CN113346222A - Low-frequency oscillator and antenna device - Google Patents
Low-frequency oscillator and antenna device Download PDFInfo
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- CN113346222A CN113346222A CN202110558457.4A CN202110558457A CN113346222A CN 113346222 A CN113346222 A CN 113346222A CN 202110558457 A CN202110558457 A CN 202110558457A CN 113346222 A CN113346222 A CN 113346222A
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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
- H01Q1/50—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
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/106—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using two or more intersecting plane surfaces, e.g. corner reflector 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
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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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
Abstract
The application provides a low-frequency oscillator and an antenna device. The low-frequency oscillator comprises a base, a feed structure, a bearing piece and an oscillator arm assembly, wherein the feed structure is arranged on the base; the oscillator arm assembly comprises a plurality of oscillator arm units arranged on the rectangular frame body, the oscillator arm units are arranged corresponding to the feed structure, and the oscillator arm units are distributed in a central symmetry mode relative to the center of the rectangular frame body; the vibrator arm unit comprises two vibrator arms forming an angle with each other, and the extension direction of the vibrator arms is consistent with that of the side edges of the rectangular frame body where the vibrator arms are located; the vibrator arm comprises at least two main conductive parts arranged at intervals and a conductive connecting arm connected between every two adjacent main conductive parts, and the middle part of the conductive connecting arm is bent towards the center of the rectangular frame body. The antenna device is small in size and easy to install and debug.
Description
Technical Field
The application relates to the technical field of wireless communication, in particular to a low-frequency oscillator and an antenna device.
Background
With the increase of complexity of a wireless communication system, the frequency bands used by the wireless communication system are more, and the modes are increased, which requires that the frequency bands and modes supported by the antenna are correspondingly increased, but the placement position of the antenna on the base station is very limited, and the dual requirements from the network and the position of the base station become the necessary choice of multi-frequency and multi-mode of the same antenna.
The existing multi-frequency antenna comprises a reflecting plate and a plurality of radiating units arranged on the reflecting plate, wherein each radiating unit comprises a high-frequency oscillator and a low-frequency oscillator, and when the distance between the high-frequency radiating unit and the low-frequency radiating unit is close, the high-frequency radiating unit and the low-frequency radiating unit are seriously coupled with each other, so that a directional diagram is distorted, and the radiation performance of the antenna is deteriorated; to prevent pattern distortion, three measures are generally taken in the prior art: the first is to add decoupling device between the high and low frequency radiating elements of the antenna; secondly, the distance between the high-frequency radiating unit and the low-frequency radiating unit is increased; thirdly, a cross-shaped low-frequency oscillator is arranged in a radiation unit of the antenna.
However, the addition of the decoupling device increases the complexity of the antenna and increases the difficulty in mounting and debugging the antenna; the arrangement of the high-frequency radiating unit and the low-frequency radiating unit is restricted by increasing the distance between the high-frequency radiating unit and the low-frequency radiating unit, so that the windward area of the antenna is too large; the low-frequency oscillator of the cross shape has low gain, and the antenna length and the deployment difficulty of the antenna are increased to meet the requirement of more unit numbers. Therefore, the current antenna structure can deteriorate the performance of the antenna.
Disclosure of Invention
The application provides a low frequency oscillator and antenna device, wherein, antenna device's volume is less, and easy installation and debugging.
On one hand, the application provides a low-frequency oscillator, which comprises a base, a feed structure, a bearing piece and an oscillator arm assembly, wherein the feed structure is arranged on the base; the oscillator arm assembly comprises a plurality of oscillator arm units arranged on the rectangular frame body, the oscillator arm units are arranged corresponding to the feed structure, and the oscillator arm units are distributed in a central symmetry mode relative to the center of the rectangular frame body; the vibrator arm unit comprises two vibrator arms forming an angle with each other, and the extension direction of the vibrator arms is consistent with that of the side edges of the rectangular frame body where the vibrator arms are located; the vibrator arm comprises at least two main conductive parts arranged at intervals and a conductive connecting arm connected between every two adjacent main conductive parts, and the middle part of the conductive connecting arm is bent towards the center of the rectangular frame body.
