Dipole antenna and radio frequency antenna system

Abstract

The present application belongs to the field of antenna technology, and provides a dipole antenna and a radio frequency antenna system, wherein the dipole antenna comprises an antenna body, and the antenna body comprises at least a first antenna unit and a second antenna unit having the same structure as the first antenna unit; the first antenna unit comprises a radiating section and a signal feeding section, the radiating section is arc-shaped, and is used to provide an impedance matching function, the first end of the radiating section is connected to the signal feeding section, and the second end of the radiating section is provided with a through hole, so that the second end of the radiating section is a circular slot structure; the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, and the signal feeding section of the first antenna unit is arranged opposite to the signal feeding section of the second antenna unit; the signal feeding section of the first antenna unit is provided with a grounding point, and the signal feeding section of the second antenna unit is provided with a signal feeding point, thereby providing a new type of dipole antenna, which makes the built-in antenna light, thin and small without reducing the antenna performance.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a dipole antenna and a radio frequency antenna system. Background Art

[0002] As people's requirements for communication quality and integration of communication equipment continue to increase. As a sub-component of network communication terminal electronic products, antennas also need higher performance to meet the needs of communication systems. The popularity 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] The antenna is required to have good impedance matching characteristics, stable radiation directivity, relatively flat gain characteristics and polarization characteristics within its operating frequency band, and it is also expected to be small enough, low cost, and easy to process and install. At present, the built-in PCB printed antennas of various network communication terminal products are developing towards small space and high performance. How to design a miniaturized built-in antenna has become a difficulty and bottleneck in the development of mobile communications. Summary of the invention

[0004] The purpose of the present application is to provide a dipole antenna and a radio frequency antenna system, aiming to make the internal antenna light, thin and small without reducing the antenna performance.

[0005] In a first aspect, the present application provides a dipole antenna, including an antenna body, wherein the antenna body includes at least a first antenna unit and a second antenna unit, wherein the second antenna unit has the same structure as the first antenna unit;

[0006] The first antenna unit comprises a radiating section and a signal feeding section, the radiating section is arc-shaped and is used to provide an impedance matching function, wherein a first end of the radiating section is connected to the signal feeding section, and a through hole is provided at a second end of the radiating section, so that the second end of the radiating section is a circular slot structure;

[0007] The first antenna unit and the second antenna unit are linearly rotated 180 degrees and inverted, and the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit are arranged opposite to each other;

[0008] The signal feeding section of the first antenna unit is provided with a signal feeding point, and the signal feeding section of the second antenna unit is provided with a grounding point.

[0009] Optionally, the antenna body is spiral-shaped.

[0010] Optionally, the total length of the first antenna unit is one quarter of the wavelength of a preset antenna frequency band.

[0011] Optionally, the radiation section has an impedance gradient structure.

[0012] Optionally, the radiation section of the first antenna unit and the radiation section of the second antenna unit are arranged in a centrally symmetrical manner.

[0013] Optionally, the signal feeding segment of the first antenna unit and the signal feeding segment of the second antenna unit are arranged in a centrally symmetrical manner.

[0014] Optionally, the grounding point of the first antenna unit is used to connect to the core wire of the coaxial cable, and the signal feeding point of the second antenna unit is used to connect to the ground wire of the coaxial cable.

[0015] Optionally, there is a preset gap between the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit.

[0016] Optionally, the radiation section and the signal feeding section are both arranged on a printed circuit board.

[0017] A second aspect of the present application further provides a radio frequency antenna system, comprising: a coaxial cable; and a dipole antenna as described in any one of the above items, wherein the dipole antenna is connected to the coaxial cable.

[0018] In the dipole antenna and radio frequency antenna system provided by the present application, the dipole antenna includes an antenna body, the antenna body includes at least a first antenna unit and a second antenna unit, the second antenna unit has the same structure as the first antenna unit; the first antenna unit includes a radiation section and a signal feeding section, the radiation section is arc-shaped, used to provide impedance matching function, the first end of the radiation section is connected to the signal feeding section, and the second end of the radiation section is provided with a through hole, so that the second end of the radiation section is a circular slot structure; the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, and the signal feeding section of the first antenna unit is arranged opposite to the signal feeding section of the second antenna unit; the signal feeding section of the first antenna unit is provided with a grounding point, and the signal feeding section of the second antenna unit is provided with a signal feeding point, thereby providing a new type of dipole antenna, which makes the built-in antenna light, thin and small without reducing the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a dipole antenna provided in one embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a dipole antenna provided in another embodiment of the present application;

