CN115810903A - Antenna radiation unit and antenna - Google Patents
Antenna radiation unit and antenna Download PDFInfo
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- CN115810903A CN115810903A CN202211449812.5A CN202211449812A CN115810903A CN 115810903 A CN115810903 A CN 115810903A CN 202211449812 A CN202211449812 A CN 202211449812A CN 115810903 A CN115810903 A CN 115810903A
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- 230000005855 radiation Effects 0.000 title claims abstract description 123
- 239000000758 substrate Substances 0.000 claims abstract description 133
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 abstract description 3
- 230000010287 polarization Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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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
- H01Q1/36—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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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Abstract
The invention relates to the technical field of communication equipment, and provides an antenna radiation unit and an antenna, wherein the antenna radiation unit comprises: the feed balun comprises a first substrate and a feed structure arranged on the first substrate; the radiating oscillator comprises two oscillator arms, each oscillator arm comprises a second substrate and a radiating arm arranged on the second substrate, and the second substrates of the two oscillator arms are connected to the first substrate and extend to the two sides of the first substrate respectively; the radiation arm is coupled with the feed structure and comprises a connection branch and a plurality of resonant cavities, and the resonant cavities are arranged along the extension direction of the oscillator arm and are connected with one side of the extension direction through the connection branch. The antenna radiation unit can radiate low-frequency signals and simultaneously restrain the interference of high-frequency current, and when the antenna radiation unit is matched with the high-frequency radiation unit to form the multi-frequency array antenna, the influence of the antenna radiation unit on the high-frequency radiation unit can be weakened, and high-frequency gain is improved.
Description
Technical Field
The present invention relates to the field of communications devices, and in particular, to an antenna radiation unit and an antenna.
Background
The radiating element is a main component of the antenna, and is used for directionally receiving and transmitting electromagnetic waves, so that wireless communication is realized. The dual-polarized radiation unit can realize polarization diversity and can work in a transceiving duplex mode, and the number and the occupied space of the antennas are greatly reduced. Considering the problem of operation cost, a multi-frequency array antenna with a mixture of low-frequency radiating elements and high-frequency radiating elements is often used, for example, a mixed array antenna of a 4G antenna and a 5G Massive MIMO antenna. The low-frequency radiating unit of the 4G antenna can couple with the radiation energy of the high-frequency radiating unit of the 5G antenna, so that the beam of the Massive MIMO antenna is deformed, the high-frequency signal is seriously interfered, the coverage range of the high-frequency radiating unit is influenced, and the isolation between high frequency and low frequency is reduced.
In the related art, a band elimination filter is inserted in a low-frequency radiating unit to suppress an induced current generated by a high-frequency electromagnetic wave on the low-frequency radiating unit and reduce the influence of the low-frequency radiating unit on the high-frequency radiating unit. However, since a plurality of independent band-stop filters need to be loaded, the radiation surface of the low-frequency radiation unit is increased, high-frequency signals are shielded, and high-frequency gain is affected.
Disclosure of Invention
The invention provides an antenna radiation unit and an antenna, which are used for solving the problem that in the high-frequency and low-frequency mixed antenna array in the prior art, a low-frequency radiation unit can shield a high-frequency radiation unit and influence high-frequency gain.
The invention provides an antenna radiation unit, comprising:
the feed balun comprises a first substrate and a feed structure arranged on the first substrate;
the radiating oscillator comprises two oscillator arms, wherein each oscillator arm comprises a second substrate and a radiating arm arranged on the second substrate, and the second substrates of the two oscillator arms are connected to the first substrate and respectively extend towards two sides of the first substrate;
the radiation arm is coupled with the feed structure, the radiation arm comprises a connection branch and a plurality of resonant cavities, and the plurality of resonant cavities are arranged along the extension direction of the oscillator arm and are connected through the connection branch on one side of the extension direction.
According to the antenna radiation unit provided by the invention, the second substrate and the resonant cavity are both rectangular, and the adjacent resonant cavity is arranged at a gap.
According to the antenna radiation unit provided by the invention, the first substrate and the second substrate connected with the first substrate are integrally formed.
