CN113506981B - Low-scattering antenna and multi-frequency antenna array thereof - Google Patents
Low-scattering antenna and multi-frequency antenna array thereof Download PDFInfo
- Publication number
- CN113506981B CN113506981B CN202110798540.9A CN202110798540A CN113506981B CN 113506981 B CN113506981 B CN 113506981B CN 202110798540 A CN202110798540 A CN 202110798540A CN 113506981 B CN113506981 B CN 113506981B
- Authority
- CN
- China
- Prior art keywords
- transmission line
- antenna
- branch
- microstrip transmission
- balun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a low-scattering antenna and a multi-frequency antenna array thereof, wherein the low-scattering antenna comprises an antenna main radiator, a dielectric top plate, a first feed balun, a second feed balun and an antenna floor; the first feeding balun and the second feeding balun are mutually and vertically connected in a cross mode, the upper ends of the first feeding balun and the second feeding balun are connected with the dielectric top plate, and the lower ends of the first feeding balun and the second feeding balun are connected with the antenna floor; the antenna radiation body is printed on the top surface of the dielectric top plate and comprises a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm; the structure and the size of each radiation arm are the same, and the radiation arm is composed of at least two branches which are sequentially connected along a straight line, wherein the at least two branches have two different widths, and the widths of every two adjacent branches are different from each other. The antenna unit has the characteristics of low scattering and easy arrangement, can effectively avoid mutual interference between the antenna units, and has wide application prospect.
Description
Technical Field
The invention relates to the field of communication antennas, in particular to a low-scattering antenna and a multi-frequency antenna array thereof.
Background
With the advent of the 5G communication era, coexistence of a plurality of mobile communication standards is a current major trend. The multi-frequency antenna array can be used for a plurality of communication frequency bands, simultaneously supports a plurality of communication standards, and has the advantages that a single-frequency antenna cannot compare with the advantages. In addition, with polarization diversity technology, the dual-polarized antenna can increase the channel capacity of the system and also improve the multipath fading of signals. At present, a multi-frequency dual-polarization base station antenna array generally forms an array by arranging low-frequency antenna units and high-frequency antenna units side by side or nesting the antenna units coaxially. The performance of the entire array is therefore determined by the performance of the individual low frequency elements and the individual high frequency elements and the interrelationship between the low frequency elements and the high frequency elements.
The current multi-frequency antenna array can adopt a side-by-side arrangement mode, but because the antenna units with different frequency bands have performance interference, partial radiators can be overlapped in space, so that the radiation performance of the shielded antenna units is influenced, and the performance of the whole array is reduced. If the coaxial nested mode combination is adopted, the problems can be alleviated to a certain degree. However, as the frequency band of the 5G base station antenna is increased to 3.3GHz-3.6GHz and 4.8GHz-5GHz, the spacing of the antenna arrays is reduced, and the coaxial nested arrangement is difficult to realize. There is therefore a need for an antenna element having low scattering properties and which is easy to arrange.
Chinese patent document CN202268481U proposes a dual-polarized array unit, which is bowl-shaped and can form a multi-frequency antenna array with antenna units in other working frequency bands by using a coaxial nesting manner, but the antenna unit with such a structure is more applied to a dual-frequency array, and is not suitable for an array with odd number of frequency bands, and the antenna with a bowl-shaped structure does not have a very low scattering property.
Chinese patent document CN210137016U proposes a multi-frequency antenna array, which uses a die-cast bowl-shaped vibrator, a circular bowl-shaped vibrator and a cross-shaped PCB vibrator as low-frequency vibrators. However, the radiating arm of the cross-shaped PCB oscillator is in a regular rectangular shape, and the radiating arm of the structure can shield the high-frequency oscillator below the radiating arm, thereby reducing the radiation performance of the high-frequency oscillator and affecting the performance of the whole antenna array.
