CN112421229A - Antenna decoupling device, antenna array and terminal - Google Patents
Antenna decoupling device, antenna array and terminal Download PDFInfo
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- CN112421229A CN112421229A CN201910786001.6A CN201910786001A CN112421229A CN 112421229 A CN112421229 A CN 112421229A CN 201910786001 A CN201910786001 A CN 201910786001A CN 112421229 A CN112421229 A CN 112421229A
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- antenna
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- interdigital
- decoupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
Abstract
The invention provides an antenna decoupling device, an antenna array and a terminal, which are characterized by comprising the following components: the antenna comprises an annular interdigital structure on a surface layer and a T-shaped structure on a bottom layer, wherein the two structures are connected through a short-circuit column, current on an antenna array is coupled to the annular interdigital structure and reaches the T-shaped structure on the bottom layer through the annular interdigital structures on two sides through the short-circuit column, when the distance from the antenna array to a middle branch of the T-shaped structure is half wavelength, the current at the tail end of the T-shaped structure is zero, and the coupled current between the two antennas is neutralized, so that the distance between the interdigital structure and the T-shaped structure and the position of the short-circuit column are adjusted, electric waves among the antennas can be filtered, the electric waves radiated by one antenna are reduced and absorbed by other antennas, the mutual coupling among the antenna radiations is reduced, the isolation between the antennas is improved, the antenna can be conveniently applied to mobile terminal equipment, and the defects in the prior art are alleviated.
Description
Technical Field
The invention relates to the field of 5G, the field of communication and the field of signal detection, in particular to an antenna decoupling device, an antenna array and a terminal.
Background
With the rapid development and maturity of the current 4G (fourth generation communication system), the shortage of frequency resources, the huge energy consumption and the optimization problem of the network, some emerging mobile communication services put new demands on the development of the mobile communication network, and the research and development of the 5G (fifth generation communication system) are promoted due to wider frequency band bandwidth, higher-rate data communication service, ultrahigh connection number density, ultralow time delay and the like. 5G communication providing data service of a plurality of GB levels brings a completely new experience to users. In a terminal capable of supporting a 5G communication system, a currently popular 4G LTE communication system will be reserved, and in future terminals, 4G LTE will coexist with 5G. This undoubtedly puts higher demands on the intelligent terminal device, which is compatible with the 5G communication band and includes a MIMO antenna array in terms of air interface, and is one of the most important technologies to solve the exponential growth problem of wireless data services by using spatial multiplexing and mitigating interference. To integrate a large-scale MIMO antenna array in a terminal product, the mutual coupling is severe, the interference is large, the efficiency of the whole antenna is reduced, and even the performance index of a 5G system is directly affected. Therefore, the key to improving the isolation between the antennas is the 5G antenna array.
At present, the research on 5G antenna arrays applicable to mobile terminals has focused on the miniaturization, multi-band, and isolation of antennas. It is difficult to place a plurality of antennas in a small-sized hand-held terminal such as a mobile phone because the size of the mobile phone itself is small and the distance between antenna units placed in the mobile phone is small, and thus, currents flow between the antennas and the mobile phone floor so that a strong mutual coupling effect exists between them, thereby affecting the efficiency of the antennas. Therefore, the decoupling between the antenna units is also one of the research focuses of the 5G antenna array.
The existing method for improving the isolation degree between the antennas comprises the following steps: the method comprises a neutral line decoupling method, a floor seam opening method, a floor branch method, a decoupling network method and the like, wherein the isolation problem solved by the methods is limited, and the interference between the antennas cannot be completely inhibited.
The MIMO antenna array for 5G communication at present requires more antennas, and the integration of more antennas on the limited size is difficult to realize, so the requirement on the antenna isolation is higher.
Aiming at the problem of high isolation among antenna arrays which is urgently needed to be solved, the existing scheme is difficult to effectively solve the problems of increased number of limited space antennas and strong mutual coupling effect in the 5G communication era. 4G, 5G transition stage, high frequency, low frequency antenna coexistence, a plurality of channel antenna coexistence not only need solve the size problem, can be continuous each other produce signal interference, the mutual coupling effect between the antenna becomes strong, a plurality of antennas bring the signal interference constantly, the problem of mutual coupling effect reinforcing will seriously influence communication effect and user experience.
Disclosure of Invention
In order to solve the problems of coexistence of two systems, continuous signal interference caused by a plurality of antennas and enhanced mutual coupling effect in the prior art, an embodiment of the present invention provides an antenna decoupling device, an antenna array and a terminal, and according to an embodiment of the present invention, an antenna decoupling device is provided, which is characterized by comprising:
a first structure disposed on a first level, the first structure comprising a plurality of inter-digitated units;
a second structure disposed on a second level, the second structure including a plurality of connection ends, wherein the plurality of connection ends correspond to the plurality of inter-digitated units in the first structure;
the short-circuit column is arranged between the first layer and the second layer and is used for connecting the interdigital unit and the corresponding connecting end;
the first level and the second level are used to indicate different levels in the antenna.