According to the antenna radiation unit provided by the invention, the feed balun comprises two first substrates which are orthogonal to each other, the two radiation oscillators are orthogonal to each other and are connected with the two first substrates in a one-to-one correspondence manner, and the feed structure is arranged on the two first substrates;
the feed structure comprises a microstrip line structure and a differential structure, the microstrip line structure comprises four first microstrip lines, the four first microstrip lines are in one-to-one corresponding coupling connection with the radiation arms of the four oscillator arms, and the differential structure is respectively arranged on the two first substrates;
the two first microstrip lines connected to one of the radiating oscillators are coupled and connected through the differential structure on one of the first substrates, and the two first microstrip lines connected to the other radiating oscillator are coupled and connected through the differential structure on the other first substrate, so that a dual-polarized radiating unit is formed.
According to the antenna radiation unit provided by the invention, the four oscillator arms are rotationally symmetrical by taking the intersection line of the two first substrates as a center, the four first microstrip lines are respectively positioned in four quadrants formed by the two orthogonal first substrates and are rotationally symmetrical by taking the intersection line of the two first substrates as a center;
the first microstrip line comprises a feed section and a coupling section which are connected with each other, the feed section is arranged on one of the first substrates, and the coupling section is arranged on the other first substrate and is coupled with the corresponding radiation arm;
the first substrate is provided with a first side face and a second side face which are opposite to each other, the differential structure comprises a first differential portion and a second differential portion, the first differential portion is arranged on the first side face, the second differential portion is arranged on the second side face, the first differential portion is coupled with the second differential portion, the feed section on the first side face is connected with the first differential portion, and the feed section on the second side face is connected with the second differential portion.
According to the antenna radiation unit provided by the invention, the first side surface and the second side surface are both provided with the ground layer, the first differential part and the second differential part respectively comprise a plurality of feed blocks, the feed blocks are constructed into a folded structure, the feed blocks are sequentially arranged, adjacent feed blocks are coupled and connected, and the two outermost feed blocks in the feed blocks are respectively connected with the feed section and the ground layer.
According to the antenna radiation unit provided by the invention, the first substrate is provided with a first side surface and a second side surface which are opposite, and the feed structure comprises a micro-strip line structure and a differential structure;
the differential structure comprises a first differential portion and a second differential portion, the first differential portion is arranged on the first side face, the second differential portion is arranged on the second side face, and the first differential portion and the second differential portion are in coupling connection;
the microstrip line structure comprises two microstrip lines respectively arranged on the first side surface and the second side surface, one ends of the two microstrip lines are respectively connected with the first differential part and the second differential part, and the other ends of the two microstrip lines are respectively coupled with the two radiation arms of the radiation oscillator.
The invention also provides an antenna comprising at least one antenna radiation unit.
According to the present invention, there is provided an antenna, further comprising:
the antenna comprises at least one high-frequency radiation unit, wherein the high-frequency radiation unit is distributed on the peripheral side of the antenna radiation unit.
According to an antenna provided by the present invention, further comprising:
the high-frequency radiation unit and the antenna radiation unit are arranged on the reflecting plate, and the second substrate is perpendicular to the reflecting surface of the reflecting plate.
