CN117353012B - Broadband circularly polarized antenna and preparation method thereof - Google Patents
Broadband circularly polarized antenna and preparation method thereof Download PDFInfo
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- CN117353012B CN117353012B CN202311650392.1A CN202311650392A CN117353012B CN 117353012 B CN117353012 B CN 117353012B CN 202311650392 A CN202311650392 A CN 202311650392A CN 117353012 B CN117353012 B CN 117353012B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 230000005855 radiation Effects 0.000 claims abstract description 43
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 11
- 238000005476 soldering Methods 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
Abstract
The invention discloses a broadband circularly polarized antenna and a preparation method thereof, and belongs to the technical field of microwave communication. The antenna comprises a lower-layer printed board, a middle-layer hollow structural member is arranged on the lower-layer printed board, an upper-layer printed board is arranged on the middle-layer hollow structural member, a lower-layer radiation patch is arranged on one surface of the lower-layer printed board, which is close to the middle-layer hollow structural member, an upper-layer radiation patch is arranged on one surface of the upper-layer printed board, which is close to the middle-layer hollow structural member, the upper-layer radiation patch and the lower-layer radiation patch are antenna radiation units, a hollow cavity is arranged in the middle of the middle-layer hollow structural member, and air is used as a part of an antenna radiation medium through the hollow cavity between the lower-layer radiation patch and the upper-layer radiation patch. The problem of the relative bandwidth of the traditional antenna is solved, and the relative bandwidth of the return loss of the antenna smaller than-10 dB can reach 31%.
Description
Technical Field
The invention relates to the technical field of microwave communication, in particular to a broadband circularly polarized antenna and a preparation method thereof.
Background
With the rapid development of millimeter wave communication, the frequency band is higher and the communication bandwidth is wider, and the miniaturization requirement of phased array terminal equipment is higher and higher, so that the design of an antenna faces serious challenges. The traditional vibrator antenna is not suitable for the products with high integration, and the most suitable microstrip antenna is also relatively narrow in bandwidth and does not meet the broadband communication requirement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a broadband circularly polarized antenna and a preparation method thereof.
The aim of the invention is realized by the following technical scheme: the first aspect of the present invention provides: the utility model provides a broadband circular polarization antenna, includes lower floor's printed plate, be provided with middle level fretwork structure on the lower floor's printed plate, be provided with upper strata printed plate on the middle level fretwork structure, the one side that the lower floor's printed plate is close to middle level fretwork structure is provided with lower floor's radiation paster, the one side that the upper strata printed plate is close to middle level fretwork structure is provided with upper radiation paster, upper radiation paster and lower floor's radiation paster are antenna radiation unit, be provided with the fretwork cavity in the middle of the middle level fretwork structure, through the fretwork cavity with the air as the part of antenna radiation medium between lower floor's radiation paster and the upper radiation paster.
Preferably, the middle layer hollow structural member is further provided with an antenna ventilation groove, and the antenna ventilation groove is connected with external air and the hollow cavity to avoid expansion of air in the hollow cavity along with temperature change.
Preferably, the number of the antenna ventilation grooves is four, and the four antenna ventilation grooves are symmetrically arranged around the middle hollow structural member.
Preferably, the lower layer printed board is further provided with an antenna feed hole, and the lower layer printed board integrates the antenna radiating unit and the antenna feed hole, so that the thickness of the section of the antenna is reduced.
Preferably, an elastic SMP connector is further arranged below the lower-layer printed board and used for feeding.
Preferably, the upper layer printed board is an RO5880 board with a dielectric constant of 2.2; the hollow cavity of the middle hollow structural member is filled with air with a dielectric constant of 1; the lower layer printed board is an M6 board with a dielectric constant of 3.6.
Preferably, the upper layer printed board, the middle layer hollow structural member and the lower layer printed board are welded or bonded through conductive adhesive.
A second aspect of the invention provides: a preparation method of a broadband circularly polarized antenna is used for preparing any one of the broadband circularly polarized antennas and comprises the following steps: the upper layer printed board, the middle layer hollow structural part and the lower layer printed board are respectively processed, and the following sub-steps are carried out after the processing is finished:
s1: firstly, combining a lower layer printed board and an antenna carrier board in a soldering tin sintering mode;
s2: then, after the middle hollow structural member and the lower printed board are aligned through an alignment pin, conducting silver paste or low-temperature soldering tin is adopted for combination;
s3: finally, after the middle hollow structural member and the upper printed board are aligned through the alignment pins, conductive silver paste or low-temperature soldering tin is adopted for combination.
Preferably, an antenna ventilation groove protection process is adopted in the preparation process, so that the explosion plate caused by the temperature change of air in the hollow cavity in the manufacturing process is avoided.
The beneficial effects of the invention are as follows:
1) The antenna is composed of an upper-layer radiation patch printed board, a middle-layer hollow structural component and a lower-layer radiation patch feed printed board, wherein the middle-layer hollow structural component is used as a core component, air is used as a part of antenna radiation medium, the thickness of the antenna required medium is reduced, the relative bandwidth of the microstrip antenna is improved, and the problem of mutual coupling of the antenna is solved.
