CN110828996B - Butterfly antenna assembly - Google Patents
Butterfly antenna assembly Download PDFInfo
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- CN110828996B CN110828996B CN201911133312.9A CN201911133312A CN110828996B CN 110828996 B CN110828996 B CN 110828996B CN 201911133312 A CN201911133312 A CN 201911133312A CN 110828996 B CN110828996 B CN 110828996B
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- antenna assembly
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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
- H01Q1/36—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
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
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Abstract
The invention relates to a butterfly antenna assembly, and belongs to the technical field of antennas. The butterfly antenna assembly comprises a flow guide element, a butterfly antenna, a bent grounding structure and a guider. The radiation characteristic of the traditional butterfly antenna is changed by bending the grounding structure, and bidirectional radiation is changed into end-to-end radiation, so that the radiation energy is concentrated in the same direction. Meanwhile, the guider is used as the electromagnetic guider, so that the radiation directivity of the antenna is enhanced, and the radiation energy of the antenna is more concentrated. The electromagnetic energy leaked out from the side surface of the butterfly antenna is collected and guided to the end-fire direction by using the drainage piece, so that the radiation capability and the gain of the antenna are further improved.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a butterfly antenna assembly.
Background
The butterfly antenna is gradually applied to many detection fields such as underground detection and the like by virtue of the characteristic of a wide frequency band, but the butterfly antenna has poor directivity and low radiation gain, so that the detection depth of detection equipment taking the butterfly antenna as a main body is shallow, and the detection accuracy is low.
Disclosure of Invention
The invention aims to provide a butterfly antenna component, aiming at improving the radiation capability and gain of the butterfly antenna.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a butterfly antenna assembly comprises a flow guide element, a butterfly antenna, a bent grounding structure and a guider.
The drainage piece comprises an insulating substrate, and a first metal strip line and a second metal strip line which are respectively arranged on two sides of the insulating substrate.
The butterfly antenna is configured to be disposed between the two current drains.
The curved ground structure is loaded on the bowtie antenna.
The director includes 2 third metal strip lines of group parallel arrangement, the third metal strip line with the radiation piece of butterfly antenna corresponds the setting.
In a specific embodiment, the current guide element and the butterfly antenna have a predetermined gap therebetween.
In a specific embodiment, a supporting foam board is arranged between the current guide piece and the butterfly antenna, and the dielectric constant of the supporting foam board is consistent with that of air.
In a specific embodiment, the curved ground plane structure adopts an exponential gradient structure, and the curvature parameters are as follows:
y＝Ae-B(x-α)-1,1≤x≤20,A＝31,α＝1,B＝0.18。
in a specific embodiment, the first metal strip line is composed of 4 first metal lines arranged in parallel, and the second metal strip line is composed of 4 second metal lines arranged in parallel.
In a specific embodiment, the first metal line and the second metal line have a length of 21mm, a width of 3mm and a spacing of 3 mm.
In a specific embodiment, each group of the third metal strip lines consists of 3 third metal lines arranged in parallel, and the third metal lines are arranged on the surface of the insulating substrate.
In a specific embodiment, the third metal lines have a length of 50mm and a width of 3mm, and the interval between adjacent third metal lines is 7 mm.
In a specific embodiment, the insulating substrate is comprised of an FR-4 dielectric board.
In a specific embodiment, the thickness of the insulating substrate is 1 mm.
Compared with the prior art, the invention has the beneficial effects that: in the invention, the butterfly antenna component comprises a flow guide element, a butterfly antenna, a bent grounding structure and a guider. The radiation characteristic of the traditional butterfly antenna is changed by bending the grounding structure, and bidirectional radiation is changed into end-to-end radiation, so that the radiation energy is concentrated in the same direction. Meanwhile, the guider is used as the electromagnetic guider, so that the radiation directivity of the antenna is enhanced, and the radiation energy of the antenna is more concentrated. The electromagnetic energy leaked out from the side surface of the butterfly antenna is collected and guided to the end-fire direction by using the drainage piece, so that the radiation capability and the gain of the antenna are further improved.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view of a curved grounding structure, a guide and a flow guide provided in the practice of the present invention;
fig. 2 is a front view and a loading step of the curved grounding structure, the guider and the current guiding element loaded on the butterfly antenna according to the embodiment of the present invention;
fig. 3 is a side view of a curved ground structure, a guide member and a flow guide member loaded on a bowtie antenna according to an embodiment of the present invention;
fig. 4 is a comparison graph of S-parameters, gain, and far-field patterns of a bowtie antenna assembly provided by an embodiment of the present invention and an original bowtie antenna;
FIG. 5 shows an example of an equivalent relative permittivity of a single microstructure in a flow guide according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
At present, the traditional butterfly antenna has the characteristic of bidirectional radiation, and if the traditional butterfly antenna is directly used for detection, the detection depth is shallow, the working efficiency is low, and the measurement accuracy is not high.
