Dipole antenna

Abstract

The utility model relates to the technical field of antennas, and provides a dipole antenna which comprises a substrate, a feed unit, a grounding unit, a coaxial wire, a transmission medium and a radiator, the substrate is provided with a top surface and a bottom surface, the feed unit is arranged on the top surface, the grounding unit is arranged on the bottom surface, the coaxial wire is provided with a first end and a second end, the first end is electrically connected with the feed unit, and the second end is electrically connected with the transmission medium. The second end is electrically connected with the grounding unit; the transmission medium comprises an odd number of transmission sub-parts, each transmission sub-part comprises an odd number of transmission sections which are sequentially connected along the transmission direction, the transmission section at the initial position of each transmission sub-part is connected to the feed-in point or the feed-in point, and the widths of the transmission sections are different; the number of the radiators corresponds to that of the transmission sub-parts, one end of each radiator is connected to the transmission section at the tail end of the corresponding transmission sub-part, and the other end of each radiator extends towards the edge of the substrate. The dipole antenna can meet the requirements of wider frequency bandwidth and larger radiation gain at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular provides a dipole antenna. Background Art

[0002] As people's requirements for communication quality and integration of communication equipment continue to increase. As a sub-component of communication equipment, antennas also need higher performance to meet the needs of communication systems. The penetration rate of various mobile terminal devices in society is increasing very fast. Among them, the most convenient and fastest way is wireless access, because wireless access saves a lot of network laying costs, can be quickly planned, installed, and put into use, and maintenance is relatively simple.

[0003] However, conventional dipole antennas have the problems of narrow frequency bandwidth and low radiation gain. Utility Model Content

[0004] The utility model aims to provide a dipole antenna, aiming to solve the problems of narrow frequency bandwidth and low radiation gain of the existing dipole antenna.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The present application provides a dipole antenna, including:

[0007] A substrate having a top surface and a bottom surface that are oppositely disposed;

[0008] A feeding unit, wherein the feeding unit is arranged on the top surface;

[0009] A grounding unit, the grounding unit being arranged on the bottom surface;

[0010] A coaxial wire, the coaxial wire having a first end and a second end arranged opposite to the first end, the first end being electrically connected to the feeding unit to form a feeding point, and the second end being electrically connected to the grounding unit to form a feeding point;

[0011] A transmission medium, wherein the number of the transmission medium is two and the transmission medium is respectively arranged on the top surface and the bottom surface, the transmission medium comprises an odd number of transmission sub-sections, the transmission sub-sections comprise an odd number of transmission segments connected in sequence along a transmission direction, the transmission segment at the starting position of each of the transmission sub-sections is connected to the feeding point or the feeding point, and the widths of the transmission segments are different;

[0012] Radiators, the number of which corresponds to the number of the transmission sub-sections and are respectively arranged on the top surface and the bottom surface, one end of the radiator is connected to the transmission segment at the end position of the transmission sub-section, and the other end of the radiator extends toward the edge of the substrate.

[0013] Beneficial effects of the utility model: The dipole antenna provided by the utility model has radiators and transmission media compatible therewith arranged on the top and bottom surfaces of the substrate, and is fed by the first end of the coaxial wire to the feeding unit, and the second end of the coaxial wire is electrically connected to the grounding unit, thereby forming a loop structure, providing a feeding signal for the antenna as a whole, and generating electromagnetic radiation. Furthermore, the feeding signal is transmitted to the corresponding radiator through the transmission medium. Since the widths of the various transmission segments of the transmission medium are different, that is, the impedances of the various segments are different, the impedance matching can be adjusted to a certain extent, the antenna standing wave can be improved, and the bandwidth can be expanded; at the same time, the provision of multiple radiators can increase the gain in the maximum radiation direction of the antenna to a certain extent. In this way, the dipole antenna provided in the embodiment of the present application can simultaneously meet the requirements of wider frequency bandwidth and greater radiation gain.

[0014] In some embodiments, the sum of the lengths of the transmission segments is equal to one-Nth wavelength of the center frequency of the dipole antenna, where N is an even number.

[0015] In some embodiments, the radiator includes a first radiating sub-section and a second radiating sub-section connected to the first radiating sub-section at one end, wherein one end of the first radiating sub-section is connected to the transmission segment at the end position of the transmission sub-section, and one end of the second radiating sub-section extends toward the edge of the substrate away from the first radiating sub-section.

