CN114465023A - Method for eliminating balun influence by fusing layout base station antenna - Google Patents
Method for eliminating balun influence by fusing layout base station antenna Download PDFInfo
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- CN114465023A CN114465023A CN202210134315.XA CN202210134315A CN114465023A CN 114465023 A CN114465023 A CN 114465023A CN 202210134315 A CN202210134315 A CN 202210134315A CN 114465023 A CN114465023 A CN 114465023A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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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
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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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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Abstract
The invention belongs to the technical field of wireless communication base station antenna development and design, and particularly relates to a method for eliminating balun influence by fusing layout base station antennas, which comprises the following steps: 1) when the array has a high-frequency and low-frequency nested layout and the high-frequency unit has obvious directional diagram distortion, checking (or testing) the current density on the low-frequency feed balun of the low-frequency unit by using high-frequency electromagnetic simulation software, and judging whether a coupling resonant current exists; 2) if stronger coupling current exists, the resonant frequency generated by the coupling of the high-frequency unit on the low-frequency feed balun is removed to the outside of the frequency band of high-frequency work, the problem of mutual influence among the antennas of the fusion layout base station is effectively solved, the operation is relatively easy, the cost caused by the method is lower, the application range is wide, and the practicability is high.
Description
Technical Field
The invention belongs to the technical field of mobile communication antennas, and particularly relates to a method for eliminating balun influence by a base station antenna with a fusion layout.
Background
With the rapid development of mobile communication, from traditional 2G, 3G, 4G to current 5G, the service forms are more and more abundant, and at the same time, the number of antenna channels is more and more, and the working frequency bands of the antenna are more and more, from the previous 900MHz, 1710-2170MHz, to the current 690-960/1710-2690MHz and 3400-3800MHz frequency bands, the number of channels is also from the previous 2 channels, 4 channels, 6 channels, 8 channels to the current 4+6/4+8/4+6+8/4+8+8 and so on, the antenna form is also changed into the form of multi-band and multi-channel mixed layout, and the problems of different-frequency mutual coupling, same-frequency mutual coupling and so on of the new antenna form are more and more;
in view of this, the base station antenna will also face a great challenge, and it is urgent to solve the mutual influence between the antennas.
Disclosure of Invention
Aiming at the defects of the prior art, the invention designs a method for eliminating the influence of the balun by the base station antenna with the fusion layout in a mode that high-frequency electromagnetic simulation software is adopted to check the current density on the low-frequency feed balun of the low-frequency unit and remove the resonant frequency on the low-frequency feed balun out of the high-frequency working frequency band, thereby solving the problem of mutual influence among the base station antennas with the fusion layout.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for eliminating balun influence by fusing layout base station antennas comprises the following steps:
1) when high-frequency and low-frequency nested layout exists in the array and the high-frequency unit has obvious directional diagram distortion, checking the current density on the low-frequency feed balun of the low-frequency unit by using high-frequency electromagnetic simulation software, and judging whether coupling resonant current exists or not;
2) the resonant frequency on the low frequency feed balun, which is generated by the high frequency element coupling, is removed outside the frequency band of high frequency operation if a strong coupling current is present.
Preferably, the high-frequency operating bandwidth is set as follows: f 1-f 2; the resonant frequency is: f3, the step 2 includes the following steps except the frequency band of the high-frequency operation: f3> f2 or f3< f 1.
Preferably, the path length of the current in the low frequency feed balun is increased or decreased.
Preferably, the way of increasing the path length of the current in the low-frequency feed balun is as follows: a serpentine current path is provided within a low frequency feed balun of a low frequency element.
Preferably, the way of increasing the path length of the current in the low-frequency feed balun is as follows: and a gap is formed in a conductor in the low-frequency feed balun of the low-frequency unit of the fusion array.
Preferably, the specific way of increasing the path length of the current in the low-frequency feed balun is as follows: the length of the conductors within the low frequency feed balun of the fused array is increased.
Preferably, the path length of the current in the low frequency feed balun is reduced by reducing the length of the conductor in the low frequency feed balun of the fused array.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, a mode that high-frequency electromagnetic simulation software is adopted to check the current density on the low-frequency feed balun of the low-frequency unit and remove the resonant frequency on the low-frequency feed balun out of the high-frequency working frequency band is adopted, and the method for eliminating the balun influence of the base station antenna with the fusion layout is designed, so that the problem of mutual influence among the base station antennas with the fusion layout is solved.
