CN210516986U - 24GHz high-gain metamaterial microstrip antenna - Google Patents
24GHz high-gain metamaterial microstrip antenna Download PDFInfo
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- CN210516986U CN210516986U CN201920479776.4U CN201920479776U CN210516986U CN 210516986 U CN210516986 U CN 210516986U CN 201920479776 U CN201920479776 U CN 201920479776U CN 210516986 U CN210516986 U CN 210516986U
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Abstract
A24 GHz high-gain metamaterial microstrip antenna comprises an antenna substrate, a microstrip patch, a coaxial feed device, metamaterial elements and a metal ground plate, wherein the antenna substrate made of polyethylene, the microstrip patch made of metal radiation, the coaxial feed device, the metamaterial elements and the metal ground plate coated with copper are combined with one another to form the microstrip antenna, twelve groups of elements are etched on the periphery of the antenna substrate and are used as the metamaterial antenna substrate together with a dielectric substrate. The utility model overcomes former microstrip antenna gain is low, and radiant efficiency is low, the big problem of loss, has simple structure, and overall structure is compact, and occupation space is little, and antenna gain has the characteristics of obvious improvement.
Description
Technical Field
The utility model belongs to the technical field of microstrip antenna, a 24GHz high-gain metamaterial microstrip antenna is related to.
Background
The microstrip antenna is a new choice for the automotive millimeter wave radar antenna due to the advantages of small volume, simple structure, low cost, easy conformation with other electromagnetic devices and convenient integration with a feed network and other active devices, and an automotive radar system adopting the microstrip antenna array is available at present. However, the conventional microstrip antenna has relatively low gain, large performance influence by the dielectric plate, easy excitation of surface waves, energy loss, low power capacity, narrow frequency band, poor isolation between feeding and radiating elements, poor directivity and other defects, and further development and application of the microstrip antenna are restricted. Common methods for improving the gain of a microstrip antenna include reducing the inherent quality factor of the antenna by using a dielectric plate with a low dielectric constant, adding a parasitic patch, or forming a single antenna into an array, but these methods also have disadvantages such as large size, complex structure, high cost, and the like while improving the gain of the antenna.
Disclosure of Invention
The utility model aims to solve the technical problem that a 24GHz high-gain metamaterial microstrip antenna is provided, simple structure adopts microstrip paster and coaxial line feeder of polyethylene base plate, metal radiation, metamaterial's elementary and metal ground plate inter combination to constitute microstrip antenna, and twelve group's elementary sculpture is around the antenna substrate periphery to regard as the metamaterial base plate together with the medium base plate, overall structure is compact, and occupation space is little, and antenna gain obviously improves, and is with low costs.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a24 GHz high-gain metamaterial microstrip antenna comprises an antenna substrate, a microstrip patch, a coaxial feed device, elements and a metal ground plate; the antenna substrate is a polyethylene substrate, the microstrip patch is a metal radiation patch, the coaxial feed device is a coaxial feed probe, the elements are metamaterial elements, the metal ground plate is a metal copper coating, the number of the elementis twelve, the elementis etched on the periphery of the antenna substrate, and the elementis and the dielectric substrate are used as a metamaterial substrate; the upper end of the coaxial feed device is connected with the microstrip patch, and the lower end of the coaxial feed device is connected with a metal grounding plate connected with the antenna substrate.
When the working frequency is near 24GHz, the resonance frequency of the elements is also near 24GHz, and the electromagnetic super characteristics of the artificial electromagnetic super material inhibit the surface wave of the microstrip antenna.
The element is formed by arranging and combining square copper sheets with the thickness of 0.017 mm.
The primitive has no chamfer, circular arc curved surface or curve structure.
The length and width of each element are 2.1 mm, and each element is composed of a plurality of squares with the length and width of 0.21 mm.
The microstrip patch has a length and width of 4.029mm and 3.4714mm, respectively.
The length and width of the antenna substrate are 10mm, and the thickness of the antenna substrate is 1 mm.
The coaxial feed device is located at the center and shifts towards the width direction of the microstrip patch, and the shift distance is 1.2523 mm.