According to the antenna radiation unit and the antenna provided by the invention, the plurality of resonant cavities are arranged on the oscillator arm and are connected through the connecting branches to form the radiation arm. The radiation arm not only can conduct the low-frequency current of the feed structure on the feed balun, but also can effectively inhibit high-frequency current interference, and when the antenna radiation unit is matched with the high-frequency radiation unit to form the multi-frequency array antenna, the influence of the antenna radiation unit on the high-frequency radiation unit can be weakened, and high-frequency gain is improved. And the plurality of resonant cavities are arranged along the length direction of the oscillator arm, so that the discontinuity of the oscillator arm is reduced and the radiation surface is reduced while the radiation arm filters high-frequency signals, thereby reducing the shielding of the high-frequency signals and being beneficial to improving the high-frequency gain of the high-frequency radiation unit.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an antenna radiation unit provided by the present invention;
fig. 2 is a schematic view of a connection structure between a first substrate and a first radiating element in an antenna radiating unit provided by the present invention;
FIG. 3 is a rear view of the feed balun and dipole arm connection structure of FIG. 2;
fig. 4 is a schematic view of a connection structure between another first substrate and a second radiating element in the antenna radiating element provided by the present invention;
FIG. 5 is a rear view of the feed balun and dipole arm connection structure of FIG. 4;
fig. 6 is a schematic structural diagram of an antenna provided by the present invention;
reference numerals:
100. an antenna radiation unit; 1. a feed balun; 11. a first substrate; 111. a first slot; 112. a second slot; 11a, a first side; 11b, a second side; 12. a feed structure; 121. a microstrip line structure; 1211. a first microstrip line; 12111. a feed section; 12112. a coupling section; 1212. a second microstrip line; 122. a differential structure; 122a, a first difference section; 122b, a second difference portion; 1221. a feeding block; 13. a ground plane; 2. a radiating oscillator; 2a, a first radiating oscillator; 2b, a second radiating element; 20. a vibrator arm; 21. a second substrate; 22. a radiation arm; 221. connecting branch knots; 221a, a first connecting branch knot; 221b, a second connecting branch knot; 222. a resonant cavity; 3. a base; 200. a high-frequency radiation unit; 300. a reflective plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity and are not intended to represent any substantial differences, unless otherwise explicitly specified or limited. The directions of "up", "down", "left" and "right" are all based on the directions shown in the attached drawings. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The antenna radiating element and antenna of the present invention are described below in conjunction with fig. 1-6.
As shown in fig. 1, the antenna radiation unit 100 of the present invention includes a feeding balun 1 and a radiation element 2. The feeding balun 1 includes a first substrate 11 and a feeding structure 12 provided on the first substrate 11. The radiating element 2 includes two element arms 20, and the element arm 20 includes a second substrate 21 and a radiating arm 22 provided on the second substrate 21. The second base plates 21 of the two vibrator arms 20 are connected to the first base plate 11 and extend to both sides of the first base plate 11, respectively. The radiation arm 22 is coupled to the feed structure 12, the radiation arm 22 includes a connection branch 221 and a plurality of resonant cavities 222, and the plurality of resonant cavities 222 are arranged along the extending direction of the dipole arm 20 and connected to one side of the extending direction through the connection branch 221.
It is understood that the extending direction of the second substrate 21 is the length direction of the vibrator arm 20. The second substrates 21 of the two oscillator arms 20 are coplanar and extend in opposite directions to form one radiating oscillator 2.
Wherein, one end of the feed structure 12 is used for connecting a feed network, and the two radiation arms 22 of the radiation oscillator 2 are respectively coupled with the other end of the feed structure 12 to realize the coupling feed of the radiation oscillator 2. The cavity 222 and the connecting branches 221 are copper layers disposed on the second substrate 21. The resonant cavity 222 of the radiating arm 22 is coupled to the feed structure 12.
Referring to fig. 1-3, for the same radiating arm 22, the connecting branches 221 include a first connecting branch 221a and a second connecting branch 221b. The first connecting branch 221a is located at one side of the plurality of resonant cavities 222 and extends along the arrangement direction of the plurality of resonant cavities 222, and one side of each resonant cavity 222 is connected to the first connecting branch 221a through the second connecting branch 221b.
In the antenna radiation unit 100 according to the embodiment of the present invention, the plurality of resonant cavities 222 are disposed on the dipole arm 20, and the plurality of resonant cavities 222 are connected by the connection branch 221 to form the radiation arm 22. Referring to fig. 6, when the antenna radiation unit 100 and the high-frequency radiation unit 200 form a multi-frequency array antenna, the radiation arm 22 not only can conduct the low-frequency current of the feed structure 12 on the feed balun 1, but also can effectively suppress the interference of the high-frequency current, reduce the influence of the antenna radiation unit 100 on the high-frequency radiation unit 200, and improve the high-frequency gain. Moreover, the plurality of resonant cavities 222 are arranged along the length direction of the oscillator arm 20, so that the discontinuity of the oscillator arm 20 is reduced and the radiation surface is reduced while the radiation arm 22 filters high-frequency signals, thereby reducing the shielding of the high-frequency signals and being beneficial to improving the high-frequency gain of the high-frequency radiation unit 200.
