CN213242796U - Antenna and door lock thereof - Google Patents
Antenna and door lock thereof Download PDFInfo
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- CN213242796U CN213242796U CN202022151041.4U CN202022151041U CN213242796U CN 213242796 U CN213242796 U CN 213242796U CN 202022151041 U CN202022151041 U CN 202022151041U CN 213242796 U CN213242796 U CN 213242796U
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Abstract
The utility model discloses an antenna and lock thereof, the antenna includes: the first conducting layer, the first dielectric layer, the second conducting layer, the second dielectric layer and the third conducting layer are arranged in sequence; the width of the first conducting layer and the width of the second conducting layer are both smaller than or equal to the width of the third conducting layer, the width of the first conducting layer is different from the width of the second conducting layer, and the second conducting layer is used for feeding power to the first conducting layer. The second conducting layer is added as a radiator on the basis that the first conducting layer is used as a radiator, and because the width of the first conducting layer is different from that of the second conducting layer, a frequency band of the first conducting layer and a frequency band of the second conducting layer generate a set, so that a wider bandwidth is formed.
Description
Technical Field
The utility model relates to an antenna technology field especially relates to antenna and lock thereof.
Background
Smart homes are deep in the aspects of human life, and smart home products are the mainstream trend of the electronic industry. The intelligent doorplate is provided with a Bluetooth antenna, so that the Bluetooth function can be realized. In the prior art, the relative bandwidth of a conventional microstrip antenna is about 1%, and the bandwidth of the antenna is too narrow.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing an antenna and lock thereof to solve the too narrow problem of bandwidth of antenna among the prior art.
In one aspect, an embodiment of the present invention provides an antenna, including:
the first conducting layer, the first dielectric layer, the second conducting layer, the second dielectric layer and the third conducting layer are arranged in sequence;
the width of the first conducting layer and the width of the second conducting layer are both smaller than or equal to the width of the third conducting layer, the width of the first conducting layer is different from the width of the second conducting layer, and the second conducting layer is used for feeding power to the first conducting layer.
As a further improved technical solution, a gap is provided on the second conductive layer.
As a further improved technical scheme, the gap is a dumbbell-shaped gap, an H-shaped gap or a strip-shaped gap.
As a further improved technical solution, the dumbbell-shaped slot includes:
a first circular portion;
a second circular portion;
a communication portion that communicates the first circular portion and the second circular portion.
As a further improved technical solution, the thickness of the first dielectric layer is smaller than that of the second dielectric layer.
As a further improved technical scheme, the thickness of the first dielectric layer is 0.01-1 mm.
As a further improved technical scheme, the thickness of the second dielectric layer is 0.1-3 mm.
As a further improved technical solution, the length of the first conductive layer is the same as the length of the third conductive layer, and the width of the first conductive layer is the same as the width of the third conductive layer;
the first conductive layer or the third conductive layer is grounded.
As a further improved technical scheme, the first conductive layer, the second conductive layer and the third conductive layer are all copper foils;
the first dielectric layer and the second dielectric layer are both epoxy glass fiber cloth substrates.
As a further improved technical solution, the antenna further includes:
and the inner conductor of the coaxial line is connected with the second conductive layer, and the outer conductor of the coaxial line is connected with the third conductive layer.
As a further improved technical scheme, a via hole is arranged on the second dielectric layer, and the via hole can be used for the coaxial line to pass through.
In a second aspect, an embodiment of the present invention provides a door lock, including: an antenna as claimed in any preceding claim.
Has the advantages that: the second conducting layer is added on the basis that the first conducting layer is used as a radiating body, the first conducting layer is fed through the second conducting layer, and due to the fact that the width of the first conducting layer is different from that of the second conducting layer, a collection set is generated between the frequency band of the first conducting layer and the frequency band of the second conducting layer, and therefore a wide bandwidth is formed.
Drawings
Fig. 1 is a first side view of the antenna of the present invention.
Fig. 2 is a second side view of the antenna of the present invention.
Fig. 3 is an exploded view of the antenna of the present invention.
Fig. 4 is a top view of the second conductive layer and the third conductive layer of the present invention.
Fig. 5 is a bottom view of the second conductive layer and the third conductive layer of the present invention.
Fig. 6 is a schematic structural diagram of the third conductive layer and the coaxial line in the present invention.
