CN117239406A - Broadband antenna radiation device - Google Patents
Broadband antenna radiation device Download PDFInfo
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- CN117239406A CN117239406A CN202311441218.6A CN202311441218A CN117239406A CN 117239406 A CN117239406 A CN 117239406A CN 202311441218 A CN202311441218 A CN 202311441218A CN 117239406 A CN117239406 A CN 117239406A
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- radiation
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- feed lines
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- 230000005855 radiation Effects 0.000 title claims abstract description 103
- 239000004020 conductor Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
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Abstract
The invention provides a broadband antenna radiation device which comprises a reflecting plate, a radiation device, a balun device and a fixed plastic piece, wherein the fixed plastic piece is fixed above the reflecting plate; the radiation device comprises two pairs of dual-polarized radiation surfaces arranged on the front surface and the back surface of the dielectric plate; the balun device comprises a balun and two pairs of feed lines arranged on the front side and the back side of the balun, one ends of the two pairs of feed lines are respectively connected with the two pairs of radiation surfaces, and the other ends of the two pairs of feed lines are connected with the coaxial cable; the two pairs of feed lines comprise two front feed lines arranged on the front side of the balun and two back feed lines arranged on the back side of the balun, wherein one front feed line and one back feed line form a pair of feed microstrip lines, and the front feed lines are lines with stepped gradual change structures. The invention has wider bandwidth, can filter corresponding frequency bands, adopts simplified balun design, and reduces cost.
Description
Technical Field
The invention relates to the technical field of communication antennas, in particular to a broadband antenna radiation device.
Background
With the high-speed development of mobile communication, the working frequency of a communication system is higher, the communication bandwidth is wider, and the weight and the processing precision of an antenna for communication are higher. The dual polarized antenna is widely applied in the field of mobile communication, and the PCB dual polarized radiation antenna is widely applied in the fields of base station antennas and the like because the dual polarized antenna can realize a planar structure with any shape and has the advantages of wide bandwidth, light weight, high processing precision and the like.
For antenna elements operating in a multiple antenna array system, in addition to their own performance, their impact on other antennas is considered. 2022, jingxin corporation provided a radiation device, antenna and communication equipment, operating in the frequency band of 1.88-2.02GHz. The radiation device in the above technology has some disadvantages, for example, the bandwidth is insufficient relative to the communication frequency band 1.7-2.8GHz of the communication system, and the corresponding frequency band cannot be filtered, so that the application requirements of the engineering broadband and multi-frequency antenna cannot be met. In addition, the conventional antenna generally adopts two groups of balun circuits to control the dual-polarized oscillator surface, and the manufacturing and assembly costs are high.
Disclosure of Invention
The invention aims to provide a broadband antenna radiation device which overcomes the defects in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows: the broadband antenna radiation device comprises a reflecting plate, a radiation device, a balun device, a fixed plastic piece and a coaxial cable, wherein the fixed plastic piece is fixed above the reflecting plate, the radiation device is fixed above the fixed plastic piece, and the balun device is inserted into the fixed plastic piece and is connected with the radiation device; the radiation device comprises a dielectric plate and two pairs of radiation surfaces arranged on the front side and the back side of the dielectric plate, wherein the two pairs of radiation surfaces are dual-polarized radiation surfaces; the balun device comprises a balun and two pairs of feed lines arranged on the front side and the back side of the balun, one ends of the two pairs of feed lines are respectively connected with the two pairs of radiation surfaces, and the other ends of the two pairs of feed lines are connected with a coaxial cable arranged below the reflecting plate; the two pairs of feed lines comprise two front feed lines arranged on the front side of the balun and two back feed lines arranged on the back side of the balun, wherein one front feed line and one back feed line which are correspondingly arranged form a pair of feed microstrip lines, and the front feed lines are lines with stepped gradual change structures.
Furthermore, in the broadband antenna radiating device, the two pairs of feed lines are parallel double lines, and a metal strip line is arranged between the two front feed lines.
Further, in the broadband antenna radiation device, the reflecting plate is provided with a slit hole which is arranged corresponding to the balun, and the lower end of the balun passes through the slit hole to be connected with the coaxial cable; the coaxial cable comprises an inner conductor and an outer conductor, wherein the inner conductor passes through the via hole to be connected with the front feed circuit, and the outer conductor is connected with the back feed circuit.