Optionally, the first structure includes a plurality of inter-digitating units, including:
the interdigital structure is an annular interdigital structure; the annular interdigital structure is a square annular interdigital structure, a rhombic annular interdigital structure, a circular annular interdigital structure or other annular interdigital structures.
Optionally, the second structure comprises a plurality of connection ends, including:
the second structure is T-shaped, or two L-shaped structures form a structure similar to the T-shaped structure;
the T-shaped or L-shaped transverse two ends and the vertical two ends form a connecting end.
Optionally, the short-circuiting columns are used for connecting the interdigital units with the corresponding connecting ends, and include:
the position of the shorting post between the first and second structures may be adjusted to select the location where the decoupling effect is best.
According to an embodiment of the present invention, there is provided an antenna array characterized by the antenna and decoupling device as described in any one of the above, wherein the antenna array comprises at least two antennas, and the decoupling device is installed between any two of the antennas.
Optionally, the antenna comprises a 4G antenna, a 5G antenna, or other antenna;
optionally, one or more decoupling structures are mounted between any two of the antennas simultaneously.
According to an embodiment of the present invention, there is provided a terminal, including the apparatus as in any one of the above, wherein the apparatus is mounted to the terminal.
According to the antenna decoupling device, the antenna array and the terminal provided by the embodiment of the invention, the decoupling device is composed of two layers of structures and comprises the following components: the antenna comprises an annular interdigital structure on a surface layer and a T-shaped structure on a bottom layer, wherein the two structures are connected through a short-circuit column, current on an antenna array is coupled to the annular interdigital structure and reaches the T-shaped structure on the bottom layer through the annular interdigital structures on two sides through the short-circuit column, when the distance from the antenna array to a middle branch of the T-shaped structure is half wavelength, the current at the tail end of the T-shaped structure is zero, and the coupled current between the two antennas is neutralized, so that the distance between the interdigital structure and the T-shaped structure and the position of the short-circuit column are adjusted, electric waves among the antennas can be filtered, the electric waves radiated by one antenna are reduced and absorbed by other antennas, the mutual coupling among the antenna radiations is reduced, the isolation between the antennas is improved, the antenna can be conveniently applied to mobile terminal equipment, and the defects in the prior art are alleviated. The high-isolation decoupling device for the antenna, which is designed by the invention, has the advantages of simple structure, small size, convenience in adjustment, low cost, strong operability, easiness in realization, good effect and high cost performance, and the defects of the prior art are overcome.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic perspective view of an antenna decoupling structure according to an embodiment of the invention;
fig. 2 is a schematic diagram of a first structure of a surface layer of an antenna decoupling structure according to an embodiment of the invention;
fig. 3 is a schematic diagram of a second structure of an underlying antenna decoupling structure according to an embodiment of the invention;
fig. 4 is a schematic top view of an antenna decoupling structure according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a second double L-shaped structure according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a top view of an antenna array configuration according to an embodiment of the present invention;
fig. 7 is a schematic top view of an antenna according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
An embodiment of the present invention provides an antenna decoupling device, and fig. 1 is a schematic perspective view of an antenna decoupling structure according to an embodiment of the present invention, as shown in fig. 1, the antenna decoupling device is characterized by including:
a first structure provided on a first layer 6, the first structure comprising a plurality of inter-digitated units 1, 2;
a second structure 3 arranged at a second level, the second structure comprising a plurality of connection ends 31, 32, 33, wherein the plurality of connection ends correspond to the plurality of inter-digital units in the first structure;
the short-circuit columns 4 and 5 are arranged between the first layer and the second layer and are used for connecting the interdigital units and the corresponding connecting ends;
the first level and the second level are used to indicate different levels in the antenna.
Optionally, the first structure includes a plurality of interdigital units 1 and 2, fig. 2 is a schematic diagram of a first structure of a surface layer of an antenna decoupling structure according to an embodiment of the present invention, as shown in fig. 2, and the first structure includes:
the interdigital structures 1 and 2 are annular interdigital structures; the annular interdigital structure is a square annular interdigital structure, a rhombic annular interdigital structure, a circular annular interdigital structure or other annular interdigital structures. The present invention is not limited to the specific shape of the interdigital structure, and the interdigital units having the above-described functions are all adapted to the embodiments of the present invention.
Optionally, the second structure 3 includes a plurality of connection ends 31, 32, and 33, and fig. 3 is a schematic diagram of a second structure of a bottom layer of the antenna decoupling structure according to the embodiment of the present invention, as shown in fig. 3, and the second structure is characterized by including:
the second structure 3 is T-shaped;
the two transverse ends of the T-shape and the one vertical end constitute the connection ends 31, 32, 33.
