CN113471718A - Different-frequency self-decoupling millimeter wave array antenna - Google Patents
Different-frequency self-decoupling millimeter wave array antenna Download PDFInfo
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- CN113471718A CN113471718A CN202110531855.7A CN202110531855A CN113471718A CN 113471718 A CN113471718 A CN 113471718A CN 202110531855 A CN202110531855 A CN 202110531855A CN 113471718 A CN113471718 A CN 113471718A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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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
Abstract
The invention discloses a pilot frequency self-decoupling millimeter wave array antenna, which comprises: a radiating antenna array arranged in a predetermined arrangement; the radiation antenna array comprises at least two high-frequency radiation antenna units and at least one low-frequency radiation antenna unit; the predetermined arrangement is to place one low-frequency radiating antenna element between two adjacent high-frequency radiating antenna elements. According to the arrangement mode, the distance between the low-frequency antenna and the high-frequency antenna and the size of the low-frequency antenna are adjusted, so that the coupling between the two high-frequency antenna units can be obviously reduced under the condition that the radiation antenna array interval is kept to be constant; meanwhile, the placed low-frequency radiation antenna units can also work normally, and the coverage frequency band of the whole array is increased; the self-decoupling method realizes the isolation improvement between the high-frequency antennas without additional circuits and structures, and can expand the working frequency range of the whole millimeter wave array through the compact arrangement of the high-frequency and low-frequency antennas.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and relates to a different-frequency self-decoupling millimeter wave multi-port array antenna.
Background
The applied millimeter wave technology is a hot topic of academia and industry, and a globally uniform millimeter wave frequency band is determined for International Mobile Telecommunications (IMT) in a radio communication conference in the 2019 world (WRC-19), wherein the currently globally main 5G millimeter wave frequency bands are 24.25-27.5 GHz, 37-43.5 GHz, 45.5-47 GHz, 47.2-48.2 GHz and 66-71 GHz. In a mobile terminal, due to the Sub-6GHz antenna, the existence of a metal baffle and a screen, the space of a millimeter wave array is very limited, and therefore, higher requirements are put forward on the millimeter wave multiband coverage, miniaturization and high-isolation antenna array.
With the development of communication technology, the design of millimeter wave antennas is being researched by more and more scholars and companies, but a single millimeter wave antenna unit cannot meet the requirements of mobile communication, so that a unit antenna array is required to obtain higher gain. With the introduction of antenna arrays, the isolation of antenna arrays is an important indicator, and with the decrease of antenna clearance and mutual spacing, the problem of coupling between antenna elements becomes a difficult point. Because the distance between the antenna units is close, the direct isolation between the antenna units is improved, the interference is enhanced, the data throughput rate is directly influenced, and the energy capable of being effectively radiated is reduced due to strong coupling, so that the antenna array gain is reduced, and the energy utilization efficiency is low; therefore, achieving multiband coverage and ensuring a good isolation effect of the millimeter wave antenna array in a small volume becomes a problem of attention in designing the millimeter wave antenna array.
Disclosure of Invention
The invention aims to: the different-frequency self-decoupling millimeter wave array antenna is provided, and multi-band coverage and good isolation of millimeter waves are achieved in a small size on the premise that other decoupling means are not additionally added.
The technical scheme of the invention is as follows: a inter-frequency self-decoupling millimeter wave array antenna comprising: a radiating antenna array arranged in a predetermined arrangement; the radiating antenna array comprises at least two high-frequency radiating antenna units and at least one low-frequency radiating antenna unit; the predetermined arrangement mode is that one low-frequency radiation antenna unit is arranged between two adjacent high-frequency radiation antenna units.
By arranging a low-frequency antenna unit between two high-frequency antenna units, and adjusting the distance between the low-frequency radiation antenna unit and the high-frequency radiation antenna unit and the size of the low-frequency radiation antenna unit, the coupling between the two high-frequency radiation antenna units can be obviously reduced under the condition of keeping a certain radiation antenna array interval; meanwhile, the placed low-frequency radiation antenna units can also work normally, and the coverage frequency band of the whole array is increased; the self-decoupling method realizes the improvement of the isolation between the high-frequency radiating antenna units without additional circuits and structures, and can expand the working frequency range of the whole millimeter wave array through the compact arrangement of the high-frequency and low-frequency radiating antenna units; the millimeter wave array antenna with the arrangement mode has the advantages of simple design process, lower cost, stable structure, mature processing technology, high yield and suitability for large-scale production.
