CN111613875A - Dipole antenna and radio frequency antenna system - Google Patents
Dipole antenna and radio frequency antenna system Download PDFInfo
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- CN111613875A CN111613875A CN202010453292.XA CN202010453292A CN111613875A CN 111613875 A CN111613875 A CN 111613875A CN 202010453292 A CN202010453292 A CN 202010453292A CN 111613875 A CN111613875 A CN 111613875A
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- dipole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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- Variable-Direction Aerials And Aerial Arrays (AREA)
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Abstract
The dipole antenna comprises an antenna main body, wherein the antenna main body at least comprises a first antenna unit and a second antenna unit with the same structure as the first antenna unit; the first antenna unit comprises a radiation section and a signal feed-in section, the radiation section is arc-shaped and used for providing an impedance matching function, the first end of the radiation section is connected with the signal feed-in 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 in a circular gap structure; the first antenna unit and the second antenna unit are in linear 180-degree rotary inversion, and a signal feed-in section of the first antenna unit is arranged opposite to a signal feed-in section of the second antenna unit; the signal feed-in section of the first antenna unit is provided with a grounding point, and the signal feed-in section of the second antenna unit is provided with a signal feed-in point, so that a novel dipole antenna is provided, and the built-in antenna has the characteristics of lightness, thinness and smallness under the condition of not reducing the performance of the antenna.
Description
Technical Field
The application relates to the technical field of antennas, in particular to a dipole antenna and a radio frequency antenna system.
Background
With the ever increasing demands on communication quality and integration of communication devices. As a network communication terminal electronic product sub-component, the antenna also needs higher performance to meet the demand of the communication system. The popularization rate of various mobile terminal devices in society is increased very fast, and the most convenient and fast mode is a wireless access mode, so that a large amount of network laying cost is saved by the wireless access mode, the mobile terminal devices can be rapidly planned, rapidly installed and rapidly put into use, and the maintenance is relatively simple.
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 is desired to be sufficiently small in size, low in cost, and easy to process and install. At present, built-in PCB printed antennas of various network communication terminal products develop towards small space and high performance, and how to design a miniaturized built-in antenna becomes the difficulty and bottleneck of mobile communication development.
Disclosure of Invention
The application aims to provide a dipole antenna and a radio frequency antenna system, and aims to enable a built-in antenna to have the characteristics of lightness, thinness and smallness under the condition that the performance of the antenna is not reduced.
The first aspect of the present application provides a dipole antenna, including an antenna main body, where the antenna main body at least includes a first antenna element and a second antenna element, and the second antenna element has the same structure as the first antenna element;
the first antenna unit comprises a radiation section and a signal feed-in section, wherein the radiation section is arc-shaped and used for providing an impedance matching function, the first end of the radiation section is connected with the signal feed-in 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 in a circular gap structure;
the first antenna unit and the second antenna unit are in linear 180-degree rotation inversion, and a signal feed-in section of the first antenna unit is arranged opposite to a signal feed-in section of the second antenna unit;
the signal feed-in section of the first antenna unit is provided with a signal feed-in point, and the signal feed-in section of the second antenna unit is provided with a grounding point.
Optionally, the antenna body is helical.
Optionally, the total length of the first antenna unit is one quarter of the wavelength of the preset antenna frequency band.
Optionally, the radiation section is of a gradual impedance change structure.
Optionally, the radiation section of the first antenna unit and the radiation section of the second antenna unit are arranged in a central symmetry manner.
Optionally, the signal feed-in section of the first antenna unit and the signal feed-in section of the second antenna unit are arranged in a central symmetry manner.
Optionally, the ground point of the first antenna unit is used for being connected with a core wire of a coaxial cable, and the signal feed point of the second antenna unit is used for being connected with a ground wire of the coaxial cable.
Optionally, a preset gap exists between the signal feed-in segment of the first antenna unit and the signal feed-in segment of the second antenna unit.
Optionally, the radiation section and the signal feed-in section are both arranged on the printed circuit board.
A second aspect of the present application also provides a radio frequency antenna system, comprising: a coaxial cable line; and the dipole antenna is connected with the coaxial cable.
In the dipole antenna and the radio frequency antenna system provided by the application, the dipole antenna comprises an antenna main body, the antenna main body at least comprises 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 comprises a radiation section and a signal feed-in section, the radiation section is arc-shaped and used for providing an impedance matching function, the first end of the radiation section is connected with the signal feed-in 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 in a circular gap structure; the first antenna unit and the second antenna unit are in linear 180-degree rotary inversion, and a signal feed-in section of the first antenna unit is arranged opposite to a signal feed-in section of the second antenna unit; the signal feed-in section of the first antenna unit is provided with a grounding point, and the signal feed-in section of the second antenna unit is provided with a signal feed-in point, so that a novel dipole antenna is provided, and the built-in antenna has the characteristics of lightness, thinness and smallness under the condition of not reducing the performance of the antenna.