Disclosure of Invention
The present invention is directed to a low-scattering antenna and a multi-frequency antenna array thereof, which have the characteristics of low scattering and easy arrangement, and avoid mutual interference between antenna elements.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-scattering antenna comprises an antenna main radiator, a dielectric top plate, a first feed balun, a second feed balun and an antenna floor;
the first feeding balun and the second feeding balun are mutually and vertically connected in a cross mode, the upper ends of the first feeding balun and the second feeding balun are connected with the dielectric top plate, and the lower ends of the first feeding balun and the second feeding balun are connected with the antenna floor;
the antenna radiation body is printed on the top surface of the dielectric top plate and comprises a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm; each radiation arm has the same structure and size and consists of at least two branches which are sequentially connected along a straight line, wherein the at least two branches have two different widths, and the widths of every two adjacent branches are different from each other;
the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are sequentially arranged in a circumferential direction by taking the center of the medium top plate as a center, and adjacent radiation arms are mutually vertical and are in a cross shape as a whole; the first radiating arm and the third radiating arm are located on the same straight line to form a half-wave oscillator, and the second radiating arm and the fourth radiating arm are located on the same straight line to form another half-wave oscillator.
Furthermore, each radiation arm is composed of a first branch, a second branch, a third branch, a fourth branch and a fifth branch which are sequentially connected along a straight line, wherein the widths of the second branch and the fourth branch are smaller than the widths of the first branch, the third branch and the fifth branch.
Furthermore, one end of the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm where the first branch is located faces the center of the medium top plate; the second branch knot, the third branch knot, the fourth branch knot and the fifth branch knot are rectangular, and the first branch knot is in the shape of an isosceles right triangle.
Further, the widths of the second branch and the fourth branch are equal, the widths of the first branch, the third branch and the fifth branch are equal, and the ratio of the widths of the second branch and the fourth branch to the widths of the first branch, the third branch and the fifth branch is less than 1:30, the sum of the lengths of the first branch, the second branch, the third branch, the fourth branch and the fifth branch is about a quarter of the wavelength corresponding to the central frequency of the working frequency band of the low-scattering antenna.
Further, the first feed balun comprises a first dielectric slab, and a slot transmission line and a microstrip transmission line which are respectively printed on the front surface and the back surface of the first dielectric slab;
the gap transmission line comprises a first gap transmission line and a second gap transmission line, the first gap transmission line and the second gap transmission line extend along the vertical direction, the first gap transmission line is positioned above the middle part of the front surface of the first dielectric slab, and the second gap transmission line is positioned below the middle part of the front surface of the first dielectric slab;
the microstrip transmission line comprises a first microstrip transmission line, a second microstrip transmission line, a third microstrip transmission line, a fourth microstrip transmission line and a fifth microstrip transmission line which are connected in sequence; the fourth microstrip transmission line extends along the horizontal direction and is positioned in the middle of the back surface of the first dielectric slab, and the first microstrip transmission line, the second microstrip transmission line, the third microstrip transmission line and the fifth microstrip transmission line extend along the vertical direction;
the intersection of the fourth microstrip transmission line and the slot transmission line is a feed point; and a through hole is formed in the first dielectric plate corresponding to the first microstrip transmission line.
Further, the second feeding balun comprises a second dielectric slab, and a slot transmission line and a microstrip transmission line which are respectively printed on the front surface and the back surface of the second dielectric slab;
the gap transmission line comprises a third gap transmission line and a fourth gap transmission line, the third gap transmission line and the fourth gap transmission line extend along the vertical direction, the third gap transmission line is positioned above the middle part of the front surface of the second dielectric slab, and the fourth gap transmission line is positioned below the middle part of the front surface of the second dielectric slab;
the microstrip transmission line comprises a sixth microstrip transmission line, a seventh microstrip transmission line, an eighth microstrip transmission line, a ninth microstrip transmission line and a tenth microstrip transmission line which are connected in sequence; the ninth microstrip transmission line extends along the horizontal direction and is positioned in the middle of the back surface of the second dielectric slab, and the sixth microstrip transmission line, the seventh microstrip transmission line, the eighth microstrip transmission line and the tenth microstrip transmission line extend along the vertical direction;
the intersection of the ninth microstrip transmission line and the slot transmission line is a feed point; and a through hole is formed in the second dielectric plate corresponding to the sixth microstrip transmission line.
Furthermore, an upward-opening slot is arranged above the middle part of the first dielectric plate, and a downward-opening slot is arranged below the middle part of the second dielectric plate; the first dielectric plate and the second dielectric plate are mutually inserted through the slots, so that the first feeding balun and the second feeding balun are mutually and vertically connected in a cross mode.