A24 GHz high-gain metamaterial microstrip antenna comprises an antenna substrate, a microstrip patch, a coaxial feed device and an element; the antenna substrate is a polyethylene substrate, the microstrip patch is a metal radiation patch, the coaxial feed device is a coaxial feed probe, and the element is a metamaterial element; the grounding plate is a metal copper coating, twelve groups of elements are etched on the periphery of the antenna substrate, and the grounding plate and the dielectric substrate are used as a metamaterial substrate; the upper end of the coaxial feed device is connected with the microstrip patch, and the lower end of the coaxial feed device is connected with a metal grounding plate connected with the antenna substrate. The antenna has a simple structure, the antenna substrate, the metal radiating microstrip patch, the coaxial feed device, the metamaterial elements and the metal ground plate are combined with each other to form the microstrip antenna, twelve groups of elements are etched on the periphery of the antenna substrate and are used as the metamaterial substrate together with the dielectric substrate, the whole structure is compact, the occupied space is small, the antenna gain is obvious, and the cost is low.
Preferably, the length and width of the metal grounding plate are 10 x 10mm, namely, a copper cladding layer is etched on the whole back surface of the substrate, and the thickness of the cladding layer is 0.35mm.
In a preferable scheme, when the working frequency is near 24GHz, the metamaterial resonant frequency is also near 24GHz, and the electromagnetic super-suppression microstrip antenna surface wave is realized. The structure is simple, twelve groups of elements are arranged around a microstrip patch on an antenna substrate according to a certain rule to form metamaterial resonance elements, the structure of the resonance elements is obtained by topology optimization of a microstrip antenna, the requirement that the working frequency is close to 24GHz of the automotive millimeter wave radar is met, the resonance frequency is consistent with the working frequency of the antenna, the surface wave of the antenna is restrained, the radiation performance of the antenna is improved, and the gain of the antenna is obviously improved.
Preferably, the element can be arranged in a circle of two or more circles, and the element can be arranged in a single circle, so that the size is small, the structure is simple, the circuit board etching technology is used for realizing the element, and the cost is low.
In a preferred scheme, the element is formed by arranging and combining square copper sheets with the thickness of 0.017 mm. The structure is simple, the element is 0.017mm thick, the thickness is thin, the specification is small, the occupied space is small, and the cost is low.
In a preferred embodiment, the elements are free of chamfers, curved surfaces or curvilinear structures. The structure is simple, and the compactness is better when a plurality of elements without chamfers, circular arc curved surfaces or curve structures are mutually combined.
In a preferred embodiment, the individual elements are 2.1 mm long and wide, respectively, and are made up of a plurality of squares 0.21mm long and wide, respectively. The structure is simple, the element is composed of a plurality of grids with smaller specifications, the side lengths of the element are equal, the specifications are the same, the universality is good, and the processing cost is low.
In a preferred embodiment, the microstrip patch has a length and width of 4.029mm and 3.4714mm, respectively. Simple structure, the length and width is 4.029mm and 3.4714 mm's microstrip paster respectively, and the specification is little, and occupation space is little, and is with low costs.
In a preferred embodiment, the antenna substrate is a polyethylene sheet having a length and width of 10mm and a thickness of 1 mm. The antenna substrate made of the polyethylene plate has the advantages of being good in insulating property, rigidity and toughness and improving the strength of the whole structure.
Preferably, the thickness of the antenna substrate is less than one fifth of the operating wavelength of the antenna.
In a preferred scheme, the coaxial feeding device is located at the center of the antenna and is offset towards the width direction of the microstrip patch, and the offset distance is 1.2523 mm.
Preferably, the reserved gaps of the elements in the horizontal and vertical directions of the antenna substrate are 0.02mm, and the gaps of the elements in the horizontal and vertical directions are 0.433mm and 0.367 mm. The distribution is uniform, and each element and the microstrip patch do not interfere with each other.
A24 GHz high-gain metamaterial microstrip antenna comprises an antenna substrate, a microstrip patch, a coaxial feed device and elements, wherein the antenna substrate made of a metamaterial, the microstrip patch made of metal radiation, the coaxial feed device and the elements made of the metamaterial are combined with one another to form the microstrip antenna, twelve groups of elements are etched on the periphery of the antenna substrate and are used as the metamaterial substrate together with the dielectric substrate. The utility model overcomes former microstrip antenna gain is low, and the structure is complicated, and the problem that the specification is big has simple structure, and overall structure is compact, and occupation space is little, and antenna gain has obvious, characteristics with low costs.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a schematic diagram of the metamaterial resonant structure of fig. 1.
Fig. 4 is a schematic diagram of the front etching structure of the present invention.
