CN215989216U - Decoupling device and array antenna - Google Patents
Decoupling device and array antenna Download PDFInfo
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- CN215989216U CN215989216U CN202121419778.8U CN202121419778U CN215989216U CN 215989216 U CN215989216 U CN 215989216U CN 202121419778 U CN202121419778 U CN 202121419778U CN 215989216 U CN215989216 U CN 215989216U
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- 230000005855 radiation Effects 0.000 claims abstract description 94
- 238000002955 isolation Methods 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 7
- 238000010295 mobile communication Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Abstract
The utility model provides a decoupling device and an array antenna, comprising a reflecting plate, a first radiation assembly, a second radiation assembly and a decoupling assembly; the first radiation assembly works in a first frequency band, and comprises a support column and a radiation arm, wherein the support column is mounted on one side of the reflecting plate, and the radiation arm extends outwards from the support column; the second radiation component works in a second frequency band, and the second frequency band is higher than the first frequency band; the decoupling assembly comprises a conducting layer which is sleeved on the radiating arm and is spaced from the radiating arm, the conducting layer is provided with a plurality of radiating gaps, the radiating gaps can allow the electromagnetic waves of the first frequency band to pass through, and the radiating gaps can block the electromagnetic waves of the second frequency band from passing through. The decoupling assembly is sleeved on the radiation arm, allows low-frequency band electromagnetic wave signals to pass through and blocks high-frequency band electromagnetic signals, and therefore the influence of the first radiation assembly on the performance of the second radiation assembly is reduced.
Description
Technical Field
The utility model relates to the field of wireless communication base station antennas, in particular to a decoupling device and an array antenna.
Background
A Base Station (BS), i.e., a public mobile communication base station, is a form of radio station, which refers to a radio transceiver station for information transfer with a mobile phone terminal through a mobile communication switching center in a limited radio coverage area. The base station is a basic unit forming a cell in mobile communication, and completes communication and management functions between a mobile communication network and mobile communication users.
The base station antenna is an important component of wireless communication, and along with the rapid development of wireless communication, the capacity demand is greatly increased, and the multi-frequency antenna becomes the market mainstream. Current multi-frequency antennas include low frequency antenna arrays and high frequency antenna arrays. Along with station antenna quantity constantly increases, the wind load increases, needs to reduce the antenna cross-sectional area as far as possible and reduces the wind load, will cause then that the low frequency unit produces the sheltering from to the high frequency unit, and then produces very big influence to the radiation performance of high frequency unit.
Therefore, it is necessary to improve the influence of the low frequency unit on the radiation performance of the high frequency unit in the above-mentioned multi-frequency antenna.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the decoupling device is provided for solving the problem that the low-frequency unit in the multi-frequency antenna in the prior art influences the radiation performance of the high-frequency unit.
In order to solve the technical problems, the utility model adopts the technical scheme that: a first aspect provides a decoupling device including a reflection plate, a first radiation element, a second radiation element, and a decoupling element; the first radiation assembly works in a first frequency band, and comprises a support column and a radiation arm, wherein the support column is mounted on one side of the reflecting plate, and the radiation arm extends outwards from the support column; the second radiation component works in a second frequency band, the second frequency band is higher than the first frequency band, and the second radiation component is installed on the reflecting plate and located on one side of the supporting column; the decoupling assembly comprises a conducting layer which is sleeved on the radiating arm and is spaced from the radiating arm, the conducting layer is provided with a plurality of radiating gaps, the radiating gaps can allow the electromagnetic waves of the first frequency band to pass through, and the radiating gaps can block the electromagnetic waves of the second frequency band from passing through.
Furthermore, the first frequency band is 690-.
Furthermore, the decoupling assembly further comprises a shell, the radiation arm is sleeved with the shell, and the conductive layer is attached to the outer layer of the shell or embedded in the shell.
Further, the housing has a polygonal prism or cylinder shape, the conductive layer includes a plurality of metal patches surrounding the radiation arm and arranged at intervals along a length direction of the radiation arm, and the radiation gap is formed between adjacent metal patches.
Further, the side length of the metal patch is 1/8 of the wavelength of the center frequency point of the second frequency band.
Further, the radiation arm comprises a first sub-arm and a second sub-arm, and the first sub-arm and the second sub-arm are vertically arranged in a staggered manner.
Further, the second radiation assembly includes a plurality of second radiation units disposed on the reflection plate, and each of the second radiation units is distributed around the support column.