Furthermore, two plug boards protruding upwards are arranged at the upper end of the first feed balun, and two plug boards protruding downwards are arranged at the lower end of the first feed balun;
the upper end of the second feed balun is provided with two plug boards protruding upwards, and the lower end of the second feed balun is provided with two plug boards protruding downwards;
the medium top plate is provided with four jacks, and the antenna floor is provided with four jacks;
the plug boards at the upper ends of the first feed balun and the second feed balun are respectively inserted into the four plug holes of the dielectric top plate so as to realize connection and fixation with the dielectric top plate; the plugboards at the lower ends of the first feed balun and the second feed balun are respectively inserted into the four plugholes of the antenna floor so as to realize the connection and fixation with the antenna floor.
Furthermore, four jacks on the medium top plate are respectively arranged in the middle of the first branches of the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm.
A multi-frequency antenna array comprises the low-scattering antenna, a first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit, wherein the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are positioned at different working frequency bands from the low-scattering antenna; the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are distributed around the low-scattering antenna;
and the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are respectively arranged at the pointed positions of the tail ends of the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm of the low-scattering antenna.
The invention adopts two branches with different widths in the radiation arm, the branch with larger width can be equivalent to a capacitor, and the branch with smaller width is equivalent to an inductor; therefore, the radiation arm is equivalent to a series LC circuit, so that the radiation arm can pass the current of the working frequency band, but restrain the current of other frequency bands, and low scattering property is realized. Through the structure, the antenna unit has the characteristics of low scattering and easy arrangement, can effectively avoid mutual interference among the antenna units, and has wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a low scattering antenna according to an embodiment of the present invention.
Fig. 2 is a distribution diagram of the main radiator of the antenna on the dielectric top plate according to the first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a radiation arm according to a first embodiment of the present invention.
Fig. 4 is a front structural view of the first feeding balun in the first embodiment of the present invention.
Fig. 5 is a back structure diagram of the first feeding balun in the first embodiment of the present invention.
Fig. 6 is a front structural view of a second feeding balun in the first embodiment of the present invention.
Fig. 7 is a back structure diagram of the second feeding balun in the first embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a multi-frequency antenna array according to a second embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a reference example one for comparison with the embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a second reference example for comparison with the embodiment of the present invention.
Fig. 11 is a horizontal half-power beamwidth comparison chart of the second embodiment of the invention and the first and second reference examples within the operating frequency band.
Detailed Description
The technical solution of the present invention will be described below with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1 to fig. 3, a low-scattering antenna provided in an embodiment of the present invention includes an antenna main radiator 1, a dielectric top plate 2, a first feeding balun 3, a second feeding balun 4, and an antenna floor 5;
the first feeding balun 3 and the second feeding balun 4 are perpendicularly and crossly connected with each other, the upper ends of the first feeding balun 3 and the second feeding balun 4 are connected with the dielectric top plate 2, and the lower ends of the first feeding balun 3 and the second feeding balun 4 are connected with the antenna floor 5;
the antenna radiation body is printed on the top surface of the dielectric top plate 2, and the antenna main radiator 1 comprises a first radiation arm 101, a second radiation arm 102, a third radiation arm 103 and a fourth radiation arm 104; each radiation arm has the same structure and size and consists of at least two branches which are sequentially connected along a straight line, wherein the at least two branches have two different widths, and the widths of every two adjacent branches are different from each other;
the first radiation arm 101, the second radiation arm 102, the third radiation arm 103 and the fourth radiation arm 104 are sequentially arranged along the circumferential direction by taking the center of the dielectric top plate 2 as the center, and adjacent radiation arms are mutually vertical and are in a cross shape as a whole; the first radiation arm 101 and the third radiation arm 103 are located on the same straight line to form a half-wave oscillator, and the second radiation arm 102 and the fourth radiation arm 104 are located on the same straight line to form another half-wave oscillator.
As shown in fig. 3, in this embodiment, each radiation arm is composed of a first branch 101a, a second branch 101b, a third branch 101c, a fourth branch 101d, and a fifth branch 101e connected in sequence along a straight line, wherein the widths of the second branch b and the fourth branch d are smaller than the widths of the first branch a, the third branch c, and the fifth branch e.