Fig. 7 is a VSWR graph of the antenna according to the present invention.
Fig. 8 is a spatial omnidirectional radiation pattern of the antenna of the present invention.
Fig. 9 is a spatial omnidirectional radiation pattern of the H-plane of the antenna under the metal doorplate of the present invention.
Fig. 10 is a spatial omnidirectional radiation pattern of the antenna under the metal doorplate on the E-plane in the present invention.
10. A first conductive layer; 20. a first dielectric layer; 30. a second conductive layer; 31. a gap; 311. a first circular portion; 312. a second circular portion; 313. a communicating portion; 40. a second dielectric layer; 41. a via hole; 50. a third conductive layer; 60. a coaxial line; 61. an inner conductor; 62. an outer conductor; d1, the thickness of the first dielectric layer; d2, thickness of second dielectric layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The inventor finds that the Bluetooth antenna is arranged in the intelligent doorplate, and when the Bluetooth function is realized, the relative bandwidth of the existing antenna is about 1%, so that the use bandwidth of Bluetooth is too narrow.
In order to solve the above problem, an antenna in an embodiment of the present invention includes: the first conducting layer, the first dielectric layer, the second conducting layer, the second dielectric layer and the third conducting layer are arranged in sequence; a gap is formed in the second conducting layer; the width of the first conducting layer and the width of the second conducting layer are both smaller than or equal to the width of the third conducting layer, and the width of the first conducting layer is different from the width of the second conducting layer. The second conducting layer is added as a radiator on the basis that the first conducting layer is used as a radiator, and because the width of the first conducting layer is different from that of the second conducting layer, a collection is generated between the frequency band of the first conducting layer and the frequency band of the second conducting layer, and a wider bandwidth is formed.
Various non-limiting embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-3, the present invention provides an antenna, including: the first conducting layer 10, the first dielectric layer 20, the second conducting layer 30, the second dielectric layer 40 and the third conducting layer 50 are arranged in sequence; the width of the first conductive layer and the width of the second conductive layer 30 are both smaller than or equal to the width of the third conductive layer 50, the width of the first conductive layer 10 is different from the width of the second conductive layer 30, and the second conductive layer 30 is used for feeding power to the first conductive layer 10.
Specifically, the second conductive layer 30 is added as a radiator on the basis that the first conductive layer 10 is used as a radiator, the first conductive layer 10 is fed through the second conductive layer 30, and the first conductive layer 10 and the second conductive layer 30 have different widths, so that the frequency band of the first conductive layer 10 during operation is different from the frequency band of the second conductive layer 30 during operation, and the two frequency bands can form a frequency band aggregate, thereby obtaining a wider bandwidth.
In one implementation of the embodiment of the present invention, a gap 31 is disposed on the second conductive layer 30.
Specifically, a gap is provided on the second conductive layer 30, and the gap electric field induces the first conductive layer 10 to feed power by using the principle that the gap electric field coupling generates an induced electric field, thereby realizing multi-layer radiation. The slit may be disposed along a length direction of the second conductive layer 30. In addition to feeding the first conductive layer 10 with a slot, a slot may be provided on the second conductive layer 30 to feed the first conductive layer 10. Of course, the feeding mode of the first conductive layer 10 also includes direct feeding by using microstrip lines or coaxial lines.
For example, the length and width dimensions of the three conductive layers can be set as desired. As shown in fig. 3, the width of the first conductive layer 10 is greater than the width of the second conductive layer 30. As shown in fig. 4, the width of the third conductive layer 50 is greater than the width of the second conductive layer 30, and the length of the third conductive layer 50 is equal to the length of the second conductive layer 30.
It should be noted that the frequency band of bluetooth is the ISM band of 2.4-2.485 GHz. The length and width of the first conductive layer 10 may be determined according to the wavelength, for example, the length and width of the first conductive layer 10 are each one-fourth of the wavelength. Of course, the length and width of the first conductive layer 10 may also be determined according to debugging. During the debugging process, the length and width of second conductive layer 30 and the length and width of first conductive layer 10 may be changed at the same time, so that the frequency band of first conductive layer 10 and the frequency band of second conductive layer 30 complement each other to form a wider frequency band. The utility model provides an antenna has the bandwidth more than 4%, realizes bluetooth 2.4-2.5 GHz's use bandwidth.