[0016] In some embodiments, the length of the first radiation sub-portion and / or the length of the second radiation sub-portion is equal to one-Mth wavelength of the center frequency of the dipole antenna, where M is an even number.

[0017] In some embodiments, the dipole antenna also includes patch bodies, the number of the patch bodies is the same as the number of the first radiating sub-sections, each of the patch bodies is located at an edge of the substrate and corresponds to the first radiating sub-section, and each of the patch bodies is located between two adjacent first radiating sub-sections.

[0018] In some embodiments, a concave portion is formed on the patch body, and a convex portion corresponding to the concave portion is formed on the first radiation sub-portion.

[0019] In some embodiments, the feeding point is located at the geometric center of the substrate, and the feeding point and the feeding point are mirror-imaged on the top surface and the bottom surface; each of the transmission sub-units, the radiator and the patch body are mirror-imaged on the top surface and the bottom surface.

[0020] In some embodiments, on the top surface or the bottom surface of the substrate, the number of the transmission media, the number of the radiators, and the number of the patch bodies are all three, the extension direction of the transmission medium is the same as the radial direction of the substrate, and the angles between the extension directions of two adjacent transmission media are the same, and each patch body is located in the extension direction of the transmission medium.

[0021] In some embodiments, the number of the transmission segments is three. In the same transmission sub-section, the width of the transmission segment at the starting position gradually decreases along the extension direction; the width of the transmission segment at the middle position remains unchanged; and the width of the transmission segment at the end position gradually decreases along the extension direction.

[0022] In some embodiments, in the same radiator, an end of the first radiating sub-portion away from the transmission segment and an end of the second radiating sub-portion away from the first radiating sub-portion both extend toward the circumferential direction of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0024] Figure 1 A front view of the dipole antenna provided by an embodiment of the utility model from the top surface perspective;

[0025] Figure 2 Another front view of the dipole antenna provided by the embodiment of the utility model from the top surface perspective;

[0026] Figure 3 A left side view of a dipole antenna provided by an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of simulation results of a dipole antenna S11 provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the results of a 3D directional pattern simulation of a dipole antenna provided in an embodiment of the present application;

[0029] Figure 6 Another schematic diagram of the results of the 3D radiation pattern simulation of the dipole antenna provided in an embodiment of the present application.

[0030] Among them, the reference numerals in the figure are:

[0031] 10. substrate; 10a. top surface; 10b. bottom surface;

[0032] 20. Feed unit;

[0033] 30. Grounding unit;

[0034] 40. Coaxial wire;

[0035] 50, transmission medium; 51, transmission subunit; 511, transmission segment;

[0036] 60. radiator; 61. first radiating sub-portion; 62. second radiating sub-portion; 63. convex portion;

[0037] 70. Patch body; 71. Concave part. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 or an electrical connection; 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.

[0042] Please refer to Figures 1 to 3 An embodiment of the present application provides a dipole antenna including a substrate 10 , a feeding unit 20 , a grounding unit 30 , a coaxial wire 40 , a transmission medium 50 and a radiator 60 .

[0043] Among them, the substrate 10 is the carrier part of the dipole antenna, which is used to carry other components. Here, the substrate 10 should be a plate-like structure, that is, a thin structure, which is conducive to reducing the height of the antenna, presenting a low-profile structural form, and is conducive to the miniaturization of the antenna design. At the same time, the outer contour of the substrate 10 includes but is not limited to a circle, a square, a rectangle, a triangle, a diamond, etc. The substrate 10 has a top surface 10a and a bottom surface 10b that are arranged opposite to each other. Here, the top surface 10a and the bottom surface 10b are two opposite end surfaces. It is generally believed that in the use state, the bottom surface 10b is the end surface that contacts or corresponds to the placement table, and the top surface 10a is the end surface away from the placement table. And, the substrate 10 can also be called a dielectric board, which is usually a PCB substrate 10 formed by a composite of glass fiber fabric and epoxy resin, or an FPC substrate 10 with polyimide or polyester film as the base material, or a substrate 10 made of a high thermal conductivity material such as ceramic.