Fig. 3 is a schematic view of an embodiment of the present invention, and does not limit the details of the shape of the second structure 3, and the structures capable of providing the functions are all suitable for the embodiment of the present invention.
An embodiment of the present invention provides an antenna decoupling device, and fig. 4 is a schematic plan view of an antenna decoupling structure according to an embodiment of the present invention, as shown in fig. 4, the antenna decoupling structure includes:
the interdigital units 1 and 2 are respectively connected to different connection ends of the second structure 3, and fig. 4 is only a schematic diagram of an embodiment of the present invention, and does not limit the arrangement positions of the interdigital units and the second structure.
Fig. 5 is a schematic diagram of a second structure of a double-L shape according to an embodiment of the present invention, as shown in fig. 5, including:
the shape of the second structure 3 is a structure similar to a T shape and formed by two L-shaped structures;
the two horizontal ends of the double L-shape and the two vertical ends constitute the connection ends 31, 32, 33.
Fig. 5 is a schematic view of an embodiment of the present invention, and does not limit the details of the shape of the second structure 3, and the structures capable of providing the functions described above are all suitable for the embodiment of the present invention.
Optionally, the short-circuiting pillars 4 and 5 are used for connecting the interdigital units 1 and 2 with the corresponding connecting terminals 31, 32 and 33, and include:
the position of the shorting pillars 4, 5 between the first and second structures may be adjusted to select the position where the decoupling effect is optimal.
According to an embodiment of the present invention, there is provided an antenna array, and fig. 6 is a schematic top view of an antenna array structure according to an embodiment of the present invention, as shown in fig. 6, including:
the antenna and decoupling assembly of any one of the above claims, wherein said antenna array comprises at least two antennas, said decoupling assembly being mounted between any two of said antennas.
Optionally, the antenna comprises a 4G antenna, a 5G antenna, or other antenna;
optionally, one or more decoupling structures are mounted between any two of the antennas simultaneously.
As shown in fig. 6, the decoupling structure is added between the antennas of the end product, which helps to improve the isolation between the antennas. Can be flexibly adjusted according to the layout of the product. The terminal illustrated in fig. 6 supports 6 antennas, where the structures of the antennas 1 and 2 are shown in the figure, and the remaining antennas are not determined in form and are designed according to the requirements of the terminal. Fig. 6 is a schematic diagram of the embodiment of the present invention, and details such as the number and the arrangement position of the antennas and the decoupling structures are not limited, and the antenna arrays with the functions are all suitable for the embodiment of the present invention.
According to an embodiment of the present invention, there is provided a terminal, including the apparatus as in any one of the above, wherein the apparatus is mounted to the terminal. The terminal comprises means comprising the functionality as described in any of the above.
The present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
According to one embodiment of the invention, electromagnetic simulation software is used for simulation analysis of the antenna decoupling structure designed by the invention. The size of the dielectric plate in the decoupling device is 40mm x 20mm, a Rogers RT5880 dielectric plate is adopted, the dielectric constant is epsilon r which is 2.2, and the loss tangent tan delta is 0.0009. The size of the annular interdigital structures 1 and 2 is determined by a quarter wavelength of the working frequency of the antenna. If the antenna operates at 3.3GHz-5GHz with the center frequency of 4.15GHz, the electrical length of the antenna is 12.2mm, so that the four sides of the annular interdigital structures 1 and 2 are about 3mm respectively. The length of the short-circuit posts 4 and 5 and the distance from the T-shaped structure are determined by half wavelength of the working frequency of the antenna, and the isolation between the antennas can be optimized by adjusting the positions of the short-circuit posts 4 and 5 and the distance from the tail end of the T-shaped structure.
The decoupling structure of the surface layer and the bottom layer of the dielectric plate can adopt a PCB copper-clad form, and the dielectric plate can adopt Rogers RT5880, polytetrafluoroethylene FR4 and the like. The materials with the functions are all suitable for the embodiment of the invention, and the invention does not limit the device, the manufacturing process of the structure, the materials and the like.