Alternatively, the second substrate 21 and the resonant cavity 222 are rectangular, and the adjacent resonant cavities 222 are arranged with a gap. It will be appreciated that, referring to fig. 1-5, the second substrate 21 is an elongated rectangular structure, and the rectangular resonant cavities 222 can be disposed adjacent to one side edge and an end edge of the second substrate 21 in the extending direction, and the gap between adjacent resonant cavities 222 is minimized. Thus, on the premise of meeting the requirement of the arrangement space of the connecting branch 221, the space of the second substrate 21 can be utilized to the greatest extent, so that the length of the vibrator arm 20 is reduced, the shielding of the vibrator arm 20 to high-frequency signals is reduced, and the high-frequency gain is favorably improved.
Alternatively, the orientation shown in fig. 2 is taken as an example, the first substrate 11 is disposed in a vertical direction, and the second substrate 21 is connected to the top of the first substrate 11 and extends to the left and right sides of the first substrate 11. A plurality of resonators 222 are disposed near the top side edge of second substrate 21 and are tiled from one end of second substrate 21 to the other with only a small gap remaining between each other. The connecting branches 221 are disposed below the plurality of resonant cavities 222 and near the bottom side edge of the second substrate 21. In this way, the space of the second substrate 21 can be utilized to a great extent, reducing the length and discontinuity of the vibrator arm 20.
In some embodiments of the present invention, the first substrate 11 and the second substrate 21 connected thereto are integrally formed. Alternatively, the first substrate 11 and the second substrate 21 are an integral PCB substrate, and the feed structure 12 and the radiating arm 22 are copper layers disposed on the same PCB substrate. This may simplify the manufacturing and assembly process of the radiating element.
As shown in fig. 6, when an antenna array is formed by using the antenna radiation unit 100 and the high-frequency radiation unit 200, the antenna radiation unit 100 and the high-frequency radiation unit 200 are mounted on the reflection plate 300, and the antenna radiation unit 100 radiates a low-frequency signal and the high-frequency radiation unit 200 radiates a high-frequency signal. The first substrate 11 is disposed perpendicular to the reflection plate 300 such that the second substrate 21 is perpendicular to the reflection surface, which can reduce the shielding of the oscillator arm 20 from high frequency signals, and is advantageous for improving high frequency gain.
The antenna radiation unit provided by the invention can be a single-polarization radiation unit or a dual-polarization radiation unit.
When the antenna radiation unit is a dual-polarized radiation unit, the feed balun 1 includes two first substrates 11 orthogonal to each other, and the two radiation oscillators 2 are orthogonal to each other and connected to the two first substrates 11 in a one-to-one correspondence. The feeding structures 12 are provided on the two first substrates 11.
Specifically, the two radiation oscillators 2 are a first radiation oscillator 2a and a second radiation oscillator 2b, the two oscillator arms 20 of the first radiation oscillator 2a are connected to two sides of one of the first substrates 11 respectively and extend in a direction away from the first substrate 11, and the two oscillator arms 20 of the second radiation oscillator 2b are connected to two sides of the other first substrate 11 respectively and extend in a direction away from the first substrate 11.
Optionally, referring to fig. 2, a first slot 111 is formed at a top end of one of the first substrates 11; referring to fig. 5, a second insertion groove 112 is formed at a bottom end of the other first substrate 11. The two first substrates 11 are vertically inserted into each other through the first slot 111 and the second slot 112.
Wherein the feeding structure 12 is disposed on a structure formed by two first substrates 11 orthogonally. Specifically, the feed structure 12 includes a microstrip line structure 121 and a differential structure 122. The microstrip line structure 121 includes four first microstrip lines 1211, and the four first microstrip lines 1211 are coupled to the radiation arms 22 of the four oscillator arms 20 in a one-to-one correspondence manner.