The utility model provides an array antenna, which comprises a low-frequency isolation unit and at least two decoupling devices, wherein the low-frequency isolation unit is arranged between the decoupling devices, and the low-frequency isolation unit is used for isolating signals of low frequency bands of the adjacent decoupling devices.
Furthermore, the low-frequency isolation unit comprises the decoupling component and a low-frequency isolation strip, and the decoupling component is sleeved on the low-frequency isolation strip.
Further, the length of the low-frequency isolating strip is 1/2 of the wavelength of the center frequency point of the first frequency band.
The utility model has the beneficial effects that: firstly, a support column of a first radiation assembly and a second radiation assembly are respectively installed on a reflecting plate, wherein the first radiation assembly is used for working at a low-frequency section, the second radiation assembly is used for working at a high-frequency section, and then a decoupling assembly is sleeved on a radiation arm of the first radiation assembly, the decoupling assembly allows low-frequency electromagnetic wave signals to normally penetrate through the decoupling assembly, the high-frequency electromagnetic wave signals can only be diffracted and pass through the decoupling assembly and cannot penetrate into the decoupling assembly, so that the influence of the first radiation assembly on the performance of the second radiation assembly is reduced.
Drawings
The detailed structure of the utility model is described in detail below with reference to the accompanying drawings
Fig. 1 is a schematic structural diagram of an antenna according to the present invention.
Fig. 2 is a top view of an antenna of the present invention.
Fig. 3 is a schematic structural diagram of a decoupling device according to the present invention.
Fig. 4 is a schematic view of a first structure of a decoupling assembly in a decoupling device according to the present invention.
Fig. 5 is a second structural view of a decoupling assembly in a decoupling assembly according to the present invention.
Fig. 6 is a schematic view of a third structure of a decoupling assembly in a decoupling device according to the present invention.
Fig. 7 is a schematic structural diagram of an array antenna according to the present invention.
The reference numbers are as follows:
1-a reflector plate; 2-a first radiating element; 21-a support column; 22-a radiating arm; 221-a first sub-arm; 222-a second sub-arm; 3-a second radiating element; 4-a decoupling assembly; 41-a housing; 42-a conductive layer; 5-low frequency isolation bars.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna according to the present invention. Fig. 2 is a top view of an antenna of the present invention. Along with station antenna quantity constantly increases, and the wind load increases, needs to reduce the antenna cross-sectional area as far as possible and reduces the wind load, and the multifrequency antenna reduces the interval that the cross-section just need be drawn close low high frequency array, and along with the interval draws close, the low frequency unit can shelter from the high frequency unit, produces very big influence to the radiation performance of high frequency unit. In the prior art, decoupling is realized by additionally arranging a filter circuit on a low-frequency antenna radiating unit, but the effect is not ideal, and the matching design of the low-frequency radiating unit is easily influenced greatly. Therefore, there is a need to improve on the above-mentioned effects.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a decoupling device according to the present invention. A first embodiment of the present invention provides a decoupling device including a reflection plate 1, a first radiation element 2, a second radiation element 3, and a decoupling element 4; the first radiation element 2 operates in a first frequency band, and the first radiation element 2 includes a support pillar 21 mounted on one side of the reflector 1 and a radiation arm 22 extending outward from the support pillar 21; the second radiation element 3 operates in a second frequency band, the second frequency band is higher than the first frequency band, and the second radiation element 3 is installed on the reflection plate 1 and located on one side of the support column 21; the decoupling assembly 4 includes a conductive layer 42 sleeved on the radiating arm 22 and spaced apart from the radiating arm 22, the conductive layer 42 has a plurality of radiation gaps, the radiation gaps can allow the electromagnetic wave of the first frequency band to pass through, and the radiation gaps can block the electromagnetic wave of the second frequency band from passing through.
Firstly, a support column 21 of a first radiation component 2 and a second radiation component 3 are respectively installed on a reflecting plate 1, wherein the first radiation component 2 is used for working in a low-frequency band, the second radiation component 3 is used for working in a high-frequency band, and then a decoupling component 4 is sleeved on a radiation arm 22 of the first radiation component 2, the decoupling component 4 allows low-frequency electromagnetic wave signals to normally penetrate through, high-frequency electromagnetic signals can only be diffracted and pass, and the high-frequency electromagnetic signals cannot penetrate into the decoupling component 4, so that the influence of the first radiation component 2 on the performance of the second radiation component 3 is reduced.
Furthermore, the first frequency band is 690-. In this embodiment, the setting of the width of the radiation gap is changed according to the adjustment of the ranges of the first frequency band and the second frequency band, and further, the width of the radiation gap may be 0.5 mm.