Further, one end of the first radiation arm 101, the second radiation arm 102, the third radiation arm 103, and the fourth radiation arm 104, where the first branch 101a is located, faces the center of the dielectric top plate 2; the second branch 101b, the third branch 101c, the fourth branch 101d and the fifth branch 101e are rectangular, and the first branch 101a is in the shape of an isosceles right triangle.
Further, the widths of the second branch 101b and the fourth branch 101d are equal, the widths of the first branch 101a, the third branch 101c and the fifth branch 101e are equal, and the ratio of the widths of the second branch 101b and the fourth branch 101d to the widths of the first branch 101a, the third branch 101c and the fifth branch 101e is less than 1:30, the sum of the lengths of the first branch 101a, the second branch 101b, the third branch 101c, the fourth branch 101d, and the fifth branch 101e is about a quarter of a wavelength corresponding to a center frequency of an operating frequency band of the low-scattering antenna.
In the first radiation arm 101, the first branch 101a, the third branch 101c, and the fifth branch 101e having a larger width may be equivalent to capacitors, and the second branch 101b and the fourth branch 101d having a smaller width may be equivalent to inductors, so that the first radiation arm 101 may be equivalent to a series LC circuit, and a current in an operating frequency band may pass through, and a current in other frequency bands may be suppressed, thereby achieving a low scattering characteristic. Similarly, the second radiating arm 102, the third radiating arm 103 and the fourth radiating arm 104 can be equivalent to a series LC circuit, and suppress currents in other frequency bands through currents in the working frequency band.
It should be noted that, in the embodiments of the present invention, the number of branches included in each radiation arm is defined in detail by way of example. However, in the actual engineering implementation, the number of branches on the radiation arm can be increased or decreased according to specific situations so as to obtain good radiation performance.
As shown in fig. 4 and 5, the first feeding balun 3 includes a first dielectric plate 301, and a slot transmission line and a microstrip transmission line 303 printed on the front surface and the back surface of the first dielectric plate, respectively;
the slot transmission line comprises a first slot transmission line 302a and a second slot transmission line 302b, the first slot transmission line 302a and the second slot transmission line 302b extend along the vertical direction, the first slot transmission line 302a is positioned above the middle part of the front surface of the first dielectric slab 301, and the second slot transmission line 302b is positioned below the middle part of the front surface of the first dielectric slab 301;
the microstrip transmission line 303 comprises a first microstrip transmission line 303a, a second microstrip transmission line 303b, a third microstrip transmission line 303c, a fourth microstrip transmission line 303d and a fifth microstrip transmission line 303e which are connected in sequence; the fourth microstrip transmission line 303d extends in the horizontal direction and is located in the middle of the back surface of the first dielectric slab 301, and the first microstrip transmission line 303a, the second microstrip transmission line 303b, the third microstrip transmission line 303c and the fifth microstrip transmission line 303e all extend in the vertical direction;
the intersection of the fourth microstrip transmission line 303d and the slot transmission line is a feeding point 305; a via hole 304 is formed on the first dielectric plate 301 corresponding to the first microstrip transmission line 303 a.
As shown in fig. 6 and 7, the second feeding balun 4 includes a second dielectric plate 401, and slot transmission lines and microstrip transmission lines 403 printed on the front surface and the back surface of the second dielectric plate 401, respectively;
the slot transmission lines comprise a third slot transmission line 402a and a fourth slot transmission line 402b, the third slot transmission line 402a and the fourth slot transmission line 402b extend along the vertical direction, the third slot transmission line 402a is positioned above the middle part of the front surface of the second dielectric slab 401, and the fourth slot transmission line 402b is positioned below the middle part of the front surface of the second dielectric slab 401;
the microstrip transmission line 403 includes a sixth microstrip transmission line 403a, a seventh microstrip transmission line 403b, an eighth microstrip transmission line 403c, a ninth microstrip transmission line 403d and a tenth microstrip transmission line 403e, which are connected in sequence; the ninth microstrip transmission line 403d extends along the horizontal direction and is located in the middle of the back surface of the second dielectric slab 401, and the sixth microstrip transmission line 403a, the seventh microstrip transmission line 403b, the eighth microstrip transmission line 403c, and the tenth microstrip transmission line 403e all extend along the vertical direction;
the intersection of the ninth microstrip transmission line 403d and the slot transmission line is a feeding point 405; a via hole 404 is formed in the second dielectric plate 401 corresponding to the sixth microstrip transmission line 403 a.
