CN113555677B - Feed system, antenna system and base station - Google Patents
Feed system, antenna system and base station Download PDFInfo
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- CN113555677B CN113555677B CN202110653671.8A CN202110653671A CN113555677B CN 113555677 B CN113555677 B CN 113555677B CN 202110653671 A CN202110653671 A CN 202110653671A CN 113555677 B CN113555677 B CN 113555677B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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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
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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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
Abstract
The application provides a feed system, antenna system and base station, this feed system includes first stripline and the signal transmission layer of range upon range of, wherein, first stripline includes: at least one first cavity, and a first strip line inner conductor arranged in each cavity, wherein the first strip line inner conductor is used for being electrically connected with a feeder line inner core connected with a radiation unit in an antenna system; the top side wall of each cavity is a reflecting surface stratum capable of reflecting radiation waves, and the reflecting surface stratum is used for being electrically connected with the feed outer conductor of the radiation unit; the signal transmission layer includes: a second cavity stacked corresponding to each first cavity; and a signal transmission line disposed within each second cavity, wherein each signal transmission line is electrically connected to the corresponding first stripline inner conductor of the signal transmission line. In the technical scheme, the loss of a feed system is reduced by adopting the first strip line and the signal transmission layer, and meanwhile, the installation of the multi-frequency antenna is facilitated.
Description
The present application is a division of chinese patent application filed in 2017, 11/28/h, with the application number 201711216271.0 and the application name "a feed system, an antenna system and a base station", and the entire contents of the present application are included in the parent application.
Technical Field
The present application relates to the field of communications technologies, and in particular, to a feed system, an antenna system, and a base station.
Background
The multi-frequency multi-polarization antenna is a development trend of a base station antenna, and along with the development of multi-frequency multi-system of a mobile communication system, the corresponding base station antenna needs to perform corresponding multi-frequency multi-polarization so as to meet the common requirements of each operator or a plurality of operators. When the multi-frequency antenna is designed, because of a plurality of frequency bands, the connection of a feed network is very complicated, and the batch stable production is difficult to realize in a conventional component and cable mode; meanwhile, the loss of the antenna is more and more important, so that the loss is improved very important while the multi-frequency antenna is simplified; however, the multi-frequency antenna in the prior art is difficult to assemble, poor in consistency and large in feed loss.
Disclosure of Invention
The application provides a feed system, an antenna system and a base station, which are used for reducing the feed loss of an antenna.
A first aspect provides a feeding system including a first strip line and a signal transmission layer that are laminated, wherein,
the first strip line includes: the antenna system comprises at least one first cavity and a plurality of first strip-line inner conductors which are arranged in each first cavity and arranged along the length direction of the first cavity, wherein each first strip-line inner conductor is used for being electrically connected with a feed line inner core connected with at least one radiating unit in the antenna system; the top side wall of each first cavity is a reflecting surface ground layer capable of reflecting radiation waves, and the reflecting surface ground layer is used for being electrically connected with the feed outer conductor of the radiation unit;
the signal transmission layer includes: a second cavity stacked corresponding to each first cavity; and the signal transmission line is arranged in each second cavity, and is electrically connected with the plurality of first strip line inner conductors for the corresponding first cavity and the corresponding second cavity.
In the technical scheme, the loss of a feed system is reduced by adopting the first strip line and the signal transmission layer, and meanwhile, the installation of the multi-frequency antenna is facilitated.
In a specific embodiment, the signal transmission layer is a strip line, the signal transmission lines are strip line inner conductors, and each strip line inner conductor is provided with a medium capable of sliding relative to the strip line inner conductor. This change in phase value can change the maximum pointing direction of the array antenna from the perspective of polarizing the entire path, thereby achieving a change in the downtilt angle of the array antenna.
In a specific embodiment, the signal transmission line is a coaxial line. The feed loss can be effectively reduced.
In a specific embodiment, the width direction of the stripline inner conductor is perpendicular to the width direction of the first stripline inner conductor, and the stripline inner conductor passes through the sidewall between the first cavity and the second cavity and is electrically connected with the first stripline inner conductor corresponding to the stripline inner conductor. The connection mode is simplified.