2. The physical length of the feed balun of the low-frequency unit of the fusion array is increased in a mode that the current runs in a snake-shaped line, so that the high-frequency unit is coupled to the resonant current frequency f3< f1 on the low-frequency unit balun when the high-frequency unit works, the problem of mutual influence during hybrid layout of the fusion antenna is solved, the method is relatively easy to implement, and therefore the method is low in cost, wide in application range and high in practicability.
3. According to the invention, the current path length of the low-frequency unit is increased by opening a plurality of gaps on the feed balun of the low-frequency unit of the fusion array, so that the physical length of the low-frequency unit is equivalently changed, and the high-frequency unit is coupled to the resonant current frequency f3< f1 on the low-frequency unit balun when the high-frequency unit works.
Drawings
FIG. 1 is a top view of a hybrid layout array of a converged layout base station antenna according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic diagram of an embodiment of a serpentine disposed in a low frequency feed balun;
fig. 4 is a schematic structural diagram of a slot provided on the low-frequency feed balun;
FIG. 5 is a schematic diagram of a structure for increasing the length of the low frequency feed balun inner conductor;
fig. 6 is a schematic diagram of a structure for reducing the length of the low-frequency feed balun inner conductor.
Wherein, 1, low-frequency feed balun; 2. a serpentine; 3. a conductor; 4. a gap.
Detailed Description
Referring to fig. 1-6, a method for eliminating balun influence by a base station antenna with a fusion layout includes the following steps:
1) when the array has a high-frequency and low-frequency nested layout and the high-frequency unit has obvious directional diagram distortion, checking (or testing) the current density on the low-frequency feed balun of the low-frequency unit by using high-frequency electromagnetic simulation software, and judging whether a coupling resonant current exists;
2) if there is a strong coupling current, the resonance frequency on the low frequency feed balun, which is generated by the high frequency element coupling, is removed outside the frequency band of high frequency operation.
In this embodiment, in the current coupling antenna layout, when the coupling influence is mainly a high-frequency and low-frequency layout, the influence of the low-frequency unit on the high-frequency unit is the most serious, and the coupling influence mainly comes from two aspects: influence of the radiating surface, coupling influence of the balun; the influence of the balun is mainly generated by resonance, when the resonance occurs, the high-frequency unit can generate strong coupling current on the balun of the low-frequency unit, so that the distortion or gain loss occurs in the working direction of the high-frequency unit, therefore, high-frequency electromagnetic simulation software is used for checking the current density on the low-frequency feed balun of the low-frequency unit, judging whether the coupling resonance current exists, and if the strong coupling current exists, removing the resonance frequency on the low-frequency feed balun out of the high-frequency working frequency band, so that the distortion or gain loss does not occur in the working direction of the high-frequency unit.
As a preferred mode, the high-frequency operating bandwidth is set as follows: f 1-f 2; the resonant frequency is: f3, the step 2 includes the following steps except the frequency band of the high-frequency operation: f3> f2 or f3< f1, so that f3 is not in the interval formed by f 1-f 2, and the balun of the high-frequency unit does not influence the balun of the low-frequency unit.
Preferably, the path length of the current in the low frequency feed balun 1 is increased or decreased, so that the resonance point on the low frequency feed balun 1 caused by the coupling of the high frequency element is removed to the outside of the operating band of the high frequency element.
As a preferable mode, as shown in fig. 3, the path length of the current in the low-frequency feed balun 1 is increased by: the current path of the serpentine 2 is arranged in the low frequency feed balun 1 of the low frequency element so that the high frequency element is operatively coupled to the low frequency element balun at a resonant current frequency f3< f 1.
As a preferable mode, as shown in fig. 4, the path length of the current in the low-frequency feed balun is increased by: a gap 4 is formed in a conductor 3 in a low-frequency feed balun 1 of a low-frequency unit of the fusion array, so that the physical length of the conductor 3 in the low-frequency feed balun 1 is equivalently changed, and the high-frequency unit is coupled to a resonant current frequency f3< f1 on the low-frequency unit balun when in work.
As a preferable mode, as shown in fig. 5, a specific mode of increasing the path length of the current in the low-frequency feed balun 1 is as follows: increasing the length of the conductor 3 in the low frequency feed balun 1 of the fused array to meet the resonant frequency f3, f3> f2 can eliminate the distortion or gain loss of the high frequency element radiation pattern caused by the low frequency feed balun 1 coupling resonance.
