CN110729557A - EBG structure and millimeter wave microstrip antenna based on EBG structure - Google Patents
EBG structure and millimeter wave microstrip antenna based on EBG structure Download PDFInfo
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- CN110729557A CN110729557A CN201911126627.0A CN201911126627A CN110729557A CN 110729557 A CN110729557 A CN 110729557A CN 201911126627 A CN201911126627 A CN 201911126627A CN 110729557 A CN110729557 A CN 110729557A
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- 239000002184 metal Substances 0.000 claims abstract description 83
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000010586 diagram Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 238000010587 phase diagram Methods 0.000 description 1
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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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- 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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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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Abstract
The invention discloses an EBG structure, which comprises a metal grounding plate, a dielectric substrate, a metal patch and a conductive via hole, wherein the metal patch is of a polygonal structure, the metal patch and the metal grounding plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of the metal patch and is used for connecting the metal patch with the metal grounding plate; the antenna gain of the millimeter wave microstrip antenna is improved by 2-3dB by using the EBG structure, and for the designed microstrip antenna, the EBG structure is added, so that the feed network does not need to be redesigned, and the whole system does not need to be optimally designed and verified, thereby saving time and simultaneously saving cost.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a millimeter wave microstrip antenna based on an EBG structure.
Background
In recent years, with the rapid development of mobile communication, wireless mobile communication has also been widely used. The antenna is an important component of a wireless mobile communication system and is responsible for receiving and transmitting wireless signals. Microstrip antennas have found widespread use in a wide variety of antenna types due to their small size, light weight, planar structure that is easy to integrate with IC devices, easy to mass process, and low cost.
For a designed microstrip antenna, the gain is required to be improved, more antenna units are required to be added, the feed network needs to be redesigned, optimized and verified due to the change of the number of the antenna units, and meanwhile, if the antenna is applied to the fields of radar systems and the like, the whole system needs to be optimally designed, so that great waste in time and cost is caused.
Disclosure of Invention
The invention aims to provide an EBG structure and a millimeter wave microstrip antenna based on the EBG structure, which can realize the improvement of antenna gain by adding an EBG (electromagnetic Band gap) structure on the basis of not changing the original antenna.
In order to solve the technical problem, the invention aims to realize that:
the EBG structure comprises a metal grounding plate, a dielectric substrate, a metal patch and a conductive via hole, wherein the metal patch is of a polygonal structure, the metal patch and the metal grounding plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of the metal patch and is used for connecting the metal patch with the metal grounding plate.
On the basis of the above scheme and as a preferable scheme of the scheme: the metal patch is hexagonal.
On the basis of the above scheme and as a preferable scheme of the scheme: the dielectric substrate is a PCB board which is made of FR4, has a dielectric constant of 4.4, a loss tangent of 0.025 and a thickness of 1 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the conductive via hole is a through hole or a blind hole.
On the basis of the above scheme and as a preferable scheme of the scheme: the millimeter wave microstrip antenna based on the EBG structure comprises a microstrip antenna and a plurality of EBG structures surrounding the microstrip patch antenna, wherein each EBG structure comprises a metal ground plate, a dielectric substrate, a metal patch and a conductive via hole, the metal patch is of a polygonal structure, the metal patch and the metal ground plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of the metal patch and used for connecting the metal patch with the metal ground plate.
On the basis of the above scheme and as a preferable scheme of the scheme: the millimeter wave microstrip antenna based on the EBG structure comprises a microstrip antenna and a plurality of EBG structures which are spaced apart from the microstrip patch antenna by a set distance, wherein the EBG structures are arranged in a periodic front-back staggered manner, each EBG structure comprises a metal ground plate, a dielectric substrate, a metal patch and a conductive via hole, the metal patches are polygonal structures, the metal patches and the metal ground plates are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of each metal patch and is used for connecting the metal patches with the metal ground plates.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
1. for the designed microstrip antenna, by adding the EBG structure, the feed network does not need to be redesigned, and the whole system does not need to be optimally designed and verified, so that the time is saved, and the cost is saved.
2. Practical experiments prove that the antenna gain of the millimeter wave microstrip antenna with the EBG structure is improved by 2-3 dB.