[0044] The feed unit 20 is disposed on the top surface 10a; the ground unit 30 is disposed on the bottom surface 10b. The feed unit 20 can be a feed line, a distributor, a combiner, etc.; the ground unit 30 can be a ground line, a ground plate, a ground ring, etc. The feed unit 20 and the ground unit 30 are respectively disposed on two opposite end surfaces of the substrate 10.

[0045] The coaxial wire 40 , also called a coaxial cable, is used to transmit radio frequency signals, video signals, high-frequency data, etc. It can be understood that the coaxial wire 40 is in a cable shape, and thus, the coaxial wire 40 has a first end and a second end arranged opposite to the first end, the first end is electrically connected to the feeding unit 20 to form a feeding point, and the second end is electrically connected to the grounding unit 30 .

[0046] The transmission medium 50 is used to transmit the radio frequency signal of the coaxial wire 40 to the corresponding radiator 60. Here, there are two transmission media 50 and they are respectively arranged on the top surface 10a and the bottom surface 10b, that is, the transmission medium 50 is arranged on both end surfaces of the substrate 10 for signal transmission to the corresponding radiator 60.

[0047] The transmission medium 50 includes an odd number of transmission sub-sections 51, and the transmission sub-sections 51 include an odd number of transmission segments 511 connected in sequence along the transmission direction. The transmission segment 511 at the start of each transmission sub-section 51 is connected to a feeding point or a feeding point, and the widths of each transmission segment 511 are different. Here, an odd number of transmission segments 511 is more conducive to signal transmission, and the transmission segment 511 at the start of each transmission sub-section 51 is connected to a feeding point or a feeding point, so as to achieve the same signal of the coaxial wire 40 being transmitted to the corresponding radiator 60.

[0048] The number of radiators 60 corresponds to the number of transmission sub-sections 51 and are respectively arranged on the top surface 10a and the bottom surface 10b. Here, the radiators 60 are also arranged on the bottom surface 10b and the top surface 10a of the substrate 10, and their number is the same as the number of transmission sub-sections 51 on the same end surface of the substrate 10. At this time, one end of the radiator 60 is connected to the transmission segment 511 at the end position of the corresponding transmission sub-section 51, and the other end of the radiator 60 extends toward the edge of the substrate 10 to radiate signals outward.

[0049] The dipole antenna provided by the utility model has a radiator 60 and a transmission medium 50 adapted thereto disposed on the top surface 10a and the bottom surface 10b of the substrate 10, and the first end of the coaxial wire 40 is fed by the feeding unit 20, and the second end of the coaxial wire 40 is electrically connected to the grounding unit 30, thereby forming a loop structure, providing a feeding signal for the antenna as a whole, and generating electromagnetic radiation. Furthermore, the feeding signal is transmitted to the corresponding radiator 60 through the transmission medium 50. Since the widths of the transmission segments 511 of the transmission medium 50 are different, that is, the impedances of the segments are different, the impedance matching can be adjusted to a certain extent, the antenna standing wave can be improved, and the bandwidth can be expanded; at the same time, the setting of multiple radiators 60 can increase the gain in the maximum radiation direction of the antenna to a certain extent. In this way, the dipole antenna provided in the embodiment of the present application can simultaneously meet the requirements of wider frequency bandwidth and greater radiation gain.

[0050] Please refer to Figure 2 In some embodiments, the sum of the lengths of the transmission segments 511 is equal to one-Nth wavelength of the center frequency of the dipole antenna, where N is an even number.

[0051] It can be understood that N can be two, four, six, eight, etc. The length of each transmission segment 511 refers to the length in the extension direction of the transmission sub-section 51, that is, the total length of the transmission sub-section 51, as shown in 2. What is shown in the figure is the sum L of the lengths of each transmission segment 511.

[0052] Optionally, when the sum of the lengths of the transmission segments 511 is equal to one quarter wavelength of the center frequency of the dipole antenna, and the widths of the transmission segments 511 are different, the impedance matching of the transmission medium 50 can be adjusted to improve the antenna standing wave and expand the bandwidth.

[0053] Please refer to Figure 1 In some embodiments, the radiator 60 includes a first radiating sub-section 61 and a second radiating sub-section 62 connected to the first radiating sub-section 61 at one end, one end of the first radiating sub-section 61 is connected to the transmission segment 511 at the end of the transmission sub-section 51, and the second radiating sub-section 62 extends toward the edge of the substrate 10 at one end away from the first radiating sub-section 61.