In a specific embodiment, the antenna further comprises a printed circuit substrate arranged on the reflecting surface ground layer, the outer conductor of the power supply line in the antenna system is electrically connected with the reflecting surface ground layer through a first circuit on the printed circuit substrate, and the inner core of the power supply line is electrically connected with the first strip line inner conductor through a second circuit on the printed circuit substrate. The connection is convenient.
In a specific embodiment, at least one of the first cavities and at least one of the second cavities share a metal sidewall therebetween. Thereby simplifying the structure of the entire apparatus.
In a specific embodiment, each of the first cavities corresponds to at least two of the second cavities, and the first stripline inner conductor in each of the first cavities is electrically connected to the signal transmission line in at least two of the second cavities corresponding to the first cavity.
In a specific embodiment, each signal transmission line is electrically connected with the corresponding first strip line inner conductor of the signal transmission line through a pin, and a through hole matched with the pin is arranged on the metal side wall.
In a specific embodiment, the first cavity and the second cavity are cavity structures with two open ends.
In a specific embodiment, the reflector layer is made of a metal material that reflects the radiant wave.
In a specific embodiment, a surface of the reflector layer facing the radiation unit is a plane or an evaginated arc surface.
The present application further provides an antenna system, which includes at least one antenna element, and a feeding system for feeding the at least one antenna element, where the feeding system is the feeding system described in any of the above embodiments.
In the technical scheme, the loss of a feed system is reduced by adopting the first strip line and the signal transmission line, and meanwhile, the installation of the multi-frequency antenna is facilitated.
In a specific embodiment, each of the antenna elements is a dual-polarized antenna element.
In a specific embodiment, each antenna element includes two radiation elements, and the two radiation elements are nested, and the feeding system feeds the two radiation elements respectively.
In a specific embodiment, the antenna units are arranged in a plurality of single rows.
The application also provides a base station comprising the antenna system of any of the above embodiments.
In the technical scheme, the loss of a feed system is reduced by adopting the first strip line and the signal transmission line, and meanwhile, the installation of the multi-frequency antenna is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a feeding system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of a feeding system in an antenna system according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 6 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 7 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of another feeding system provided in the embodiment of the present application;
fig. 9 is a schematic structural diagram of another feeding system provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
Plural in this application means two or more.
The feeder system provided by the embodiment of the application is a feed system corresponding to an array antenna, and the array antenna is preferably introduced, wherein the array antenna is an antenna system which works through a common feed network and is formed by arranging a plurality of identical single antennas according to a certain geometric rule. The feeding system provided by the embodiment of the application is used for simplifying the feeding structure of the array antenna and reducing the loss of the antenna during feeding.
As shown in fig. 1 and 3, fig. 1 and 3 show the feeding system structure of different embodiments.
The feeding system provided by the embodiment of the application comprises two parts: the first strip line 10 and the signal transmission layer 20 are disposed in a stacked manner, and in the specific arrangement, as shown in fig. 1, the first strip line 10 and the signal transmission layer 20 are disposed in a stacked manner along the height direction, and the first strip line 10 is located above and the signal transmission layer 20 is located below. The following description will be made for each of the two configurations.
First, for a first strip line 10, it comprises: at least one first cavity 12, and a plurality of first strip line inner conductors 11 disposed in each first cavity 12 and arranged along the length direction of the first cavity 12, wherein the top side wall of each first cavity 12 is a reflective surface ground 14 capable of reflecting radiation waves, and each first strip line inner conductor 11 is used for electrically connecting with a feed line inner core of at least one radiation unit in the antenna system; the first strip line inner conductor 11 in each cavity is used for electrically connecting with a feeder core connected with a radiation unit in the antenna system;
for the signal transmission layer 20, it includes a second cavity 22 stacked corresponding to each first cavity 12; and a signal transmission line is provided in each second cavity 22, and when connected, each signal transmission line is electrically connected to the corresponding first strip line inner conductor 11 of the signal transmission line for the corresponding first cavity 12 and second cavity 22. The signal transmission layer 20 may be formed in different structures, as shown in fig. 1, the signal transmission layer 20 is a strip line, and the signal transmission line is a strip line inner conductor, or as shown in fig. 3, the signal transmission line in the signal transmission layer 20 is a coaxial line 21a.