Optionally, referring to fig. 4, fig. 4 is a schematic structural diagram of a decoupling assembly in a decoupling device according to the present invention. The decoupling assembly 4 further includes a housing 41, the housing 41 is sleeved on the radiating arm 22, and the conductive layer 42 is attached to an outer layer of the housing 41 or embedded inside the housing 41. The housing 41 has a polygonal prism or cylinder shape, and the conductive layer 42 includes a plurality of metal patches surrounding the radiation arm 22 and arranged at intervals along the length direction of the radiation arm 22, and the radiation gap is formed between adjacent metal patches. The side length of the metal patch is 1/8 of the wavelength of the central frequency point of the second frequency band. The side length of the metal patch is 10-50 mm.
Specifically, by adjusting the range of the width of the radiation gap and limiting the side length of the metal patch, only the low-frequency band electromagnetic wave signals are allowed to normally penetrate through the metal patch, and the high-frequency band electromagnetic wave signals can only diffract and pass through the metal patch and cannot penetrate into the decoupling component 4, which is equivalent to the radiation arm 22 hiding the second radiation component 3, so that the influence of the first radiation component 2 on the performance of the second radiation component 3 is reduced.
Specifically, in this embodiment, the housing 41 is used as a support carrier for the conductive layer 42, the housing 41 is made of an insulating medium, the position of the conductive layer 42 is selected according to specific requirements, and the conductive layer 42 is attached to the outer layer of the housing 41 or embedded in the housing 41 to achieve the same effect. In addition, the shape of the housing 41 and the attaching manner of the metal patch are also limited in this embodiment, please refer to fig. 4, 5 and 6, and fig. 4 is a schematic view of a first structure of a decoupling assembly in a decoupling device according to the present invention. The housing 41 is a hollow tetrahedron, wherein the cross section of the tetrahedron has a side length of 25mm, the conductive layer 42 is located on four faces of the housing 41, the conductive layer 42 is composed of periodic metal patches, each face comprises 2 patches in the transverse direction and a plurality of patches in the longitudinal direction. Fig. 5 is a second structural view of a decoupling assembly in a decoupling assembly according to the present invention. In the embodiment, the insulating medium housing 41 is a hollow hexahedral structure, and other implementation forms are the same as those in fig. 4; fig. 6 is a schematic view of a third structure of a decoupling assembly in a decoupling device according to the present invention. In this embodiment, each surface has only one metal patch in the transverse direction, and other implementation forms are consistent with fig. 4. In this embodiment, only a few shapes of the housing and the attaching method of the metal patch are illustrated, and the practical application is not limited to the above-illustrated method.
Further, referring to fig. 3, the radiation arm 22 includes a first sub-arm 221 and a second sub-arm 222, and the first sub-arm 221 and the second sub-arm 222 are vertically staggered. The second radiation assembly 3 includes a plurality of second radiation units disposed on the reflective plate 1, and each of the second radiation units is distributed around the supporting column 21.
Specifically, in this embodiment, the radiation arm 22 includes two sub-arms, and in practical application, the number of the sub-arms may also be 1 or more, and the sub-arms are specifically set according to a specific frequency band. In this embodiment, the number of the second radiation units is four, and the second radiation units are symmetrically disposed on two sides of the support column 21, and the number of the second radiation units can be decreased according to specific needs in practical applications.
Alternatively, each of the first sub-arm 221 and the second sub-arm 222 is sleeved with a decoupling assembly 4, and each of the first sub-arm 221 and the second sub-arm 222 is located at a middle position of the decoupling assembly 4. The distance of the staggered center points of the first sub-arm 221 and the second sub-arm 222 from the center of each second radiation element is about 60 mm.
Further, please refer to fig. 7, fig. 7 is a schematic structural diagram of an array antenna according to the present invention. A second embodiment of the present invention provides an array antenna, which includes at least two decoupling devices as described above, and further includes a low-frequency isolation unit, where the low-frequency isolation unit is disposed between the decoupling devices, and the low-frequency isolation unit is used to isolate low-frequency band signals of adjacent decoupling devices. The low-frequency isolation unit comprises the decoupling component 4 and a low-frequency isolation strip 5, and the decoupling component 4 is sleeved on the low-frequency isolation strip 5. The length of the low-frequency isolating strip 5 is 1/2 of the wavelength of the central frequency point of the first frequency band. The length of the low-frequency isolating strip is 220 mm.