According to an embodiment of the present invention, there is provided an antenna array, and fig. 7 is a schematic top view of an antenna according to an embodiment of the present invention, as shown in fig. 7, which includes:
the antenna in the schematic diagram 7 is composed of an inverted L-shaped branch 7 and an F-shaped branch 9, the antenna 1 works at 3.3GHz-4.2GHz, 4.4GHz-5GHz and 2.5-2.7GHz, wherein the inverted L-shaped branch 7 works at 2.5-2.7GHz, and the F-shaped branch 9 works at two frequency bands of 3.3GHz-4.2GHz and 4.4GHz-5 GHz. The length of the antenna is adjusted according to the operating frequency, and the size of the antenna is determined by a quarter wavelength of the operating frequency. The shorting post at the end of the inverted-L antenna 7 is grounded to the bottom layer, thereby increasing the operating bandwidth of the antenna. The novel decoupling structure is loaded between the two antennas, electric waves between the antennas are filtered, and the electric waves radiated by the antennas 1 are reduced and absorbed by the antennas 2, so that mutual coupling between the two antenna radiations is reduced, and the isolation between the antennas is improved. Fig. 7 is a schematic diagram of the embodiment of the present invention, and details such as the shape of the antenna, the number of the antenna and the decoupling structure, the arrangement position, and the like are not limited, and both the antenna and the antenna array having the functions described above are suitable for the embodiment of the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An antenna decoupling device, comprising:
a first structure disposed on a first level, the first structure comprising a plurality of inter-digitated units;
a second structure disposed on a second level, the second structure including a plurality of connection ends, wherein the plurality of connection ends correspond to the plurality of inter-digitated units in the first structure;
the short-circuit column is arranged between the first layer and the second layer and is used for connecting the interdigital unit and the corresponding connecting end;
the first level and the second level are used to indicate different levels in the antenna.
2. The structure of claim 1, wherein the first structure comprises a plurality of interdigitated finger units comprising:
the interdigital structure is an annular interdigital structure; the annular interdigital structure is a square annular interdigital structure, a rhombic annular interdigital structure, a circular annular interdigital structure or other annular interdigital structures.
3. The structure of claim 1, wherein the second structure comprises a plurality of connection ends, comprising:
the second structure is T-shaped, or two L-shaped structures form a structure similar to the T-shaped structure;
the T-shaped or L-shaped transverse two ends and the vertical two ends form a connecting end.
4. The structure of claim 1, wherein the shorting bar is configured to connect the interdigital cells to the corresponding connection terminals, and comprises:
the position of the shorting post between the first and second structures may be adjusted to select the location where the decoupling effect is best.
5. An antenna array employing the antenna and decoupling assembly of any one of claims 1 to 4, wherein said antenna array comprises at least two antennas, and said decoupling assembly is mounted between any two of said antennas.
6. The apparatus of claim 5, wherein the antenna comprises a 4G antenna, a 5G antenna, or other antenna.
7. The apparatus of claim 5, wherein one or more decoupling structures are mounted between any two of the antennas simultaneously.
8. A terminal comprising the apparatus of claim 5, wherein the apparatus is mounted to the terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786001.6A CN112421229A (en) | 2019-08-23 | 2019-08-23 | Antenna decoupling device, antenna array and terminal |
| PCT/CN2020/086953 WO2021036312A1 (en) | 2019-08-23 | 2020-04-26 | Antenna decoupling apparatus, antenna array, and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786001.6A CN112421229A (en) | 2019-08-23 | 2019-08-23 | Antenna decoupling device, antenna array and terminal |
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| Publication Number | Publication Date |
|---|---|
| CN112421229A true CN112421229A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910786001.6A Pending CN112421229A (en) | 2019-08-23 | 2019-08-23 | Antenna decoupling device, antenna array and terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112421229A (en) |
| WO (1) | WO2021036312A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193383A (en) * | 2021-05-10 | 2021-07-30 | 南京智能高端装备产业研究院有限公司 | Plane filtering yagi antenna using absorption branch knot |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2151890A1 (en) * | 2008-08-07 | 2010-02-10 | Laird Technologies AB | Antenna arrangement for a portable radio communication device, and portable radio communication device comprising such an antenna arrangement |
| EP3373390B1 (en) * | 2015-12-03 | 2021-09-01 | Huawei Technologies Co., Ltd. | Multi-frequency communication antenna and base station |
| CN107528123A (en) * | 2016-06-22 | 2017-12-29 | 中兴通讯股份有限公司 | A kind of decoupling device |
| CN106532248B (en) * | 2016-12-09 | 2023-03-31 | 桂林电子科技大学 | Ultra-compact microstrip patch array antenna |
| CN206742495U (en) * | 2017-03-14 | 2017-12-12 | 中兴通讯股份有限公司 | Antenna and terminal |
-
2019
- 2019-08-23 CN CN201910786001.6A patent/CN112421229A/en active Pending
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2020
- 2020-04-26 WO PCT/CN2020/086953 patent/WO2021036312A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193383A (en) * | 2021-05-10 | 2021-07-30 | 南京智能高端装备产业研究院有限公司 | Plane filtering yagi antenna using absorption branch knot |
| CN113193383B (en) * | 2021-05-10 | 2022-05-17 | 南京智能高端装备产业研究院有限公司 | Plane filtering yagi antenna using absorption branch knot |
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| WO2021036312A1 (en) | 2021-03-04 |
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