With reference to fig. 4 to 7, an upward-opening slot is formed above the middle portion of the first dielectric plate 301, and a downward-opening slot is formed below the middle portion of the second dielectric plate 401; the first dielectric plate 301 and the second dielectric plate 401 are inserted into each other through the slots, so that the first feeding balun 3 and the second feeding balun 4 are connected in a perpendicular and cross manner with each other.
Furthermore, two plug boards protruding upwards are arranged at the upper end of the first feed balun 3, and two plug boards protruding downwards are arranged at the lower end of the first feed balun 3; the upper end of the second feeding balun 4 is provided with two insertion plates protruding upwards, and the lower end of the second feeding balun 4 is provided with two insertion plates protruding downwards;
four jacks are arranged on the medium top plate 2, and four jacks are arranged on the antenna floor 5;
plug boards at the upper ends of the first feed balun 3 and the second feed balun 4 are respectively inserted into four plug holes of the dielectric top plate 2 so as to realize connection and fixation with the dielectric top plate 2; the plug boards at the lower ends of the first feeding balun 3 and the second feeding balun 4 are respectively inserted into the four plug holes of the antenna floor 5, so as to realize the connection and fixation with the antenna floor 5.
Further, four insertion holes on the dielectric top plate 2 are respectively disposed in the first branch middle portions 101a of the first radiating arm 101, the second radiating arm 102, the third radiating arm 103, and the fourth radiating arm 401. In this embodiment, two insertion plates at the upper end of the first dielectric plate 301 are inserted into insertion holes on the first radiation arm 101 and the third radiation arm 103, respectively, and two insertion plates at the upper end of the second dielectric plate 401 are inserted into insertion holes on the second radiation arm 102 and the fourth radiation arm 104, respectively.
When the embodiment of the invention works, an external feeding cable is connected with the first feeding balun 3 through the hole 304, a current signal is transmitted to the microstrip transmission line 303, coupled to the slot transmission line at the feeding point 305, and transmitted to the first radiation arm 101 and the third radiation arm 103 through the slot transmission line, and finally radiation is realized. Similarly, an external cable is connected to the second feeding balun 4 through the hole 404, and the current signal is transmitted to the microstrip transmission line 403, and at the feeding point 405, the current signal is coupled to the slot transmission line 402, and is transmitted to the second radiation arm 102 and the fourth radiation arm 104 through the slot transmission line, and finally radiation is achieved.
The first radiating arm 101, the second radiating arm 102, the third radiating arm 103 and the fourth radiating arm 104 suppress currents in other frequency bands through a structure equivalent to a series LC circuit by using a working frequency band current, thereby realizing a low scattering characteristic.
Example two
As shown in fig. 8, an embodiment of the present invention provides a multi-frequency antenna array, including the low scattering antenna M1 according to the first embodiment, and further including a first antenna unit O1, a second antenna unit O2, a third antenna unit O3, and a fourth antenna unit O4, which are located at different operating frequency bands from the low scattering antenna M1; the first antenna unit O1, the second antenna unit O2, the third antenna unit O3 and the fourth antenna unit O4 are distributed around the low scattering antenna M1;
in the low scattering antenna M1, the first antenna element O1, the second antenna element O2, the third antenna element O3, and the fourth antenna element O4 are respectively disposed at the positions pointed by the ends of the first radiation arm 101, the second radiation arm 102, the third radiation arm 103, and the fourth radiation arm 104.
In order to verify the low scattering property of the low scattering antenna and the multi-frequency antenna array thereof provided by the present invention, two reference examples are provided below for comparison.
Reference example 1
As shown in fig. 9, the low scattering antenna M1 in the middle is replaced with a fifth antenna element M2 on the basis of the second embodiment. The fifth antenna unit M2 is similar to the low scattering antenna M1 in structure, but each radiating arm on the dielectric top plate 2 is modified to have a structure in which the width of each branch is equal. The structures of the first antenna element O1, the second antenna element O2, the third antenna element O3, and the fourth antenna element O4 are unchanged.