Drawings
FIG. 1 is a schematic diagram of an EBG structure;
FIG. 2 is a schematic diagram of a metal patch structure;
FIG. 3 is a schematic structural diagram of a second embodiment of the millimeter-wave microstrip antenna based on the EBG structure;
FIG. 4 is a schematic diagram of a third structure of an embodiment of a millimeter-wave microstrip antenna based on an EBG structure;
FIG. 5 is an EBG phase diagram;
FIG. 6 is a graph of the gain of the second antenna of the embodiment;
fig. 7 is a graph of the gain of the three antennas of the embodiment.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step, based on the given embodiments, fall within the scope of protection of the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
For a designed microstrip antenna, the gain is required to be improved, more antenna units are required to be added, the feed network needs to be redesigned, optimized and verified due to the change of the number of the antenna units, and meanwhile, if the antenna is applied to the field of radar systems and the like, the whole system needs to be optimally designed, so that the problem of great waste in time and cost is caused.
Example one
With reference to fig. 1-2, the present embodiment discloses an EBG structure, which includes a metal ground plate 4, a dielectric substrate 3, a metal patch 1, and a conductive via 2, where the metal patch 1 is a polygonal structure, the metal patch 1 and the metal ground plate 4 are respectively located on an upper surface and a lower surface of the dielectric substrate 3, and the conductive via 2 is disposed in the center of the metal patch 1 and is used to connect the metal patch 1 and the metal ground plate 4. The EBG structure of the present embodiment has a frequency forbidden band characteristic, the polygonal metal patch on the surface of the dielectric substrate functions as a capacitor, the metal via hole functions as an inductor, the two are combined to form an LC resonant circuit, and in a certain frequency band, electromagnetic waves are reflected, and it is found through research that when the phase is in a range of-90 ° - +90 ° (in combination with fig. 5), the EBG structure functions as an ideal magnetic conductor, and performs 0 ° phase reflection on the electromagnetic waves, so that when the EBG structure is combined with an antenna, the phase of the current is in phase, and the electromagnetic waves in the working frequency band are reflected in phase, thereby increasing the gain of the antenna.
In the preferred embodiment, the dielectric substrate is a PCB board with material FR4, dielectric constant 4.4, loss tangent 0.025 and thickness 1 mm; the metal patch 1 is preferably hexagonal, but can be triangular, quadrangular or other polygonal structures; and the conductive via hole is preferably a through hole or a blind hole.
Example two
With reference to fig. 3, the present embodiment discloses a millimeter wave microstrip antenna based on an EBG structure, including a microstrip antenna 5 and a plurality of EBG structures surrounding the microstrip patch antenna, where the EBG structure includes a metal ground plate 4, a dielectric substrate 3, a metal patch 1 and a conductive via 2, the metal patch 1 is a polygonal structure, the metal patch 1 and the metal ground plate 4 are respectively located on the upper surface and the lower surface of the dielectric substrate 3, and the conductive via 2 is disposed in the center of the metal patch 1 and is used to connect the metal patch 1 with the metal ground plate 4.
The microstrip antenna 5 in the present embodiment is composed of a radiation patch 51, a matching network, and a dielectric substrate, wherein the radiation patch is used for transmitting and receiving electromagnetic waves and has a rectangular shape; the matching network is used for matching the antenna with other systems to reduce reflection; the dielectric substrate is a PCB board with a material FR4, a dielectric constant of 4.4, a loss tangent of 0.025 and a thickness of 1 mm.
The gain effect is shown in fig. 6, by using the EBG structure, the electromagnetic wave is subjected to 0 ° phase reflection, so when the antenna is combined with the antenna, the phase of the current is in phase, the electromagnetic wave in the working frequency band is reflected in phase, and the gain of the antenna is increased, compared with the antenna gain of the millimeter wave microstrip antenna without using the EBG structure of the present application, the antenna gain of the millimeter wave microstrip antenna of the present embodiment is increased by 2-3 dB.
EXAMPLE III
With reference to fig. 4, the present embodiment discloses a millimeter wave microstrip antenna based on an EBG structure, including a microstrip antenna 5 and a plurality of EBG structures spaced apart from the microstrip patch antenna by a set distance, where the EBG structures are arranged in a periodic front-back staggered manner, the EBG structures include a metal ground plate 4, a dielectric substrate 3, a metal patch 1 and a conductive via 2, the metal patch 1 is a polygonal structure, the metal patch 1 and the metal ground plate 4 are respectively located on an upper surface and a lower surface of the dielectric substrate 3, and the conductive via 2 is disposed in the center of the metal patch 1 and is used for connecting the metal patch 1 with the metal ground plate 4.