Further, in the broadband antenna radiation device, the two pairs of radiation surfaces are dual polarized radiation surfaces with the angle of +/-45 degrees, the dual polarized radiation device comprises a radiation surface I, a radiation surface II, a radiation surface III and a radiation surface IV, wherein the radiation surface I and the radiation surface II are arranged on the front surface of the dielectric plate, the radiation surface III and the radiation surface IV are arranged on the back surface of the dielectric plate, the pair of radiation surfaces is formed by the pair of the radiation surface I and the pair of the radiation surface IV, and the pair of the radiation surfaces is formed by the pair of the radiation surface II and the pair of the radiation surface III.
Furthermore, in the broadband antenna radiation device, the first radiation surface, the second radiation surface, the third radiation surface and the fourth radiation surface have the same structure and comprise two groups of etching slot structures which are oppositely arranged.
Further, the broadband antenna radiating device is manufactured by PCB processing or metal processing.
Further, in the broadband antenna radiation device, at least two through holes are formed in the dielectric plate, the through holes are formed in the center positions of the two groups of etching grooving structures, and the top of the fixed plastic part is provided with a clamping piece which is clamped with the through holes.
Furthermore, in the broadband antenna radiation device, a plurality of support plates are arranged at the bottom of the fixed plastic part, and the fixed plastic part is connected with the reflecting plate through the support plates.
Compared with the prior art, the invention has the beneficial effects that:
1. the simplified balun design is adopted, two groups of balun circuits with conventional design are integrated on a single balun, and the polarized radiation surfaces with the angles of +/-45 degrees are controlled respectively, so that the assembly and manufacturing cost of the antenna are reduced;
2. the radiation surface is etched with a slotting structure, the current flowing directions of the two sides of the slotting are opposite, the generated currents are mutually counteracted, electromagnetic radiation of a corresponding frequency band is filtered, and the radiation characteristic of the frequency band is improved;
3. the ladder gradual change feed line structure is adopted, so that the impedance matching bandwidth is increased, and the broadband is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 is a schematic diagram of a broadband antenna radiation device according to the present invention;
fig. 2 is a schematic diagram of a wideband antenna radiation device according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of the front and back mirror images of a radiation device of the wideband antenna radiation device of the present invention;
fig. 4 is a schematic diagram of the front and back sides of a balun of a wideband antenna radiation device of the present invention;
FIG. 5 is a graph of standing waves of a wideband antenna radiation apparatus of the present invention;
in the figure: 1. a reflection plate; 2. a radiation device; 21. a dielectric plate; 22. a first radiation surface; 23. a second radiation surface; 24. a third radiation surface; 25. a radiation surface IV; 26. a through hole;
3. balun device; 31. balun (B); 32. a front side feeder circuit; 33. a reverse side feed line;
4. fixing the plastic piece; 41. a clip; 42. a support plate;
5. a coaxial cable.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 to 4, a broadband antenna radiation device comprises a reflecting plate 1, a radiation device 2, a balun device 3, a fixed plastic piece 4 and a coaxial cable 5, wherein the fixed plastic piece 4 is fixed above the reflecting plate 1, the radiation device 2 is fixed above the fixed plastic piece 4, and the balun device 3 is inserted into the fixed plastic piece 4 and is connected with the radiation device 2.
As shown in fig. 1 and 3, the radiation device 2 includes a dielectric plate 21 and two pairs of radiation surfaces disposed on front and back sides of the dielectric plate 21, where the two pairs of radiation surfaces are dual polarized radiation surfaces, or may be conventional dipole radiation surfaces, or folded dipole radiation surfaces, or may be other forms, which are not limited herein specifically; specifically, the two pairs of dual polarized radiating surfaces with the radiating surfaces of ±45° comprise a first radiating surface 22, a second radiating surface 23, a third radiating surface 24 and a fourth radiating surface 25, wherein the first radiating surface 22 and the second radiating surface 23 are arranged on the front surface of the dielectric plate 21, the third radiating surface 24 and the fourth radiating surface 25 are arranged on the back surface of the dielectric plate 21, the opposite angles of the first radiating surface 22 and the fourth radiating surface 25 are set as a pair of radiating surfaces, the opposite angles of the second radiating surface 23 and the third radiating surface 24 are set as a pair of radiating surfaces, the two radiating surfaces on each opposite angle form a pair of polarized dipole radiating surfaces, and the cross of ±45° polarization intersection is realized through a cross line in the radiating device, so that two pairs of dipole radiating surfaces can be formed.