2) The antenna is prepared by bonding or welding processes, and the three parts of the antenna are combined into a whole, so that the problem of the relative bandwidth of the microstrip antenna can be solved, and the microstrip antenna has the advantages of simple process, low cost, short processing period and the like.
3) The problem of the relative bandwidth of the traditional antenna can be solved, and the relative bandwidth of the return loss of the antenna smaller than-10 dB can reach 31%.
Drawings
FIG. 1 is a diagram of a wideband circularly polarized antenna of the present invention;
FIG. 2 is a diagram of a heterogeneous printed board radio frequency interconnect;
FIG. 3 is a cross-sectional view of a wideband circularly polarized antenna according to the present invention;
FIG. 4 is a diagram of a wideband circularly polarized antenna of the present invention;
FIG. 5 is a graph of relative bandwidth versus single medium and multi-medium stacks;
in the figure, 1-upper layer radiating patches; 2-a lower layer radiation patch; 3-antenna feed holes; 4-upper layer printed board; 5-middle hollow structural parts; 6-a lower layer printed board; 7-an antenna ventilation groove; 8-a surface and bottom layer pattern of the middle hollow structural member; 9-antenna carrier, 10-elastomeric SMP connector, 11-adhesive or sinter bonding face.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
The three-dimensional structure of the antenna is shown in fig. 1, and the antenna is composed of an upper-layer radiation patch printed board, a middle-layer hollow structural member and a lower-layer radiation patch feed printed board. The antenna introduces an ultralow-profile hollow structural part into a double-layer radiation patch of a conventional microstrip antenna, and takes air as a part of an antenna radiation medium, so that the thickness of the medium required by the antenna is reduced, and the relative bandwidth of the microstrip antenna is improved. The three parts of the antenna are respectively and independently processed, and are combined into a whole through a conventional welding process or a conductive adhesive bonding process.
Referring to fig. 1-5, the present invention provides a technical solution: the first aspect of the present invention provides: the utility model provides a broadband circular polarization antenna, includes lower floor's printed plate, be provided with middle level fretwork structure on the lower floor's printed plate, be provided with upper strata printed plate on the middle level fretwork structure, the one side that the lower floor's printed plate is close to middle level fretwork structure is provided with lower floor's radiation paster, the one side that the upper strata printed plate is close to middle level fretwork structure is provided with upper radiation paster, upper radiation paster and lower floor's radiation paster are antenna radiation unit, be provided with the fretwork cavity in the middle of the middle level fretwork structure, through the fretwork cavity with the air as the part of antenna radiation medium between lower floor's radiation paster and the upper radiation paster.
In some embodiments, the middle hollow structural member is further provided with an antenna ventilation groove, and the antenna ventilation groove is connected with external air and the hollow cavity to avoid expansion of air in the hollow cavity along with temperature change.
In some embodiments, the number of the air-permeable slots of the antenna is four, and the air-permeable slots are symmetrically arranged around the middle hollow structural member.
In some embodiments, the lower printed board is further provided with an antenna feed hole, and the lower printed board integrates the antenna radiating unit and the antenna feed hole, so that the thickness of the section of the antenna is reduced.
In some embodiments, a flexible SMP connector is further provided below the lower printed board for feeding.
In some embodiments, the upper layer printed board is an RO5880 board with a dielectric constant of 2.2; the hollow cavity of the middle hollow structural member is filled with air with a dielectric constant of 1; the lower layer printed board is an M6 board with a dielectric constant of 3.6.
The relative bandwidth of the general microstrip antenna is very narrow, and the broadband communication requirement of millimeter waves is not met. The ultra-low profile hollow structural member is introduced, and air is used as a part of the antenna radiation medium, so that the thickness of the medium required by the antenna is reduced, and the relative bandwidth of the microstrip antenna is improved. The upper layer printed board adopts a board with a low dielectric constant, so that the bandwidth of the antenna is increased, and the energy transmission loss is reduced. The middle hollow structural member is used as a core member of the antenna, and is not only a main body supporting member of the antenna, but also a key of electrical performance; the antenna not only solves the bandwidth problem, but also plays roles of antenna grounding, mutual coupling and the like. The hollow structural member has more implementation modes, can be a metal structural member, can be a printed board with copper paved on the upper surface and the lower surface, and can be other mediums with plating layers on the surfaces. The lower layer printed board uses a board with a conventional dielectric constant, integrates an antenna radiating unit and a feed interface, and reduces the section thickness of the antenna. The antenna has the advantages that all parts are independently processed, so that the bandwidth problem of the microstrip antenna can be solved, the processing difficulty of the antenna printed board can be greatly reduced, the processing period is shortened, and the product cost is reduced.
In some embodiments, the upper layer printed board, the middle layer hollow structural member and the lower layer printed board are welded or bonded through conductive adhesive.