As a preferable mode, as shown in fig. 6, a specific way to reduce the path length of the current in the low-frequency feed balun 1 is to reduce the length of the conductor 3 in the low-frequency feed balun 1 of the fused array, so as to satisfy the resonant frequency f3, where f3< f1, so as to eliminate the distortion or gain loss of the high-frequency unit radiation pattern caused by the coupling resonance of the low-frequency feed balun 1.
Claims (7)
1. A method for eliminating balun influence by fusing layout base station antennas is characterized by comprising the following steps:
1) when high-frequency and low-frequency nested layout exists in the array and the high-frequency unit has obvious directional diagram distortion, high-frequency electromagnetic simulation software is used for checking the current density on the low-frequency feed balun (1) of the low-frequency unit and judging whether coupling resonant current exists or not;
2) if there is a strong coupling current, the resonance frequency on the low frequency feed balun (1) resulting from the high frequency element coupling is removed outside the frequency band of high frequency operation.
2. The method for eliminating balun influence by fusing layout base station antennas according to claim 1, wherein the high frequency operating bandwidth is set as follows: f 1-f 2; the resonant frequency is: f3, the step 2 includes the following steps except the frequency band of the high-frequency operation: f3> f2 or f3< f 1.
3. A method for eliminating balun influence by a converged layout base station antenna according to claim 2, wherein the path length of the current in the low frequency feed balun (1) is increased or decreased.
4. A method for eliminating balun influence by a fused topology base station antenna according to claim 3, characterized in that the way of increasing the path length of the current in the low frequency feed balun (1) is: a current path of a serpentine (2) is arranged in a low-frequency feed balun (1) of a low-frequency unit.
5. The method for eliminating balun influence by the fused layout base station antenna according to claim 3, wherein the way of increasing the path length of the current in the low frequency feed balun is as follows: a gap (4) is arranged on a conductor (3) in a low-frequency feed balun (1) of a low-frequency unit of the fusion array.
6. The method for eliminating balun influence by using the fused layout base station antenna as claimed in claim 3, wherein the specific way of increasing the path length of the current in the low frequency feed balun (1) is as follows: the length of the conductor (3) within the low frequency feed balun (1) of the fused array is increased.
7. A method of canceling balun effect for a fused topology base station antenna according to claim 3, characterized in that the path length of the current in the low frequency feed balun (1) is reduced by reducing the length of the conductor (3) in the low frequency feed balun (1) of the fused array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134315.XA CN114465023A (en) | 2022-02-14 | 2022-02-14 | Method for eliminating balun influence by fusing layout base station antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210134315.XA CN114465023A (en) | 2022-02-14 | 2022-02-14 | Method for eliminating balun influence by fusing layout base station antenna |
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| CN114465023A true CN114465023A (en) | 2022-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090237314A1 (en) * | 2008-03-21 | 2009-09-24 | Farzin Lalezari | Broadband antenna system allowing multiple stacked collinear devices |
| WO2018018966A1 (en) * | 2016-07-27 | 2018-02-01 | 京信通信技术(广州)有限公司 | Antenna radiation unit and multi-band base station antenna |
| CN111864367A (en) * | 2020-07-27 | 2020-10-30 | 摩比天线技术（深圳）有限公司 | Low-frequency radiation unit and base station antenna |
| CN112599974A (en) * | 2021-03-02 | 2021-04-02 | 摩比科技（深圳）有限公司 | Low-frequency radiation unit and separable multi-frequency base station antenna |
| CN113922049A (en) * | 2021-10-18 | 2022-01-11 | 华南理工大学 | Dual-frequency dual-polarization common-caliber base station antenna and communication equipment |
-
2022
- 2022-02-14 CN CN202210134315.XA patent/CN114465023A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090237314A1 (en) * | 2008-03-21 | 2009-09-24 | Farzin Lalezari | Broadband antenna system allowing multiple stacked collinear devices |
| WO2018018966A1 (en) * | 2016-07-27 | 2018-02-01 | 京信通信技术(广州)有限公司 | Antenna radiation unit and multi-band base station antenna |
| CN111864367A (en) * | 2020-07-27 | 2020-10-30 | 摩比天线技术（深圳）有限公司 | Low-frequency radiation unit and base station antenna |
| CN112599974A (en) * | 2021-03-02 | 2021-04-02 | 摩比科技（深圳）有限公司 | Low-frequency radiation unit and separable multi-frequency base station antenna |
| CN113922049A (en) * | 2021-10-18 | 2022-01-11 | 华南理工大学 | Dual-frequency dual-polarization common-caliber base station antenna and communication equipment |
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Application publication date: 20220510 |