CN213242793U - Low-frequency radiating element and broadband base station antenna - Google Patents
Low-frequency radiating element and broadband base station antenna Download PDFInfo
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- CN213242793U CN213242793U CN202021414789.2U CN202021414789U CN213242793U CN 213242793 U CN213242793 U CN 213242793U CN 202021414789 U CN202021414789 U CN 202021414789U CN 213242793 U CN213242793 U CN 213242793U
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Abstract
The application relates to a low-frequency radiating unit, which comprises a chassis and at least one symmetrical oscillator, and is characterized in that the at least one symmetrical oscillator is connected to the chassis and comprises a balun and two oscillator arms, one end of the balun is connected to the chassis, the two oscillator arms are respectively and symmetrically connected to the other end of the balun, and each oscillator arm of the two oscillator arms is of a bent structure. The application also relates to a broadband base station antenna. This application can realize the miniaturized design of antenna and make the antenna independently electricity transfer in two low frequency channels.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a low frequency radiating element and a wideband base station antenna.
Background
The conventional design column spacing of the existing multi-frequency 4T4RMIMO antenna is usually about one wavelength of a low-frequency signal, so that each column of antenna can obtain good radiation performance, the antenna is oversized, a large number of iron tower resources are occupied, and meanwhile, the antenna is oversized in wind load due to large size, and the risk coefficient is increased. In addition, the conventional 4T4R dual low frequency MIMO antenna only relates to the wide frequency band 700-900MHz, but does not relate to independent adjustment of the downtilt angles of the 698-800MHz and 880-960MHz dual low frequencies, which is not favorable for network optimization of the antenna. In addition, in order to reduce the size of the antenna without affecting the radiation characteristics of the 4T4RMIMO array antenna after size reduction, it is necessary to design the radiation elements in a compact size.
SUMMERY OF THE UTILITY MODEL
In view of this, a low frequency radiating element and a wideband base station antenna are provided to achieve a miniaturized antenna design and enable the antenna to be independently electrically tuned in two dual low frequency bands.
In an embodiment of the present application, a low-frequency radiation unit is provided, including a chassis and at least one dipole, where the at least one dipole is connected to the chassis, the at least one dipole includes a balun and two dipole arms, one end of the balun is connected to the chassis, the two dipole arms are respectively and symmetrically connected to the other end of the balun, and each of the two dipole arms is of a bent structure.
In some embodiments of the application the number of dipoles is four, four of the dipoles being symmetrically arranged on the chassis.
In some embodiments of the present application, the balun includes a first balun and a second balun, one end of the first balun and one end of the second balun are connected to the chassis, and the two oscillator arms are symmetrically connected to the other end of the first balun and the other end of the second balun, respectively.
In some embodiments of the application, the low frequency radiating element further comprises at least one coaxial line, each of the at least one dipoles being connected to and feeding the low frequency radiating element through one of the at least one coaxial lines.
In some embodiments of the present application, the coaxial lines include +45 ° polarized coaxial lines and-45 ° polarized coaxial lines.
In some embodiments of the present application, each of the two vibrator arms has a rectangular parallelepiped bent structure.
The embodiment of the application also provides a broadband base station antenna, which comprises a reflecting plate, a plurality of high-frequency radiating units and a plurality of dual-frequency combiners, wherein the high-frequency radiating units are arranged on the reflecting plate to form a high-frequency radiating unit array, the broadband base station antenna also comprises a plurality of low-frequency radiating units which are arranged on the reflecting plate to form a low-frequency radiating unit array, each high-frequency radiating element in the high-frequency radiating element array is nested in the low-frequency radiating element array, each high-frequency radiation unit works in a first frequency band, each low-frequency radiation unit works in a second frequency band and a third frequency band, and each low-frequency radiation unit is connected with one of the double-frequency combiners so as to realize the electric regulation of the low-frequency radiation unit between the second frequency band and the third frequency band by multiplexing the symmetrical oscillators in the low-frequency radiation unit through the double-frequency combiners.