[0054] It can be understood that the radiator 60 is divided into two parts, a first radiating sub-section 61 and a second radiating sub-section 62, and the shape structure of the combination of the two is similar to a "Y" or "U" shape, that is, one end of the radiator 60 as a whole is closed and connected to the transmission section 511, and the other end is forked. This is beneficial to lengthen the movement path of the surface current on the radiator 60, thereby effectively reducing the length of the radiation unit, thereby enabling the antenna to be miniaturized.

[0055] Please refer to Figure 1 In some embodiments, the length of the first radiating sub-portion 61 and / or the length of the second radiating sub-portion 62 is equal to one-Mth wavelength of the center frequency of the dipole antenna, where M is an even number.

[0056] It can be understood that M can be two, four, six, eight, etc. The length of the first radiation sub-portion 61 refers to the length of the outer edge of the outer contour of the first radiation sub-portion 61. Figure 1 The length of the second radiation sub-portion 62 refers to the length of the outer edge of the outer contour of the second radiation sub-portion 60, as shown in FIG. Figure 1 Indicated by the green line segment.

[0057] Optionally, the length of the first radiation sub-portion 61 and the length of the second radiation sub-portion 62 are both equal to a quarter wavelength of the center frequency of the dipole antenna, so as to meet the gain of the antenna in the maximum radiation direction.

[0058] Please refer to Figure 1 In some embodiments, the dipole antenna further includes a patch body 70 , the number of the patch bodies 70 is the same as the number of the first radiating sub-sections 61 , each patch body 70 is located at an edge of the substrate 10 and corresponds to the first radiating sub-section 61 , and each patch body 70 is located between two adjacent first radiating sub-sections 61 .

[0059] It can be understood that the patch body 70 is also arranged on the two opposite end surfaces of the substrate 10 (the top surface 10a and the bottom surface 10b). The function of the patch body 70 is to form an isolation effect between the first radiating sub-sections 61 of two adjacent radiators 60 to reduce the probability of coupling between the first radiating sub-sections 61 of two adjacent radiators 60, and can further weaken the coupling strength between the dipoles, thereby improving the standing wave and radiation pattern of the antenna.

[0060] Here, the shape of the patch body 70 is not limited. For example, the shape of the patch body 70 can be a strip, a square, an arc, etc.

[0061] Please refer to Figure 1 In some embodiments, a concave portion 71 is formed on the patch body 70 , and a convex portion 63 corresponding to the concave portion 71 is formed on the first radiation sub-portion 61 .

[0062] It can be understood that the coupling strength between the patch body 70 and the first radiation sub-part 61 is increased by adding the concave portion 71 and the convex portion 63 .

[0063] Here, the concave portion 71 may be a groove, a tooth groove, a notch, etc. formed at the outer edge of the body patch body 70 . Similarly, the convex portion 63 may be a convex column, a convex rib, etc. protruding from the outer edge of the first radiation sub-portion 61 .

[0064] Optionally, as shown in the figure, the concave portion 71 is a notch formed on the patch body 70, the convex portion 63 is a convex column protruding from the first radiation sub-portion 61, and the contour shape of the notch is matched with the contour shape of the convex column.

[0065] Please refer to Figure 1 and Figure 2 In some embodiments, the feeding point is located at the geometric center of the substrate 10, and the feeding point and the feeding ground are mirror-imaged on the top surface 10a and the bottom surface 10b; each transmission sub-unit 51, the radiator 60 and the patch body 70 are mirror-imaged on the top surface 10a and the bottom surface 10b.

[0066] It can be understood that the geometric center of the substrate 10 refers to the center, center of gravity or center of the substrate 10. For example, if the substrate 10 is a circular substrate 10, then its geometric center is the center of the circular substrate 10, that is, the feeding point and the feeding point are respectively placed on the center of the top surface 10a and the bottom surface 10b.

[0067] Furthermore, the transmission sub-units 51, the radiator 60 and the patch body 70 are all arranged in a mirror-image manner on the top surface 10a and the bottom surface 10b, which can facilitate the synchronization of the outward radiation of signals from the two opposite end surfaces of the antenna.