Referring to fig. 1 and 2, the present invention provides a butterfly antenna assembly including a flow guide element, a butterfly antenna, a curved ground structure, and a director.
The drainage piece is made of an artificial electromagnetic material with an artificial metal microstructure and a high dielectric constant.
When specifically setting up, the drainage piece includes insulating substrate and sets up respectively in first metal strip line and the second metal strip line of insulating substrate both sides.
At the time of the particular setup. The first metal strip line is composed of 4 first metal lines arranged in parallel, and the second metal strip line is composed of 4 second metal lines arranged in parallel.
The length of the first metal strip line is 21mm, the width of the first metal strip line is 3mm, and the interval of the first metal strip line is 3 mm. The length of the second metal strip lines is 21mm, the width of the second metal strip lines is 3mm, and the interval is 3 mm.
The insulating substrate had a square size of 30mm on a side and a thickness of 1 mm. The first metal line and the second metal line are respectively attached to two sides of the insulating substrate. That is, the first metal line and the second metal line are respectively attached to the front surface and the back surface of the insulating substrate, and for example, the first metal line and the second metal line are attached to the insulating substrate by etching, electroplating, drilling, photolithography, electron lithography, or ion lithography.
In a specific arrangement, the insulating substrate is formed of an FR-4 dielectric board. The insulating substrate may be made of a material such as epoxy resin. In addition, to reduce the dielectric loss, the insulating substrate can be made of low-loss Rogers material.
It is understood that, for those skilled in the art, suitable insulating substrate material can be selected according to actual needs. In the present invention, the drainage member is generally a plate-like structure and may be referred to as a drainage plate.
In the present invention, the bowtie antenna is configured to be disposed between two of the flow guides. That is, the same drainage piece is placed on the upper side and the lower side of the butterfly antenna at the same time.
Wherein, there is the predetermined clearance between drainage piece and the butterfly antenna, has the air in the space.
Referring to fig. 3, in another embodiment, a support foam board may be used between the flow director and the bowtie antenna. Wherein the dielectric constant of the supporting foam board is consistent with that of air.
By simulating and testing the situation that the supporting foam board can be used between the flow guide element and the butterfly antenna, the result is shown in fig. 4, and the gain of the antenna is greatly improved as can be seen from fig. 4. This is because the current-guiding material in the present invention has a high equivalent relative permittivity. The flow guide piece is made of artificial materials with high dielectric constants, and forms a device similar to a waveguide on two sides of the butterfly antenna, collects side lobe electromagnetic wave energy radiated in a direction vertical to the antenna substrate and guides the side lobe electromagnetic wave energy to a main radiation direction (namely an end-fire direction). By doing so, the side lobe level can be reduced, and the electromagnetic energy in the main radiation direction can be improved, so that the radiation capability and the gain of the antenna can be improved.
The dielectric constant of the supporting foam board is consistent with that of air, which means that the dielectric constant of the supporting foam board is close to that of air, and the dielectric constant of the supporting foam board can be 1-1.5.
The distance between the drainage piece and the butterfly antenna can be 10mm, wherein the distance between the drainage piece and the butterfly antenna can be adjusted through plastic screws located on the periphery of the insulating substrate.
The curved ground structure is loaded on the butterfly antenna. In the invention, the curved ground plane structure can adopt an index gradual change type structure, and the curvature parameters are as follows:
y＝Ae-B(x-α)-1,1 ≦ x ≦ 20, a ═ 31, α ═ 1, and B ═ 0.18. The curvature parameter can change the radiation characteristic of the butterfly antenna to the maximum extent on the premise of ensuring that other performances of the butterfly antenna meet the working requirements.
In the invention, the traditional butterfly antenna is added with a curved ground structure, the structure plays a role of balun in the structure, and the radiation characteristic of the butterfly antenna is changed from bidirectional radiation to end radiation.
The guider comprises 2 groups of third metal strip lines which are arranged in parallel, and the third metal strip lines are arranged corresponding to the radiation pieces of the butterfly antenna.
On the basis of the structure, two groups of guider structures are introduced, and the performance of the butterfly antenna can be further improved by using the passive guider similar to a yagi antenna.
When the metal strip line is specifically arranged, each group of the third metal strip lines consists of 3 third metal lines arranged in parallel, and the third metal lines are arranged on the surface of the insulating base material.