Reference example 2
As shown in fig. 10, the low scattering antenna M1 is directly removed from the second embodiment. The structures of the first antenna element O1, the second antenna element O2, the third antenna element O3, and the fourth antenna element O4 are unchanged.
As shown in fig. 11, when the third antenna element O3 and the fourth antenna element O4 in the second embodiment are fed, the horizontal half-power beam width in the operating frequency band is R1 through simulation. For feeding the third antenna element O3 and the fourth antenna element O4 in the first reference example, the horizontal half-power beam width in the operating frequency band is R2 through simulation. For feeding the third antenna element O3 and the fourth antenna element O4 in the second reference example, the horizontal half-power beam width in the operating frequency band is R3 through simulation.
The comparison result shows that R1 is closer to R3, which indicates that the proposed low scattering antenna M1 of the present invention has less influence on the radiation of the antenna units in other frequency bands, indicating that the proposed low scattering antenna M1 of the present invention has low scattering property.
The invention adopts two branches with different widths in the radiation arm, the branch with larger width can be equivalent to a capacitor, and the branch with smaller width is equivalent to an inductor; therefore, the radiation arm is equivalent to a series LC circuit, so that the radiation arm can pass the current of the working frequency band, but the current of other frequency bands is inhibited, and the low scattering characteristic is realized. Through the structure, the antenna unit has the characteristics of low scattering and easy arrangement, can effectively avoid mutual interference among the antenna units, and has wide application prospect.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A low-scattering antenna is characterized by comprising an antenna main radiator, a dielectric top plate, a first feed balun, a second feed balun and an antenna floor;
the first feeding balun and the second feeding balun are mutually and vertically connected in a cross mode, the upper ends of the first feeding balun and the second feeding balun are connected with the dielectric top plate, and the lower ends of the first feeding balun and the second feeding balun are connected with the antenna floor;
the antenna radiation body is printed on the top surface of the dielectric top plate and comprises a first radiation arm, a second radiation arm, a third radiation arm and a fourth radiation arm; each radiation arm has the same structure and size and consists of at least two branches which are sequentially connected along a straight line, wherein the at least two branches have two different widths, and the widths of every two adjacent branches are different from each other; the ratio of the width between the branch with the smaller width and the branch with the larger width is less than 1:30, the sum of the lengths of all branches in each radiation arm is about one quarter of the wavelength corresponding to the central frequency of the working frequency band of the low-scattering antenna;
the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are sequentially arranged in a circumferential direction by taking the center of the medium top plate as a center, and adjacent radiation arms are mutually vertical and are in a cross shape as a whole; the first radiating arm and the third radiating arm are located on the same straight line to form a half-wave oscillator, and the second radiating arm and the fourth radiating arm are located on the same straight line to form another half-wave oscillator.
2. The low scattering antenna of claim 1, wherein each radiating arm is composed of a first branch, a second branch, a third branch, a fourth branch, and a fifth branch connected in sequence along a straight line, wherein the widths of the second branch and the fourth branch are smaller than the widths of the first branch, the third branch, and the fifth branch.
3. The low scattering antenna of claim 2, wherein the end of the first radiating arm, the second radiating arm, the third radiating arm and the fourth radiating arm where the first branch is located faces the center of the dielectric top plate; the second branch knot, the third branch knot, the fourth branch knot and the fifth branch knot are rectangular, and the first branch knot is in the shape of an isosceles right triangle.
4. The low scattering antenna of claim 3, wherein the second and fourth branches are equal in width, and the first, third, and fifth branches are equal in width.