Drawings
Fig. 1 is a schematic structural diagram of a dipole antenna provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a dipole antenna provided in another embodiment of the present application;
fig. 3 is a schematic signal flow diagram of a dipole antenna according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The present embodiment provides a dipole antenna, and referring to fig. 1 and fig. 2, the dipole antenna in this embodiment includes an antenna main body, where the antenna main body includes at least a first antenna element and a second antenna element, and the second antenna element has the same structure as the first antenna element; the first antenna unit comprises a radiation section 02 and a signal feed-in section 00, wherein the radiation section 02 is arc-shaped and is used for providing an impedance matching function, a first end of the radiation section 02 is connected with the signal feed-in section 00, and a 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 in a circular gap structure; the first antenna unit and the second antenna unit are in linear 180-degree rotation inversion, and a signal feed-in section 00 of the first antenna unit is arranged opposite to a signal feed-in section 10 of the second antenna unit; the signal feed-in section 00 of the first antenna unit is provided with a signal feed-in point, and the signal feed-in section 10 of the second antenna unit is provided with a grounding point.
In this embodiment, the first antenna unit and the second antenna unit are rotated and inverted by 180 degrees linearly, the first antenna unit includes a radiation section 02 and a signal feed-in section 00, the second antenna unit includes a radiation section 12 and a signal feed-in section 10, specifically, the signal feed-in section 00 and the signal feed-in section 10 are arranged oppositely and do not contact with each other, the width of the radiation section 02 is gradually increased from a first end to a second end thereof, the width of the radiation section 12 is gradually increased from the first end to the second end thereof, a through hole 04 is arranged at the second end of the radiation section 02, and a through hole 14 is arranged 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 in a circular slot structure. Because 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 radian of the radiation section. Specifically, the second end of the radiation section is wide, the current of the radiation section is maximum, the radiation area can be effectively increased, and the radiation section adopts a radian design, so that impedance matching is easily realized, and the efficiency and the benefit of the antenna main body are improved.
In one embodiment, the antenna body is helical.
In this embodiment, referring to fig. 1 and fig. 2, the radiation section 02 and the radiation section 12 are both arc-shaped, and since the first antenna unit and the second antenna unit are linearly and rotationally inverted by 180 °, the antenna body is spiral and is similar to a shape of a fish in the taiji diagram, so that high efficiency and high gain performance of the antenna in a complex environment can be realized.
In one embodiment, the total length of the first antenna unit is one quarter of the wavelength of the preset antenna frequency band.
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-in section 00, and the total length of the first antenna unit is one quarter of the wavelength of the preset antenna frequency band, so that a single-frequency radiation section with a simple structure can be formed. Furthermore, the antenna in the embodiment has small size and low profile, saves cost, maintains the overall appearance of a finished product, so that the radiating section of the antenna can be in a limited space, the space is utilized to the maximum, and the bandwidth, the efficiency and the gain of the antenna are increased.
In one embodiment, the radiating section is of a graded impedance structure.
In one embodiment, the radiation section of the first antenna unit and the radiation section of the second antenna unit are arranged in a central symmetry mode.
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 a radian, and the impedances thereof are gradually changed and are centrosymmetric, so that impedance matching can be realized, and the efficiency and the gain of the antenna body can be improved.
In one embodiment, the signal feed point of the first antenna unit is used for connecting with a core wire of a coaxial cable, and the grounding point of the second antenna unit is used for connecting with a ground wire of the coaxial cable.
In this embodiment, referring to fig. 2, the signal feeding section 200 of the antenna main body is centrosymmetric, 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 disposed on the signal feeding section 00, and a grounding point is disposed on the signal feeding section 10. Furthermore, the other end of the radiation section of each antenna unit, which is opposite to the signal feed-in point, is provided with an open-circuit point.
In one embodiment, a predetermined gap exists between the signal feeding segment of the first antenna unit and the signal feeding segment of the second antenna unit.
In this embodiment, the signal feeding segment of the first antenna unit and the signal feeding segment of the second antenna unit are spaced apart and disposed opposite to each other without contacting each other.
In one embodiment, the radiating section and the signal feed-in section are both disposed on a printed circuit board.
In this embodiment, the radiation sections and the signal feed-in section of the first antenna element and the second antenna element may be printed on a PCB (printed circuit board).
In one embodiment, the antenna body of the dipole antenna in this embodiment may be printed on a PCB, and the antenna may be mounted on the chassis of the whole device in a single use.
In one embodiment, the antenna is mounted by assembly, the antenna body is printed on a PCB board, the PCB antenna can be manufactured independently and mounted on the inner wall of the casing, or the PCB antenna can be printed on a system main board to manufacture an on-board antenna, and both the mounting modes can feed power through a 50 ohm coaxial cable and are connected to an RF radio frequency system of the network communication terminal equipment through the coaxial cable to work.
In an embodiment, the present application further provides a radio frequency antenna system, which includes a coaxial cable and the dipole antenna according to any of the above embodiments, where the dipole antenna is connected to the coaxial cable.