Optionally, in the low-frequency oscillator provided by the application, the conductive connection arm includes two extension sections, the two extension sections respectively correspond to two adjacent main conductive portions to which the conductive connection arm is connected, first ends of the two extension sections are connected with the corresponding main conductive portions, and second ends of the two extension sections are connected with each other.
Optionally, in the low-frequency oscillator provided by the present application, an extending direction of the extending section is perpendicular to a connecting direction of two adjacent main conductive portions.
Optionally, in the low-frequency oscillator provided by the present application, the two extending sections included in the conductive connecting arm are symmetrically disposed.
Optionally, in the low-frequency oscillator provided by the present application, the conductive connecting arm and the main conductive portion are located in the same plane.
Optionally, in the low-frequency oscillator provided by the present application, the number of the bases is multiple, and the bases are disposed corresponding to the feed structure.
Optionally, in the low-frequency oscillator provided by the present application, in each oscillator arm unit, an angle between extending directions of the two oscillator arms is 90 °.
Optionally, in the low-frequency oscillator provided by the present application, each oscillator arm includes three main conductive portions arranged at intervals.
In another aspect, the present application provides an antenna apparatus, including a reflector plate and an antenna array disposed on the reflector plate, where the antenna array includes a plurality of radiation sub-arrays parallel to each other, and the plurality of radiation sub-arrays include a first radiation sub-array and a second radiation sub-array, and the first radiation sub-array and the second radiation sub-array are distributed in a staggered manner; one of the first radiation subarray and the second radiation subarray comprises a plurality of low-frequency oscillators and a plurality of first high-frequency oscillators, the other one of the first radiation subarray and the second radiation subarray comprises a plurality of second high-frequency oscillators distributed at intervals, and projections of the first high-frequency oscillators and the second high-frequency oscillators in the arrangement direction of the plurality of radiation subarrays are not overlapped.
Optionally, in the antenna device provided by the present application, a radome is further included, and the reflector plate and the antenna array are both located inside the radome.
In the low-frequency oscillator and the antenna device provided by the application, the low-frequency oscillator comprises a base, a feed structure, a bearing piece and an oscillator arm assembly, wherein the feed structure is arranged on the base; the oscillator arm assembly comprises a plurality of oscillator arm units arranged on the rectangular frame body, the oscillator arm units are arranged corresponding to the feed structure, and the oscillator arm units are distributed in a central symmetry mode relative to the center of the rectangular frame body; the vibrator arm unit comprises two vibrator arms forming an angle with each other, and the extension direction of the vibrator arms is consistent with that of the side edges of the rectangular frame body where the vibrator arms are located; the vibrator arm comprises at least two main conductive parts arranged at intervals and a conductive connecting arm connected between every two adjacent main conductive parts, and the middle part of the conductive connecting arm is bent towards the center of the rectangular frame body. The antenna device provided by the application is small in size and easy to install and debug.
The construction of the present application and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an antenna device according to an embodiment of the present application;
fig. 2a is a schematic diagram of an internal structure of an antenna device according to an embodiment of the present application;
fig. 2b is a top view of an internal structure of an antenna device according to an embodiment of the present application;
fig. 2c is a partial schematic structural diagram of an internal structure of an antenna device according to an embodiment of the present application;
fig. 3a is a schematic structural diagram of a low-frequency oscillator according to an embodiment of the present disclosure;
fig. 3b is a schematic structural diagram of a low frequency oscillator provided in an embodiment of the present application along a top view direction of fig. 3 a;
fig. 4 is a schematic structural diagram of a base in a low-frequency oscillator according to an embodiment of the present disclosure;
fig. 5a is a schematic structural diagram of a feeding structure in a low-frequency oscillator provided in an embodiment of the present application;
fig. 5b is a schematic structural diagram of a feeding structure in a low-frequency oscillator according to an embodiment of the present application;
FIG. 6 is a schematic partial structure view of FIG. 3 b;
FIG. 7a is a directional diagram of a single high frequency oscillator;
fig. 7b is a directional diagram of a high-frequency oscillator in a conventional antenna device;
fig. 7c is a directional diagram of a second high-frequency oscillator of the first high-frequency oscillator in the antenna device according to the embodiment of the present application;
fig. 8 is a comparison diagram of the high-frequency oscillator under the 3dB beamwidth in the three cases corresponding to fig. 7a, 7b and 7 c.