[0021] Figure 3 A schematic diagram of signal flow of a dipole antenna provided for one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] In the description of this application, it should be understood that 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 technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] The present application embodiment provides a dipole antenna, see Figure 1 and Figure 2 As shown, the dipole antenna in this embodiment includes an antenna body, which includes at least a first antenna unit and a second antenna unit, and the second antenna unit has the same structure as the first antenna unit; the first antenna unit includes a radiation section 02 and a signal feeding section 00, and the radiation section 02 is arc-shaped and is used to provide an impedance matching function, wherein the first end of the radiation section 02 is connected to the signal feeding section 00, and the second end of the radiation section 02 is provided with a through hole 04, so that the second end of the radiation section 02 is a circular slot structure; the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, and the signal feeding section 00 of the first antenna unit is arranged opposite to the signal feeding section 10 of the second antenna unit; the signal feeding section 00 of the first antenna unit is provided with a signal feeding point, and the signal feeding section 10 of the second antenna unit is provided with a grounding point.

[0025] In this embodiment, the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, the first antenna unit includes a radiation section 02 and a signal feeding section 00, and the second antenna unit includes a radiation section 12 and a signal feeding section 10. Specifically, the signal feeding section 00 and the signal feeding section 10 are arranged opposite to each other, and the two do not contact each other. The width of the radiation section 02 gradually increases from its first end to the second end, and the width of the radiation section 12 gradually increases from its first end to the second end, and a through hole 04 is provided at the second end of the radiation section 02, and a through hole 14 is provided at the second end of the radiation section 12, so that the second ends of the radiation section 02 and the radiation section 12 are circular gap structures. Since the radiation section 02 and the radiation section 12 are arc-shaped, the input impedance of the antenna can be flexibly adjusted by adjusting the size of the through hole and the curvature of the radiation section. Specifically, the second end of the radiation section is wider, and the current in this part is also the largest, which can effectively increase the radiation area, and the radiation section adopts a curvature design, which is easy to achieve impedance matching and improve the efficiency and benefit of the antenna body.

[0026] In one embodiment, the antenna body is helical in shape.

[0027] In this embodiment, see Figure 1 and Figure 2 As shown, the radiation section 02 and the radiation section 12 are both arc-shaped. Since the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, the antenna body is now spiral-shaped, similar to the yin-yang fish shape in the Tai Chi diagram, which can achieve high efficiency and high gain performance of the antenna in complex environments.

[0028] In one embodiment, the total length of the first antenna unit is one quarter of the wavelength of a preset antenna frequency band.

[0029] In this embodiment, the total length of the first antenna unit is the sum of the lengths of the radiation section 02 and the signal feed section 00. The total length of the first antenna unit is one quarter of the wavelength of the preset antenna frequency band, which can form a single-frequency radiation section with a simple structure. Compared with the traditional dipole antenna, the dipole antenna in this embodiment can broaden the radiation frequency band and improve the radiation performance while effectively keeping the radiation field basically unchanged. Furthermore, the antenna in this embodiment is small in size and low in profile, which saves costs and maintains the overall appearance of the finished product, so that the antenna radiation section can maximize the use of space in a limited space and increase the bandwidth, efficiency and gain of the antenna.

[0030] In one embodiment, the radiation section has an impedance gradient structure.

[0031] In one embodiment, the radiation section of the first antenna unit and the radiation section of the second antenna unit are arranged in a centrally symmetrical manner.

[0032] In this embodiment, the radiation section 02 of the first antenna unit and the radiation section 12 of the second antenna unit are both designed in an arc, with gradual impedance and central symmetry, so as to achieve impedance matching and improve the efficiency and gain of the antenna body.

[0033] In one embodiment, the signal feeding point of the first antenna unit is used to connect to the core wire of the coaxial cable, and the grounding point of the second antenna unit is used to connect to the ground wire of the coaxial cable.

[0034] In this embodiment, see Figure 2 As shown, the signal feeding section 200 of the antenna body is centrally symmetrical, and the signal feeding section 200 includes a signal feeding section 00 of the first antenna unit and a signal feeding section 10 of the second antenna unit. A signal feeding point is provided on the signal feeding section 00, and a grounding point is provided on the signal feeding section 10. Furthermore, an open point is provided at the other end of the radiation section of each antenna unit opposite to the signal feeding point.

[0035] In one embodiment, there is a preset gap between the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit.

[0036] In this embodiment, the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit are spaced apart and arranged opposite to each other without contacting each other.

[0037] In one embodiment, the radiation section and the signal feeding section are both disposed on a printed circuit board.

[0038] In this embodiment, the radiation section and the signal feeding section of the first antenna unit and the second antenna unit may be printed on a PCB (printed circuit board).

[0039] In one embodiment, the antenna body of the dipole antenna in this embodiment can be manufactured by PCB printing, and the antenna can be installed alone on the casing of the whole machine.