The further technical scheme is as follows: the lower part of the radiation antenna array sequentially comprises a first medium substrate, a first metal stratum, a second medium substrate and a second metal stratum; the second medium substrate is provided with a metalized through hole; the second metal formation is used to weld a joint for connecting test equipment or a millimeter wave front.
The double-layer metal ground is arranged, so that the structure of the first metal ground layer cannot be influenced when the radiation antenna array is connected with the test equipment, and the metallized through holes are formed in the second medium substrate, so that the first metal ground layer and the second metal ground layer are in good contact, and the radiation antenna array can be ensured to have a complete radiation grounding plate.
The further technical scheme is as follows: further comprising: a feed column; one end of the feed column is connected with the radiation antenna array, sequentially penetrates through the first dielectric substrate, the first metal stratum and the second dielectric substrate, and the other end of the feed column is connected with a welding part of an upper joint of the second metal stratum.
The feed column is used for connecting the radiation antenna array and the welding part of the joint on the second metal ground layer, so that the radiation antenna array penetrates through the dielectric substrate and the metal bottom layer to be connected with the joint.
The further technical scheme is as follows: each high-frequency radiation antenna unit and each low-frequency radiation antenna unit are respectively connected with one feed column.
By connecting each antenna unit with one feed column, the feed columns among the antenna units can be kept independent.
The further technical scheme is as follows: the original coupling of the high-frequency radiation antenna unit is the first coupling, the added low-frequency radiation antenna unit absorbs part of the first coupling, part of the first coupling is transferred to the second coupling between the high-frequency and low-frequency antenna units, and the total coupling energy is basically kept unchanged.
Because the working frequency difference of the high-frequency and low-frequency antenna units is far, the newly introduced second coupling is still in an acceptable range, and meanwhile, the good working state of the newly added low-frequency radiation antenna unit is ensured.
Drawings
The invention is further described with reference to the following figures and examples:
fig. 1 is a top view of a pilot frequency self-decoupling millimeter wave array antenna provided in the present application;
fig. 2 is a cross-sectional view of a pilot frequency self-decoupling millimeter wave array antenna provided by the present application;
fig. 3 is a schematic diagram of a pilot frequency self-decoupling millimeter wave array antenna provided in the present application;
fig. 4 is a schematic diagram of a principle of a pilot frequency self-decoupling millimeter wave array antenna provided in the present application;
fig. 5 is a schematic diagram of S parameter response of the inter-frequency self-decoupling millimeter wave array antenna provided by the present application.
Wherein: 1. a high-frequency antenna unit; 2. a low frequency antenna unit; 3. the connection position of the feed column and the antenna unit; 4. a dielectric plate; 5. metallizing the through-hole; 6. a feed column; 7. a first metal formation; 8. a second metal formation; 9. a first dielectric substrate; 10. a second dielectric substrate.
Detailed Description
Example (b): in the millimeter wave array antenna system, multiband coverage and isolation improvement between antenna units need to be considered: (1) how to design the structure of the antenna unit so that it covers the operation of multiple frequency bands; (2) due to the complexity of the antenna array design at the present stage, how to improve the isolation between the antenna arrays without adding other decoupling structures.
Based on the above problem, the present application provides a different-frequency self-decoupling millimeter wave array antenna, which, with reference to fig. 1 to 5, includes: and the radiating antenna arrays are arranged according to a preset arrangement mode.
The radiation antenna array comprises at least two high-frequency radiation antenna units 1 and at least one low-frequency radiation antenna unit 2; the predetermined arrangement is such that one low-frequency radiating antenna element 2 is placed between two adjacent high-frequency radiating antenna elements 1.
