CN214898869U - Antenna structure capable of reducing antenna direction coefficient - Google Patents
Antenna structure capable of reducing antenna direction coefficient Download PDFInfo
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- CN214898869U CN214898869U CN202120594531.3U CN202120594531U CN214898869U CN 214898869 U CN214898869 U CN 214898869U CN 202120594531 U CN202120594531 U CN 202120594531U CN 214898869 U CN214898869 U CN 214898869U
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Abstract
The utility model discloses an antenna structure capable of reducing antenna directional coefficient, which comprises a terminal device, a guide branch knot and a plurality of antenna bodies arranged on the terminal device; the guide branch knots are arranged on the terminal equipment and are spaced from the plurality of antenna bodies; the guide branch is in a rectangular structure, the sum of the length and the width of the guide branch is the antenna body needing to reduce the antenna direction coefficient, and the sum of the length and the width of the guide branch is 1/4 wavelength of the center frequency of the radiation frequency band. The utility model discloses an arrange one at certain interval apart from the antenna body and lead to the minor matters, reach the purpose that reduces antenna direction coefficient, reasonable in design, simple structure, with low costs, practicality are strong.
Description
Technical Field
The utility model relates to an antenna technology field especially relates to a can reduce antenna structure of antenna direction coefficient.
Background
At present, intelligent terminals, such as intelligent sound boxes, V2X, T-BOX and other devices, have high requirements on the directivity coefficient of antennas, but internal antennas on the intelligent terminals mostly adopt PIFA or dipole antennas, and the directivity coefficient of the antennas is high due to the influence of factors such as environmental layout, and even if the MIMO antenna technology is adopted, the antenna directivity coefficient is high due to reflection caused by the influence of the environment and peripheral devices.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can reduce antenna structure of antenna direction coefficient through arranging a guidance minor matters on certain interval apart from the antenna body, reaches the purpose that reduces antenna direction coefficient, reasonable in design, simple structure, with low costs, practicality are strong.
In order to realize the purpose, the following technical scheme is adopted:
an antenna structure capable of reducing antenna directional coefficients comprises terminal equipment, a guide branch knot and a plurality of antenna bodies arranged on the terminal equipment; the guide branch knots are arranged on the terminal equipment and are spaced from the plurality of antenna bodies; the guide branch is in a rectangular structure, the sum of the length and the width of the guide branch is the antenna body needing to reduce the antenna direction coefficient, and the sum of the length and the width of the guide branch is 1/4 wavelength of the center frequency of the radiation frequency band.
In one embodiment, the number of the antenna bodies is set to be one, and the antenna bodies are arranged on one side of the terminal equipment; the guide branch is arranged in parallel with the length direction of the antenna body, and the interval between the guide branch and the antenna body is 1/2 wavelengths of the center frequency of the frequency band radiated by the antenna body.
In another embodiment, the number of the antenna bodies is two, and one antenna body is respectively arranged on two opposite sides of one of the terminal devices; the leading branch is arranged between the two antenna bodies, and the interval between the leading branch and one of the antenna bodies needing to reduce the antenna direction coefficient is as follows: 1/2 wavelengths of the center frequency of the frequency band radiated by the antenna body.
In summary, the antenna body includes a dielectric substrate disposed on the terminal device, a coaxial line, and an antenna radiator disposed on the dielectric substrate; the antenna radiator comprises a first resonance branch for radiating a first frequency band, and a ground feeding branch and a feed feeding branch which are connected with the first resonance branch; the ground feeding branch is also provided with a ground feeding point, and the feed feeding branch is also provided with a feed point; the coaxial line comprises a conductor outer sleeve and an inner conductor coaxially inserted in the conductor outer sleeve; the conductor jacket of one end of the coaxial line is arranged on the feed branch, the other end of the coaxial line extends to the feed ground branch, and the inner conductor of the end of the coaxial line extending to the feed ground branch is connected with the feed point.
Adopt above-mentioned scheme, the beneficial effects of the utility model are that:
the guide branch is arranged at the 1/2 wavelength away from the center frequency of the frequency band radiated by the antenna body, so that the purpose of reducing the antenna direction coefficient is achieved, and the antenna is reasonable in design, simple in structure, low in cost and high in practicability.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention;
fig. 3 is a schematic structural diagram of the antenna body of the present invention;
wherein the figures identify the description:
1-a terminal device; 2-leading to branch knots;
3-an antenna body; 31-a dielectric substrate;
32-coaxial line; 33 — first resonant branch;
34-a feed-through location; 35-feeding point;
36-ground feeding branch; 37-feeding branch.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, the present invention provides an antenna structure capable of reducing antenna directional coefficients, which includes a terminal device 1, a guide branch 2, and a plurality of antenna bodies 3 installed on the terminal device 1; the guide branches 2 are arranged on the terminal equipment 1 and are spaced from the plurality of antenna bodies 3; the guide branch 2 is in a rectangular structure, and the sum of the length and the width of the guide branch 2 is the 1/4 wavelengths of the center frequency of the radiation frequency band of the antenna body 3 needing to reduce the antenna direction coefficient.
In one embodiment, the number of the antenna bodies 3 is set to be one, and the antenna bodies 3 are arranged on one side of the terminal device 1; the guide branch 2 is arranged parallel to the length direction of the antenna body 3, and the interval between the guide branch 2 and the antenna body 3 is 1/2 wavelengths of the center frequency of the frequency band radiated by the antenna body 3.