A second aspect of the invention provides: a preparation method of a broadband circularly polarized antenna is used for preparing any one of the broadband circularly polarized antennas and comprises the following steps: the upper layer printed board, the middle layer hollow structural part and the lower layer printed board are respectively processed, and the following sub-steps are carried out after the processing is finished:
s1: firstly, combining a lower layer printed board and an antenna carrier board in a soldering tin sintering mode;
s2: then, after the middle hollow structural member and the lower printed board are aligned through an alignment pin, conducting silver paste or low-temperature soldering tin is adopted for combination;
s3: finally, after the middle hollow structural member and the upper printed board are aligned through the alignment pins, conductive silver paste or low-temperature soldering tin is adopted for combination.
In some embodiments, an antenna ventilation groove protection process is adopted in the preparation process, so that the explosion plate caused by the temperature change of air in the hollow cavity in the preparation process is avoided.
The preparation method adopts a low-cost process route for preparation, the preparation scheme is specifically implemented in such a way that an antenna upper-layer radiation patch printed board, a middle-layer hollow structural part and a lower-layer radiation patch feed printed board are respectively processed, the antenna lower-layer printed board and an antenna carrier board are combined in a soldering tin sintering mode, then the middle-layer hollow structural part and the lower-layer printed board are combined after being aligned through an alignment pin, conductive silver paste or low-temperature soldering tin is adopted for combination, the protection process of an antenna ventilation groove is paid attention to in the combination process, the effect of the ventilation groove is achieved, the problem that the printed board explodes due to the fact that air in a hollow cavity changes along with temperature is avoided in the preparation process and the actual use, finally the upper-layer printed board is combined in the same alignment mode, so that the whole antenna is combined, and an elastic SMP (SMP) is adopted for feeding the antenna feed port for combination. The preparation method has the advantages of low profile, good index, low cost, simple process and short processing period.
Fig. 5 is a graph of relative bandwidth versus single medium and multi-medium superposition, with frequency on the abscissa and gain on the ordinate.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (8)
1. A wideband circularly polarized antenna, characterized by: the antenna comprises a lower-layer printed board, wherein a middle-layer hollow structural member is arranged on the lower-layer printed board, an upper-layer printed board is arranged on the middle-layer hollow structural member, a lower-layer radiation patch is arranged on one surface, close to the middle-layer hollow structural member, of the lower-layer printed board, an upper-layer radiation patch is arranged on one surface, close to the middle-layer hollow structural member, of the upper-layer printed board, the upper-layer radiation patch and the lower-layer radiation patch are antenna radiation units, a hollow cavity is arranged in the middle of the middle-layer hollow structural member, and air is used as a part of antenna radiation medium through the hollow cavity between the lower-layer radiation patch and the upper-layer radiation patch; the middle-layer hollow structural member is further provided with an antenna ventilation groove, and the antenna ventilation groove is connected with outside air and the hollow cavity.
2. The wideband circularly polarized antenna of claim 1, wherein: the four air-permeable slots of the antenna are symmetrically arranged around the middle hollow structural member.
3. The wideband circularly polarized antenna of claim 1, wherein: the lower printed board is also provided with an antenna feed hole, and the lower printed board integrates an antenna radiating unit and the antenna feed hole.
4. The wideband circularly polarized antenna of claim 1, wherein: and an elastic SMP connector is also arranged below the lower-layer printed board and used for feeding.
5. The wideband circularly polarized antenna of any one of claims 1-4, wherein: the upper layer printed board is an RO5880 board with a dielectric constant of 2.2; the hollow cavity of the middle hollow structural member is filled with air with a dielectric constant of 1; the lower layer printed board is an M6 board with a dielectric constant of 3.6.
6. The wideband circularly polarized antenna of any one of claims 1-4, wherein: the upper layer printed board, the middle layer hollow structural member and the lower layer printed board are welded or bonded through conductive adhesive.
7. A preparation method of a broadband circularly polarized antenna is characterized by comprising the following steps of: a method for manufacturing a wideband circularly polarized antenna as claimed in any one of claims 1 to 6, comprising the steps of: the upper layer printed board, the middle layer hollow structural part and the lower layer printed board are respectively processed, and the following sub-steps are carried out after the processing is finished:
s1: firstly, combining a lower layer printed board and an antenna carrier board in a soldering tin sintering mode;
s2: then, after the middle hollow structural member and the lower printed board are aligned through an alignment pin, conducting silver paste or low-temperature soldering tin is adopted for combination;
s3: finally, after the middle hollow structural member and the upper printed board are aligned through the alignment pins, conductive silver paste or low-temperature soldering tin is adopted for combination.
8. The method for manufacturing a wideband circularly polarized antenna according to claim 7, wherein: the antenna ventilation groove protection technology is adopted in the preparation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311650392.1A CN117353012B (en) | 2023-12-05 | Broadband circularly polarized antenna and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311650392.1A CN117353012B (en) | 2023-12-05 | Broadband circularly polarized antenna and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117353012A CN117353012A (en) | 2024-01-05 |
| CN117353012B true CN117353012B (en) | 2024-04-12 |
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|---|---|---|---|---|
| JPH0644221U (en) * | 1992-11-25 | 1994-06-10 | 日立化成工業株式会社 | Planar antenna |
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