5. The low scattering antenna of claim 3, wherein the first feeding balun comprises a first dielectric plate, and a slot transmission line and a microstrip transmission line printed on the front surface and the back surface of the first dielectric plate, respectively;
the gap transmission line comprises a first gap transmission line and a second gap transmission line, the first gap transmission line and the second gap transmission line extend along the vertical direction, the first gap transmission line is positioned above the middle part of the front surface of the first dielectric slab, and the second gap transmission line is positioned below the middle part of the front surface of the first dielectric slab;
the microstrip transmission line comprises a first microstrip transmission line, a second microstrip transmission line, a third microstrip transmission line, a fourth microstrip transmission line and a fifth microstrip transmission line which are connected in sequence; the fourth microstrip transmission line extends along the horizontal direction and is positioned in the middle of the back surface of the first dielectric slab, and the first microstrip transmission line, the second microstrip transmission line, the third microstrip transmission line and the fifth microstrip transmission line extend along the vertical direction;
the intersection of the fourth microstrip transmission line and the slot transmission line is a feed point; and a through hole is formed in the first dielectric plate corresponding to the first microstrip transmission line.
6. The low scattering antenna of claim 5, wherein the second feeding balun comprises a second dielectric plate, and a slot transmission line and a microstrip transmission line printed on the front surface and the back surface of the second dielectric plate, respectively;
the gap transmission line comprises a third gap transmission line and a fourth gap transmission line, the third gap transmission line and the fourth gap transmission line extend along the vertical direction, the third gap transmission line is positioned above the middle part of the front surface of the second dielectric slab, and the fourth gap transmission line is positioned below the middle part of the front surface of the second dielectric slab;
the microstrip transmission line comprises a sixth microstrip transmission line, a seventh microstrip transmission line, an eighth microstrip transmission line, a ninth microstrip transmission line and a tenth microstrip transmission line which are connected in sequence; the ninth microstrip transmission line extends along the horizontal direction and is positioned in the middle of the back surface of the second dielectric slab, and the sixth microstrip transmission line, the seventh microstrip transmission line, the eighth microstrip transmission line and the tenth microstrip transmission line extend along the vertical direction;
the intersection of the ninth microstrip transmission line and the slot transmission line is a feed point; and a through hole is formed in the second dielectric plate corresponding to the sixth microstrip transmission line.
7. The low-scattering antenna of claim 6, wherein an upward-opening slot is formed above the middle portion of the first dielectric plate, and a downward-opening slot is formed below the middle portion of the second dielectric plate; the first dielectric plate and the second dielectric plate are mutually inserted through the slots, so that the first feeding balun and the second feeding balun are mutually and vertically connected in a cross mode.
8. The low scattering antenna of claim 6, wherein the first feeding balun has two upward protruding insertion plates at its upper end, and two downward protruding insertion plates at its lower end;
the upper end of the second feed balun is provided with two plug boards protruding upwards, and the lower end of the second feed balun is provided with two plug boards protruding downwards;
the medium top plate is provided with four jacks, and the antenna floor is provided with four jacks;
the plug boards at the upper ends of the first feed balun and the second feed balun are respectively inserted into the four plug holes of the dielectric top plate so as to realize connection and fixation with the dielectric top plate; the plug boards at the lower ends of the first feed balun and the second feed balun are respectively inserted into the four jack holes of the antenna floor so as to realize the connection and fixation with the antenna floor.
9. The low scattering antenna of claim 8, wherein four insertion holes are formed in the dielectric top plate and are respectively disposed in the middle of the first branches of the first, second, third and fourth radiating arms.