In particular, the implementation of decoupling assembly 4 in this embodiment may be identical to decoupling assembly 4 in the first embodiment. In this embodiment, the number of decoupling devices is 2, low-frequency isolation strips 5 are arranged between the decoupling devices, the low-frequency isolation strips 5 are at the same height with the radiation surface of the decoupling devices, the low-frequency isolation strips 5 can reduce the mutual influence between the first radiation components 2, decoupling components 4 are sleeved outside the low-frequency isolation strips 5, and the influence of the low-frequency isolation strips 5 on the performance of the second radiation components 3 can be effectively reduced by adding the decoupling components 4 on the low-frequency isolation strips 5.
In summary, according to the decoupling device and the array antenna provided by the present invention, the decoupling element 4 is sleeved on the radiating arm of the first radiating element 2 working at the low frequency band, so that the influence of the first radiating element 2 on the performance of the second radiating element 3 working at the high frequency band can be effectively reduced. The mutual influence between the first radiation components 2 in the decoupling device is reduced by arranging the low-frequency isolating strips 5 between the decoupling devices, and the influence of the low-frequency isolating strips 5 on the performance of the second radiation components 3 can be effectively reduced by sleeving the decoupling components 4 on the low-frequency isolating strips.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A decoupling device, characterized by: the radiation module comprises a reflecting plate, a first radiation assembly, a second radiation assembly and a decoupling assembly; the first radiation assembly works in a first frequency band, and comprises a support column and a radiation arm, wherein the support column is mounted on one side of the reflecting plate, and the radiation arm extends outwards from the support column; the second radiation component works in a second frequency band, the second frequency band is higher than the first frequency band, and the second radiation component is installed on the reflecting plate and located on one side of the supporting column; the decoupling assembly comprises a conducting layer which is sleeved on the radiating arm and is spaced from the radiating arm, the conducting layer is provided with a plurality of radiating gaps, the radiating gaps can allow the electromagnetic waves of the first frequency band to pass through, and the radiating gaps can block the electromagnetic waves of the second frequency band from passing through.
2. A decoupling device as claimed in claim 1, characterized in that: the first frequency range is 690-960 MHz, the second frequency range is 1695-2690 MHz, and the width of the radiation gap is 0.3-1 mm.
3. A decoupling device as claimed in claim 1, characterized in that: the decoupling assembly further comprises a shell, the shell is sleeved on the radiating arm, and the conductive layer is attached to the outer layer of the shell or embedded in the shell.
4. A decoupling device as claimed in claim 3, characterized in that: the shape of the shell is a polygonal prism or a cylinder, the conductive layer comprises a plurality of metal patches which surround the radiation arm and are arranged at intervals along the length direction of the radiation arm, and the radiation gap is formed between every two adjacent metal patches.
5. A decoupling device as claimed in claim 4, characterized in that: the side length of the metal patch is 1/8 of the wavelength of the central frequency point of the second frequency band.
6. A decoupling device as claimed in claim 1, characterized in that: the radiation arm comprises a first sub-arm and a second sub-arm, and the first sub-arm and the second sub-arm are vertically arranged in a staggered mode.
7. A decoupling device as claimed in claim 1, characterized in that: the second radiation assembly comprises a plurality of second radiation units arranged on the reflecting plate, and the second radiation units are distributed around the supporting column.
8. An array antenna, comprising a low frequency isolation unit and at least two decoupling devices according to any one of claims 1 to 7, wherein the low frequency isolation unit is disposed between the decoupling devices, and the low frequency isolation unit is configured to isolate signals in a low frequency band adjacent to the decoupling devices.
9. The array antenna of claim 8, wherein: the low-frequency isolation unit comprises the decoupling component and a low-frequency isolation strip, and the decoupling component is sleeved on the low-frequency isolation strip.
10. The array antenna of claim 9, wherein: the length of the low-frequency isolating strip is 1/2 of the wavelength of the central frequency point of the first frequency band.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121419778.8U CN215989216U (en) | 2021-06-24 | 2021-06-24 | Decoupling device and array antenna |
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| CN202121419778.8U CN215989216U (en) | 2021-06-24 | 2021-06-24 | Decoupling device and array antenna |
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| CN215989216U true CN215989216U (en) | 2022-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115173062A (en) * | 2022-09-08 | 2022-10-11 | 北京信诺飞图科技有限公司 | High-gain high-isolation miniaturized airborne Beidou anti-interference array antenna |
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2021
- 2021-06-24 CN CN202121419778.8U patent/CN215989216U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115173062A (en) * | 2022-09-08 | 2022-10-11 | 北京信诺飞图科技有限公司 | High-gain high-isolation miniaturized airborne Beidou anti-interference array antenna |
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