In practical application, for the high-frequency and low-frequency radiation antenna units arranged in a preset arrangement mode, the coupling between the two high-frequency radiation antenna units 1 can be obviously reduced under the condition of keeping a certain radiation antenna array interval by adjusting the distance between the low-frequency radiation antenna unit 2 and the high-frequency radiation antenna unit 1 and adjusting the size of the low-frequency radiation antenna unit 2.
The low-frequency radiating antenna unit 2 can work normally, and the coverage frequency band of the whole array is increased.
For the self-decoupling arrangement mode, the isolation between the high-frequency radiation antenna units 1 is improved without extra circuits and structures, and the working frequency range of the whole millimeter wave array can be expanded through the compact arrangement of the high-frequency and low-frequency radiation antenna units.
As shown in fig. 1, in practical application, the radiating antenna array is arranged on the dielectric plate 4.
Referring to fig. 2 in combination, the lower portion of the radiating antenna array sequentially includes a first dielectric substrate 9, a first metal ground layer 7, a second dielectric substrate 10, and a second metal ground layer 8.
The second dielectric substrate 10 is provided with a metalized through hole 5.
The second metal formation 8 is used to weld joints for connecting test equipment or a millimeter wave front.
The pilot frequency self-decoupling millimeter wave array antenna further comprises: a feed column 6; one end of the feed column 6 is connected with the radiation antenna array, sequentially penetrates through the first dielectric substrate 9, the first metal ground layer 7 and the second dielectric substrate 10, and the other end of the feed column is connected with the welding position of the upper joint of the second metal ground layer 8.
Illustratively, the diameter of the feed post 6 (feed probe) is designed to be 0.15mm for ease of processing. In terms of both industrial processing and practical cost, the first dielectric substrate 9 and the second dielectric substrate 10 both adopt Rogers RT4350 with the industry standard thickness, and simultaneously use Rogers RO4450F as the bonding layer of the upper and lower dielectric substrates, and the sizes of the first dielectric substrate 9, the first metal ground 7, the second dielectric substrate 10 and the second metal ground layer 8 are consistent.
Because the millimeter wave test connector needs to be connected to the metal ground, in order to avoid damaging the metal ground connected with the radiation antenna array, a second metal ground layer is added to the bottom of the first metal ground layer 7, the upper metal ground layer is intact, and the lower metal ground layer is used for connecting the connector for testing.
The feed column 6 is connected to the high-frequency radiating antenna element 1 and the low-frequency radiating antenna element 2, and exemplarily, the circled portion in fig. 1 represents a connection position 3 of the feed column and the antenna element. Optionally, each high-frequency radiation antenna unit 1 and each low-frequency radiation antenna unit 2 are respectively connected to a feed column 6, one end of the feed column 6 is connected to the high-frequency radiation antenna unit 1 or the low-frequency radiation antenna unit 2, and the other end is connected to the second metal ground layer 8.
As shown in fig. 4, the original coupling of the high-frequency radiating antenna unit 1 is the first coupling a, a part of the original coupling is absorbed by adding the low-frequency radiating antenna unit 2, and a part of the first coupling a is transferred to the second coupling B between the high-frequency and low-frequency antenna units, so that the overall coupling energy is basically kept unchanged, and because the working frequency difference of the high-frequency and low-frequency antenna units is relatively long, the newly introduced second coupling B is still in an acceptable range, and simultaneously, the good working state of the newly added low-frequency radiating antenna unit 2 is ensured.
The pilot frequency self-decoupling millimeter wave array antenna provided by the application has the advantages that S parameter response is shown schematically in fig. 5, at a high frequency f2, the isolation can be effectively improved by using the preset arrangement mode provided by the application, namely, the mode that one low-frequency radiation antenna unit 2 is arranged between two high-frequency radiation antenna units 1, and meanwhile, the low-frequency radiation antenna unit 2 also has good radiation performance.
The application provides a pilot frequency self-decoupling millimeter wave array antenna, applicable in terminal equipment's millimeter wave frequency channel communication for prepare intelligent mobile terminal, wireless router etc. on product and the system.