[0068] Specifically, please refer to Figures 1 to 3In some embodiments, on the top surface 10a or the bottom surface 10b of the substrate 10, the number of transmission sub-sections 51, the number of radiators 60, and the number of patch bodies 70 are all three, the extension direction of the transmission sub-section 51 is the same as the radial direction of the substrate 10, and the angles between the extension directions of two adjacent transmission sub-sections 51 are the same, and each patch body 70 is located in the extension direction of the transmission sub-section 51.

[0069] It can be understood that the number of transmission sub-sections 51, the number of radiators 60 and the number of patch bodies 70 are all three, that is, while ensuring the quality and efficiency of signal transmission, the overall size of the antenna is smaller.

[0070] Here, the angle between the extension directions of two adjacent transmission sub-sections 51 is 120°.

[0071] Please refer to Figure 2 In some embodiments, the number of transmission segments 511 is three. In the same transmission sub-section 51, the width of the transmission segment 511 at the starting position gradually decreases along the extension direction; the width of the transmission segment 511 at the middle position remains unchanged; and the width of the transmission segment 511 at the end position gradually decreases along the extension direction.

[0072] It can be understood that in the same transmission sub-section 51 , the widths of the three transmission sections 511 may be different, so that the impedances of the transmission sections 511 are different.

[0073] Here, the width of each transmission segment 511 is the distance between two edge sides in a direction perpendicular to the extension direction of the transmission sub-section 51 .

[0074] Please refer to Figure 1 In some embodiments, in the same radiator 60 , an end of the first radiating sub-portion 61 away from the transmission section 511 and an end of the second radiating sub-portion 62 away from the first radiating sub-portion 61 both extend in the circumferential direction of the substrate 10 .

[0075] It can be understood that based on the overall "Y" shape or "U" shape of the radiator 60, by extending it in the circumferential direction of the substrate 10, the length of the first radiating sub-section 61 and the second radiating sub-section 62 can be increased, thereby increasing the overall radiation area of ​​the radiator 60 and improving the radiation efficiency.

[0076] Please refer to Figures 1 to 6 , Figure 1 A front view of the dipole antenna provided in an embodiment of the present application from a top surface perspective; Figure 4 A schematic diagram of simulation results of a dipole antenna S11 provided in an embodiment of the present application; Figure 5 A schematic diagram of the results of a 3D directional pattern simulation of a dipole antenna provided in an embodiment of the present application; Figure 6Another result schematic diagram of the 3D pattern simulation of the dipole antenna provided in the embodiment of the present application. In a specific embodiment, the dipole antenna includes a substrate 10, a feeding unit 20, a grounding unit 30, a coaxial wire 40, a transmission medium 50, a radiator 60 and a patch body 70.

[0077] The substrate 10 has a top surface 10a and a bottom surface 10b that are arranged opposite to each other, the feeding unit 20 is arranged on the top surface 10a, the grounding unit 30 is arranged on the bottom surface 10b, and the coaxial wire 40 has a first end and a second end, the first end is electrically connected to the feeding unit 20 to form a feeding point, and the second end is electrically connected to the grounding unit 30 to form a feeding point.

[0078] Furthermore, the feeding point is located at the geometric center of the substrate 10, and the feeding point and the feeding ground are mirror-imaged on the top surface 10a and the bottom surface 10b; each transmission sub-unit 51, the radiator 60 and the patch body 70 are mirror-imaged on the top surface 10a and the bottom surface 10b.

[0079] There are two transmission media 50, and the transmission medium 50 includes three transmission sub-sections 51. The extension direction of the transmission sub-section 51 is the same as the radial direction of the substrate 10, and the angles between the extension directions of two adjacent transmission sub-sections 51 are the same. The transmission sub-section 51 includes three transmission segments 511 connected in sequence along the transmission direction. The transmission segment 511 at the starting position of each transmission sub-section 51 is connected to the feeding point or the feeding point, and the width of each transmission segment 511 is different. In the same transmission sub-section 51, the width of the transmission segment 511 at the starting position gradually decreases along the extension direction; the width of the transmission segment 511 at the middle position remains unchanged; and the width of the transmission segment 511 at the end position gradually decreases along the extension direction.

[0080] The number of radiators 60 corresponds to the number of transmission sub-sections 51, one end of the radiator 60 is connected to the transmission segment 511 at the terminal position of the transmission sub-section 51, and the other end of the radiator 60 extends toward the edge of the substrate 10. The radiator 60 includes a first radiator sub-section 61 connected to each other and a second radiator sub-section 62 connected to the first radiator sub-section 61 at one end, one end of the first radiator sub-section 61 is connected to the transmission segment 511 at the terminal position of the transmission sub-section 51, and one end of the second radiator sub-section 62 away from the first radiator sub-section 61 extends toward the edge of the substrate 10.