In another embodiment, the number of the antenna bodies 3 is two, and one of the two opposite sides of the terminal device 1 is respectively provided with one antenna body 3; the guide branch 2 is arranged between the two antenna bodies 3, and the interval between the guide branch 2 and one of the antenna bodies 3 which needs to reduce the antenna direction coefficient is as follows: the antenna body 3 radiates 1/2 wavelengths of the center frequency of the frequency band.
Summarizing the above embodiments, the antenna body 3 includes a dielectric substrate 31 disposed on the terminal device 1, a coaxial line 32, and an antenna radiator disposed on the dielectric substrate 31; the antenna radiator comprises a first resonant branch 33 for radiating a first frequency band, and a ground feed branch 36 and a feed branch 37 connected to the first resonant branch 33; a ground feeding point 34 is further arranged on the ground feeding branch 36, and a feeding point 35 is further arranged on the feeding branch 37; the coaxial line 32 comprises a conductor outer sleeve and an inner conductor coaxially inserted in the conductor outer sleeve; the conductor jacket of one end of the coaxial line 32 is arranged on the feeding branch 37, the other end of the coaxial line 32 extends towards the feeding ground branch 36, and the inner conductor of the end of the coaxial line 32 extending towards the feeding ground branch 36 is connected with the feeding ground 34.
The utility model discloses the theory of operation:
with continued reference to fig. 1 to 3, the antenna structure is based on a single antenna or MIMO antenna system on the original terminal device 1, and the purpose of reducing the antenna directivity coefficient is achieved by adding the guide branches 2 (based on the working principle of the director in the yagi antenna) at certain intervals from the antenna body 3.
In one embodiment, a single antenna is taken as an example, the antenna body 3 is disposed on one side of the terminal device 1 to ensure that the gain of the horizontal plane is maximized and the directivity coefficient is minimized, but at the same time, the horizontal plane pattern of the antenna on the other side opposite to the antenna body inevitably has a partial depression of the pattern due to the reflection of the housing and other devices, so that the directivity coefficient of the antenna is too high, and therefore, at a wavelength of 1/2 from the center frequency of the frequency band radiated by the antenna body 3, the directivity coefficient of the antenna is reduced by disposing the guide branch 2 having a length and a width of 1/4 wavelengths, the sum of which is the center frequency of the radiation frequency band of the antenna body 3.
TABLE 1 Single antenna directivity coefficient Table before and after increasing the guide branches
In another embodiment, the antenna is a MIMO antenna (2 x 1), two antennas of the MIMO antenna are respectively disposed at two sides of the terminal device 1, and other metal structures such as a flat cable are disposed between the two antennas, which may affect radiation of the antennas, so that the reflection direction coefficient is still high, and therefore, a guide branch 2 is added between the two antennas to reduce the directivity coefficient.
In addition, the antenna radiator of the antenna body 3 is used for radiating 2.4-2.5 GHz (first frequency band), the length of the antenna radiator is about 20mm, the coaxial line 32 is arranged on the ground feeding branch 36 and the feed feeding branch 37 to form a balun structure, and the radiation efficiency of the antenna is ensured.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. An antenna structure capable of reducing antenna directional coefficients is characterized by comprising terminal equipment, a guide branch knot and a plurality of antenna bodies arranged on the terminal equipment; the guide branch knots are arranged on the terminal equipment and are spaced from the plurality of antenna bodies; the guide branch is in a rectangular structure, the sum of the length and the width of the guide branch is the antenna body needing to reduce the antenna direction coefficient, and the sum of the length and the width of the guide branch is 1/4 wavelength of the center frequency of the radiation frequency band.
2. The antenna structure capable of reducing the antenna directional coefficient according to claim 1, wherein the number of the antenna bodies is set to be one, and the antenna bodies are arranged on one side of the terminal device; the guide branch is arranged in parallel with the length direction of the antenna body, and the interval between the guide branch and the antenna body is 1/2 wavelengths of the center frequency of the frequency band radiated by the antenna body.
3. The antenna structure capable of reducing the antenna directional coefficient according to claim 1, wherein the number of the antenna bodies is two, and one antenna body is respectively arranged on two opposite sides of the terminal device; the leading branch is arranged between the two antenna bodies, and the interval between the leading branch and one of the antenna bodies needing to reduce the antenna direction coefficient is as follows: 1/2 wavelengths of the center frequency of the frequency band radiated by the antenna body.
4. The antenna structure capable of reducing the antenna directional coefficient according to any one of claims 2 to 3, wherein the antenna body comprises a dielectric substrate disposed on the terminal device, a coaxial line, and an antenna radiator disposed on the dielectric substrate; the antenna radiator comprises a first resonance branch for radiating a first frequency band, and a ground feeding branch and a feed feeding branch which are connected with the first resonance branch; the ground feeding branch is also provided with a ground feeding point, and the feed feeding branch is also provided with a feed point; the coaxial line comprises a conductor outer sleeve and an inner conductor coaxially inserted in the conductor outer sleeve; the conductor jacket of one end of the coaxial line is arranged on the feed branch, the other end of the coaxial line extends to the feed ground branch, and the inner conductor of the end of the coaxial line extending to the feed ground branch is connected with the feed point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120594531.3U CN214898869U (en) | 2021-03-23 | 2021-03-23 | Antenna structure capable of reducing antenna direction coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120594531.3U CN214898869U (en) | 2021-03-23 | 2021-03-23 | Antenna structure capable of reducing antenna direction coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214898869U true CN214898869U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120594531.3U Active CN214898869U (en) | 2021-03-23 | 2021-03-23 | Antenna structure capable of reducing antenna direction coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214898869U (en) |
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2021
- 2021-03-23 CN CN202120594531.3U patent/CN214898869U/en active Active
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