In some embodiments of the present application, the wideband base station antenna further includes a spacer disposed between two columns of the array of low frequency radiating elements, the spacer being configured to isolate the high frequency radiating elements from the low frequency radiating elements between the two columns of the array of low frequency radiating elements.
In some embodiments of the present application, each of the dual-band combiners is a three-port network formed by a microstrip line or a stripline structure.
In some embodiments of the present application, the distance between two columns of the low frequency radiating element array is 0.7 λ -0.9 λ, the aperture of the low frequency radiating element is 0.35 λ -0.4 λ, and the width of the reflector plate is 1.6 λ -1.7 λ, where λ is the wavelength corresponding to the center frequency of the low frequency radiating element when the center frequency is transmitted in the air.
This application sets up every oscillator arm into cuboid bending structure to increase the route of electric current on the oscillator arm through bending structure, thereby realize antenna radiating element's miniaturization. In addition, the broadband base station antenna in the application realizes the electric modulation of the low-frequency radiation unit between the second frequency band and the third frequency band by multiplexing the oscillator in the low-frequency radiation unit through the dual-frequency combiner, so that the broadband base station antenna can cover partial frequency bands of 4G and 5G before and after the target, the receiving and transmitting of signals of 698MHz-960MHz and 1710MHz-2690MHz are supported, and the problem of insufficient space resources on the sky is solved.
Drawings
Fig. 1 is an overall schematic diagram of a wideband base station antenna according to an embodiment of the present application.
Fig. 2 is a top view of a broadband base station antenna according to an embodiment of the present application.
Fig. 3 is an overall schematic diagram of an antenna radiation unit according to an embodiment of the present application.
Fig. 4 is a top view of an antenna radiation unit according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a dual-band combiner according to an embodiment of the present disclosure.
Description of the main elements
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
In order that the above objects, features and advantages of the embodiments of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the application, which are part of the disclosure and not all of the disclosure.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.
Referring to fig. 1, an overall schematic diagram of a wideband base station antenna 2 according to an embodiment of the present application is shown. The broadband base station antenna 2 includes a reflection plate 21, a plurality of high frequency radiation units 22, a plurality of low frequency radiation units 23, and a plurality of dual-band combiners 25 (please refer to fig. 5), wherein the plurality of high frequency radiation units 22 are arranged on the reflection plate to form a high frequency radiation unit array, and the plurality of low frequency radiation units 23 are arranged on the reflection plate to form a low frequency radiation unit array. Referring to fig. 2, a top view of a broadband base station antenna 2 according to an embodiment of the present invention is shown. Each high-frequency radiating element 22 in the high-frequency radiating element array is nested in the low-frequency radiating element array. Each of the high frequency radiating elements 22 operates in a first frequency band, and each of the low frequency radiating elements 23 operates in a second frequency band and a third frequency band. In this embodiment, the range of the first frequency band is 1710MHz-2690MHz, the range of the second frequency band is 698-800MHz, and the range of the third frequency band is 880MHz-960 MHz. In the present embodiment, the reflecting plate 21 is a metal reflecting plate.
In this embodiment, the wideband base station antenna 2 further includes a spacer 24. The spacer 24 is disposed between two columns of the array of low frequency radiating elements. The isolation bars 24 are used to isolate the mutual coupling of the high frequency radiating elements 22 and the low frequency radiating elements 23 between two columns of the low frequency radiating element array. In the scheme, the isolation degree of the broadband base station antenna 2 is optimized and the radiation performance of each frequency band of the broadband base station antenna 2 is improved by arranging the isolating strip 24 between two rows of the low-frequency radiation unit array. In the present embodiment, the high-frequency radiating elements 22 are arranged in two rows on the reflector to form a high-frequency radiating element array. A plurality of the low frequency radiating elements 23 are arranged on the reflecting plate to form two rows of low frequency radiating element arrays. The two rows of high-frequency radiating element arrays are nested in the two rows of low-frequency radiating element arrays. In the present embodiment, the number of the low-frequency radiation units 23 is smaller than the number of the high-frequency radiation units 22. Each high frequency radiating element 22 of the array of high frequency radiating elements is nested within the low frequency radiating element 23 or between two low frequency radiating elements 23.