Description of reference numerals:
1-a base; 11-mounting grooves; 12-mounting holes; 13-connecting holes; 2-a feed structure; 21-a feed line; 22-a body; 3-a carrier; 4-a vibrator arm assembly; 41-vibrator arm unit; 411-vibrator arm; 4111-a main conductive part; 4112-an electrically conductive connecting arm; 41121-an extension section; 41122-transition joint section; 10-a reflector plate; 20-an antenna array; 201-radiating subarrays; 2011-first radiating subarray; 2012-a second radiating subarray; 30-a radome; 40-a barrier; 401. 401a, 401 b-a first barrier; 4011-barrier section; 402-a second barrier; 4021-a barrier; 100-a low frequency oscillator; 200-a first high-frequency oscillator; 300-second high frequency oscillator.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that, in the description of the present application, the terms "first" and "second" are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Antennas are important components of mobile communication systems and are directly related to the coverage and quality of service of mobile communication networks. With the increase of complexity of a wireless communication system, the frequency bands used by the wireless communication system are more, and the modes are increased, which requires that the frequency bands and modes supported by the antenna are correspondingly increased, but the placement position of the antenna on the base station is very limited, and the dual requirements from the network and the position of the base station become the necessary choice of multi-frequency and multi-mode of the same antenna.
The existing multi-frequency antenna comprises a reflecting plate and a plurality of radiating units arranged on the reflecting plate, wherein each radiating unit comprises a high-frequency oscillator and a low-frequency oscillator, and when the distance between the high-frequency radiating unit and the low-frequency radiating unit is close, the high-frequency radiating unit and the low-frequency radiating unit are seriously coupled with each other, so that a directional diagram is distorted, and the radiation performance of the antenna is deteriorated; to prevent pattern distortion, three measures are generally taken in the prior art: the first is to add decoupling device between the high and low frequency radiating elements of the antenna; secondly, the distance between the high-frequency radiating unit and the low-frequency radiating unit is increased; thirdly, a low-frequency vibrator shaped like a cross is arranged; however, the addition of the decoupling device increases the complexity of the antenna and increases the difficulty in mounting and debugging the antenna; the arrangement of the high-frequency radiating unit and the low-frequency radiating unit is restricted by increasing the distance between the high-frequency radiating unit and the low-frequency radiating unit, so that the windward area of the antenna is too large; the low-frequency oscillator of the cross shape has low gain, and the antenna length and the deployment difficulty of the antenna are increased to meet the requirement of more unit numbers.
Therefore, the current antenna structure can deteriorate the performance of the antenna.
Therefore, the present application provides a low frequency oscillator and an antenna device to overcome the above-mentioned drawbacks.
The embodiments of the present application will be described below with reference to the accompanying drawings and detailed description.
Fig. 1 is a schematic structural diagram of an antenna device according to an embodiment of the present application. Fig. 2a is a schematic diagram of an internal structure of an antenna device according to an embodiment of the present application.
As shown in fig. 1 and fig. 2a, an embodiment of the present application provides an antenna device, which includes a reflector 10, an antenna array 20 disposed on the reflector 10, and an antenna housing 30, where the reflector 10 and the antenna array 20 are both located inside the antenna housing 30, and the antenna housing 30 may be made of glass fiber reinforced plastic (frp) or rigid Polyvinyl Chloride (UPVC).
In the antenna device provided in the embodiment of the present application, the antenna array 20 includes a plurality of radiation sub-arrays 201 parallel to each other, the plurality of radiation sub-arrays 201 includes a first radiation sub-array 2011 and a second radiation sub-array 2012, and the first radiation sub-array 2011 and the second radiation sub-array 2012 are distributed in a staggered manner; one of the first radiation sub-array 2011 and the second radiation sub-array 2012 includes a plurality of low frequency elements 100 and a plurality of first high frequency elements 200, and the other includes a plurality of second high frequency elements 300 distributed at intervals. Wherein, the low frequency oscillator 100 works at 820-960 MHz.