The two first substrates 11 are respectively provided with a differential structure 122. The two first microstrip lines 1211 connected to one of the radiating oscillators 2 are coupled and connected through the differential structure 122 on one of the first substrates 11, and the two first microstrip lines 1211 connected to the other radiating oscillator 2 are coupled and connected through the differential structure 122 on the other first substrate 11, so as to form a dual-polarized radiating unit.
Two of the four first microstrip lines 1211 are coupled and connected through a differential structure 122 on the first substrate 11, and are respectively used for feeding the two radiating arms 22 of the first radiating oscillator 2 a; the other two first microstrip lines 1211 are coupled and connected through the differential structure 122 on the other first substrate 11, and are respectively used for feeding the two radiating arms 22 of the second radiating oscillator 2b. The two radiating oscillators 2 are respectively used for radiating low-frequency signals in two polarization directions, and the low-frequency signals in the two polarization directions are in an orthogonal state, so that the dual-polarization radiation function of the antenna radiation unit 100 is realized.
It is understood that two first microstrip lines 1211 for feeding the two diagonal radiation arms 22 are respectively connected to two ends of a differential structure 122, and the differential structure 122 can generate a 180 ° phase difference between the currents input to one of the radiation arms 22, so that the directions of the currents on the two radiation arms 22 are the same. In the embodiment of the present invention, the feed structure 12 with the differential structure 122 feeds the radiating element 2, so that the polarization purity of the antenna can be improved, and the cross polarization ratio of the antenna can be improved.
Further, as shown in fig. 1, the four oscillator arms 20 are rotationally symmetric around the intersection line of the two first substrates 11, and the four first microstrip lines 1211 are respectively located in four quadrants orthogonally formed by the two first substrates 11 and are rotationally symmetric around the intersection line of the two first substrates 11. The first microstrip line 1211 includes a feeding section 12111 and a coupling section 12112 connected to each other, the feeding section 12111 is disposed on one of the first substrates 11, and the coupling section 12112 is disposed on the other first substrate 11 and coupled to the corresponding radiating arm 22.
It will be appreciated that the radiating arms 22 on the four dipole arms 20 are located on the same side of the corresponding second substrate 21. Each quadrant is provided with a first microstrip line 1211, and the feeding section 12111 of the same first microstrip line 1211 is disposed on a side of one of the first substrates 11, and the coupling section 12112 is disposed on a side of the other first substrate 11. That is, referring to fig. 2 to 5, the first side 11a and the second side 11b of each first substrate 11 are provided with a feeding section 12111 of one first microstrip line 1211 and a coupling section 12112 of another first microstrip line 1211.
The first microstrip lines 1211 in the four quadrants are coupled and connected to the four radiating arms 22 in a one-to-one correspondence manner. Specifically, the feed section 12111 has a vertical section extending in the height direction of the first substrate 11 (perpendicular to the extending direction of the second substrate 21), and the coupling section 12112 is connected to the top of the vertical section and extends in the extending direction of the second substrate 21 to be coupled to the resonant cavity 222.
The first substrate 11 has a first side 11a and a second side 11b opposite to each other. The differential structure 122 includes a first differential portion 122a and a second differential portion 122b, the first differential portion 122a is disposed on the first side surface 11a, the second differential portion 122b is disposed on the second side surface 11b, and the first differential portion 122a and the second differential portion 122b are coupled. The feed section 12111 on the first side 11a is connected to the first differential portion 122a, and the feed section 12111 on the second side 11b is connected to the second differential portion 122b.
The ground layer 13 is provided on both the first side surface 11a and the second side surface 11b. The ground layer 13 on the first side 11a is disposed corresponding to the feeding structure 12 on the second side 11b, and the ground layer 13 on the second side 11b is disposed corresponding to the feeding structure 12 on the first side 11 a. As shown in fig. 2 and 3, in the case where the first substrate 11 and the second substrate 21 are integrally molded, the ground layer 13 is laid to a region where the microstrip line structure 121 is coupled to the radiation arm 22.