In summary, the inter-frequency self-decoupling millimeter wave array antenna provided by the application has the advantages that the coupling between the two high-frequency radiation antenna units can be obviously reduced by arranging the low-frequency antenna units between the two high-frequency antenna units, and by adjusting the distance between the low-frequency radiation antenna units and the high-frequency radiation antenna units and the size of the low-frequency radiation antenna units, under the condition of keeping the radiation antenna array interval to be constant; meanwhile, the placed low-frequency radiation antenna units can also work normally, and the coverage frequency band of the whole array is increased; the self-decoupling method realizes the improvement of the isolation between the high-frequency radiating antenna units without additional circuits and structures, and can expand the working frequency range of the whole millimeter wave array through the compact arrangement of the high-frequency and low-frequency radiating antenna units; the millimeter wave array antenna with the arrangement mode has the advantages of simple design process, lower cost, stable structure, mature processing technology, high yield and suitability for large-scale production.
In addition, the double-layer metal ground is arranged, so that the structure of the first metal ground layer cannot be influenced when the radiation antenna array is connected with the test equipment, and the metallized through holes are formed in the second medium substrate, so that the first metal ground layer and the second metal ground layer are in good contact, and the radiation antenna array can be ensured to have a complete radiation grounding plate.
In addition, the feed column is used for connecting the radiation antenna array and the welding part of the test joint on the second metal ground layer, so that the radiation antenna array penetrates through the dielectric substrate and the metal bottom layer to be connected with the joint.
In addition, the feeding columns are respectively connected to each antenna unit, so that the feeding columns among the antenna units can be kept independent.
In addition, because the working frequency difference of the high-frequency and low-frequency antenna units is far, the newly introduced second coupling is still in an acceptable range, and meanwhile, the good working state of the newly added low-frequency radiation antenna unit is ensured.
The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying a number of the indicated technical features. Thus, a defined feature of "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
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 (5)
1. A inter-frequency self-decoupling millimeter wave array antenna, comprising: a radiating antenna array arranged in a predetermined arrangement;
the radiating antenna array comprises at least two high-frequency radiating antenna units and at least one low-frequency radiating antenna unit;
the predetermined arrangement mode is that one low-frequency radiation antenna unit is arranged between two adjacent high-frequency radiation antenna units.
2. The inter-frequency self-decoupling millimeter wave array antenna according to claim 1, wherein the lower portion of the radiating antenna array comprises a first dielectric substrate, a first metal ground layer, a second dielectric substrate, and a second metal ground layer in sequence;
the second medium substrate is provided with a metalized through hole;
the second metal formation is used to weld a joint for connecting test equipment or a millimeter wave front.
3. The inter-frequency self-decoupling millimeter wave array antenna according to claim 2, further comprising: a feed column;
one end of the feed column is connected with the radiation antenna array, sequentially penetrates through the first dielectric substrate, the first metal stratum and the second dielectric substrate, and the other end of the feed column is connected with a welding part of an upper joint of the second metal stratum.
4. The inter-frequency self-decoupling millimeter wave array antenna according to claim 3, wherein each of the high frequency radiating antenna elements and each of the low frequency radiating antenna elements are connected to one of the feed posts.
5. The different-frequency self-decoupling millimeter wave array antenna according to any one of claims 1 to 4, wherein the original coupling of the high-frequency radiating antenna elements is a first coupling, the added low-frequency radiating antenna elements absorb part of the first coupling, and part of the first coupling is transferred to a second coupling between the high-frequency and low-frequency antenna elements, and the total coupling energy is kept basically unchanged.
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| CN202110531855.7A CN113471718A (en) | 2021-05-17 | 2021-05-17 | Different-frequency self-decoupling millimeter wave array antenna |
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| CN202110531855.7A CN113471718A (en) | 2021-05-17 | 2021-05-17 | Different-frequency self-decoupling millimeter wave array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115000710A (en) * | 2022-05-20 | 2022-09-02 | 安徽安努奇科技有限公司 | Antenna |
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| CN105474462A (en) * | 2014-06-30 | 2016-04-06 | 华为技术有限公司 | Mixed structure dual-band dual-beam three-column phased array antenna |
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Application publication date: 20211001 |