In order to prevent interference between the first high-frequency oscillator 200 and the second high-frequency oscillator 300, projections of the first high-frequency oscillator 200 and the second high-frequency oscillator 300 in the arrangement direction of the plurality of radiation sub-arrays 201 are not overlapped, so that the distance between the first high-frequency oscillator 200 and the second high-frequency oscillator 300 can be increased, interference between the first high-frequency oscillator 200 and the second high-frequency oscillator 300 can be prevented, and the adjacent first radiation sub-array 2011 and the adjacent second radiation sub-array 2012 can be operated independently.
In some alternative embodiments, the distance between the low frequency element 100 and the first high frequency element 200 may be 0.77 λ, where λ refers to the wavelength corresponding to the center frequency of the antenna device. Note that, according to the actual requirements of the antenna device, the distance between the low-frequency element 100 and the first high-frequency element 200 may be appropriately adjusted according to the change of the width of the antenna device, and the specific adjustment is not described here.
In a specific implementation of the present embodiment, the antenna array 20 includes two first radiation sub-arrays 2011 and two second radiation sub-arrays 2012.
Further, the first radiation sub-array 2011 includes a plurality of low frequency elements 100 and a plurality of first high frequency elements 200, and the second radiation sub-array 2012 includes a plurality of second high frequency elements 300 distributed at intervals.
In some alternative embodiments, the first high-frequency element 200 may be nested in the low-frequency element 100 or the first high-frequency element 200 may not be nested in the first radiation sub-array 2011. The shape of the opening of the low-frequency oscillator 100 may be square or diamond, and the manner of fitting the low-frequency oscillator 100 and the first high-frequency oscillator 200 and the shape of the low-frequency oscillator 100 are not particularly limited.
In order to increase the gain of the first high-frequency oscillator 200 in the first radiation subarray 2011, in the first radiation subarray 2011 of the present embodiment, the first high-frequency oscillator 200 is nested in the low-frequency oscillator 100, and one first high-frequency oscillator 200 is disposed between two adjacent low-frequency oscillators 100, so that the internal space of the low-frequency oscillators 100 can be fully utilized, and thus, the number of the first high-frequency oscillators 200 is increased without increasing the installation area, and the gain of the first high-frequency oscillator 200 is increased.
Fig. 2b is a top view of an internal structure of the antenna device according to the embodiment of the present application. Fig. 2c is a partial schematic structural diagram of an internal structure of an antenna device according to an embodiment of the present application.
As shown in fig. 2b and 2c, in order to further prevent interference between the first high-frequency element 200 and the second high-frequency element 300, the antenna apparatus provided in this embodiment further includes a blocking member 40 disposed on the reflection plate 10, the blocking member 40 includes a first blocking member 401, the first blocking member 401 includes a first blocking member 401a and a first blocking member 401b, the first blocking member 401a is disposed on one side of the reflection plate 10 in the width direction thereof, and the first blocking member 401a faces the second radiation subarray 2012, the first blocking member 401b is disposed between the adjacent first radiation subarray 2011 and the second radiation subarray 2012, and an end of the first blocking member 401b in the length direction of the reflection plate 10 extends to the outside of the second high-frequency element 300 in the direction.
Further, in order to avoid the low frequency vibrator 100, the first barrier 401b includes a plurality of barrier sections 4011 to form a space avoiding the low frequency vibrator 100 between adjacent barrier sections 4011.
In order to prevent the external environment from interfering with the low frequency oscillator 100, the blocking member 40 further includes a second blocking member 402, the second blocking member 402 is disposed on the other side of the reflection plate 10 along the width direction thereof, the second blocking member 402 has a plurality of blocking portions 4021, and the blocking portions 4021 are disposed corresponding to the low frequency oscillator 100 and protrude toward the low frequency oscillator 100.
The reflection plate 10 is a plate-like member made of metal, and may be an aluminum plate.