10. A multi-frequency antenna array, comprising the low scattering antenna of any of claims 1 to 9, further comprising a first antenna element, a second antenna element, a third antenna element and a fourth antenna element located at different operating frequency bands from the low scattering antenna; the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are distributed around the low-scattering antenna;
and the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit are respectively arranged at the pointed positions of the tail ends of the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm of the low-scattering antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798540.9A CN113506981B (en) | 2021-07-15 | 2021-07-15 | Low-scattering antenna and multi-frequency antenna array thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798540.9A CN113506981B (en) | 2021-07-15 | 2021-07-15 | Low-scattering antenna and multi-frequency antenna array thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113506981A CN113506981A (en) | 2021-10-15 |
| CN113506981B true CN113506981B (en) | 2022-11-01 |
Family
ID=78012826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110798540.9A Active CN113506981B (en) | 2021-07-15 | 2021-07-15 | Low-scattering antenna and multi-frequency antenna array thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113506981B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4430705A1 (en) * | 2021-11-12 | 2024-09-18 | Telefonaktiebolaget LM Ericsson (publ) | Radiator unit for cross-band suppression |
| CN114914680B (en) * | 2022-06-16 | 2024-08-23 | 太仓市同维电子有限公司 | Ultra-wideband miniaturized dual-polarized antenna radiating element |
| CN116191026B (en) * | 2023-02-01 | 2024-02-27 | 广东工业大学 | Multiband dual polarized antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105684217A (en) * | 2013-09-11 | 2016-06-15 | 康普科技有限责任公司 | High-band radiators in moats for basestation antennas |
| CN111180883A (en) * | 2020-02-18 | 2020-05-19 | 摩比天线技术（深圳）有限公司 | Low-frequency antenna assembly with wave-transmitting function and dual-polarized antenna |
| CN112563733A (en) * | 2020-12-09 | 2021-03-26 | 广东通宇通讯股份有限公司 | High-frequency radiation unit and compact dual-band antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9722321B2 (en) * | 2015-02-25 | 2017-08-01 | Commscope Technologies Llc | Full wave dipole array having improved squint performance |
-
2021
- 2021-07-15 CN CN202110798540.9A patent/CN113506981B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105684217A (en) * | 2013-09-11 | 2016-06-15 | 康普科技有限责任公司 | High-band radiators in moats for basestation antennas |
| CN111180883A (en) * | 2020-02-18 | 2020-05-19 | 摩比天线技术（深圳）有限公司 | Low-frequency antenna assembly with wave-transmitting function and dual-polarized antenna |
| CN112563733A (en) * | 2020-12-09 | 2021-03-26 | 广东通宇通讯股份有限公司 | High-frequency radiation unit and compact dual-band antenna |
Non-Patent Citations (3)
| Title |
|---|
| 5G基站天线测量技术研究;权晓栋;《中国优秀硕士学位论文全文数据库(信息科技辑)》;20200215;全文 * |
| Enabling the Co-Existence of Multiband Antenna Arrays;Can Ding 等;《2019 IEEE International Symposium on Phased Array System & Technology (PAST)》;20200305;全文 * |
| Suppression of Cross-Band Scattering in Multiband Antenna Arrays;Hai-Han Sun 等;《IEEE Transactions on Antennas and Propagation》;20190110;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113506981A (en) | 2021-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113506981B (en) | Low-scattering antenna and multi-frequency antenna array thereof | |
| CN110832699B (en) | Dual polarized radiating element and antenna | |
| CN110622351B (en) | Dual polarized radiating element and antenna | |
| KR101857513B1 (en) | Dual-polarized antenna and antenna array | |
| CN103311651B (en) | A kind of ultra wideband multi-band dual polarized antenna | |
| EP3968458B1 (en) | Radiating structure and array antenna | |
| US10749272B2 (en) | Dual-polarized millimeter-wave antenna system applicable to 5G communications and mobile terminal | |
| CN106207495B (en) | Dual-polarized antenna and radiating element thereof | |
| CN110380202B (en) | Low-cost low-profile broadband Massive MIMO antenna unit | |
| CN110808450B (en) | Dual-polarized antenna and radiating element thereof | |
| CN103066376A (en) | Broadband high-isolation dual polarization antenna and radiating unit thereof | |
| CN109980329A (en) | A kind of broadband dual polarized antenna | |
| CN109888477A (en) | Dual-band and dual-polarization mimo antenna system and mobile terminal applied to 5G communication | |
| US20230163466A1 (en) | Antenna Unit and Electronic Device | |
| US20240322445A1 (en) | Low-frequency filtering unit having pattern with high consistency and antenna array | |
| CN112821067A (en) | Low-frequency oscillator unit and antenna | |
| CN2924816Y (en) | Dual-polarization antenna | |
| CN109860980B (en) | Mobile terminal | |
| CN109301459B (en) | multi-frequency array antenna | |
| WO2010018896A1 (en) | Antenna having a decoupling element | |
| CN209544600U (en) | Dual-band and dual-polarization mimo antenna system and mobile terminal applied to 5G communication | |
| CN112106257B (en) | Dual polarized antenna and antenna array | |
| CN115810903A (en) | Antenna radiation unit and antenna | |
| CN213878430U (en) | Low-frequency oscillator unit and antenna | |
| CN113964490B (en) | Broadband dual-polarization electromagnetic transparent antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |