A dipole antenna and a communication device

Abstract

The embodiment of the present application relates to the technical field of communication, and discloses a dipole antenna and a communication device, which comprise a first dielectric substrate, a first antenna unit, a coaxial line, a second antenna unit and a choke structure; the first antenna unit is arranged on the first dielectric substrate; one end of the coaxial line is arranged on the first dielectric substrate, and the other end of the coaxial line extends out of the first dielectric substrate; the one end of the coaxial line on the first dielectric substrate is provided with a first connecting part and a second connecting part; the second antenna unit is arranged on the first dielectric substrate; the first connecting part is electrically connected with the first antenna unit; the second connecting part is electrically connected with the second antenna unit; and the choke structure comprises a first LC resonant circuit, and the first LC resonant circuit is electrically connected with one side of the part of the coaxial line extending out of the first dielectric substrate. Through the above mode, the embodiment of the present application can reduce the cost and has the characteristics of small size and light weight of the dipole antenna.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to a dipole antenna and a communication device. Background Technology

[0002] Dipole antennas are the oldest type of antenna, also known as symmetrical dipoles, consisting of positive and negative dipoles of the same size (their length is typically 1 / 4 of the antenna's operating wavelength). The characteristic parameters of dipole antennas are easy to calculate. Their main technical advantages are: simple structure, low cost of manufacture, and omnidirectional radiation characteristics. They are widely used in broadcasting, mobile networks, military communications, satellite communications, and other fields. An antenna system includes the antenna and the feed line, collectively called the antenna-feed system. The antenna-feed system for a dipole antenna typically consists of a balun and a coaxial cable.

[0003] In implementing these embodiments, the inventors of this invention discovered that conventional dipole antennas suffer from a significant discrepancy between actual antenna radiation and simulation results due to the introduction of a coaxial line at the feed end. In real-world applications, coaxial lines often experience electromagnetic wave radiation and reception due to surface current leakage or insufficient copper in the ground plane, resulting in a feed line antenna effect. This coaxial line antenna effect further impacts the dipole antenna's overall performance. Traditional choke structures thicken the metal wall of the coaxial line to contact the ground plane, eliminating surface current. However, this increases the overall antenna size, hindering miniaturization. Furthermore, the copper-based metal wall increases the copper content, raising the cost of the dipole antenna. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a dipole antenna and a communication system. By setting a choke structure, a first LC resonant circuit of the choke structure, and the first LC resonant circuit being electrically connected to one side of the portion of the coaxial line extending out of the first dielectric substrate, the choke structure can eliminate the surface current of the coaxial line without thickening the metal wall of the coaxial line, thereby reducing costs and making the dipole antenna small and lightweight.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this embodiment of the invention is: providing a dipole antenna, including a first dielectric substrate, a first antenna element, a coaxial line, a second antenna element, and a choke structure; the first antenna element is disposed on the first dielectric substrate; one end of the coaxial line is disposed on the first dielectric substrate, and the other end of the coaxial line extends out of the first dielectric substrate, and a first connecting portion and a second connecting portion are provided at one end of the coaxial line located on the first dielectric substrate; the second antenna element is disposed on the first dielectric substrate, the first connecting portion is electrically connected to the first antenna element, and the second connecting portion is electrically connected to the second antenna element; the choke structure includes a first LC resonant circuit, and the first LC resonant circuit is electrically connected to one side of the portion of the coaxial line extending out of the first dielectric substrate.

[0006] Optionally, the first LC resonant circuit includes a second dielectric substrate, an inductor, and a capacitor. The capacitor is disposed on the second dielectric substrate, and the two ends of the inductor are electrically connected to the capacitor and one side of the portion of the coaxial line extending out of the first dielectric substrate, respectively.

[0007] Optionally, the capacitor includes a first metal plate and a first ground plate, the first metal plate and the first ground plate being disposed at a distance from each other on the second dielectric substrate, one end of the inductor being electrically connected to one side of the portion of the coaxial line extending out of the first dielectric substrate, and the other end of the inductor being connected to the first metal plate.

[0008] Optionally, there are multiple first LC resonant circuits, which are arranged sequentially at intervals along one end of the coaxial line to the other end, and the first ground plane of the multiple first LC resonant circuits is integrally formed.

[0009] Optionally, the choke structure further includes a second LC resonant circuit, which is electrically connected to the other side of the portion of the coaxial line extending from the first dielectric substrate.

[0010] Optionally, the second LC resonant circuit includes a second inductor and a second capacitor, the second capacitor being disposed on the second dielectric substrate, and the two ends of the second inductor being connected to the second capacitor and one side of the portion of the first dielectric substrate extending from the coaxial line, respectively.

[0011] Optionally, the second capacitor includes a second metal plate and a second ground plate, which are disposed at a distance from each other on the second dielectric substrate. One end of the second inductor is electrically connected to the side of the coaxial line extending out of the first dielectric substrate, and the other end of the second inductor is connected to the second metal plate.

[0012] Optionally, there are multiple second LC resonant circuits, which are arranged sequentially at intervals along one end of the coaxial line to the other end, and the second ground plane of the multiple second LC resonant circuits is integrally formed.

[0013] Optionally, the coaxial line includes an outer conductor, an insulator, and a coaxial core. The insulator surrounds the coaxial core, the outer conductor covers the coaxial core, and one end of the coaxial core extends out of the insulator and the outer conductor. The first connecting portion and the second connecting portion are disposed at one end of the coaxial core, and the first LC resonant circuit and the second LC resonant circuit are connected to both sides of the portion of the outer conductor extending out of the first dielectric substrate.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of the present invention is to provide a communication device, including the dipole antenna described in any of the above-mentioned claims.

[0015] This invention provides a dipole antenna, including a first dielectric substrate, a first antenna element, a coaxial line, a second antenna element, and a choke structure. The first and second antenna elements are both disposed on the first dielectric substrate. One end of the coaxial line is connected to the first antenna element, and the other end is connected to the second antenna element, with the other end extending beyond the first dielectric substrate. The choke structure includes a first LC resonant circuit electrically connected to one side of the portion of the coaxial line extending beyond the first dielectric substrate. The choke structure can eliminate surface current on the coaxial line without thickening the metal wall of the coaxial line, thus reducing costs and providing the dipole antenna with a small and lightweight design. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in specific embodiments of the present invention or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of a dipole antenna according to an embodiment of the present invention;

[0018] Figure 2 This is an exploded view of the dipole antenna according to an embodiment of the present invention;

[0019] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Dipole antenna; 10. First dielectric substrate; 20. First antenna element; 30. Coaxial cable; 301. First connecting part; 302. Second connecting part; 303. Outer conductor; 304. Insulator; 40. Second antenna element; 50. Choke structure; 501. First LC resonant circuit; 511. Second dielectric substrate; 512. Inductor; 513. Capacitor; 514. First metal sheet; 515. First grounding piece; 502. Second LC resonant circuit; 521. Second inductor; 522. Second capacitor; 523. Second metal sheet; 524. Second grounding piece. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate orientation or positional relationships based on the orientation or positional relationships 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Please see Figure 1The dipole antenna 100 includes: a first dielectric substrate 10, a first antenna element 20, a coaxial line 30, a second antenna element 40, and a choke structure 50. The first antenna element 20 and the second antenna element 40 are both disposed on the first dielectric substrate 10. One end of the coaxial line 30 is connected to the first antenna element 20, and the other end of the coaxial line 30 is connected to the second antenna element 40, with the other end extending out of the first dielectric substrate 10. The choke structure 50 includes a first LC resonant circuit 501, which is electrically connected to the side of the coaxial line 30 extending out of the first dielectric substrate 10. By providing the first LC resonant circuit 501 and connecting it to the coaxial line 30, the current on the outer surface of the coaxial line 30 is eliminated, and there is no need to thicken the metal wall of the coaxial line 30, reducing the use of copper and achieving cost reduction.

[0026] Please see Figure 2 and Figure 3 The first LC resonant circuit 501 further includes a second dielectric substrate 511, an inductor 512, and a capacitor 513. The capacitor 513 is disposed on the second dielectric substrate 511. The two ends of the inductor 512 are electrically connected to the capacitor 513 and one side of the portion of the coaxial line 30 extending out of the first dielectric substrate 10, respectively. The capacitor 513 includes a first metal plate 514 and a first ground plate 515, which are disposed at intervals on the second dielectric substrate 511. One end of the inductor 512 is electrically connected to one side of the portion of the coaxial line 30 extending out of the first dielectric substrate 10, and the other end of the inductor 512 is connected to the metal plate, thereby loading the capacitor. In some embodiments, there are multiple first LC resonant circuits 501, which are sequentially spaced along one end of the coaxial line 30 towards the other end. The first ground plane of the multiple first LC resonant circuits 501 is integrally formed. In this embodiment, the first ground plate 515 is a metal ground plane.

[0027] Please continue reading. Figure 3The choke structure 50 further includes a second LC resonant circuit 502, which is electrically connected to the other side of the portion of the coaxial line 30 extending from the first dielectric substrate 10. The second LC resonant circuit 502 includes a second inductor 521 and a second capacitor 522. The second capacitor 522 is disposed on the second dielectric substrate 511. The two ends of the second inductor 521 are respectively connected to the second capacitor 522 and one side of the portion of the coaxial line 30 extending from the first dielectric substrate 10. The second capacitor 522 includes a second metal sheet 523 and a second ground sheet 524, which are disposed at a distance from each other on the second dielectric substrate 511. One end of the second inductor 521 is electrically connected to the side of the portion of the coaxial line 30 extending from the first dielectric substrate 10, and the other end of the second inductor 521 is connected to the second metal sheet 523, thus achieving capacitance loading. The number of second LC resonant circuits 502 is multiple, and the multiple second LC resonant circuits 502 are arranged sequentially at intervals along one end of the coaxial line 30 towards the other end of the coaxial line 30. The second grounding plate of the multiple second LC resonant circuits 502 is integrally formed. In this embodiment of the invention, the second grounding piece 524 is a metal ground plate.

