A dipole antenna device and communication equipment

Abstract

This invention relates to the field of communication technology and discloses a dipole antenna device and communication equipment. The device includes a dielectric substrate, a dipole main radiating element, a stepped coupling plate, and a parasitic slot. The dipole main radiating element is located on the front side of the dielectric substrate, while the stepped coupling plate and the parasitic slot are located on the back side. The dipole main radiating element is used for signal transmission and reception. The stepped coupling plate forms a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating element. The parasitic slot generates conjugate resonance with the stepped coupling plate. Through this dipole antenna device, interference from specific frequencies on the antenna's transmission and reception performance can be effectively suppressed without affecting the antenna's transmission and reception performance within a specified frequency range. This results in a highly selective frequency response and stable omnidirectional radiation characteristics, along with strong anti-interference capabilities.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a dipole antenna device and communication equipment. Background Technology

[0002] In the field of communication technology, constantly updated communication technologies support the foundation of ultra-broadband backbone network technology. This high-speed broadband network establishes channels to meet the needs of various social sectors, enabling enterprises to achieve new market models such as remote control applications. At the very end of the entire communication network, countless different types of devices will need to connect to the broadband network to meet the diverse application needs of society. The most convenient and flexible access method for these devices is wireless, as it saves significant network deployment costs, easily provides flexible access anytime, anywhere, and is relatively simple to maintain. The latest developments in Wi-Fi 6E and 5G (fifth-generation mobile communication) are ultra-high-speed, ultra-broadband communication technologies. One of their core technologies is the multi-antenna, multi-port MIMO operating mode, which also operates on multiple frequency bands simultaneously, enabling signal speeds exceeding 10 GMbps.

[0003] However, in this ultra-wideband operating mode, the utilization rate of spectrum resources is getting higher and higher, and the situation of adjacent channels working simultaneously is becoming more and more common, which can easily cause mutual interference. As the core component of wireless communication, the performance of the entire system is closely related to the antenna.

[0004] Conventional dipole antennas possess unique advantages such as simple structure, light weight, conformal design, low manufacturing cost, and high radiation efficiency. Because they use a balun to balance the ground current, their radiation field is very stable, exhibiting clear horizontal and vertical radiation axes. These antennas have a wide impedance bandwidth, often reaching 18% of the effective bandwidth, making them highly effective and widely used. However, this very characteristic of dipole antennas makes them highly susceptible to interference when multiple antennas operate in adjacent channels and are distributed within the same system. Therefore, in conventional antenna system design, when adjacent channel antennas are used in the same product, the basic approach is to arrange them at maximum distance and overlap the angles to achieve high isolation between adjacent channels. However, this method does not significantly suppress or reduce the transmission and reception performance of adjacent channels and results in a large amount of space being reserved for antennas, leading to increased product size, complex molds, difficulty in integration, and increased operating costs. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a dipole antenna device and communication equipment.

[0006] This invention provides the following technical solution:

[0007] In a first aspect, this disclosure provides a dipole antenna device, which includes a dielectric substrate, a dipole main radiating element, a stepped coupling plate, and a parasitic slot.

[0008] The dipole main radiating unit is located on the front side of the dielectric substrate, and the stepped coupling sheet and the parasitic groove are both located on the back side of the dielectric substrate.

[0009] The dipole main radiating unit is used for signal transmission and reception;

[0010] The stepped coupling plate is used to form a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating unit.

[0011] The parasitic groove is used to generate conjugate resonance with the stepped coupling plate.

[0012] Furthermore, the dipole main radiating unit includes a balun and a balun upper boss;

[0013] The balun is located in the middle of the main radiating unit of the dipole, and the upper boss of the balun is located at the upper end of the balun.

[0014] Furthermore, the balun is perpendicular to and orthogonal to the dipole main radiating unit, forming a U-shaped structure, which includes a strip-shaped first structure, a strip-shaped second structure, and a strip-shaped third structure.

[0015] The first structure is parallel to the second structure, and the third structure is perpendicular to the first structure;

[0016] The first structure and the second structure are located on both sides of the third structure, and are respectively connected to the opposite ends of the third structure;

[0017] The upper end of the second structure is provided with the upper boss of the balun.

[0018] Furthermore, the stepped coupling plate includes a first-level coupling plate, a second-level coupling plate, and a third-level coupling plate;

[0019] The first-stage coupling plate resonates at the lower limit of the preset operating frequency of the dipole antenna;

[0020] The secondary coupling plate resonates at the center frequency of the preset operating frequency of the dipole antenna;

[0021] The three-stage coupling plate resonates at the upper limit of the preset operating frequency of the dipole antenna.