In order to facilitate understanding of the relationship between the first strip line 10 and the signal transmission layer 20 provided in the embodiments of the present application, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
Example 1
With continuing reference to fig. 1, fig. 1 shows a structure of a feeding system according to an embodiment of the present application, the feeding system is used for feeding an array antenna, and the feeding system includes two stacked structures, a first strip line 10 and a signal transmission layer 20, where, in this embodiment, the signal transmission layer 20 adopts a strip line structure, and in this case, the signal transmission line is a strip line inner conductor, and in order to distinguish the first strip line 10, the signal transmission layer 20 is named as a second strip line, and the signal transmission line is a second strip line inner conductor 21b.
With continued reference to fig. 1, fig. 1 shows the application of the feeding system in an array antenna, and it can be seen from fig. 1 that there are four layers along the signal radiation direction (generally, the radiation surface of the radiation element faces the signal radiation direction), which are: a second strip line, the first strip line 10, a reflector layer 14 and a radiating element; the first cavity 12 of the first strip line 10 and the second cavity 22 of the second strip line are of a cavity structure with openings at two ends, a pin 13 is inserted between the two cavities, the pin 13 is used for connecting the first strip line inner conductor 11 and the second strip line inner conductor 21b, for each first cavity 12, the number of the first strip line inner conductors 11 in the first cavity 12 is multiple, the multiple first strip line inner conductors 11 are arranged along the length direction of the first cavity 12, and when the first cavity is connected with the second strip line inner conductor 21b, each first strip line inner conductor 11 is connected with the second strip line inner conductor 21b through the pin 13. In addition, the first strip line inner conductor 11 in the first cavity 12 is connected with the radiation unit by the feeder core of the radiation unit. In a specific arrangement, each first stripline inner conductor 11 is connected to a plurality of feeder cores so that the first stripline inner conductor 11 can transmit signals to at least one antenna element.
With continued reference to fig. 1, in the present embodiment, the reflector layer 14 is a top side wall of the first cavity 12, the top side wall is a layer capable of reflecting the radiation wave, and in the specific manufacturing process, the reflector layer 14 is a reflector layer made of a metal material capable of reflecting the radiation wave, such as copper, aluminum, and the like. In addition, the reflector layer 14 may have different shapes to improve the reflection effect, for example, the surface of the reflector layer 14 facing the radiation unit may be a plane or an outer convex arc surface. More specifically, in the structure shown in fig. 1, two bent structures are respectively disposed at two side edges of the reflector layer 14, so as to improve the reflection effect.
In the embodiment, the first cavities 12 and the second cavities 22 are stacked, and in order to simplify the structure, at least one of the first cavities 12 and at least one of the second cavities 22 share a metal sidewall. That is, as shown in fig. 1, there is only one metal sidewall between the first cavity 12 and the corresponding second cavity 22, so that the structures forming the first cavity 12 and the second cavity 22 may be an integral structure. With continued reference to fig. 1, when the pin 13 connects the first stripline inner conductor 11 and the second stripline inner conductor 21b, the pin 13 passes through a common ground (a metal sidewall between the first cavity 12 and the second cavity 22) of the first cavity 12 and the second cavity 22, and an opening is formed in the common ground to avoid the common ground; the pin 13 passes through the opening, and both ends are connected to the first strip line inner conductor 11 and the second strip line inner conductor 21b, respectively. When the feed line core of the radiation unit passes through the reflecting surface ground layer 14, the reflecting surface ground layer 14 is also provided with an avoidance hole for the feed line core to pass through, and the radiation unit is connected with the first strip line inner conductor 11. The pin 13 and the feeder core thus connect the circuit in the first cavity 12 (the circuit containing the first stripline inner conductor 11), the circuit in the second cavity 22 (the circuit containing the second stripline inner conductor 21) and the radiating element.
With continued reference to fig. 1, in this embodiment, the circuit in the first cavity 12 may have a power dividing circuit, and when configured, the first stripline inner conductor 11 is connected to the power dividing circuit, so that a signal input by the first stripline inner conductor 11 may be transmitted to each antenna unit 40 connected thereto.
In addition, when the radiation unit is electrically connected to the reflector layer 14, the radiation unit may be in direct contact connection or in coupling connection, and the specific connection may be selected according to the actual situation.