[0028] Please continue reading. Figure 2 and Figure 3 The coaxial line 30 is provided with a first connecting portion 301 and a second connecting portion 302 at one end of the first dielectric substrate 10; the first connecting portion 301 is electrically connected to the first antenna unit 20, and the second connecting portion 302 is electrically connected to the second antenna unit 40; the coaxial line 30 also includes an outer conductor 303, an insulator 304 and a coaxial core 3 (not shown), the insulator 304 surrounds the coaxial core 3 (not shown), the outer conductor 303 covers the coaxial core 3 (not shown), one end of the coaxial core 3 (not shown) extends out of the insulator 304 and the outer conductor 303, the first connecting portion 301 and the second connecting portion 302 are provided at one end of the coaxial core 3 (not shown), and the first LC resonant circuit 501 and the second LC resonant circuit 502 are connected to both sides of the portion of the outer conductor 303 extending out of the first dielectric substrate 10.

[0029] This invention provides a dipole antenna 100, comprising a first dielectric substrate 10, a first antenna element 20, a coaxial line 30, a second antenna element 40, and a choke structure. The first antenna element 20 and the second antenna element 40 are both disposed on the first dielectric substrate 10. One end of the coaxial line 30 is connected to the first antenna element 20, and the other end of the coaxial line 30 is connected to the second antenna element 40, with the other end extending out of the first dielectric substrate 10. The choke structure 50 includes a first LC resonant circuit 501, which is electrically connected to one side of the portion of the coaxial line 30 extending out of the first dielectric substrate 10. The choke structure 50 can eliminate surface current on the coaxial line 30 without thickening the metal wall of the coaxial line 30, thus reducing costs. The dipole antenna 100 is small and lightweight.

[0030] This invention also provides a communication device, and specific embodiments can be found in the above-described dipole antenna 100, which will not be described in detail here.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A dipole antenna, characterized in that, include: First dielectric substrate; A first antenna element is disposed on the first dielectric substrate; The coaxial line includes an outer conductor, an insulator, and a coaxial core. The insulator surrounds the coaxial core, and the outer conductor covers the coaxial core. One end of the coaxial line is disposed on the first dielectric substrate, and the other end of the coaxial line extends out of the first dielectric substrate. A first connecting portion and a second connecting portion are provided at the end of the coaxial line located on the first dielectric substrate. A second antenna element is disposed on the first dielectric substrate, the first connecting portion is electrically connected to the first antenna element, and the second connecting portion is electrically connected to the second antenna element; The choke structure includes a first LC resonant circuit and a second LC resonant circuit. The first LC resonant circuit is electrically connected to one side of the portion of the coaxial line extending out of the first dielectric substrate, and the second LC resonant circuit is electrically connected to the other side of the portion of the outer conductor extending out of the first dielectric substrate. The first LC resonant circuit includes a second dielectric substrate, an inductor, and a capacitor. The capacitor is disposed on the second dielectric substrate, and the two ends of the inductor are electrically connected to the capacitor and one side of the portion of the outer conductor extending out of the first dielectric substrate, respectively. The capacitor includes a first metal plate and a first ground plane, which are disposed at a distance from each other on the second dielectric substrate. One end of the inductor is electrically connected to the side of the portion of the outer conductor extending out of the first dielectric substrate, and the other end of the inductor is connected to the first metal plate.

2. The dipole antenna according to claim 1, characterized in that, The number of the first LC resonant circuits is multiple, and the multiple first LC resonant circuits are arranged at intervals along one end of the coaxial line to the other end of the coaxial line. The first ground plane of the multiple first LC resonant circuits is integrally formed.

3. The dipole antenna according to claim 1, characterized in that, The second LC resonant circuit includes a second inductor and a second capacitor. The second capacitor is disposed on the second dielectric substrate. The two ends of the second inductor are respectively connected to the second capacitor and one side of the portion of the first dielectric substrate extending from the coaxial line.

4. The dipole antenna according to claim 3, characterized in that, The second capacitor includes a second metal plate and a second ground plane, which are disposed at a distance from each other on the second dielectric substrate. One end of the second inductor is electrically connected to the side of the coaxial line extending out of the first dielectric substrate, and the other end of the second inductor is connected to the second metal plate.

5. The dipole antenna according to claim 1, characterized in that, The number of the second LC resonant circuits is multiple, and the multiple second LC resonant circuits are arranged at intervals along one end of the coaxial line to the other end of the coaxial line. The second ground plane of the multiple second LC resonant circuits is integrally formed.

6. The dipole antenna according to any one of claims 3-5, characterized in that, One end of the coaxial core extends out from the insulator and the outer conductor. The first connecting part and the second connecting part are disposed at one end of the coaxial core. The first LC resonant circuit and the second LC resonant circuit are connected to both sides of the portion of the outer conductor that extends out from the first dielectric substrate.

7. A communication device, characterized in that, Including the dipole antenna as described in any one of claims 1-6.

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