The antenna of the present invention is a microstrip antenna, the radiation of which is generated by the fringe field between the radiation layer and the ground layer. For example, in one implementation of the present invention, the first conductive layer 10 and the second conductive layer 30 serve as radiation layers, the third conductive layer 50 is grounded, and the third conductive layer 50 serves as a ground layer.
The utility model discloses when being applied to the house plate, utilize microstrip antenna radiation edge to produce the principle of space electric field, when the metal is pressed close to the house plate metal sheet, not only do not have the influence to the antenna electric field, increase ground produces beneficial effect to the radiation on the contrary in other words. That is to say, the antenna is anti metal, low profile bluetooth antenna, adapts to intelligent house plate metal environment.
In one implementation of the embodiment of the present invention, as shown in fig. 4, the gap 31 is a dumbbell-shaped gap, an H-shaped gap, or a bar-shaped gap. In particular, with the dumbbell-shaped slot, the bandwidth of the antenna can be further increased. Other shapes, such as H-shaped slits, strip slits, etc., may of course also be used.
In an implementation manner of the embodiment of the present invention, as shown in fig. 4, the dumbbell-shaped gap includes: a first circular portion 311; a second circular portion 312; a communication portion 313, the communication portion 313 communicating the first circular portion 311 and the second circular portion 312. Specifically, the first circular portion 311 and the second circular portion 312 are both circular through holes, and the sizes of the two circular portions may be the same or different. The communication portion 313 is in the form of a rectangular through hole, and the width of the communication portion 313 is smaller than the diameter of the first circular portion 311 and, of course, smaller than the diameter of the second circular portion 312.
In one implementation of the embodiment of the present invention, as shown in fig. 1, the thickness D1 of the first dielectric layer 20 is smaller than the thickness D2 of the second dielectric layer 40. Specifically, the thickness D1 of the first dielectric layer 20 and the thickness D2 of the second dielectric layer 40 are set as desired. The thickness D1 of the first dielectric layer 20 is small, that is, the distance between the first conductive layer 10 and the second conductive layer 30 is small; the thickness D2 of the second dielectric layer 40 is greater, that is, the spacing between the second conductive layer 30 and the third conductive layer 50 is greater.
In one implementation of the embodiment of the present invention, the thickness D1 of the first dielectric layer 20 is smaller, and the thickness D1 of the first dielectric layer 20 is 0.01-1 mm. For example, the thickness D1 of the first dielectric layer 20 is 0.1 to 0.3mm, and specifically, the thickness D1 of the first dielectric layer 20 is 0.2 mm.
In one implementation of the embodiment of the present invention, the thickness D2 of the second dielectric layer 40 is larger, and the thickness D2 of the second dielectric layer 40 is 0.1-3 mm. For example, the thickness D2 of the second dielectric layer 40 is 1-2mm, and specifically, the thickness D2 of the second dielectric layer 40 is 1.6 mm.
In one implementation of the embodiment of the present invention, as shown in fig. 3, the length of the first conductive layer 10 is the same as the length of the third conductive layer 50, and the width of the first conductive layer 10 is the same as the width of the third conductive layer 50, that is, the length and width of the first conductive layer 10 are the same as the length and width of the second conductive layer 30. Either one of the first conductive layer 10 and the third conductive layer 50 may serve as a ground layer, that is, the first conductive layer 10 or the third conductive layer 50 is grounded. The first conductive layer 10 and the third conductive layer 50 may be used interchangeably. When the antenna is applied to a doorplate, since the first conductive layer 10 and the third conductive layer 50 can be used interchangeably, the metal surface of the doorplate can be used to make up for the lack of area of the ground plane of the antenna.
In one implementation of the embodiment of the present invention, the first conductive layer 10, the second conductive layer 30 and the third conductive layer 50 are all copper foils. The utility model discloses in adopt the copper foil as the conducting layer, first conducting layer 10, second conducting layer 30 and third conducting layer 50 can adopt the same or inequality material to make, for example, three conducting layer all adopts the copper foil. Of course, other materials than copper foil may be used, for example, aluminum foil.
In one implementation of the embodiment of the present invention, the first dielectric layer 20 and the second dielectric layer 40 are both epoxy glass fabric substrates.