[0022] Furthermore, the primary coupling plate, the secondary coupling plate, and the tertiary coupling plate adopt a three-stage gradient structure, with the primary coupling plate located at the bottom, the secondary coupling plate located in the middle, and the tertiary coupling plate located at the top; wherein, the length of the primary coupling plate is greater than the length of the secondary coupling plate, and the length of the secondary coupling plate is greater than the length of the tertiary coupling plate.

[0023] Furthermore, the parasitic groove is configured as a serpentine groove, located in the middle of the stepped coupling plate, and arranged at a 90-degree angle to the balun.

[0024] Furthermore, the length of the parasitic slot corresponds to 1 / 4 wavelength of the center frequency point of the preset operating frequency of the dipole antenna.

[0025] Furthermore, the dipole main radiating unit and the stepped coupling plate are centrally symmetrical.

[0026] Furthermore, the depth of the slot in the middle of the balun corresponds to 1 / 4 of the length of the center frequency of the preset operating frequency of the dipole antenna.

[0027] Secondly, this disclosure provides a communication device including the dipole antenna device as described in the first aspect.

[0028] The embodiments of this application have the following advantages:

[0029] The dipole antenna device provided in this application includes a dielectric substrate, a dipole main radiating element, a stepped coupling plate, and a parasitic slot. The dipole main radiating element is located on the front side of the dielectric substrate, while the stepped coupling plate and the parasitic slot are both located on the back side of the dielectric substrate. The dipole main radiating element is used for signal transmission and reception. The stepped coupling plate forms a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating element. The parasitic slot generates conjugate resonance with the stepped coupling plate. This dipole antenna device effectively suppresses interference from specific frequencies on the antenna's transmission and reception performance without affecting its transmission and reception performance within a specified frequency range. This results in a highly selective frequency response and stable omnidirectional radiation characteristics, along with strong anti-interference capabilities.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the various drawings, similar components are numbered similarly.

[0032] Figure 1 This paper presents a three-dimensional perspective view of a dipole antenna device according to an embodiment of the present application;

[0033] Figure 2 This paper shows a front structural schematic diagram of a dipole antenna device provided in an embodiment of the present application;

[0034] Figure 3 This paper shows a schematic diagram of the rear structure of a dipole antenna device according to an embodiment of the present application;

[0035] Figure 4 The frequency response curve of a conventional dipole antenna device is shown.

[0036] Figure 5 The frequency response curve of a dipole antenna device provided in an embodiment of this application is shown.

[0037] Explanation of key component symbols:

[0038] 10-Dielectric substrate; 20-Dipole main radiating unit; 21-Ballon; 211-First structure; 212-Second structure; 213-Third structure; 22-Upper boss of ballon; 23-First branch; 24-Second branch; 30-Stepped coupling plate; 31-Primary coupling plate; 32-Secondary coupling plate; 33-Tertiary coupling plate; 40-Parasitic groove; 41-Left strip groove; 42-Right strip groove; 43-Rising ridge. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Example

[0045] like Figure 1 The image shows a dipole antenna device according to an embodiment of this application. The device is capable of covering frequency ranges such as LTE, Sub-6G, WIFI6, and WIFI6E. The dipole antenna device shown includes a dielectric substrate 10, a dipole main radiating element 20, a stepped coupling plate 30, and a parasitic slot 40.

[0046] The dipole main radiating unit 20 is located on the front side of the dielectric substrate 10, and the stepped coupling sheet 30 and the parasitic groove 40 are both located on the back side of the dielectric substrate 10.

[0047] The dipole main radiating unit 20 is used for signal transmission and reception;

[0048] The stepped coupling plate 30 is used to form a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating unit 20.

[0049] The parasitic groove 40 is used to generate conjugate resonance with the stepped coupling plate 30.

[0050] like Figure 2 The diagram shows a front view of the dipole antenna device. The front of the device includes the dielectric substrate 10 and the dipole main radiating element 20, which is symmetrical about its center. The dipole main radiating element 20 includes a balun 21 and an upper boss 22. The balun is perpendicular to and orthogonal to the dipole main radiating element, forming a U-shaped structure with one open end. This U-shaped structure includes a strip-shaped first structure 211, a strip-shaped second structure 212, and a strip-shaped third structure 213. The first structure is parallel to the second structure, and the third structure is perpendicular to the first structure. The first structure 211 and the second structure 212 are located on opposite sides of the third structure 213 and are connected to the opposite ends of the third structure 213 to form a U-shaped structure. In practical applications, the U-shaped structure facilitates the placement of a grounding point between the first structure 211 and the upper boss 22 of the balun, and also facilitates the connection of antenna front-end devices.