As a specific embodiment, as shown in fig. 2, in the present example, a medium 23 slidable relative to the second stripline inner conductors 21b is provided on each of the second stripline inner conductors 21b. As a general knowledge, the medium composed of the second strip line inner conductor 21b and the medium 23 at least includes three parts, the middle part is a relatively high dielectric constant medium part (the second strip line inner conductor 21 b), and two sides respectively have a relatively low dielectric constant part, and the low part can serve the purposes of matching signal transmission and reducing reflection. This medium 23 slides along the direction in which the second stripline inner conductor 21b extends lengthwise, and can change the phase values reaching P1 and P2 from the input signal of Pin; this change in phase value can change the maximum pointing direction of the array antenna from the perspective of polarizing the entire path, thereby achieving a change in the downtilt angle of the array antenna.
Example 2
As shown in fig. 3 and fig. 4, fig. 3 shows a schematic structural diagram of a power feeding system provided in an embodiment of the present application. Fig. 4 shows a schematic view of an assembly of an array antenna with a feeding system. In this embodiment, a single radiation element of the antenna unit 40 employs dual-polarized radiation elements, and the antenna units 40 are arranged in a linear array on the array; the first cavity 12 of the first strip line 10 and the second cavity 22 of the signal transmission layer 20 and the reflector layer 14 in the feed system are integrally machined and molded by section bars; when the feed system is connected to the antenna element 40, the dual-polarized radiating element is mounted above the reflector ground 14. Because the dual-polarized radiation oscillator correspondingly needs two feeder lines for feeding, the number of the corresponding first cavities 12 is two, the number of the second cavities 22 is two, each second cavity 22 comprises three communicated small cavities, coaxial lines 21a are arranged in the two small cavities, a metal ring is arranged in the other small cavity, the metal ring is connected with the inner cores of the two coaxial lines 21a, and phase-shifting media for changing phases are arranged around the metal ring. When the first strip line 10 is connected to the signal transmission layer 20, the first strip line inner conductor 11 is a printed circuit board circuit, and the first strip line inner conductor 11 is connected to the inner conductors of the two coaxial lines 21a through the pin 13.
As can be seen from the above description, the signal transmission layer 20 provided in this embodiment uses the coaxial line 21a to transmit signals, and the coaxial line 21a connects the metal ring and the phase shift medium, so that the phase values reaching P1 and P2 from the input signal of Pin can be changed; this change in phase value can change the maximum pointing direction of the array antenna from the perspective of polarizing the entire path, thereby achieving a change in the downtilt angle of the array antenna.
With continued reference to fig. 3 and 4, for better simplicity of assembly, in this embodiment, the connection between the pin 13 and the cavity is in the form of soldering, the connection between the feeder core and the first cavity 12 is in the form of soldering, and the connection between the feeder core and the radiating element is in a coupling electrical connection or a direct connection.
When adopting above-mentioned structure, can find out whole feed system's simple structure, the operation aspect can promote the assembly efficiency of product by a wide margin. And the integrated feed network can be realized under the small-size width; and because the second cavity 22 uses the coaxial line 21a and the first cavity 12 uses the strip line, the loss of the whole network is very low, and the whole network is a transmission line with very low loss.
Example 3
As shown in fig. 5, the present embodiment is a modification of the feeding system shown in fig. 2. In the embodiment shown in fig. 5, the signal transmission layer 20 has a strip line structure, that is, the signal transmission layer 20 is a second strip line, and the signal transmission line is a second strip line inner conductor 21b.
In order to simplify the structure of the feeding system, in the embodiment, the arrangement of the second strip line is changed, and as shown in fig. 5, the second strip line is arranged in a perpendicular manner to the first strip line 10. In this manner, the width direction of the second cavity 22 is set perpendicular to the width direction of the first cavity 12, and the width direction of the second stripline inner conductor 21b is perpendicular to the width direction of the first stripline inner conductor 11. When this structure is employed, the second stripline inner conductor 21b may be extended such that the second stripline inner conductor 21b passes through the metal sidewall between the first cavity 12 and the second cavity 22 and is electrically connected to the first stripline inner conductor 11 corresponding to the second stripline inner conductor 21b. Thus, the first strip line inner conductor 11 and the second strip line inner conductor 21b do not need to be connected through the pin 13, and the second strip line inner conductor 21b replaces the pin 13, so that the design is simplified.
