip groove 22 is generated inside the injection molded body 20 to cooperate with the anti-slip protrusion 16, thereby forming a mechanical lock to prevent axial displacement between the radiator 10 and the injection molded body 20, further improving the stability of the structure.

[0037] Furthermore, the lengths of the first step 11, the second step 12 and the third step 13 are equal, and the lengths of the three steps are all 2.10mm to 2.20mm, the length of the fourth step 14 is 1.60mm to 1.70mm, and the length of the fifth step 15 is 2.05mm to 2.15mm.

[0038] Furthermore, the diameter of the first step 11 is 4.96 mm to 5.04 mm, the diameter of the second step 12 is 3.96 mm to 4.04 mm, the diameter of the third step 13 is 2.96 mm to 3.04 mm, the diameter of the fourth step 14 is 1.46 mm to 1.54 mm, and the diameter of the fifth step 15 is 0.76 mm to 0.84 mm.

[0039] By setting the lengths and diameters of the first step 11, the second step 12, the third step 13, the fourth step 14 and the fifth step 15 to the above-mentioned values, and because the UWB copper column antenna provided by the present application adopts a traveling wave antenna in the form of a monopole, the UWB copper column antenna provided by the present application has the advantages of wide bandwidth, high efficiency and good directionality compared to the existing board-mounted UWB antenna.

[0040] In a specific embodiment, the lengths of the first step 11, the second step 12 and the third step 13 are 2.15 mm, the length of the fourth step 14 is 1.65 mm, the length of the fifth step 15 is 2.10 mm, the diameter of the first step 11 is 5.00 mm, the diameter of the second step 12 is 4.00 mm, the diameter of the third step 13 is 3.00 mm, the diameter of the fourth step 14 is 1.50 mm, and the diameter of the fifth step 15 is 0.80 mm.

[0041] Furthermore, the side of the first step 11 close to the second step 12, the side of the second step 12 close to the third step 13, the side of the third step 13 close to the fourth step 14, the side of the fourth step 14 close to the fifth step 15, and the side of the fifth step 15 away from the fourth step 14 are all arranged in a circular arc transition.

[0042] By providing an arc-shaped transition at the end of each step, the sudden current change and reflection loss during high-frequency signal transmission can be effectively reduced, allowing the current to transition naturally along the arc path, reducing impedance mismatch. This design smoothes the propagation path of electromagnetic waves between adjacent steps, thereby improving the antenna's radiation efficiency within an ultra-wideband. For example, the arc structure at the end of the fifth step 15 can suppress the sharp attenuation of the terminal current and enhance radiation performance in the low-frequency band.

[0043] 5 , the present application also provides a method for producing a UWB copper post antenna, which is suitable for producing the UWB copper post antenna described above, comprising the following steps: Step 101: Prepare a copper column that meets production requirements according to a predetermined size, and use a CNC lathe to sequentially cut from the bottom end to the top end of the copper column to form a plurality of structural steps with gradually increasing diameters to obtain a radiator 10; Step 102: fix the processed radiator 10 vertically in a preset injection mold so that the largest structural step at the top of the radiator 10 and the smallest structural step at the bottom of the radiator 10 are both located outside the molding cavity of the injection mold, inject the injection material into the molding cavity of the injection mold, and complete the preparation of the UWB copper column antenna after cooling and demolding.

[0044] In this embodiment, there are five steps, namely, first step 11, second step 12, third step 13, fourth step 14, and fifth step 15. An injection mold is a tool used to mold plastic structures, and can be implemented using a split steel mold. A molding cavity matching the shape of radiator 10 is provided inside the mold, and molten plastic is filled into the molding cavity through injection pressure. A CNC lathe is a machine tool whose machining path is controlled by a computer program, and can be implemented using a precision lathe with an automatic tool change system. The copper pillar is subjected to step-cutting processing using a preset program. The exterior of the molding cavity refers to the area that does not come into contact with the plastic after the mold is closed. This can be achieved by designing the mold parting surface so that the maximum and minimum steps are in a non-enclosed space during the injection molding process.

[0045] Specifically, during the copper column processing stage, the CNC lathe is programmed to gradually increase the cutting diameter from the bottom to the top, forming five stepped structural steps, with the first step 11 of the largest diameter at the top and the fifth step 15 of the smallest diameter at the bottom. During the injection molding process, the parting surface of the mold is designed at the position of the third step 13, so that the first step 11 at the top is completely exposed to the outside of the upper mold cavity, and the fifth step 15 at the bottom extends to the outside of the lower mold cavity. The plastic material is only wrapped in the three middle steps. By controlling the injection molding pressure to maintain it in the range of 5-8MPa, the molten polycarbonate material is evenly filled into the gaps between the second, third, and fourth steps 14. After cooling and solidification, an injection molded body 20 is formed that fits tightly with the metal structure.