When the first high-frequency oscillator 200 (the second high-frequency oscillator 300) is close to the low-frequency oscillator 100, the conventional low-frequency oscillator arm can shield the high-frequency oscillator, high-frequency induced current is generated on the low-frequency oscillator arm, and the high-frequency induced current is secondarily radiated to greatly influence a high-frequency directional diagram, so that the high-frequency directional diagram is prevented from being influenced by the induced current secondary radiation of the electromagnetic field radiated by the first high-frequency oscillator 200 or the electromagnetic field radiated by the second high-frequency oscillator 300 at the low-frequency oscillator 100. The embodiment of the present application further provides a low frequency oscillator 100, in which a metal strip is disposed between oscillator arms, so that secondary radiation fields generated by induced currents generated by the first high frequency oscillator 200 or the second high frequency oscillator 300 concentrated on the metal strip can be mutually cancelled out due to folding of the metal strip, thereby preventing a high frequency pattern from being distorted.
The low-frequency oscillator provided by the embodiment of the present application is described below with reference to the drawings and the detailed description.
Fig. 3a is a schematic structural diagram of a low-frequency oscillator provided in an embodiment of the present application. Fig. 3b is a schematic structural diagram of the low frequency oscillator provided in the embodiment of the present application along a top view direction of fig. 3 a.
As shown in fig. 3a and 3b, the present embodiment provides a low frequency oscillator 100, which includes a base 1, a feeding structure 2, a carrier 3, and an oscillator arm assembly 4, where the base 1 is detachably connected to a reflection plate 10, the feeding structure 2 is disposed on the base 1, the carrier 3 includes a rectangular frame, and the feeding structure 2 is located at a corner of the rectangular frame; the oscillator arm assembly 4 comprises a plurality of oscillator arm units 41 arranged on a rectangular frame body, the oscillator arm units 41 are arranged corresponding to the feed structure 2, and the plurality of oscillator arm units 41 are distributed in central symmetry relative to the center of the rectangular frame body; the oscillator arm unit 41 comprises two oscillator arms 411 which form an angle with each other, and the extending direction of the oscillator arms 411 is consistent with the extending direction of the side edge of the rectangular frame body where the oscillator arms are located; the vibrator arm 411 includes at least two main conductive portions 4111 arranged at an interval and a conductive connecting arm 4112 connected between two adjacent main conductive portions 4111, and a middle portion of the conductive connecting arm 4112 is bent toward a center of the rectangular frame. In the low frequency oscillator 100 provided in this embodiment, because the adjacent main conductive portions 4111 are connected through the conductive connecting arm 4112, and the middle portion of the conductive connecting arm 4112 is bent toward the center of the rectangular frame, so that the induced current generated by the first high frequency oscillator 200 or the second high frequency oscillator 300 can be concentrated on the conductive connecting arm 4112, two electromagnetic fields with opposite directions are formed on the conductive connecting arm 4112 to cancel each other, thereby avoiding the induced current secondary radiation generated by the first high frequency oscillator 200 or the second high frequency oscillator 300 at the low frequency oscillator 100, increasing the gain of the low frequency oscillator 100, and preventing the high frequency pattern from being distorted.
It should be noted that the main conductive portion 4111 and the conductive connecting arm 4112 are made of metal, which may be copper, and the specific type of metal that makes up the main conductive portion 4111 and the conductive connecting arm 4112 is not limited herein.
In a specific implementation manner of this embodiment, a plurality of bases 1 are provided, the bases 1 are disposed corresponding to the feed structures 2, and one end of the feed structure 2 is connected to the bases 1, wherein the bases 1 and the feed structures 2 are both made of PCBs, a copper foil is covered on a surface of the bases adjacent to the reflector 10, and a layer of green oil is covered on the copper foil, so that passive intermodulation degradation caused by direct contact between the copper foil and the reflector 10 is avoided, and the electrical coupling connection between the bases 1 and the reflector 10 is also realized, thereby forming a common signal ground; the feed structure 2 is also coated with copper layers on both sides in the thickness direction thereof, and specifically, the copper layers on both sides are connected by dielectric coupling to achieve good impedance matching within a frequency band. The medium will not be described in detail here.