As shown in fig. 1, 2 and 4, the balun device 3 includes a balun 31 and two pairs of feeding lines disposed on front and back sides of the balun 31, the two pairs of feeding lines are integrated on the balun 31, so as to simplify the balun design, one ends of the two pairs of feeding lines are respectively connected with two pairs of radiation surfaces, and the other ends of the two pairs of feeding lines are connected with a coaxial cable 5 disposed below the reflecting plate 1; the two pairs of feed lines comprise two front feed lines 32 arranged on the front side of the balun 31 and two back feed lines 33 arranged on the back side of the balun 31, wherein one front feed line 32 and one back feed line 33 which are correspondingly arranged form a pair of feed microstrip lines, and the pair of feed microstrip lines are connected with a pair of radiation surfaces and respectively control +/-45 DEG polarized radiation surfaces; the front surface of the balun 31 is a signal surface, and the back surface is a ground surface. In addition, the front feed line 32 is a line with a stepped and gradual structure, which can increase the impedance matching bandwidth and realize broadband.
Specifically, one ends of two pairs of feed lines on the balun device 3 are respectively electrically connected with two pairs of polarized radiation surfaces of the radiation device 2, that is, one pair of feed lines is connected with one pair of polarized radiation surfaces, so as to realize the feeding of the balun device 3 to the radiation device 2 and the connection of the ground wire of the radiation device 2 with the balun device 3. The bottom of the balun device 3 passes through the reflecting plate and is electrically connected with the coaxial cable 5 through the other ends of the two pairs of feed lines so as to realize the feeding of the balun device 3 through the coaxial cable 5, and the balun device 3 is electrically connected with the radiation device 2, namely, the coaxial cable 5 is used for feeding the radiation device 2.
Example 2
Based on the structure of embodiment 1, as shown in fig. 4, the two pairs of feeding lines are parallel double lines, and a metal strip line is arranged between the two front feeding lines. The two pairs of feed lines may also be microstrip lines, or may be other types of transmission lines, and the thickness thereof may be set according to practical situations, for example, may be 0.2mm, 0.5mm, or the like. The front and back surfaces may be identical or different in shape, and the distance between the two pairs of feeder lines may be set according to the actual isolation, and are not particularly limited.
The reflecting plate 1 is provided with square slit holes which are arranged corresponding to the balun 31, and the lower ends of the balun 31 penetrate through the slit holes to be connected with the coaxial cable 5, namely the other ends of two pairs of feed lines on the balun device 3 penetrate through the slit holes on the reflecting plate 1; specifically, the lower end of the balun 31 is provided with a via hole, and the coaxial cable 5 includes an inner conductor and an outer conductor, wherein the inner conductor passes through the via hole to be connected with the front power supply line 32, and the outer conductor is connected with the back power supply line 33.
In addition, as shown in fig. 3, the first radiating surface 22, the second radiating surface 23, the third radiating surface 24 and the fourth radiating surface 25 have the same structure, and include two sets of etching slot structures which are oppositely arranged.
In addition, the radiation device 2 is manufactured by PCB processing or metal processing. In this embodiment, the radiation device 2 and the balun device 3 are both made of double-sided copper-clad PCB boards.
As shown in fig. 1, the dielectric plate 21 is provided with at least two through holes 26, in this embodiment, the number of through holes 26 is 4, the through holes 26 are disposed at the center positions of the two sets of etched slot structures, the top of the fixed plastic part 4 is provided with a fastening part 41 fastened with the through holes 26, the fastening part 41 may be formed by a cylinder or a prism, and the top surface is also a plane; the fastening piece 41 can enable the fixed plastic piece 4 to be quickly positioned on each radiation surface and inserted into the radiation surface, so that the fixed plastic piece 4 can be conveniently and firmly fixed on each radiation surface, and the connection stability of the radiation device 2 is improved. The bottom of the fixed plastic part 4 is provided with a plurality of support plates 42, the fixed plastic part 4 is connected with the reflecting plate 1 through the support plates 42, the connection is stable and reliable, the connection stability of the fixed plastic part is improved, and therefore the stability of the whole radiation device is improved.