[0046] Compared with the existing technology, traditional board-mounted antennas require etching processing on the dielectric substrate, while this method directly uses CNC-processed metal copper columns to form a three-dimensional radiator 10, avoiding the high cost of the substrate. By combining mold positioning with injection molding technology, the antenna structure packaging can be completed in a single molding process while maintaining free space at both ends of the radiator 10, thereby adapting to the rigid requirements of IoT devices for antenna miniaturization, standardization and large-scale assembly.

[0047] Furthermore, when a plurality of structural steps with gradually increasing diameters are formed by cutting from the bottom end to the bottom end of the copper column by a CNC lathe, an anti-slip convex edge 16 needs to be simultaneously formed on one of the structural steps in the middle of the copper column.

[0048] In this embodiment, the anti-slip protrusion 16 and the third step 13 are integrally turned and formed. By integrally forming the anti-slip protrusion 16 on the third step 13, during subsequent injection molding, an anti-slip groove 22 that is compatible with the anti-slip protrusion 16 can be generated inside the injection molded body 20, thereby further improving the stability between the radiator 10 and the injection molded body 20.

[0049] Furthermore, the present application also provides a terminal device comprising at least one UWB copper post antenna as described above. Specifically, when there is one antenna, it can be used for a UWB time-of-flight positioning system; when there are two antennas, it can be used for a two-dimensional positioning system using TDOA time difference of arrival or PDOA phase difference of arrival; and when there are three or more antennas, it can be used for UWB three-dimensional positioning, specifically to simultaneously obtain horizontal azimuth and vertical pitch angle measurements to determine a three-dimensional position.

[0050] In addition, this application also tests the performance of the UWB copper column antenna, specifically testing the standing wave ratio, isolation, antenna efficiency and directivity of the UWB copper column antenna. For test data, please refer to Figure 6-Figure 12 It should be noted that, in this embodiment, three UWB copper post antennas are distributed circumferentially on a common double-sided FR4 board for testing, and these three UWB copper post antennas are named Tr1, Tr2, and Tr3.

[0051] Figure 6 is the standing wave ratio diagram of Tr1, Tr2, and Tr3, Figure 6 It can be seen that when the frequency band is around 6.8GHZ, the standing wave ratio of Tr1, Tr2, and Tr3 is relatively low, indicating that near this frequency band, the performance of the three antennas is relatively good, the signal reflection is small, and the antenna and transmission line are highly matched.

[0052] Figure 7 is the isolation degree graph of Tr1, Tr2, and Tr3, Figure 7 It can be seen that when the frequency band is near 6.2GHZ, the S21 value is -19.730dB. Compared with the S21 values ​​of other marked frequency points, its absolute value is larger, which means that near this frequency band, the mutual interference between Tr1, Tr2, and Tr3 antennas is small, and the performance is relatively good.

[0053] Figure 8 is the antenna efficiency diagram of Tr1, Tr2, and Tr3, Figure 8 It can be seen that Tr1 has relatively high gain and good efficiency in the 6700-6800MHz frequency band. For example, at 6700MHz, the gain is 5.03dBi and the efficiency is 76.91%. At 6800MHz, the gain is 5.53dBi and the efficiency is 74.39%. The performance in this frequency band is good. Tr2 has outstanding gain and efficiency performance in the 6650-6800MHz frequency band, with a gain of 4.89dBi and an efficiency of 80.26% at 6650MHz; a gain of 5.25dBi and an efficiency of 79.36% at 6700MHz; and a gain of 5.59dBi and an efficiency of 75.59% at 6800MHz, showing excellent performance in this frequency band. Tr3 has good overall gain and efficiency in the 6650-6750MHz frequency band. At 6650MHz, the gain is 4.28dBi and the efficiency is 84.17%; at 6700MHz, the gain is 4.64dBi and the efficiency is 83.95%; at 6750MHz, the gain is 4.50dBi and the efficiency is 76.92%. The performance in this frequency band is relatively good.

[0054] Figure 9 This is the 2D directivity diagram when the Tr1 operating frequency is 1-6500MHZ. Figure 9 The three small figures in the figure are the changes of the electric field intensity of Tr1 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 9 It can be seen that the directivity of Tr1 is better when the operating frequency is 1-6500MHZ.

[0055] Figure 10 This is the 2D directivity diagram when the Tr2 operating frequency is 1-6500MHZ. Figure 10 The three small figures in the figure are the changes of the electric field intensity of Tr2 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 10 It can be seen that the directivity of Tr2 is better when the operating frequency is 1-6500MHZ. Figure 11 This is the 2D directivity diagram when the Tr3 operating frequency is 1-6500MHZ. Figure 10 The three small figures in the figure are the changes of the electric field intensity of Tr3 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 11 It can be seen that the directivity of Tr3 is better when the operating frequency is 1-6500MHZ. Figure 12 This is the 2D directivity diagram when the Tr1 operating frequency is 1-8000MHZ. Figure 12 The three small figures in the figure are the changes of the electric field intensity of Tr1 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 12 It can be seen that the directivity of Tr1 is better when the operating frequency is 1-8000MHZMHZ.