[0051] It is understood that in this embodiment, the first structure 211, the second structure 212, and the third structure 213 are all rectangular strip structures. However, the specific shapes can be determined according to actual conditions, such as a long spiral structure. This embodiment does not limit this. Furthermore, when setting the first structure 211 and the second structure 212, their widths can be equal or approximately equal. The specific widths can be determined according to actual conditions. This embodiment does not limit this. Additionally, the first structure 211 and the second structure 212 are parallel, but in practice, they can also be approximately parallel. This embodiment does not limit this.

[0052] It is understood that in this embodiment, the material used for the front layer of metal body where the dielectric substrate 10 and the dipole main radiating unit 20 are located is copper. The specific material used can be determined according to the actual situation, and this application embodiment does not limit it.

[0053] Specifically, the dipole main radiating element 20 is used for signal transmission and reception. A balun 21 is disposed in the middle of the dipole main radiating element 20. The balun 21 is used to match the impedance of the ground current generated by the dipole main radiating element 20. The slot depth in the middle of the balun 21 is equal to that of the dipole main radiating element 20, and both are equal to 1 / 4 wavelength of the center frequency of the preset operating frequency of the dipole antenna. It is understood that in this embodiment, the preset operating frequency of the dipole antenna is 5GHz-5.8GHz. The specific operating frequency can be determined according to actual conditions, and this application embodiment does not limit it.

[0054] It should be noted that, according to antenna theory, a dipole is a balanced antenna, while the antenna feed line is generally a coaxial cable, which is an unbalanced transmission line. If the two are directly connected, a high-frequency current will flow through the outer sheath of the coaxial cable. The presence of a high-frequency current on the outer sheath inevitably introduces radiation components, potentially affecting the antenna's polarization direction. Therefore, a balun is added between the antenna and the cable to suppress the current flowing into the cable's shield, effectively cutting off the high-frequency current flowing from the dipole through the cable's shield. In this embodiment, the balun refers to a device or structure that converts the coaxial cable feed to a dipole feed. It is primarily used to reverse the phase of the leakage current through a 1 / 4 wavelength cable at the center frequency of the dipole antenna's preset operating frequency, thereby canceling the ground current and achieving balanced feeding.

[0055] Furthermore, an L-shaped upper balun boss 22 facing the first structure 211 is provided at the upper end of the second structure 212 of the balun 21. The upper balun boss 22 is used to couple in parallel with the balun 21 to provide auxiliary impedance. Its main function is to generate a certain electric field coupling with the stepped coupling plate 30. The electric field coupling, the induced inductance of the upper balun boss 22 itself, and the phase of the current generated when the signal is fed in form a conducted resonant impedance. The conducted resonant impedance will eventually couple in parallel with the balun 21 to form a 50Ω pure impedance. Its fundamental function is to provide auxiliary impedance for the balun 21 to achieve the 50Ω pure impedance specification.

[0056] In addition, the dipole main radiating unit 20 further includes two parts: a first branch 23 and a second branch 24. The first branch 23 and the second branch 24 serve as two branches of the dipole main radiating unit 20, and therefore, the first branch 23 and the second branch 24 are arranged in an approximately symmetrical wedge-shaped structure. Figure 2As shown, the first branch 23 and the second branch 24 are arranged on both sides of the balun 21. The first branch 23 is connected to the upper end of the first structure 211 of the balun 21, and the second branch 24 is connected to the upper end of the upper boss 22 of the balun on the second structure 212. It is understood that when the first branch 23 and the second branch 24 are specifically set, the first branch 23 and the second branch 24 can be exactly the same or approximately the same, and the embodiments of this application do not limit this.

[0057] like Figure 3 The diagram shows a schematic representation of the back structure of the dipole antenna device. The back of the device includes the stepped coupling plate 30 and the parasitic slot 40. The stepped coupling plate 30 is symmetrical about its center and employs a three-layer gradient structure, defined as a first-level coupling plate 31, a second-level coupling plate 32, and a third-level coupling plate 33. It is understood that in this embodiment, the metal layer on the back where the stepped coupling plate 30 and the parasitic slot 40 are located is made of copper. The specific material used can be determined according to actual conditions, and this embodiment does not limit this.