Specifically, the utility model discloses can adopt ordinary FR4 to be the substrate, that is to say, adopt epoxy glass fabric base plate, epoxy glass fiber fabric base plate promptly, as the dielectric layer. Of course, other materials may be used for the dielectric layers, such as air dielectric layer, as shown in fig. 2 for the first dielectric layer 20 and the second dielectric layer 40.
In one implementation manner of the embodiment of the present invention, as shown in fig. 3, fig. 5 and fig. 6, the antenna further includes: a coaxial line 60, an inner conductor 61 of the coaxial line 60 being connected to the second conductive layer 30, and an outer conductor 62 of the coaxial line 60 being connected to the third conductive layer 50.
In particular, the second conductive layer 30 is fed by a coaxial line 60, the inner conductor 61 of the coaxial line 60 being connected to the second conductive layer 30, and the outer conductor 62 of the coaxial line 60 being connected to the third conductive layer 50.
In one implementation manner of the embodiment of the present invention, the second dielectric layer 40 is provided with a via hole 41, and the via hole 41 can be used for the coaxial line 60 to pass through. In particular, a via 41 is provided in the second dielectric layer 40, and the coaxial line 60 may pass through the via 41 and be connected to the second conductive layer 30 through the inner conductor 61 of the coaxial line 60.
The antenna of the above embodiment was tested with a bandwidth range of 2.4-2.53GHz at a VSWR <2 for the independent module, with a relative bandwidth of 5.4%, see fig. 7. The independent modules radiate omni-directionally in space, the maximum gain is-5.3 dBi, and the out-of-roundness is less than 3 dB. See fig. 8. The antenna is not affected by metal, and the maximum gain of the H surface is-6.3 dBi and the maximum gain of the E surface is-3.5 dBi under the background of the metal doorplate. The gain is increased by approximately 1.8dBi compared to the independent module, see fig. 9-10.
Based on the antenna of above-mentioned embodiment, the utility model also provides a preferred embodiment of lock:
the utility model discloses a door lock, include: an antenna as described above.
It should be understood that various technical features of the above-mentioned embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the above-mentioned embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations should be considered as the scope of the description in the present specification.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (11)
1. An antenna, comprising:
the first conducting layer, the first dielectric layer, the second conducting layer, the second dielectric layer and the third conducting layer are arranged in sequence;
the width of the first conducting layer and the width of the second conducting layer are both smaller than or equal to the width of the third conducting layer, the width of the first conducting layer is different from the width of the second conducting layer, and the second conducting layer is used for feeding power to the first conducting layer.
2. The antenna of claim 1,
and a gap is arranged on the second conducting layer.
3. The antenna of claim 2,
the gap is a dumbbell-shaped gap, an H-shaped gap or a strip-shaped gap.
4. The antenna of claim 3, wherein the dumbbell slot comprises:
a first circular portion;
a second circular portion;
a communication portion that communicates the first circular portion and the second circular portion.
5. The antenna of claim 1,
the thickness of the first dielectric layer is smaller than that of the second dielectric layer.
6. The antenna of claim 1,
the thickness of the first dielectric layer is 0.01-1 mm;
the thickness of the second dielectric layer is 0.1-3 mm.
7. The antenna of claim 1,
the length of the first conducting layer is the same as that of the third conducting layer, and the width of the first conducting layer is the same as that of the third conducting layer;
the first conductive layer or the third conductive layer is grounded.
8. The antenna of claim 1,
the first conducting layer, the second conducting layer and the third conducting layer are all copper foils;
the first dielectric layer and the second dielectric layer are both epoxy glass fiber cloth substrates.
9. The antenna of any one of claims 1-8, further comprising:
and the inner conductor of the coaxial line is connected with the second conductive layer, and the outer conductor of the coaxial line is connected with the third conductive layer.
10. The antenna of claim 9,
and a through hole is formed in the second dielectric layer and can be used for the coaxial line to pass through.
11. A door lock, comprising:
an antenna as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151041.4U CN213242796U (en) | 2020-09-27 | 2020-09-27 | Antenna and door lock thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151041.4U CN213242796U (en) | 2020-09-27 | 2020-09-27 | Antenna and door lock thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213242796U true CN213242796U (en) | 2021-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022151041.4U Active CN213242796U (en) | 2020-09-27 | 2020-09-27 | Antenna and door lock thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213242796U (en) |
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2020
- 2020-09-27 CN CN202022151041.4U patent/CN213242796U/en active Active
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