CN210778967U - 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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- CN210778967U CN210778967U CN201921998647.2U CN201921998647U CN210778967U CN 210778967 U CN210778967 U CN 210778967U CN 201921998647 U CN201921998647 U CN 201921998647U CN 210778967 U CN210778967 U CN 210778967U
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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
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- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The utility model discloses an EBG structure, including metal ground plate, dielectric substrate, metal paster and electrically conductive via hole constitution, the metal paster is polygonal structure, metal paster and metal ground plate are located the upper surface and the lower surface of dielectric substrate respectively, electrically conductive via hole sets up the center that is used for with the metal paster with the metal ground plate is connected in the metal paster; 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 utility model belongs to the technical field of the antenna, specifically speaking relates to a millimeter wave microstrip antenna based on 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 utility model aims at providing a EBG structure and millimeter wave microstrip antenna based on this EBG structure, on the basis that does not change original antenna, through increasing EBG (electromagnetic Band gap) structure, realize the improvement of antenna gain.
In order to solve the technical problem, the purpose of the utility model is to realize like this:
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 utility model outstanding and profitable technological effect is:
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-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
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. An EBG structure according to claim 1, wherein: the metal patch is hexagonal.
3. An EBG structure according to 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. An EBG structure according to 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 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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| CN201921998647.2U CN210778967U (en) | 2019-11-18 | 2019-11-18 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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| CN201921998647.2U CN210778967U (en) | 2019-11-18 | 2019-11-18 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110729557A (en) * | 2019-11-18 | 2020-01-24 | 上海矽杰微电子有限公司 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729557A (en) * | 2019-11-18 | 2020-01-24 | 上海矽杰微电子有限公司 | EBG structure and millimeter wave microstrip antenna based on EBG structure |
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Address after: No. 0459, Unit 209, No. 62 Chengyi North Street, Software Park Phase III, Torch High tech Zone, Xiamen City, Fujian Province, 361000 Patentee after: Sijie Microelectronics (Xiamen) Co.,Ltd. Address before: 201800 room j461, building 6, 1288 Yecheng Road, Jiading District, Shanghai Patentee before: SHANGHAI SILICON MICROELECTRONICS Co.,Ltd. |
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