[0058] Specifically, the stepped coupling plate 30 forms a two-stage coupled parasitic current path by coupling the ground current flowing on the two walls of the balun 21 on the dipole main radiating unit 20. Its coupling principle is similar to the frequency resonance relationship of an open-circuit transmission line. The first-stage coupling plate 31, the second-stage coupling plate 32, and the third-stage coupling plate 33 adopt a three-layer gradient structure. The first-stage coupling plate 31 is located at the bottom and is a long strip structure with both ends set as rising wedges. The purpose of the rising wedge shape is to increase the size in the vertical direction and shorten the size in the horizontal direction, thereby reducing the length of the rising first-stage coupling plate 31 and adjusting the impedance generated by the first-stage coupling plate. The second-stage coupling plate 32 is located in the middle and is a long strip structure; the third-stage coupling plate 33 is located at the top and is a long strip structure. The length of the first-stage coupling plate 31 is greater than the length of the second-stage coupling plate 32, and the length of the second-stage coupling plate 32 is greater than the length of the third-stage coupling plate 33. Specifically, the first-stage coupling plate 31 resonates at the lower limit of the preset operating frequency of the dipole antenna, the second-stage coupling plate 32 resonates at the center frequency of the preset operating frequency of the dipole antenna, and the third-stage coupling plate 33 resonates at the upper limit of the preset operating frequency of the dipole antenna.

[0059] For example, if the preset operating frequency of the dipole antenna in this embodiment is 5GHz-5.8GHz, then the first-stage coupling plate 31 resonates at 5GHz, the second-stage coupling plate 32 resonates at 5.4GHz, and the third-stage coupling plate 33 resonates at 5.8GHz. If the preset operating frequency of the dipole antenna in this embodiment is 8GHz-9GHz, then the first-stage coupling plate 31 resonates at 8GHz, the second-stage coupling plate 32 resonates at 8.5GHz, and the third-stage coupling plate 33 resonates at 9GHz. It is understood that the specific preset operating frequency of the dipole antenna can be determined according to actual conditions, and this embodiment does not limit this.

[0060] By adjusting the vertical height and horizontal width of the first-level coupling plate 31 and the third-level coupling plate 33, the frequency shift of the resonant point can be easily achieved. This resonant point can significantly increase the rate of decline of the antenna curve at the upper limit frequency point of 5GHz and the rate of rise at the lower limit frequency point of 5.8GHz. This change in speed can ensure that the antenna can significantly attenuate and suppress signals outside the frequency range while ensuring that the signal passes through the 5GHz-5.8GHz frequency range without loss.

[0061] Furthermore, the parasitic slot 40 can be configured as a serpentine slot, comprising a left strip slot 41 and a right strip slot 42, with a ridge 43 formed between the left and right strip slots 41 and 42. The upper and lower sidewalls of the ridge 43 extend concave and convex along the width direction of the first structure 211, and the widths of the left and right strip slots 41 and 42 are equal everywhere. The parasitic slot 40 is located in the middle of the stepped coupling plate 30 and is orthogonal to the balun 21 at a 90-degree angle. The length of the parasitic slot 40 corresponds to 1 / 4 wavelength of the center frequency of the preset operating frequency of the dipole antenna. The main function of the parasitic slot 40 is to generate an additional induced inductance to produce conjugate resonance in the stepped coupling plate 30, thereby preventing the occurrence of redundant signal resonance points.

[0062] Figure 4 The frequency response curve is for a conventional dipole antenna device. Figure 5 This is the frequency response curve of the dipole antenna device in the embodiments of this application. From Figure 4 and Figure 5 The curve clearly shows that Figure 4 and Figure 5 Each frequency point is numbered one-to-one. Figure 4 The voltage drops by 5 dB from point 1 to point 2, and by 2.3 dB from point 2 to point 3, corresponding to... Figure 5 The rate of decrease was 6.5 dB from point 1 to point 2, and 3.5 dB from point 2 to point 3, showing a significant increase in the rate of decrease; similarly Figure 4The readings rose 1.1 dB between 4 and 5 PM, and 1.7 dB between 5 and 6 PM, corresponding to... Figure 5 The readings rose by 3.3 dB between 4 and 5 o'clock and by 6.5 dB between 5 and 6 o'clock, showing a significant increase in the rate of increase.

[0063] The comparison shows that the dipole main radiating element 20 and the stepped coupling plate 30 exhibit a significant accelerated descent effect at the lower limit frequency of the preset operating frequency of the dipole antenna, and a significant accelerated rise effect at the upper limit frequency. Therefore, the filtering selectivity of the antenna at both the upper and lower limit frequency points is significantly increased, thereby effectively suppressing interference signals outside the preset operating frequency range.

[0064] The dipole antenna device provided in this application includes a dielectric substrate, a dipole main radiating element, a stepped coupling plate, and a parasitic slot. The dipole main radiating element is located on the front side of the dielectric substrate, while the stepped coupling plate and the parasitic slot are both located on the back side of the dielectric substrate. The dipole main radiating element is used for signal transmission and reception. The stepped coupling plate forms a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating element. The parasitic slot generates conjugate resonance with the stepped coupling plate. This dipole antenna device effectively suppresses interference from specific frequencies on the antenna's transmission and reception performance without affecting its transmission and reception performance within a specified frequency range. This results in a highly selective frequency response and stable omnidirectional radiation characteristics, along with strong anti-interference capabilities.

[0065] Furthermore, the parasitic slot generates additional high-frequency conjugate resonances at the coupled resonant frequency, helping to deepen the resonance depth at high frequencies and optimize the notch filtering efficiency. The presence of these notch resonant frequencies effectively suppresses interference from specific frequencies on the antenna's transmission and reception performance without affecting its transmission and reception performance within the specified frequency range. This ensures that transmitted and received signals pass through the dipole antenna without loss within its preset operating frequency range, while suppressing signals outside the preset operating frequency range.

[0066] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, as an alternative implementation, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0067] In addition, the functional modules or units in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0068] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0069] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A dipole antenna device, characterized in that, The device includes a dielectric substrate, a dipole main radiating unit, a stepped coupling plate, and a parasitic groove. The dipole main radiating unit is located on the front side of the dielectric substrate, the stepped coupling plate and the parasitic groove are both located on the back side of the dielectric substrate, and the parasitic groove is located in the middle of the stepped coupling plate. The dipole main radiating unit is used for signal transmission and reception; The stepped coupling plate is used to form a two-stage coupled parasitic current path with the ground current generated by the dipole main radiating unit. The parasitic groove is used to generate conjugate resonance with the stepped coupling plate.

2. The dipole antenna device according to claim 1, characterized in that, The dipole main radiating unit includes a balun and a balun upper boss. The balun is located in the middle of the main radiating unit of the dipole, and the upper boss of the balun is located at the upper end of the balun.

3. The dipole antenna device according to claim 2, characterized in that, The balun is perpendicular to and orthogonal to the dipole main radiating unit, forming a U-shaped structure. The U-shaped structure includes a strip-shaped first structure, a strip-shaped second structure, and a strip-shaped third structure. The first structure is parallel to the second structure, and the third structure is perpendicular to the first structure; The first structure and the second structure are located on both sides of the third structure, and are respectively connected to the opposite ends of the third structure; The upper end of the second structure is provided with the upper boss of the balun.

4. The dipole antenna device according to claim 1, characterized in that, The stepped coupling plate includes a first-level coupling plate, a second-level coupling plate, and a third-level coupling plate; The first-stage coupling plate resonates at the lower limit of the preset operating frequency of the dipole antenna; The secondary coupling plate resonates at the center frequency of the preset operating frequency of the dipole antenna; The three-stage coupling plate resonates at the upper limit of the preset operating frequency of the dipole antenna.

5. The dipole antenna device according to claim 4, characterized in that, The primary coupling plate, the secondary coupling plate, and the tertiary coupling plate adopt a three-stage gradient structure, with the primary coupling plate located at the bottom, the secondary coupling plate located in the middle, and the tertiary coupling plate located at the top; wherein, the length of the primary coupling plate is greater than the length of the secondary coupling plate, and the length of the secondary coupling plate is greater than the length of the tertiary coupling plate.

6. The dipole antenna device according to claim 3, characterized in that, The parasitic groove is shaped like a snake and is arranged at a 90-degree angle to the balun.

7. The dipole antenna device according to claim 3, characterized in that, The length of the parasitic slot corresponds to 1 / 4 wavelength of the center frequency point of the preset operating frequency of the dipole antenna.

8. The dipole antenna device according to claim 1, characterized in that, The dipole main radiating unit is centrally symmetrical with the stepped coupling plate.

9. The dipole antenna device according to claim 2, characterized in that, The depth of the slot in the middle of the balun corresponds to 1 / 4 of the length of the center frequency of the preset operating frequency of the dipole antenna.

10. A communication device, characterized in that, Includes the dipole antenna device as described in any one of claims 1-9.

Images