Specifically, the first differential portion 122a and the second differential portion 122b are disposed on the back of the first substrate 11, and realize coupling connection. The first differential portion 122a and the second differential portion 122b are respectively provided extending in the height direction of the first substrate 11. The bottom end of the feed section 12111 on the first side 11a is connected to the bottom end of the first differential portion 122a, and the top end of the first differential portion 122a is connected to the ground layer 13 on the first side 11 a. The bottom end of the feed section 12111 on the second side surface 11b is connected to the top end of the second differential portion 122b, and the bottom end of the second differential portion 122b is connected to the ground layer 13 on the second side surface 11b.
The feeding section 12111 and the first differential portion 122a on the first side 11a of each first substrate 11 are located on both sides of the other first substrate 11, respectively. The feed section 12111 and the second differential portion 122b on the second side 11b of each first substrate 11 are located on the same side of the other first substrate 11.
Referring to fig. 2 and 4, the microstrip line structure 121 further includes a second microstrip line 1212. The first side surfaces 11a of the two first substrates 11 are both provided with a second microstrip line 1212, the feed section 11a and the first differential portion 122a on the first side surfaces 11a are respectively connected with one end of the second microstrip line 1212, and the other end of the second microstrip line 1212 is used for being connected with a feed network.
When the antenna radiation element is a single-polarization radiation element, the feed balun 1 includes a first substrate 11, and the first substrate 11 has a first side surface 11a and a second side surface 11b that are opposite to each other. The feed structure 12 includes a microstrip line structure 121 and a differential structure 122. The differential structure 122 includes a first differential portion 122a and a second differential portion 122b, the first differential portion 122a is disposed on the first side surface 11a, the second differential portion 122b is disposed on the second side surface 11b, and the first differential portion 122a and the second differential portion 111b are coupled. The microstrip line structure 121 includes two microstrip lines respectively disposed on the first side surface 11a and the second side surface 11b, one end of each of the two microstrip lines is respectively connected to the first differential portion 122a and the second differential portion 122b, and the other end of each of the two microstrip lines is respectively coupled to the two radiation arms 22 of the radiation oscillator 2.
It can be understood that, different from the dual-polarized radiation unit structure described above, the single-polarized radiation unit provided in this embodiment is based on the structures shown in fig. 2 and fig. 3, no slot is provided on the first substrate 11, the feeding section 12111 and the coupling section 12112 on the first side 11a are connected to form a microstrip line, and the feeding section 12111 and the coupling section 12112 on the second side 11b are connected to form another microstrip line. One end of each of the two microstrip lines is connected to the first differential portion 122a and the second differential portion 122b, respectively, so as to realize the coupling connection of the two microstrip lines. The microstrip line on the first side 11a and the first differential portion 122a are respectively connected to one end of a second microstrip line 1212, and the other end of the second microstrip line 1212 is used for being connected to a feed network.
In some embodiments of the present invention, each of the first and second differential portions 122a and 122b includes a plurality of feeding blocks 1221, and the feeding blocks 1221 are configured in a zigzag structure. The plurality of feeding blocks 1221 are sequentially arranged, and adjacent feeding blocks 1221 are coupled and connected. The outermost two feed blocks 1221 of the plurality of feed blocks 1221 are connected to the feed section 12111 and the ground layer 13, respectively.
It is understood that the plurality of feeding blocks 1221 are sequentially spaced apart and arranged along the length of the feeding section 12111. Referring to fig. 2 and 4, the lowest end feed block 1221 of the first side 11a is connected to the feed section 12111, and the topmost feed block 1221 is connected to the ground layer 13. Referring to fig. 3 and 5, the topmost feed block 1221 of the second side surface 11b is connected to the feed section 12111, and the bottommost feed block 1221 is connected to the ground layer 13.
The folded feed block 1221 can increase the current flowing path, and implement a differential function by a path difference. Alternatively, the feeding blocks 1221 are constructed in a "z" shape as shown in fig. 2, and four "z" shaped feeding blocks 1221 are sequentially buckled and distributed in a twisted and staggered manner.
Some embodiments of the present invention provide the antenna radiation unit 100 further including a base 3, and the ground layer 13 on the first side surface 11a and the second side surface 11b is grounded through the base 3. Optionally, a third microstrip line is disposed on the base 3, the second microstrip line 1212 on the feeding balun 1 is connected to one end of the third microstrip line, and the other end of the third microstrip line is connected to the coaxial line. Alternatively, the second microstrip line 1212 is directly connected to the coaxial line.
Wherein, the base 3 can also be a PCB structure. Under the condition that the first substrate 11 and the second substrate 21 connected with the first substrate are integrally formed, the single-polarized antenna radiation unit 100 only needs to be provided with two PCB plates, and the dual-polarized antenna radiation unit 100 only needs to be provided with three PCB plates, so that the structure is simple, and the assembly is convenient.
In addition, the embodiment of the present invention further provides an antenna, which includes at least one antenna radiation unit 100 as described in the above embodiment. A plurality of antenna radiating elements 100 are arranged in an array. Further, the antenna further includes a reflection plate 300, and the antenna radiation unit 100 is disposed on the reflection plate 300.
As shown in fig. 6, in some embodiments of the present invention, the antenna further includes at least one high-frequency radiating element 200, and the high-frequency radiating element 200 is distributed on the periphery of the antenna radiating element 100. Wherein, a plurality of high frequency radiating elements 200 are distributed around each antenna radiating element 100, and the plurality of high frequency radiating elements 200 are arranged in a matrix. The resonant cavity 222 can conduct the low-frequency current in the feed structure 12 and filter the high-frequency electromagnetic wave radiated by the high-frequency radiation unit 200, thereby reducing the RCS (radar cross section) value of the antenna radiation unit 100 in the high-frequency band of the high-frequency radiation unit 200, and achieving the purpose of stealth.
Further, the high-frequency radiation unit 200 and the antenna radiation unit 100 are disposed on the reflection plate 300, and the second substrate 21 is perpendicular to the reflection surface of the reflection plate 300. This reduces the shielding of the oscillator arm 20 from the high-frequency signal radiated from the high-frequency radiation unit 200, thereby improving the high-frequency gain.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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 technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An antenna radiating element, comprising:
the feed balun comprises a first substrate and a feed structure arranged on the first substrate;
the radiating oscillator comprises two oscillator arms, wherein each oscillator arm comprises a second substrate and a radiating arm arranged on the second substrate, and the second substrates of the two oscillator arms are connected to the first substrate and respectively extend towards two sides of the first substrate;
the radiation arm is coupled with the feed structure, the radiation arm comprises a connection branch and a plurality of resonant cavities, and the plurality of resonant cavities are arranged along the extension direction of the oscillator arm and are connected through the connection branch on one side of the extension direction.
2. The antenna radiating element of claim 1, wherein the second substrate and the resonant cavity are both rectangular and are disposed adjacent to the resonant cavity gap.
3. The antenna radiating element of claim 1, wherein the first substrate is integrally formed with the second substrate to which it is attached.
4. The antenna radiating element of claim 1, wherein the feeding balun includes two first substrates orthogonal to each other, two radiating elements orthogonal to each other and connected to the two first substrates in a one-to-one correspondence, and the feeding structure is disposed on the two first substrates;
the feed structure comprises a microstrip line structure and differential structures, the microstrip line structure comprises four first microstrip lines, the four first microstrip lines are in one-to-one corresponding coupling connection with the radiation arms of the four oscillator arms, and the differential structures are respectively arranged on the two first substrates;
the two first microstrip lines connected to one of the radiating oscillators are coupled and connected through the differential structure on one of the first substrates, and the two first microstrip lines connected to the other radiating oscillator are coupled and connected through the differential structure on the other first substrate, so that a dual-polarized radiating unit is formed.
5. The antenna radiation unit according to claim 4, wherein the four dipole arms are rotationally symmetric around an intersection line of the two first substrates, and the four first microstrip lines are respectively located in four quadrants orthogonally formed by the two first substrates and are rotationally symmetric around an intersection line of the two first substrates;
the first microstrip line comprises a feed section and a coupling section which are connected with each other, the feed section is arranged on one of the first substrates, and the coupling section is arranged on the other first substrate and is coupled with the corresponding radiation arm;
the first substrate is provided with a first side face and a second side face which are opposite to each other, the differential structure comprises a first differential portion and a second differential portion, the first differential portion is arranged on the first side face, the second differential portion is arranged on the second side face, the first differential portion is coupled with the second differential portion, the feed section on the first side face is connected with the first differential portion, and the feed section on the second side face is connected with the second differential portion.