Fig. 5 is a schematic standing-wave ratio diagram of a broadband antenna radiation device, and it can be known from the standing-wave ratio diagram that standing-wave ratios of two polarized antennas using the broadband antenna radiation device are both less than 1.4, and the frequency range is: 1.7GHz-2.7GHz, the relative bandwidth is 45.5%, the bandwidth is wider, and the antenna performance is excellent.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. A broadband antenna radiating apparatus, characterized by: the device comprises a reflecting plate, a radiation device, a balun device, a fixed plastic piece and a coaxial cable, wherein the fixed plastic piece is fixed above the reflecting plate, the radiation device is fixed above the fixed plastic piece, and the balun device is inserted into the fixed plastic piece and is connected with the radiation device; the radiation device comprises a dielectric plate and two pairs of radiation surfaces arranged on the front side and the back side of the dielectric plate, wherein the two pairs of radiation surfaces are dual-polarized radiation surfaces; the balun device comprises a balun and two pairs of feed lines arranged on the front side and the back side of the balun, one ends of the two pairs of feed lines are respectively connected with the two pairs of radiation surfaces, and the other ends of the two pairs of feed lines are connected with a coaxial cable arranged below the reflecting plate; the two pairs of feed lines comprise two front feed lines arranged on the front side of the balun and two back feed lines arranged on the back side of the balun, wherein one front feed line and one back feed line which are correspondingly arranged form a pair of feed microstrip lines, and the front feed lines are lines with stepped gradual change structures.
2. The broadband antenna radiating apparatus according to claim 1, wherein: the two pairs of feed lines are parallel double lines, and a metal strip line is arranged between the two front feed lines.
3. The broadband antenna radiating apparatus according to claim 1, wherein: the reflecting plate is provided with a gap hole which is arranged corresponding to the balun, and the lower end of the balun passes through the gap hole to be connected with the coaxial cable; the coaxial cable comprises an inner conductor and an outer conductor, wherein the inner conductor passes through the via hole to be connected with the front feed circuit, and the outer conductor is connected with the back feed circuit.
4. The broadband antenna radiating apparatus according to claim 1, wherein: the dual-polarized radiating surfaces with the two pairs of radiating surfaces being +/-45 degrees comprise a first radiating surface, a second radiating surface, a third radiating surface and a fourth radiating surface, wherein the first radiating surface and the second radiating surface are arranged on the front surface of the dielectric plate, the third radiating surface and the fourth radiating surface are arranged on the back surface of the dielectric plate, the first radiating surface and the fourth radiating surface are diagonally arranged to form a pair of radiating surfaces, and the second radiating surface and the third radiating surface are diagonally arranged to form a pair of radiating surfaces.
5. The broadband antenna radiating apparatus of claim 4 wherein: the first radiation surface, the second radiation surface, the third radiation surface and the fourth radiation surface have the same structure and comprise two groups of etching grooving structures which are oppositely arranged.
6. The broadband antenna radiating apparatus according to claim 1, wherein: the radiation device is manufactured by PCB processing or metal processing.
7. The broadband antenna radiating apparatus according to claim 1, wherein: the dielectric plate is provided with at least two through holes, the through holes are arranged at the central positions of the two groups of etching slotting structures, and the top of the fixed plastic part is provided with a clamping piece which is clamped with the through holes.
8. The broadband antenna radiating apparatus of claim 7 wherein: the bottom of the fixed plastic part is provided with a plurality of support plates, and the fixed plastic part is connected with the reflecting plate through the support plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311441218.6A CN117239406A (en) | 2023-11-01 | 2023-11-01 | Broadband antenna radiation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311441218.6A CN117239406A (en) | 2023-11-01 | 2023-11-01 | Broadband antenna radiation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117239406A true CN117239406A (en) | 2023-12-15 |
Family
ID=89098303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311441218.6A Pending CN117239406A (en) | 2023-11-01 | 2023-11-01 | Broadband antenna radiation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117239406A (en) |
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2023
- 2023-11-01 CN CN202311441218.6A patent/CN117239406A/en active Pending
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