Fig. 4 is a schematic structural diagram of a base in a low-frequency oscillator according to an embodiment of the present application. Fig. 5a is a schematic structural diagram of a feeding structure in a low-frequency oscillator according to an embodiment of the present application.
As shown in fig. 4 and 5a, the base 1 has a mounting groove 11, a mounting hole 12 and a connection hole 13, and one end of the power feeding structure 2 is inserted into the mounting groove 11 and welded to the mounting groove 11; the mounting hole 12 is used for penetrating a threaded fastener so as to fix the base 1 on the reflecting plate 10; the feeding structure 2 is provided with a feeding line 21, a first end of the feeding line 21 is electrically connected to the connecting hole 13, and a second end of the feeding line 21 is electrically connected to a main body 22 of the feeding structure 2, so that balanced feeding is realized.
It should be noted that the feeding mode is generally a mode of coaxial wire welding to transmit signals to the low-frequency oscillator or the high-frequency oscillator in the antenna array 20, specifically, the inner conductor of the coaxial wire is welded to the bottom of the feeding line 21 through the connecting hole 13, and the outer conductor of the coaxial wire is welded to the bottom of the base 1.
Fig. 5b is a schematic structural diagram of a feeding structure in a low-frequency oscillator according to an embodiment of the present application.
As shown in fig. 5b, one side of the main body 22 facing the rectangular frame has two protrusions 221, the protrusions 221 can be connected to the main conductive portion 4111 located at the corner of the rectangular frame, specifically, the main conductive portion 4111 located at the corner of the rectangular frame has an insertion hole 41111, and the protrusions 221 are connected to the insertion hole 41111 and protrude out of the insertion hole 41111, so that the connection between the feeding structure 2 and the vibrator arm 411 is achieved.
In this embodiment, the carrier 3 and the vibrator arm 411 are combined together to form a PCB, wherein the carrier 3 is a dielectric substrate, the vibrator arm 411 is a copper layer, the thickness of the vibrator arm 411 is small, and the vibrator arm 411 is covered on the carrier 3 through a specific process, and the specific material of the carrier 3 and the connection process between the vibrator arm 411 and the carrier 3 are not particularly limited.
It should be noted that the low-frequency oscillator 100 is a dual-polarized low-frequency oscillator, and is made of a PCB, specifically, when a radio wave propagates in a space, the direction of an electric field thereof changes according to a certain rule, and this phenomenon is the polarization of the radio wave; the dual-polarized low-frequency oscillator is composed of two oscillators with orthogonal polarization.
In some optional embodiments, the standing-wave ratio of the low-frequency oscillator 100 is less than 1.3, and the isolation is less than-28 dB, where the standing-wave ratio is an index representing the matching degree between the antenna feeder and the base station, and is generated because the incident wave energy is not completely reflected after being transmitted to the antenna input end, and a reflected wave is generated and superimposed; isolation refers to the ratio of the signal transmitted by one antenna to the power of the signal received by another antenna.
Fig. 6 is a partial schematic view of fig. 3 b.
As shown in fig. 6, in a specific embodiment of this embodiment, the conductive connecting arm 4112 includes two extending sections 41121, the two extending sections 41121 are distributed in the same direction as the extending direction of the side of the rectangular frame where the two extending sections 41121 are located, the two extending sections 41121 respectively correspond to two adjacent main conductive portions 4111 to which the conductive connecting arm 4112 is connected, first ends of the two extending sections 41121 are connected to the corresponding main conductive portions 4111, and second ends of the two extending sections 41121 are connected to each other. In this way, when the induced current generated by the first high-frequency oscillator 200 or the second high-frequency oscillator 300 is concentrated on the low-frequency oscillator 100, electromagnetic fields in opposite directions can be generated between the two extending sections 41121 to cancel each other out, and the induced current generated by the first high-frequency oscillator 200 or the second high-frequency oscillator 300 at the low-frequency oscillator 100 can be prevented from being secondarily radiated to affect the high-frequency pattern.
Further, in the present embodiment, the extending direction of the extending section 41121 and the connecting direction of two adjacent main conductive portions 4111 are perpendicular to each other. In this way, the strength of the electromagnetic field cancelled at each of the two extending sections 41121 is made uniform to further avoid distortion of the high-frequency pattern.