Referring to fig. 3, an overall schematic diagram of the low-frequency radiation unit 23 in an embodiment of the present application is shown. The low frequency radiating element 23 includes a chassis 231 and at least one dipole 232. The at least one dipole 232 is attached to the chassis 231. In the present embodiment, the number of the dipoles 232 is four, and four dipoles 232 are symmetrically disposed on the chassis 11.
In this embodiment, each dipole 232 includes a balun 2321 and two dipole arms 2322. One end of the balun 2321 is connected to the chassis 231, and the two oscillator arms 2322 are respectively and symmetrically connected to the other end of the balun 2321. Specifically, the balun 2321 includes a first balun 23211 and a second balun 23212, one end of the first balun 23211 and one end of the second balun 23212 are connected to the chassis 231, and the two oscillator arms 2322 are respectively and symmetrically connected to the other end of the first balun 23211 and the other end of the second balun 23212. In the present embodiment, each of the two oscillator arms 2322 has a bent structure. For example, each of the two oscillator arms 2322 has a rectangular parallelepiped bending structure. In the scheme, each vibrator arm 2322 is arranged to be of a rectangular parallelepiped bending structure, and the bending structure is used for increasing the current path on the vibrator arm 2322, so that the miniaturization of the low-frequency radiation unit 23 is realized.
Referring to fig. 4, a top view of the low frequency radiation unit 23 in an embodiment of the present application is shown. The low frequency radiating element 23 further comprises at least one coaxial line 233, each dipole 232 of the at least one dipole 232 being fed through one coaxial line 233 of the at least one coaxial line 233 for realizing an electrical connection of the dipoles 232. In this embodiment, a coaxial line 233 is connected to the balun 2321 of each dipole 232. In the present embodiment, the number of the coaxial lines 233 is four. In this embodiment, the coaxial lines 233 include +45 ° polarized coaxial lines and-45 ° polarized coaxial lines. In this embodiment, the +45 ° polarized coaxial line or the-45 ° polarized coaxial line may be selectively connected according to the arrangement manner of the dipole 232 on the chassis 231.
In this embodiment, each low-frequency radiating unit 23 is connected to one dual-frequency combiner 25 of the multiple dual-frequency combiners 25, so as to multiplex the oscillators in the low-frequency radiating unit 23 through the dual-frequency combiner 25, thereby implementing the electrical tuning of the low-frequency radiating unit 23 between the second frequency band and the third frequency band. In the present embodiment, each dual-band combiner 25 is a three-port network formed by a microstrip line or a stripline structure. Specifically, please refer to fig. 5, which shows a schematic diagram of the dual-band combiner 25 according to an embodiment of the present application. Each dual-frequency combiner 25 includes an input port 251 and two output ports 252. The input port 251 of each dual-frequency combiner 25 is connected to the oscillator arm 2322 of the low-frequency radiating unit 23, and the two output ports 252 of each dual-frequency combiner 25 respectively output the signal of the second frequency band and the signal of the third frequency band.
The broadband base station antenna 2 in the scheme multiplexes the oscillators in the low-frequency radiation unit 23 through the dual-frequency combiner 25 to realize the electric modulation of the low-frequency radiation unit 23 between the second frequency band and the third frequency band, so that the broadband base station antenna 2 can cover partial frequency bands of 4G and 5G before and after the target, the receiving and transmitting of signals of 698MHz-960MHz and 1710MHz-2690MHz are supported, and the problem of insufficient space resources on the sky is solved.
In this embodiment, the distance between two rows of the low-frequency radiating element array is 0.7 λ -0.9 λ, the aperture (radius) of the low-frequency radiating element is 0.35 λ -0.4 λ, and the width of the reflector 21 is 1.6 λ -1.7 λ, where λ is the wavelength corresponding to the center frequency of the low-frequency radiating element when the low-frequency radiating element is transmitted in the air. In this embodiment, the center frequency of the low-frequency radiating unit refers to the center frequency in the second frequency band. In the scheme, the distance between two rows of the low-frequency radiating element array is set to be 0.7 lambda-0.9 lambda, the caliber of the low-frequency radiating element is set to be 0.35 lambda-0.4 lambda, the width of the reflecting plate 21 can be controlled to be 1.6 lambda-1.7 lambda, and the miniaturization of the whole structure of the broadband base station antenna 2 and smaller wind load are realized under the condition that mutual coupling of the two rows of radiating elements is not increased.
Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the embodiments of the present application.
Claims (9)
1. A low-frequency radiating unit comprises a chassis and at least one dipole, and is characterized in that the at least one dipole is connected to the chassis and comprises a balun and two dipole arms, one end of the balun is connected to the chassis, the two dipole arms are respectively and symmetrically connected to the other end of the balun, each dipole arm of the two dipole arms is of a bent structure, the low-frequency radiating unit further comprises at least one coaxial line, and each dipole of the at least one dipole is connected with one coaxial line of the at least one coaxial line and feeds the low-frequency radiating unit through the coaxial line of the at least one coaxial line.
2. The low frequency radiating element according to claim 1, wherein the number of dipoles is four, and four dipoles are symmetrically arranged on the chassis.
3. The low-frequency radiating element according to claim 1, wherein the balun includes a first balun and a second balun, one end of the first balun and one end of the second balun are connected to the chassis, and the two dipole arms are symmetrically connected to the other end of the first balun and the other end of the second balun, respectively.
4. The low frequency radiating element of claim 1, wherein the coaxial lines comprise +45 ° polarized coaxial lines and-45 ° polarized coaxial lines.
5. The low frequency radiating element of claim 1, wherein each of the two dipole arms is a rectangular parallelepiped folded structure.
6. A broadband base station antenna comprises a reflection plate, a plurality of high-frequency radiation units and a plurality of dual-frequency combiners, wherein the high-frequency radiation units are arranged on the reflection plate to form a high-frequency radiation unit array, the broadband base station antenna is characterized by further comprising a plurality of low-frequency radiating elements according to any one of claims 1 to 5, wherein the plurality of low-frequency radiating elements are arranged on the reflecting plate to form a low-frequency radiating element array, each high-frequency radiating element in the high-frequency radiating element array is nested in the low-frequency radiating element array, each high-frequency radiation unit works in a first frequency band, each low-frequency radiation unit works in a second frequency band and a third frequency band, and each low-frequency radiation unit is connected with one of the double-frequency combiners so as to realize the electric regulation of the low-frequency radiation unit between the second frequency band and the third frequency band by multiplexing the symmetrical oscillators in the low-frequency radiation unit through the double-frequency combiners.
7. The broadband base station antenna of claim 6 further comprising a spacer disposed between two columns of the array of low frequency radiating elements, the spacer for isolating the high frequency radiating elements from the low frequency radiating elements between the two columns of the array of low frequency radiating elements.
8. The broadband base station antenna of claim 6, wherein each of the dual-band combiners is a three-port network formed by microstrip line or stripline structure.
9. The broadband base station antenna of claim 6, wherein the distance between two rows of the low frequency radiating element array is 0.7 λ -0.9 λ, the aperture of the low frequency radiating element is 0.35 λ -0.4 λ, and the width of the reflector is 1.6 λ -1.7 λ, where λ is the wavelength corresponding to the center frequency of the low frequency radiating element when the low frequency radiating element is transmitting in air.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021414789.2U CN213242793U (en) | 2020-07-17 | 2020-07-17 | Low-frequency radiating element and broadband base station antenna |
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| CN202021414789.2U CN213242793U (en) | 2020-07-17 | 2020-07-17 | Low-frequency radiating element and broadband base station antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117293561A (en) * | 2023-09-07 | 2023-12-26 | 人天通信集团有限公司 | Dual polarized antenna radiating element and base station antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117293561A (en) * | 2023-09-07 | 2023-12-26 | 人天通信集团有限公司 | Dual polarized antenna radiating element and base station antenna |
| CN117293561B (en) * | 2023-09-07 | 2024-05-24 | 人天通信集团有限公司 | Dual polarized antenna radiating element and base station antenna |
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