The microstrip antenna 5 in the present embodiment is composed of a radiation patch 51, a matching network, and a dielectric substrate, wherein the radiation patch is used for transmitting and receiving electromagnetic waves and has a rectangular shape; the matching network is used for matching the antenna with other systems to reduce reflection; the dielectric substrate is a PCB board with a material FR4, a dielectric constant of 4.4, a loss tangent of 0.025 and a thickness of 1 mm.
The gain effect is shown in fig. 7, by using the EBG structure, the electromagnetic wave is subjected to 0 ° phase reflection, so when the antenna is combined with the antenna, the phase of the current is in phase, the electromagnetic wave in the working frequency band is reflected in phase, and the gain of the antenna is increased, compared with the antenna gain of the millimeter wave microstrip antenna without using the EBG structure of the present application, the antenna gain of the millimeter wave microstrip antenna of the present embodiment is increased by 2-3 dB.
It should be noted that the EBG structures in the second embodiment and the third embodiment are not limited to five, a larger number of EBG structures may be used, the placement form may be distributed around the antenna, and the EBG structures may be selected according to specific scenes and requirements; in addition, the distance between the EBG structure and the microstrip antenna in the third embodiment may be selected according to specific scenarios and requirements, so as to optimize the antenna gain.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. An EBG structure, characterized by: the metal patch is of a polygonal structure, the metal patch and the metal ground plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is formed in the center of the metal patch and used for connecting the metal patch with the metal ground plate.
2. The millimeter wave microstrip antenna based on EBG structure of claim 1 wherein: the metal patch is hexagonal.
3. The millimeter wave microstrip antenna based on EBG structure of claim 1 wherein: the dielectric substrate is a PCB board which is made of FR4, has a dielectric constant of 4.4, a loss tangent of 0.025 and a thickness of 1 mm.
4. The millimeter wave microstrip antenna based on EBG structure of claim 1 wherein: the conductive via hole is a through hole or a blind hole.
5. The utility model provides a millimeter wave microstrip antenna based on EBG structure which characterized in that: the antenna comprises a microstrip antenna and a plurality of EBG structures surrounding the microstrip patch antenna, wherein each EBG structure comprises a metal ground plate, a dielectric substrate, a metal patch and a conductive via hole, the metal patch is of a polygonal structure, the metal patch and the metal ground plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of the metal patch and is used for connecting the metal patch with the metal ground plate.
6. The utility model provides a millimeter wave microstrip antenna based on EBG structure which characterized in that: the EBG structure comprises a metal ground plate, a dielectric substrate, a metal patch and a conductive via hole, wherein the metal patch and the metal ground plate are respectively positioned on the upper surface and the lower surface of the dielectric substrate, and the conductive via hole is arranged in the center of the metal patch and is used for connecting the metal patch with the metal ground plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911126627.0A CN110729557A (en) | 2019-11-18 | 2019-11-18 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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| CN201911126627.0A CN110729557A (en) | 2019-11-18 | 2019-11-18 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113191079A (en) * | 2021-04-27 | 2021-07-30 | 杭州电子科技大学 | Combined simulation optimization method of microwave sensor based on electromagnetic surface unit structure |
| CN114709585A (en) * | 2022-03-31 | 2022-07-05 | 西安电子科技大学 | Based on crisscross mushroom type double-deck clearance waveguide directional coupler |
| CN115088133A (en) * | 2020-03-11 | 2022-09-20 | 华为技术有限公司 | Adaptive millimeter wave antenna housing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115088133A (en) * | 2020-03-11 | 2022-09-20 | 华为技术有限公司 | Adaptive millimeter wave antenna housing |
| CN113191079A (en) * | 2021-04-27 | 2021-07-30 | 杭州电子科技大学 | Combined simulation optimization method of microwave sensor based on electromagnetic surface unit structure |
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| CN114709585A (en) * | 2022-03-31 | 2022-07-05 | 西安电子科技大学 | Based on crisscross mushroom type double-deck clearance waveguide directional coupler |
| CN114709585B (en) * | 2022-03-31 | 2022-09-30 | 西安电子科技大学 | Based on crisscross mushroom type double-deck clearance waveguide directional coupler |
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