In addition, a slidable medium 23 is disposed in the second cavity 22 of the second strip line, this medium 23 slides along the length extending direction of the second cavity 22, and the medium 23 can change the phase value reaching P1 and P2 from the input signal of Pin; this change in phase value can change the maximum pointing direction of the array antenna from the perspective of polarizing the entire path, thereby achieving a change in the downtilt angle of the array antenna.
Example 4
In this embodiment, each first cavity 12 corresponds to at least two second cavities 22, and each first stripline inner conductor 11 in each first cavity 12 is electrically connected to a signal transmission line in at least two second cavities 22 corresponding to the first cavity 12, respectively. As shown in fig. 6, fig. 6 shows a specific structural schematic diagram, in the structure shown in fig. 6, one first cavity 12 corresponds to two second cavities 22, and the signal transmission layer 20 adopts a strip line structure, that is, the signal transmission layer 20 is a second strip line, and the signal transmission line is a second strip line inner conductor 21b. As shown in fig. 6, two second strip lines are simultaneously connected to one first strip line 10; the circuit connected to the first strip line inner conductor 11 in the first strip line 10 includes not only a power divider circuit for transmitting a signal to each cell but also a combiner circuit for combining signals of two second strip line inner conductors 21b corresponding to the first strip line inner conductor 11. When two second cavities 22 are used for each first cavity 12, the frequency band of transmission corresponding to each second stripline inner conductor 21b is different, for example, one of the second stripline inner conductors 21b transmits a signal in the f1 frequency band, and the other second stripline inner conductor 21b transmits a signal in the f2 frequency band. As can be seen from the above description, when the first strip line 10 is correspondingly connected with the plurality of second strip line inner conductors 21b, signal transmission of a plurality of different frequency bands can be realized, thereby improving the frequency band of the whole antenna transmission.
Example 5
Example 5 differs from example 1 in that: the radiation unit of the embodiment 5 is added with an auxiliary printed circuit substrate 30, and the printed circuit substrate 30 is firstly connected with the inner and outer conductors of the feeder line of the radiation unit and then connected with the reflecting surface ground layer 14 of the first strip line 10; in principle, the feeder outer conductor is electrically connected to the reflector ground 14, and the feeder inner core is electrically connected to the second stripline inner conductor 21b.
In a specific arrangement, as shown in fig. 7 and 8, the power feeding system further includes a printed circuit board 30 provided on the reflective surface ground layer 14, and the outer conductor of the power feeding line is electrically connected to the reflective surface ground layer 14 through a first circuit on the printed circuit board 30, and the inner core of the power feeding line is electrically connected to the first stripline inner conductor 11 through a second circuit on the printed circuit board 30. As shown in fig. 8, the antenna unit 40 is first connected to the printed circuit board 30, and the printed circuit board 30 is provided with a first circuit for connecting the feeder outer conductor to the reflector layer 14 and a second circuit for connecting the feeder inner core to the first strip inner conductor 11. The connection between the antenna element 40 and the feed system is facilitated by the switching action of the printed circuit substrate 30 during assembly.
As can be seen from the description of embodiments 1 to 5 above, in the present embodiment, signals are transmitted by using the first strip line 10 and the signal transmission layer 20 (coaxial line 21a or strip line), and the coaxial line 21a and strip line are transmission lines with very low loss; thereby effectively reducing the loss during power feeding. In addition, the first strip line 10 and the signal transmission layer 20 are arranged in a laminated mode, so that the whole feed system is simple in structure, and the assembly efficiency of products can be greatly improved in the aspect of operation.
In addition, the present application further provides an antenna system, as shown in fig. 4 and fig. 9, the antenna system includes at least one antenna element 40, and a feeding system for feeding the at least one antenna element 40, where the feeding system is the feeding system described in any of the above embodiments.
In a specific arrangement, the antenna units 40 are arranged in a plurality and a single row. Each antenna element 40 includes a first radiation element 41, and the first radiation element 41 includes: at least one first radiating balun and a first radiating arm connected to each first radiating balun, at least one of the first radiating arms being a polarized first radiating arm, and each polarized first radiating arm corresponding to a first feeding line core electrically coupled to the first radiating arm; when a feeding system is specifically provided, the number of first strip-line inner conductors 11 in the feeding system corresponds to the number of first feeding line inner cores in each first radiation element 41, that is, when there are two first feeding line inner cores in each first radiation element 41, the number of corresponding first strip-line inner conductors 11 is two. Further, the reflector ground layer 14 of the feeding system is electrically connected to the outer conductor of the first feeding line of each first radiation element 41.
Referring to fig. 1 and 9 together, fig. 1 shows a structure in which each antenna element 40 includes one radiation element, and fig. 9 shows a structure in which each antenna element 40 includes two radiation elements.
Referring first to fig. 1, each antenna element 40 includes a first radiating element 41, and the first radiating element includes at least one first radiating balun, a first radiating arm connected to each first radiating balun, the first radiating arm being at least one polarized first radiating arm, and each polarized first radiating arm corresponding to a first feeding line core electrically coupled to the first radiating arm; and when connected to the feed system, one first strip line 10 corresponds to each polarized first radiation arm, and when specifically connected, the first feed line inner core to which the first radiation arm is connected to the first strip line inner conductor 11, and the reflector ground layer 14 is connected to the outer conductor of the first feed line. As shown in fig. 1, fig. 1 shows a structure in which each antenna element is a dual-polarized antenna element. Specifically, the first radiation element 41 has two polarized radiation arms, in this case, the first radiation element 41 is a dual-polarized radiation element, in this case, the first radiation element 41 includes two first radiation arms polarized in a +45 ° direction and two first radiation arms polarized in a-45 ° direction. The number of the first radiation baluns is multiple, and the multiple first radiation baluns are annularly arranged. When a feeding system is correspondingly arranged, the first strip line 10 of the feeding system comprises two first cavities 12 arranged side by side, and the first strip line inner conductors 11 arranged in the two first cavities 12 are respectively connected with the two feeding line inner cores. In order to improve the signal transmission effect, a partition board is arranged between the two first cavities 12 and used for electromagnetically isolating the two first cavities 12. Therefore, electromagnetic interference is avoided when signals are transmitted, and the effect of the signals in transmission is improved.
As shown in fig. 9, each antenna unit 40 shown in fig. 9 includes two radiation units, specifically, each antenna unit includes two radiation units, which are a first radiation unit 41 and a second radiation unit 42, respectively, and the two radiation units are nested, and the feeding system respectively feeds power to the two radiation units. The first radiation unit 41 can be a first radiation unit as shown in fig. 1, and the second radiation unit 42 is nested in the first radiation unit 41. When specifically arranged, each antenna unit 40 further includes a second radiation unit 42 nested in a space surrounded by the plurality of first radiation baluns, where the second radiation unit 42 includes at least one second radiation balun and a second radiation arm connected to each second radiation balun, at least one of the second radiation arms is a polarized second radiation arm, and each polarized second radiation arm corresponds to an inner core of a second feeding line electrically coupled thereto; as shown in fig. 9, the second radiating element 42 is also a dual-polarized radiating element, and when the feeding system is set up, the first strip line 10 needs two first strip line inner conductors 11 for feeding the second radiating element 42 in addition to two first strip line inner conductors 11 for feeding the first radiating element 41. At this time, the number of the first cavities 12 is four and the first cavities are arranged in a single row, wherein the first strip line inner conductors 11 in the two first cavities 12 at the two ends feed the first radiating element 41, and the first strip line inner conductors 11 in the two first cavities 12 in the middle feed the second radiating element 42. In addition, the signal transmission layer 20 in the feeding system can be configured in the manner as in embodiments 1 to 5, and will not be described in detail herein.
In this embodiment, each antenna unit includes the first radiation unit 41 and the second radiation unit 42, so that each antenna unit can perform radiation in two frequency bands, and a feeding system composed of each set of the first strip line 10 and the second strip line feeds each polarization of each frequency band, that is, in principle, each polarization channel feeds independently.
The present application further provides a base station, which includes the antenna system of any of the above embodiments. The antenna system may be the antenna system shown in fig. 4 or the antenna system shown in fig. 9, and may be specifically selected according to actual situations. However, no matter which antenna system is adopted, the feeding system in the antenna system adopts the coaxial line 21a or the strip line to transmit signals, and the coaxial line 21a and the strip line are transmission lines with low loss; thereby effectively reducing the loss during power feeding. In addition, the first strip line 10 and the signal transmission layer 20 are arranged in a laminated mode, so that the whole feed system is simple in structure, and the assembly efficiency of products can be greatly improved in the aspect of operation.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A feeding system comprising a first strip line and a signal transmission layer which are laminated, wherein,
the first strip line includes: the antenna system comprises at least one first cavity and a plurality of first strip-line inner conductors which are arranged in each first cavity and arranged along the length direction of the first cavity, wherein each first strip-line inner conductor is used for being electrically connected with a feed line inner core connected with at least one radiating unit in the antenna system; the top side wall of each first cavity is a reflecting surface ground layer capable of reflecting radiation waves, and the reflecting surface ground layer is used for being electrically connected with the feed outer conductor of the radiation unit;
the signal transmission layer includes: a second cavity stacked corresponding to each first cavity; a signal transmission line disposed within each second cavity, wherein for the corresponding first and second cavities, each signal transmission line is electrically connected to the plurality of first stripline inner conductors;
the signal transmission layer is a second strip line, and the signal transmission line is a second strip line inner conductor;
the second strip line inner conductor penetrates through the side wall between the first cavity and the second cavity and is electrically connected with the first strip line inner conductor corresponding to the second strip line inner conductor; a part of the second strip line inner conductor is used as a contact pin;
the width direction of the second strip line inner conductor is perpendicular to the width direction of the first strip line.
2. The feed system of claim 1, wherein each of said second stripline inner conductors has a dielectric disposed thereon that is slidable relative to said stripline inner conductors.
3. The feed system of claim 1 or 2, further comprising a printed circuit substrate disposed on the reflector ground layer, and wherein an outer conductor of a feed line in the antenna system is electrically connected to the reflector ground layer through a first circuit on the printed circuit substrate, and the feed line inner core is electrically connected to the first stripline inner conductor through a second circuit on the printed circuit substrate.
4. The feed system of claim 1 or 2, wherein at least one of the first cavities and at least one of the second cavities share a metal sidewall therebetween.
5. An antenna system, comprising at least one antenna element, a feeding system for feeding said at least one antenna element, said feeding system being as claimed in any one of claims 1 to 4.
6. The antenna system of claim 5, wherein each antenna element is a dual polarized antenna element.
7. The antenna system of claim 5, wherein each antenna element comprises two radiating elements, and the two radiating elements are nested, and wherein the feed system feeds the two radiating elements separately.
8. The antenna system according to any of claims 5 to 7, wherein the antenna elements are provided in plurality and in a single row.
9. A base station comprising an antenna system according to any of claims 5 to 8.
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| CN202110653671.8A CN113555677B (en) | 2017-11-28 | 2017-11-28 | Feed system, antenna system and base station |
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| CN201711216271.0A CN109841963B (en) | 2017-11-28 | 2017-11-28 | Feed system, antenna system and base station |
| CN202110653671.8A CN113555677B (en) | 2017-11-28 | 2017-11-28 | Feed system, antenna system and base station |
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| CN110600891A (en) * | 2019-09-03 | 2019-12-20 | 广东博纬通信科技有限公司 | 5G array antenna |
| CN111525230A (en) * | 2020-05-09 | 2020-08-11 | 京信通信技术(广州)有限公司 | Antenna with a shield |
| CN212412206U (en) * | 2020-06-11 | 2021-01-26 | 京信通信技术(广州)有限公司 | Feed network, antenna system and base station |
| CN111600126A (en) * | 2020-06-30 | 2020-08-28 | 京信通信技术(广州)有限公司 | Miniaturized antenna |
| CN112421225B (en) * | 2020-10-21 | 2022-07-19 | 武汉虹信科技发展有限责任公司 | Lumped feed device and base station antenna |
| EP4246725A4 (en) * | 2020-12-24 | 2024-01-03 | Huawei Tech Co Ltd | Feed structure for antenna, antenna, and communication system |
| CN113241522B (en) * | 2021-03-22 | 2023-10-13 | 广东通宇通讯股份有限公司 | Feed system of antenna array |
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| Publication number | Publication date |
|---|---|
| CN109841963B (en) | 2021-06-15 |
| CN113555677A (en) | 2021-10-26 |
| CN109841963A (en) | 2019-06-04 |
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