In order to ensure that the first high frequency oscillator 200 and the second high frequency oscillator 300 do not generate secondary radiation of induced current in each direction, in the present embodiment, the two extending sections 41121 included in the conductive connecting arm 4112 are symmetrically arranged, so as to ensure that the induced current generated by the first high frequency oscillator 200 and the second high frequency oscillator 300 is not radiated secondarily in different oscillator arm units 41, thereby preventing distortion of high frequency patterns.
In a specific embodiment of this embodiment, the conductive connecting arm 4112 and the main conductive portion 4111 are located in the same plane, so that in this embodiment, the induced currents generated by the first high-frequency oscillator 200 and the second high-frequency oscillator 300 can be ensured to be radiated normally in all directions, and the high-frequency pattern is prevented from being distorted.
As shown in fig. 6, in the present embodiment, the conductive connection arm 4112 further includes a transition connection segment 41122 connected between the two extension segments 41121, the extension direction of the transition connection segment 41122 is perpendicular to the extension direction of the extension segment 41121, and the transition connection segment 41122 is connected to an end of the extension segment 41121 facing the rectangular frame, so that the conductive connection arm 4112 has a "U" shape.
In a specific embodiment of this embodiment, in order to realize dual polarization of low-frequency oscillator 100, in each oscillator arm unit 41, an angle between extending directions of two oscillator arms 411 is 90 °.
In some alternative embodiments, each of the vibrator arms 411 includes three main conductive portions 4111 arranged at intervals, and particularly, the main conductive portions 4111 positioned at the corners of the rectangular frame have inclined surfaces arranged opposite to the other vibrator arm 411 in the vibrator arm assembly 4.
In the low frequency oscillator 100 provided in the present embodiment, the oscillator arm units 41 on different diagonal lines are simultaneously fed, and thus the directivity of the low frequency oscillator 100 can be effectively increased.
To further explain that the low frequency oscillator 100 provided in the present embodiment can effectively prevent the patterns of the first high frequency oscillator 200 and the second high frequency oscillator 300 from being distorted, the following description is made with reference to specific drawings.
Fig. 7a shows the directional diagram of a single high-frequency oscillator. Fig. 7b shows a directional diagram of a high-frequency oscillator in a conventional antenna device. Fig. 7c is a directional diagram of a second high-frequency oscillator of the first high-frequency oscillator in the antenna device according to the embodiment of the present application, and fig. 8 is a comparison diagram of the high-frequency oscillators in the three cases corresponding to fig. 7a, 7b, and 7c under the beam width of 3 dB.
As shown in fig. 7a to 8, in which the abscissa represents a direction angle and the ordinate represents a normalized level value, the variation of the return loss of the high-frequency oscillator at different frequencies with the variation of the direction angle can be seen in each graph, and since a certain error may exist in the boundary region of the directional diagram, the central position of the directional diagram is mainly observed when the directional diagram is analyzed.
As can be seen from fig. 7a to 8, the antenna device according to the embodiment of the present invention has a good fit between the high-frequency 3dB beam width and the single high frequency, and thus, in the low-frequency oscillator 100 provided by the present application, the conductive connecting arm 4112 is disposed in the oscillator arm 411, so that the induced current generated by the first high-frequency oscillator 200 or the second high-frequency oscillator 300 can be prevented from being radiated secondarily in the low-frequency oscillator 100, and the pattern of the first high-frequency oscillator 200 or the second high-frequency oscillator 300 is prevented from being distorted.