[0081] The number of the patch bodies 70 is the same as the number of the first radiation sub-portions 61 . Each patch body 70 is located at the edge of the substrate 10 and corresponds to a first radiation sub-portion 61 . Furthermore, each patch body 70 is located between two adjacent first radiation sub-portions 61 .

[0082] A concave portion 71 is formed on the patch body 70 , and a convex portion 63 corresponding to the concave portion 71 is formed on the first radiating sub-portion 61 .

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dipole antenna, characterized in that: include: A substrate having a top surface and a bottom surface that are oppositely disposed; A feeding unit, wherein the feeding unit is arranged on the top surface; A grounding unit, the grounding unit being arranged on the bottom surface; A coaxial wire, the coaxial wire having a first end and a second end arranged opposite to the first end, the first end being electrically connected to the feeding unit to form a feeding point, and the second end being electrically connected to the grounding unit to form a feeding point; A transmission medium, wherein the number of the transmission medium is two and the transmission medium is respectively arranged on the top surface and the bottom surface, the transmission medium comprises an odd number of transmission sub-sections, the transmission sub-sections comprise an odd number of transmission segments connected in sequence along a transmission direction, the transmission segment at the starting position of each of the transmission sub-sections is connected to the feeding point or the feeding point, and the widths of the transmission segments are different; Radiators, the number of which corresponds to the number of the transmission sub-sections and are respectively arranged on the top surface and the bottom surface, one end of the radiator is connected to the transmission segment at the end position of the transmission sub-section, and the other end of the radiator extends toward the edge of the substrate.

2. The dipole antenna according to claim 1, characterized in that: The sum of the lengths of the transmission segments is equal to one-Nth wavelength of the center frequency of the dipole antenna, where N is an even number.

3. The dipole antenna according to claim 1, characterized in that: The radiator includes a first radiating sub-section and a second radiating sub-section connected to the first radiating sub-section at one end, wherein one end of the first radiating sub-section is connected to the transmission segment at the terminal position of the transmission sub-section, and one end of the second radiating sub-section is away from the first radiating sub-section and extends toward the edge of the substrate.

4. The dipole antenna according to claim 3, characterized in that: The length of the first radiation sub-portion and / or the length of the second radiation sub-portion is equal to one-Mth wavelength of the central frequency of the dipole antenna, where M is an even number.

5. The dipole antenna according to claim 3, characterized in that: The dipole antenna also includes patch bodies, the number of which is the same as the number of the first radiating sub-parts, each of the patch bodies is located at the edge of the substrate and corresponds to the first radiating sub-part, and each of the patch bodies is located between two adjacent first radiating sub-parts.

6. The dipole antenna according to claim 5, characterized in that: The patch body is provided with a concave portion, and the first radiation sub-portion is provided with a convex portion corresponding to the concave portion.

7. The dipole antenna according to claim 5, characterized in that: The feeding point is located at the geometric center of the substrate, and the feeding point and the feeding point are mirror-imaged on the top surface and the bottom surface; each of the transmission sub-units, the radiator and the patch body are mirror-imaged on the top surface and the bottom surface.

8. The dipole antenna according to claim 7, characterized in that: On the top surface or the bottom surface of the substrate, the number of the transmission sub-sections, the number of the radiators, and the number of the patch bodies are all three, the extension direction of the transmission sub-section is the same as the radial direction of the substrate, and the angles between the extension directions of two adjacent transmission sub-sections are the same, and each patch body is located in the extension direction of the transmission sub-section.

9. The dipole antenna according to claim 8, characterized in that: The number of the transmission segments is three. In the same transmission sub-section, the width of the transmission segment at the starting position gradually decreases along the extension direction; the width of the transmission segment at the middle position remains unchanged; and the width of the transmission segment at the end position gradually decreases along the extension direction.

10. The dipole antenna according to claim 8, characterized in that: In the same radiator, an end of the first radiating sub-portion away from the transmission section and an end of the second radiating sub-portion away from the first radiating sub-portion both extend toward the circumferential direction of the substrate.

Images