6. The antenna radiating element of claim 5, wherein a ground layer is disposed on each of the first side surface and the second side surface, each of the first differential portion and the second differential portion includes a plurality of feeding blocks, the feeding blocks are configured in a zigzag structure, the feeding blocks are sequentially arranged and coupled to adjacent feeding blocks, and two outermost feeding blocks of the feeding blocks are respectively connected to the feeding sections and the ground layer.
7. The antenna radiating element of claim 1, wherein the first substrate has first and second opposing sides, and the feed structure comprises a microstrip line structure and a differential structure;
the differential structure comprises a first differential part and a second differential part, the first differential part is arranged on the first side surface, the second differential part is arranged on the second side surface, and the first differential part and the second differential part are coupled and connected;
the microstrip line structure comprises two microstrip lines respectively arranged on the first side surface and the second side surface, one ends of the two microstrip lines are respectively connected with the first differential part and the second differential part, and the other ends of the two microstrip lines are respectively coupled with the two radiation arms of the radiation oscillator.
8. An antenna characterized in that it comprises at least one antenna radiating element according to any of claims 1-7.
9. The antenna of claim 8, further comprising:
at least one high-frequency radiation unit, high-frequency radiation unit distributes in the week side of antenna radiation unit.
10. The antenna of claim 9, further comprising:
the high-frequency radiation unit and the antenna radiation unit are arranged on the reflecting plate, and the second substrate is perpendicular to the reflecting surface of the reflecting plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449812.5A CN115810903A (en) | 2022-11-18 | 2022-11-18 | Antenna radiation unit and antenna |
| PCT/CN2023/127116 WO2024104087A1 (en) | 2022-11-18 | 2023-10-27 | Antenna radiation unit and antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449812.5A CN115810903A (en) | 2022-11-18 | 2022-11-18 | Antenna radiation unit and antenna |
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| Publication Number | Publication Date |
|---|---|
| CN115810903A true CN115810903A (en) | 2023-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211449812.5A Pending CN115810903A (en) | 2022-11-18 | 2022-11-18 | Antenna radiation unit and antenna |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115810903A (en) |
| WO (1) | WO2024104087A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024104087A1 (en) * | 2022-11-18 | 2024-05-23 | 中信科移动通信技术股份有限公司 | Antenna radiation unit and antenna |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107123851B (en) * | 2017-04-01 | 2020-02-21 | 厦门致联科技有限公司 | Fitting room RFID system reader-writer antenna based on miniaturization technology |
| CN206685537U (en) * | 2017-04-01 | 2017-11-28 | 华侨大学 | A kind of high-gain reading and writing device antenna of fitting room RFID system |
| CN112216972A (en) * | 2020-10-16 | 2021-01-12 | 摩比天线技术（深圳）有限公司 | Low-frequency radiation unit and base station antenna |
| CN113178685B (en) * | 2020-12-31 | 2022-07-26 | 京信通信技术(广州)有限公司 | Radiating element, antenna and base station |
| KR102479980B1 (en) * | 2021-04-19 | 2022-12-22 | 주식회사 에이스테크놀로지 | Low-Band Radiator and Wideband Multi Antennas including the same |
| CN113964506A (en) * | 2021-09-17 | 2022-01-21 | 华南理工大学 | Dual-polarized electromagnetic stealth antenna for pilot frequency decoupling |
| CN115810903A (en) * | 2022-11-18 | 2023-03-17 | 中信科移动通信技术股份有限公司 | Antenna radiation unit and antenna |
-
2022
- 2022-11-18 CN CN202211449812.5A patent/CN115810903A/en active Pending
-
2023
- 2023-10-27 WO PCT/CN2023/127116 patent/WO2024104087A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024104087A1 (en) * | 2022-11-18 | 2024-05-23 | 中信科移动通信技术股份有限公司 | Antenna radiation unit and antenna |
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| Publication number | Publication date |
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| WO2024104087A1 (en) | 2024-05-23 |
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