In the low-frequency oscillator and the antenna device provided by the embodiment of the application, the antenna device comprises the low-frequency oscillator, the low-frequency oscillator comprises a base, a feed structure, a bearing piece and an oscillator arm assembly, the feed structure is arranged on the base, the bearing piece comprises a rectangular frame body, and the feed structure is positioned at the corner of the rectangular frame body; the oscillator arm assembly comprises a plurality of oscillator arm units arranged on the rectangular frame body, the oscillator arm units are arranged corresponding to the feed structure, and the oscillator arm units are distributed in a central symmetry mode relative to the center of the rectangular frame body; the vibrator arm unit comprises two vibrator arms forming an angle with each other, and the extension direction of the vibrator arms is consistent with that of the side edges of the rectangular frame body where the vibrator arms are located; the vibrator arm comprises at least two main conductive parts arranged at intervals and a conductive connecting arm connected between every two adjacent main conductive parts, and the middle part of the conductive connecting arm is bent towards the center of the rectangular frame body. Therefore, the high-frequency directional diagram can be prevented from being distorted, and the antenna device provided by the embodiment has better service performance.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The low-frequency oscillator is characterized by comprising a base, a feed structure, a bearing piece and an oscillator arm assembly, wherein the feed structure is arranged on the base, the bearing piece comprises a rectangular frame body, and the feed structure is positioned at the corner of the rectangular frame body;
the oscillator arm assembly comprises a plurality of oscillator arm units arranged on the rectangular frame body, the oscillator arm units are arranged corresponding to the feed structure, and the oscillator arm units are distributed in a centrosymmetric manner relative to the center of the rectangular frame body;
the vibrator arm unit comprises two vibrator arms forming an angle with each other, and the extension direction of the vibrator arms is consistent with that of the side edge of the rectangular frame body where the vibrator arms are located; the vibrator arm comprises at least two main conductive parts arranged at intervals and a conductive connecting arm connected between every two adjacent main conductive parts, and the middle part of the conductive connecting arm bends towards the center of the rectangular frame body.
2. The low frequency oscillator according to claim 1, wherein the conductive connection arm includes two extension sections, the two extension sections respectively correspond to two adjacent main conductive portions connected by the conductive connection arm, first ends of the two extension sections are connected to the corresponding main conductive portions, and second ends of the two extension sections are connected to each other.
3. The low frequency oscillator according to claim 2, wherein the extending direction of the extending section is perpendicular to the connecting direction of two adjacent main conductive parts.
4. The low frequency oscillator of claim 3, wherein the two extending sections included in the conductive connecting arm are symmetrically arranged.
5. The low frequency oscillator of any one of claims 1-4, wherein the conductive connection arm and the main conductive portion are located in the same plane.
6. The low frequency oscillator according to claim 5, wherein the plurality of pedestals are provided, and the pedestals are provided corresponding to the feeding structure.
7. The low frequency oscillator according to claim 4 or 6, wherein in each oscillator arm unit, an angle between extending directions of the two oscillator arms is 90 °.
8. The low frequency oscillator of claim 7 wherein each oscillator arm includes three spaced apart primary conductive sections.
9. An antenna device is characterized by comprising a reflecting plate and an antenna array arranged on the reflecting plate, wherein the antenna array comprises a plurality of radiation sub-arrays which are parallel to each other, the plurality of radiation sub-arrays comprise a first radiation sub-array and a second radiation sub-array, and the first radiation sub-array and the second radiation sub-array are distributed in a staggered mode;
one of the first radiation subarray and the second radiation subarray comprises a plurality of low-frequency oscillators and a plurality of first high-frequency oscillators according to any of claims 1 to 8, the other one comprises a plurality of second high-frequency oscillators distributed at intervals, and the projections of the first high-frequency oscillators and the second high-frequency oscillators in the arrangement direction of the plurality of radiation subarrays are not overlapped.
10. The antenna device of claim 9, further comprising a radome, wherein the reflector plate and the antenna array are both located within the radome.
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| CN202110558457.4A CN113346222A (en) | 2021-05-21 | 2021-05-21 | Low-frequency oscillator and antenna device |
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| CN202110558457.4A CN113346222A (en) | 2021-05-21 | 2021-05-21 | Low-frequency oscillator and antenna device |
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| CN112821067A (en) * | 2020-12-31 | 2021-05-18 | 广东博纬通信科技有限公司 | Low-frequency oscillator unit and antenna |
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| CN102683825A (en) * | 2012-05-22 | 2012-09-19 | 摩比科技(西安)有限公司 | Broadband dual-polarized radiation unit and antenna |
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Application publication date: 20210903 |