In an embodiment, fig. 3 is a schematic signal flow direction diagram of a dipole antenna provided in an embodiment of the present application, and referring to fig. 3, a pointing direction of an arrow shown in the diagram is a signal flow direction, for example, the coaxial cable 100 feeds the antenna main body, a core wire of the coaxial cable 100 is connected to the signal feed-in section 00 of the first antenna unit (the signal feed-in section 00 is provided with a signal feed-in point), a ground wire of the coaxial cable 100 is connected to the signal feed-in section 10 of the second antenna unit (the signal feed-in section 10 is provided with a ground point), and the other end of the coaxial cable 100 is connected to a complete machine motherboard system, so as to implement a wireless function.
Compared with the traditional method, the dipole antenna in the embodiment has the beneficial effects that: because the two current paths with two electrical lengths in the main radiator form a radian, the characteristic impedance of each point along the line is gradually changed, so that the main radiator has special impedance characteristics; the size and radian of the main radiator (namely the radiation section) and the design size of the circular gap are adjusted to adjust the performance of the antenna, the antenna is simple and easy to adjust, and can be applied to various required frequency bands, and the theoretical loss of the main radiator is small, so that the aim of high efficiency can be achieved.
In the dipole antenna and the radio frequency antenna system provided by the application, the dipole antenna comprises an antenna main body, the antenna main body at least comprises 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 comprises a radiation section and a signal feed-in section, the radiation section is arc-shaped and used for providing an impedance matching function, the first end of the radiation section is connected with the signal feed-in 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 in a circular gap structure; the first antenna unit and the second antenna unit are in linear 180-degree rotary inversion, and a signal feed-in section of the first antenna unit is arranged opposite to a signal feed-in section of the second antenna unit; the signal feed-in section of the first antenna unit is provided with a grounding point, and the signal feed-in section of the second antenna unit is provided with a signal feed-in point, so that a novel dipole antenna is provided, and the built-in antenna has the characteristics of lightness, thinness and smallness under the condition of not reducing the performance of the antenna.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A dipole antenna, comprising an antenna body, wherein the antenna body comprises at least a first antenna element and a second antenna element, and the second antenna element has the same structure as the first antenna element;
the first antenna unit comprises a radiation section and a signal feed-in section, wherein the radiation section is arc-shaped and used for providing an impedance matching function, the first end of the radiation section is connected with the signal feed-in 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 in a circular gap structure;
the first antenna unit and the second antenna unit are in linear 180-degree rotation inversion, and a signal feed-in section of the first antenna unit is arranged opposite to a signal feed-in section of the second antenna unit;
the signal feed-in section of the first antenna unit is provided with a signal feed-in point, and the signal feed-in section of the second antenna unit is provided with a grounding point.
2. A dipole antenna as recited in claim 1, wherein said antenna body is helical.
3. A dipole antenna as claimed in claim 1, wherein said first antenna element has a total length of one quarter of a wavelength of a predetermined antenna frequency band.
4. A dipole antenna as recited in claim 1, wherein said radiating sections are impedance grading structures.
5. A dipole antenna as recited in claim 1, wherein the radiating section of said first antenna element is disposed in central symmetry with the radiating section of said second antenna element.
6. A dipole antenna as recited in claim 1, wherein the signal feed-in section of said first antenna element is disposed in central symmetry with the signal feed-in section of said second antenna element.
7. A dipole antenna as recited in claim 1, wherein said ground point of said first antenna element is adapted to be connected to a core of a coaxial cable line, and said signal feed point of said second antenna element is adapted to be connected to a ground line of said coaxial cable line.
8. A dipole antenna as recited in claim 1, wherein a predetermined gap exists between the signal feed segment of said first antenna element and the signal feed segment of said second antenna element.
9. A dipole antenna as recited in claim 1, wherein said radiating section and said signal feed section are disposed on a printed circuit board.
10. A radio frequency antenna system, comprising: a coaxial cable line; and a dipole antenna as claimed in any one of claims 1 to 9 connected to said coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453292.XA CN111613875A (en) | 2020-05-26 | 2020-05-26 | Dipole antenna and radio frequency antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453292.XA CN111613875A (en) | 2020-05-26 | 2020-05-26 | Dipole antenna and radio frequency antenna system |
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| Publication Number | Publication Date |
|---|---|
| CN111613875A true CN111613875A (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010453292.XA Pending CN111613875A (en) | 2020-05-26 | 2020-05-26 | Dipole antenna and radio frequency antenna system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088410A1 (en) * | 2020-10-27 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Antenna assembly and unmanned aerial vehicle |
| CN114976622A (en) * | 2022-07-05 | 2022-08-30 | 天津理工大学 | quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches |
-
2020
- 2020-05-26 CN CN202010453292.XA patent/CN111613875A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088410A1 (en) * | 2020-10-27 | 2022-05-05 | 深圳市大疆创新科技有限公司 | Antenna assembly and unmanned aerial vehicle |
| CN114976622A (en) * | 2022-07-05 | 2022-08-30 | 天津理工大学 | quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches |
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