In the figure: the antenna comprises an antenna substrate 1, a microstrip patch 2, a coaxial feed device 3, a basic element 4 and a metal grounding plate 5.
Detailed Description
As shown in fig. 1 to 4, a 24GHz high-gain metamaterial microstrip antenna comprises an antenna substrate 1, a microstrip patch 2, a coaxial feed device 3, a primitive 4 and a metal ground plate 5; the antenna substrate 1 is a microstrip antenna substrate, the microstrip patch 2 is a metal radiation patch, the coaxial feed device 3 is a coaxial feed probe, the element 4 is a metamaterial element, and the metal ground plate 5 is a copper coating; twelve groups of the elements 4 are etched on the periphery of the antenna substrate 1 and are used as a metamaterial substrate together with the dielectric substrate; the upper end of the coaxial feed device 3 is connected with the microstrip patch 2, and the lower end is connected with the metal grounding plate 5 connected with the antenna substrate 1. The antenna has a simple structure, the antenna substrate 1, the metal radiating microstrip patch 2, the coaxial feed device 3, the metamaterial elements 4 and the metal ground plate 5 are combined with each other to form a microstrip antenna, twelve groups of the elements 4 are etched on the periphery of the antenna substrate 1 and are used as the metamaterial substrate together with the dielectric substrate, and the antenna is compact in overall structure, small in occupied space, obvious in antenna gain and low in cost.
Preferably, the length and width of the metal grounding plate 5 are 10 x 10mm, and the copper-clad thickness is 0.35mm.
In a preferable scheme, when the working frequency is near 24GHz, the metamaterial resonant frequency is also near 24GHz, and the electromagnetic super-suppression microstrip antenna surface wave is realized. The structure is simple, twelve groups of elements 4 are arranged around the microstrip patch 2 on the antenna substrate 1 according to a certain rule, the structure of the elements is obtained through topology optimization, the working frequency is close to 24GHz of the automotive millimeter wave radar, the resonant frequency of the elements is consistent with the working frequency of the antenna, the surface wave of the antenna is restrained, the radiation performance of the antenna is improved, and the gain of the antenna is obviously improved.
Preferably, the element can be arranged in a circle of two or more circles, and the element can be arranged in a single circle, so that the size is small, the structure is simple, the circuit board etching technology is used for realizing the element, and the cost is low.
In a preferred scheme, the element 4 is formed by arranging and combining square copper sheets with the thickness of 0.017 mm. The structure is simple, the element 4 with the thickness of 0.017mm is adopted, the thickness is thin, the specification is small, the occupied space is small, and the cost is low.
In a preferred scheme, the element 4 has no chamfer, circular arc surface or curve structure. The structure is simple, and the compactness is better when a plurality of elements 4 without chamfers, circular arc curved surfaces or curve structures are combined with each other.
In a preferred embodiment, the length and width of a single element 4 are 2.1 mm, respectively, and are composed of a plurality of squares with length and width of 0.21mm, respectively. The structure is simple, the element 4 is composed of a plurality of grids with smaller specifications, the side lengths of the elements 4 are equal, the specifications are the same, the universality is good, and the processing cost is low.
In a preferred embodiment, the microstrip patch 2 has a length and a width of 4.029mm and 3.4714mm, respectively. Simple structure, the length and width is 4.029mm and 3.4714 mm's microstrip paster 2 respectively, and the specification is little, and occupation space is little, and is with low costs.
In a preferred embodiment, the antenna substrate 1 is a polyethylene sheet having a length and width of 10mm and a thickness of 1 mm. Simple structure, the antenna substrate 1 of polyethylene board preparation has good, rigidity and toughness good insulating properties, has improved overall structure intensity.
Preferably, the thickness of the antenna substrate 1 is less than one fifth of the operating wavelength of the antenna.
In a preferred scheme, the coaxial feeding device is located at the center of the antenna and is offset towards the width direction of the microstrip patch, and the offset distance is 1.2523 mm.
Preferably, the element has a gap of 0.02mm reserved at the edge of the antenna substrate in the horizontal and vertical directions, and the gaps of 0.433mm and 0.367mm arranged in the horizontal and vertical directions of the element 4. The distribution is uniform, and the elements 4 and the microstrip patches 2 do not interfere with each other.