[0056] Figure 13 This is the 2D directivity diagram when the Tr2 operating frequency is 1-8000MHZ. Figure 13The three small figures in the figure are the changes of the electric field intensity of Tr2 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 13 It can be seen that the directivity of Tr2 is better when the operating frequency is 1-8000MHZMHZ.

[0057] Figure 14 This is the 2D directivity diagram when the Tr3 operating frequency is 1-8000MHZ. Figure 14 The three small figures in the figure are the changes of the electric field intensity of Tr3 in the XZ plane, YZ plane and XY plane with the angle. In the figure, Eh represents the horizontal polarization electric field intensity, Ev represents the vertical polarization electric field intensity, and Etotal represents the total electric field intensity. Figure 14 It can be seen that the directivity of Tr3 is better when the operating frequency is 1-8000MHZMHZ.

[0058] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A UWB copper column antenna, characterized in that: The invention comprises a radiator (10) and an injection molded body (20), wherein the radiator (10) comprises a plurality of structural steps extending in an axial direction, wherein the diameters of the plurality of structural steps gradually increase from the bottom end to the top end of the radiator (10), and the injection molded body (20) is coated on the outer side of the middle section of the radiator (10), and the structural step with the smallest diameter at the bottom end and the structural step with the largest diameter at the top end of the radiator (10) are both exposed on the injection molded body (20).

2. A UWB copper column antenna according to claim 1, characterized in that: The number of the structural steps is five, and from the top to the bottom of the radiator (10) are respectively the first step (11), the second step (12), the third step (13), the fourth step (14) and the fifth step (15), the bottom side of the first step (11) abuts against the top surface of the injection molded body (20), the fifth step (15) extends from the bottom of the injection molded body, and the second step (12), the third step (13) and the fourth step (14) are all located inside the radiator (10).

3. A UWB copper column antenna according to claim 2, characterized in that: A stepped abutting boss (21) is provided inside the injection molded body (20), and the stepped surfaces of the stepped abutting boss (21) abut against the second step (12), the third step (13) and the fourth step (14) respectively.

4. The UWB copper column antenna according to claim 2, characterized in that: The third step (13) is provided with an anti-slip convex edge (16), which is arranged around the outer surface of the third step (13), and the injection molded body (20) is provided with an anti-slip groove (22) corresponding to the anti-slip convex edge (16).

5. The UWB copper column antenna according to claim 2, characterized in that: The lengths of the first step (11), the second step (12) and the third step (13) are all 2.10 mm to 2.20 mm, the length of the fourth step (14) is 1.60 mm to 1.70 mm, and the length of the fifth step (15) is 2.05 mm to 2.15 mm.

6. The UWB copper column antenna according to claim 2, characterized in that: The diameter of the first step (11) is 4.96 mm to 5.04 mm, the diameter of the second step (12) is 3.96 mm to 4.04 mm, the diameter of the third step (13) is 2.96 mm to 3.04 mm, the diameter of the fourth step (14) is 1.46 mm to 1.54 mm, and the diameter of the fifth step (15) is 0.76 mm to 0.84 mm.

7. The UWB copper column antenna according to claim 2, characterized in that: The side of the first step (11) close to the second step (12), the side of the second step (12) close to the third step (13), the side of the third step (13) close to the fourth step (14), the side of the fourth step (14) close to the fifth step (15), and the side of the fifth step (15) away from the fourth step (14) are all arranged in an arc transition.

8. A method for producing a UWB copper post antenna, suitable for producing the UWB copper post antenna according to any one of claims 1 to 7, comprising the following steps: A copper column that meets production requirements is prepared according to predetermined dimensions, and a CNC lathe is used to sequentially cut from the bottom end to the top end of the copper column to form a plurality of structural steps with gradually increasing diameters, thereby obtaining a radiator (10); The processed radiator (10) is fixed vertically in a pre-set injection mold so that the largest structural step at the top of the radiator (10) and the smallest structural step at the bottom of the radiator (10) are both located outside the molding cavity of the injection mold, and injection molding material is injected into the molding cavity of the injection mold. After cooling and demoulding, the preparation of the UWB copper column antenna is completed.

9. The method for producing a UWB copper column antenna according to claim 8, characterized in that: When a plurality of structural steps with gradually increasing diameters are formed by sequentially cutting from the bottom end to the bottom end of the copper column by a numerically controlled lathe, an anti-slip convex edge (16) needs to be synchronously formed on one of the structural steps in the middle of the copper column.

10. A terminal device, characterized in that: The method comprises at least one UWB copper post antenna according to any one of claims 1 to 7.

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