[0040] In one embodiment, the antenna is installed in an assembled manner, and the antenna body is printed on a PCB board. It can be made into a separate PCB antenna and installed on the inner wall of the casing, or it can be printed on the system motherboard to make a board-mounted antenna. Both installation methods can be fed through a 50-ohm coaxial cable and connected to the RF radio frequency system of the Netcom terminal device through a coaxial cable to work.

[0041] In one embodiment, the present application also provides a radio frequency antenna system, which includes a coaxial cable and a dipole antenna as described in any of the above embodiments, wherein the dipole antenna is connected to the coaxial cable.

[0042] In one embodiment, Figure 3 A schematic diagram of the signal flow of a dipole antenna provided in one embodiment of the present application, see Figure 3 As shown, the direction of the arrow shown in the figure is the flow direction of the signal. For example, the coaxial cable 100 feeds the antenna body, the core wire of the coaxial cable 100 is connected to the signal feeding segment 00 of the first antenna unit (a signal feeding point is provided on the signal feeding segment 00), the ground wire of the coaxial cable 100 is connected to the signal feeding segment 10 of the second antenna unit (a grounding point is provided on the signal feeding segment 10), and the other end of the coaxial cable 100 is connected to the mainboard system of the whole machine to realize the wireless function.

[0043] Compared with the traditional method, the dipole antenna in this embodiment has the following beneficial effects: since the two current paths of two electrical lengths in the main radiator form an arc, the characteristic impedance of each point along the line can be gradually changed, so that it has special impedance characteristics; the size and arc of the main radiator (i.e., the radiation section) and the design size of the circular gap are adjusted to adjust the antenna performance, which is simple and easy to adjust and can be applied to various required frequency bands. In addition, the theoretical loss of the main radiator is small, so the goal of high efficiency can be achieved.

[0044] In the dipole antenna and radio frequency antenna system provided by the present application, the dipole antenna includes an antenna body, the antenna body includes at least a first antenna unit and a second antenna unit, the second antenna unit has the same structure as the first antenna unit; the first antenna unit includes a radiation section and a signal feeding section, the radiation section is arc-shaped, used to provide an impedance matching function, the first end of the radiation section is connected to the signal feeding section, and the second end of the radiation section is provided with a through hole, so that the second end of the radiation section is a circular slot structure; the first antenna unit and the second antenna unit are linearly rotated 180° and inverted, and the signal feeding section of the first antenna unit is arranged opposite to the signal feeding section of the second antenna unit; the signal feeding section of the first antenna unit is provided with a grounding point, and the signal feeding section of the second antenna unit is provided with a signal feeding point, thereby providing a new type of dipole antenna, which makes the built-in antenna light, thin and small without reducing the antenna performance.

[0045] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A dipole antenna, characterized in that: The antenna body comprises at least a first antenna unit and a second antenna unit, wherein the second antenna unit has the same structure as the first antenna unit; The first antenna unit comprises a radiating section and a signal feeding section, the radiating section is arc-shaped and is used to provide an impedance matching function, wherein a first end of the radiating section is connected to the signal feeding section, and a through hole is provided at a second end of the radiating section, so that the second end of the radiating section is a circular slot structure; The first antenna unit and the second antenna unit are linearly rotated 180 degrees and inverted, and the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit are arranged opposite to each other; The signal feeding section of the first antenna unit is provided with a signal feeding point, and the signal feeding section of the second antenna unit is provided with a grounding point; the width of the radiation section of the first antenna unit gradually increases from its first end to the second end, and the width of the radiation section of the second antenna unit gradually increases from its first end to the second end.

2. The dipole antenna according to claim 1, characterized in that The antenna body is in a spiral shape.

3. The dipole antenna according to claim 1, characterized in that: The total length of the first antenna unit is one quarter of the wavelength of a preset antenna frequency band.

4. The dipole antenna according to claim 1, characterized in that: The radiation section has a gradient impedance structure.

5. The dipole antenna according to claim 1, characterized in that: The radiation section of the first antenna unit and the radiation section of the second antenna unit are arranged in a centrally symmetrical manner.

6. The dipole antenna according to claim 1, wherein: The signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit are centrally symmetrically arranged.

7. The dipole antenna according to claim 1, characterized in that: The grounding point of the first antenna unit is used to connect to the core wire of the coaxial cable, and the signal feeding point of the second antenna unit is used to connect to the ground wire of the coaxial cable.

8. The dipole antenna according to claim 1, wherein: There is a preset gap between the signal feeding section of the first antenna unit and the signal feeding section of the second antenna unit.

9. The dipole antenna according to claim 1, wherein: The radiation section and the signal feeding section are both arranged on a printed circuit board.

10. A radio frequency antenna system, characterized in that: include: Coaxial cable; And the dipole antenna according to any one of claims 1 to 9, wherein the dipole antenna is connected to the coaxial cable.

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