When the 24GHz high-gain metamaterial microstrip antenna is processed and manufactured, the antenna substrate 1, the metal radiating microstrip patch 2, the coaxial feed device 3, the metamaterial elements 4 and the metal ground plate 5 are combined with one another to form the microstrip antenna, twelve groups of the elements 4 are etched on the periphery of the antenna substrate 1 and are used as the metamaterial substrate together with the dielectric substrate, and the microstrip antenna is compact in overall structure, small in occupied space, obvious in antenna gain and low in cost.
Twelve groups of elements 4 are arranged around the microstrip patch 2 on the antenna substrate 1 according to a certain rule to form metamaterial resonance elements, the structure of the resonance elements is obtained by topology optimization of the microstrip antenna, the requirement that the working frequency is close to 24GHz of the automotive millimeter wave radar is met, the resonance frequency is consistent with the working frequency of the antenna, the surface wave of the antenna is restrained, the radiation performance of the antenna is improved, and the gain of the antenna is obviously improved.
The element 4 with the thickness of 0.017mm has the advantages of thin thickness, small specification, small occupied space and low cost.
When a plurality of elements 4 without chamfers, circular arc curved surfaces or curve structures are combined with each other, the compactness is better.
The element 4 is composed of a plurality of grids with smaller specifications, the side lengths of the elements 4 are equal, the specifications are the same, the universality is good, and the processing cost is low.
The microstrip radiating patch 2 with the length and width of 4.029mm and 3.4714mm respectively has small specification, small occupied space and low cost.
The antenna substrate 1 made of the polyethylene plate has good insulating property, good rigidity and toughness, and the overall structural strength is improved.
The coaxial feed device 3 deviated from the center of the microstrip antenna has a distance of 1.2523mm deviated from the width direction of the microstrip patch 2, and the structure is compact.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (8)
1. A24 GHz high-gain metamaterial microstrip antenna is characterized in that: the antenna comprises an antenna substrate (1), a microstrip patch (2), a coaxial feed device (3), a primitive (4) and a metal grounding plate (5); the antenna substrate (1) is a metamaterial substrate, the microstrip patch (2) is a metal radiation patch, the coaxial feed device (3) is a coaxial feed probe, the element (4) is a metamaterial element, and the metal ground plate (5) is a metal copper coating; twelve groups of the elements (4) are etched on the periphery of the antenna substrate (1) and are used as a metamaterial substrate together with the dielectric substrate; the upper end of the coaxial feed device (3) is connected with the microstrip patch (2), and the lower end of the coaxial feed device is connected with a metal grounding plate (5) connected with the antenna substrate (1); the element (4) is formed by arranging and combining a plurality of square copper sheets.
2. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: when the working frequency of the microstrip antenna is near 24GHz, the metamaterial resonant frequency of the microstrip antenna is also near 24GHz, and the electromagnetic super-suppression microstrip antenna surface wave is realized.
3. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: the thickness of the single square copper sheet is 0.017 mm.
4. The 24GHz high-gain metamaterial microstrip antenna of claim 3, wherein: the element (4) has no chamfer, circular arc curved surface or curve structure.
5. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: the length and the width of the single element (4) are respectively 2.1 mm, and the element is composed of a plurality of squares with the length and the width of respectively 0.21 mm.
6. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: the length and the width of the microstrip patch (2) are 4.029mm and 3.4714mm respectively.
7. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: the antenna substrate (1) is a polyethylene plate with the length and width of 10mm and the thickness of 1 mm.
8. The 24GHz high-gain metamaterial microstrip antenna of claim 1, wherein: the coaxial feed device (3) is located at the center and is deviated towards the width direction of the microstrip patch (2), and the deviation distance is 1.2523 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920479776.4U CN210516986U (en) | 2019-04-10 | 2019-04-10 | 24GHz high-gain metamaterial microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920479776.4U CN210516986U (en) | 2019-04-10 | 2019-04-10 | 24GHz high-gain metamaterial microstrip antenna |
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| Publication Number | Publication Date |
|---|---|
| CN210516986U true CN210516986U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920479776.4U Expired - Fee Related CN210516986U (en) | 2019-04-10 | 2019-04-10 | 24GHz high-gain metamaterial microstrip antenna |
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| CN (1) | CN210516986U (en) |
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2019
- 2019-04-10 CN CN201920479776.4U patent/CN210516986U/en not_active Expired - Fee Related
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Granted publication date: 20200512 |
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| CF01 | Termination of patent right due to non-payment of annual fee |