The third metal lines have a length of 50mm and a width of 3mm, and the interval between adjacent third metal lines is 7 mm.
In the present application, the cross section of the first metal line and the second metal line is rectangular, and the material of the first metal line and the second metal line can be copper, silver or gold. In one specific embodiment, the first metal line and the second metal line are copper lines, and the copper lines have a thickness of 0.03mm, and the equivalent relative permittivity thereof is shown in fig. 5.
It should be noted that, in the present invention, the geometric patterns of the guide and the drainage member are not limited to the metal strip lines, but may be any geometric patterns formed by metal lines, and the drainage member needs to have a high dielectric constant and the operating frequency is matched.
When the radiation characteristics of the butterfly antenna in other frequency bands need to be improved, the bending connection structure, the guider and the drainage piece can be scaled in size.
According to the butterfly antenna component, the radiation characteristic of the traditional butterfly antenna is changed through the bending grounding structure, bidirectional radiation is changed into end-to-end radiation, and therefore radiation energy is concentrated in the same direction. Meanwhile, the guider is used as an electromagnetic guider similar to a yagi antenna, so that the radiation directivity of the antenna is enhanced, and the radiation energy of the antenna is more concentrated. The electromagnetic energy leaked out from the side surface of the butterfly antenna is collected and guided to the end-fire direction by using the drainage piece, so that the radiation capability and the gain of the antenna are further improved.
The butterfly antenna has wide application prospect in the fields of microwave and millimeter wave imaging and the like, and can provide design reference for improving the radiation performance of the traditional antenna. For example, the method has wide application prospect in the fields of underground detection, microwave and millimeter wave imaging and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911133312.9A CN110828996B (en) | 2019-11-19 | 2019-11-19 | Butterfly antenna assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911133312.9A CN110828996B (en) | 2019-11-19 | 2019-11-19 | Butterfly antenna assembly |
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| CN110828996A CN110828996A (en) | 2020-02-21 |
| CN110828996B true CN110828996B (en) | 2021-04-23 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109066078A (en) * | 2018-08-08 | 2018-12-21 | 南京信息职业技术学院 | Multi-frequency-band back cavity type butterfly antenna used on metal platform |
| KR101997698B1 (en) * | 2018-06-08 | 2019-07-09 | 국방과학연구소 | Dual-band quasi-yagi antenna |
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| JP2011166611A (en) * | 2010-02-12 | 2011-08-25 | Dx Antenna Co Ltd | Millimeter wave multi-branching apparatus |
| CN104103900B (en) * | 2014-07-10 | 2016-08-17 | 电子科技大学 | A kind of wideband dual polarized omnidirectional antenna of low section |
| CN204088564U (en) * | 2014-08-08 | 2015-01-07 | 中电科微波通信(上海)有限公司 | Vivaldi antenna and antenna assembly |
| CN104882672A (en) * | 2015-05-28 | 2015-09-02 | 电子科技大学 | Wide bandwidth wave beam circular polarization Yagi-microstrip antenna |
| CN105490016B (en) * | 2016-01-21 | 2018-01-09 | 桂林电子科技大学 | Broadband beam antenna based on resonant mode reflector |
| US10680339B2 (en) * | 2017-04-20 | 2020-06-09 | Laird Connectivity, Inc. | Low profile omnidirectional ceiling mount multiple-input multiple-output (MIMO) antennas |
| CN107658555A (en) * | 2017-08-29 | 2018-02-02 | 湖南湖大华龙电气与信息技术有限公司 | Stepped construction yagi aerial for UWB ultra-wideband communications |
| CN108521022A (en) * | 2018-03-29 | 2018-09-11 | 中国地质大学（北京） | A fully transparent artificial electromagnetic material |
| CN208923345U (en) * | 2018-11-22 | 2019-05-31 | 湖南华诺星空电子技术有限公司 | A kind of miniature ultra wide band plane yagi aerial |
| CN109921181B (en) * | 2019-04-10 | 2024-05-14 | 西南交通大学 | Double-layer butterfly antenna |
| CN110311215A (en) * | 2019-06-21 | 2019-10-08 | 国网甘肃省电力公司 | A UHF-band butterfly microstrip antenna for partial discharge detection in GIS |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101997698B1 (en) * | 2018-06-08 | 2019-07-09 | 국방과학연구소 | Dual-band quasi-yagi antenna |
| CN109066078A (en) * | 2018-08-08 | 2018-12-21 | 南京信息职业技术学院 | Multi-frequency-band back cavity type butterfly antenna used on metal platform |
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