CN220021595U - Positioning antenna array and positioning device based on UWB technology - Google Patents
Positioning antenna array and positioning device based on UWB technology Download PDFInfo
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- CN220021595U CN220021595U CN202321676553.XU CN202321676553U CN220021595U CN 220021595 U CN220021595 U CN 220021595U CN 202321676553 U CN202321676553 U CN 202321676553U CN 220021595 U CN220021595 U CN 220021595U
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- 239000002184 metal Substances 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000010287 polarization Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 description 10
- 238000004088 simulation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The embodiment of the utility model discloses a positioning antenna array and a positioning device based on UWB technology, wherein the positioning antenna array comprises a first antenna layer, a first dielectric layer, a second antenna layer, a second dielectric layer and an antenna stratum which are sequentially arranged from top to bottom, the first antenna layer is provided with a UWB directional antenna, the second antenna layer is provided with a UWB omnidirectional antenna, the antenna stratum comprises a metal coverage area, and the metal coverage area is provided with a feed point of the UWB directional antenna, a feed point of the UWB omnidirectional antenna and a grounding hole. The positioning antenna array provided by the utility model has a simple and small structure, and can be applied to a small handheld terminal with high requirement on the size.
Description
Technical Field
The utility model relates to the technical field of positioning, in particular to a positioning antenna array and a positioning device based on UWB technology.
Background
The Ultra Wide Band (UWB) positioning system has the unique advantages of high time resolution, strong multipath interference resistance, low cost, simple structure, strong penetrating capacity and the like, and gets more and more attention in the applications of indoor object searching, tracking and the like.
The antenna array of the current UWB positioning system basically adopts the design scheme of a microstrip directional patch antenna. According to the basic theory of the microstrip directional patch antenna, in order to achieve good radiation performance, the length (radiation side) and width (non-radiation side perpendicular to the radiation side) of the rectangular patch should be about one half wavelength of the microstrip line on the dielectric plate. It is clear that the inherent characteristics of microstrip directional patch antennas not only limit their minimum size, but also limit their use in miniaturized handheld terminals.
Disclosure of Invention
The embodiment of the utility model aims to provide a positioning antenna array and a positioning device based on UWB technology, which are used for solving the problems that the antenna array of a UWB positioning system in the prior art is large in design size and cannot be applied to a miniaturized handheld terminal.
In order to solve the technical problems, the embodiment of the utility model provides the following technical scheme:
according to one aspect of the utility model, a positioning antenna array based on UWB technology is provided, which comprises a first antenna layer, a first dielectric layer, a second antenna layer, a second dielectric layer and an antenna stratum which are sequentially arranged from top to bottom, wherein the first antenna layer is provided with a UWB directional antenna, the second antenna layer is provided with a UWB omnidirectional antenna, the antenna stratum comprises a metal coverage area, and the metal coverage area is provided with a feed point of the UWB directional antenna, a feed point of the UWB omnidirectional antenna and a grounding hole.
Optionally, the UWB directional antenna is a patch antenna and variations thereof, and the UWB omni-directional antenna is a mono/dipole antenna and variations thereof.
Optionally, the polarization directions of the UWB directional antenna and the UWB omni-directional antenna are identical.
Optionally, the physical distance between the radiation centers of the UWB directional antenna and the UWB omnidirectional antenna is less than one half wavelength in vacuum corresponding to the maximum operating frequency.
Optionally, the antenna stratum further comprises a headroom region, and the headroom region is a region corresponding to the vertical direction of the UWB omnidirectional antenna radiator.
Optionally, the UWB directional antenna is disposed at a position where planar distances thereof to four boundaries of the metal coverage area are all equal.
Optionally, the thicknesses of the first antenna layer, the second antenna layer, and the antenna formation are 0.035mm, 0.018mm, and 0.035mm, respectively.
Optionally, the thicknesses of the first dielectric layer and the second dielectric layer are 0.5mm, the dielectric constants are 3.38, and the dielectric losses are 0.0022.
According to another aspect of the present utility model, there is provided a positioning device comprising the positioning antenna array described above.
Optionally, the positioning device further comprises a positioning module, a transmitting and receiving port and a receiving port, wherein the transmitting and receiving port is connected to the UWB omnidirectional antenna of the positioning antenna array, the receiving port is connected to the UWB directional antenna of the positioning antenna array, and the positioning module is connected to the transmitting and receiving port and the receiving port.
The embodiment of the utility model has the beneficial effects that: in the embodiment of the utility model, a positioning antenna array based on UWB technology is provided, which comprises a first antenna layer, a first dielectric layer, a second antenna layer, a second dielectric layer and an antenna stratum which are sequentially arranged from top to bottom; the first antenna layer is provided with a UWB directional antenna, the second antenna layer is provided with a UWB omnidirectional antenna, the antenna stratum comprises a metal coverage area, and the metal coverage area is provided with a feed point of the UWB directional antenna, a feed point of the UWB omnidirectional antenna and a grounding hole. The positioning antenna array provided by the utility model can realize two-dimensional omnidirectional real-time accurate ranging of the terminal to be positioned and accurate ranging and angle measurement of the terminal to be positioned on the front surface of the UWB directional antenna, has a simple and small structure, and can be applied to small handheld terminals with high size requirements.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic diagram of a stacked structure of a positioning antenna array based on UWB technology according to an embodiment of the present utility model;
FIG. 2 is a top view of a first antenna layer of the positioning antenna array of FIG. 1;
FIG. 3 is a top view of a second antenna layer of the positioning antenna array of FIG. 1;
FIG. 4 is a top view of an antenna formation of the positioning antenna array of FIG. 1;
FIG. 5 is a simulation result of the reflection coefficient of the directional antenna in the positioning antenna array shown in FIG. 1;
fig. 6 is a simulation result of reflection coefficient of an omni-directional antenna in the positioning antenna array shown in fig. 1;
fig. 7 is a simulation result of the isolation of a directional antenna and an omni-directional antenna in the positioning antenna array shown in fig. 1;
fig. 8 is a schematic structural diagram of a positioning device according to an embodiment of the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like as used in this specification, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the utility model described below can be combined with one another as long as they do not conflict with one another.
Referring to fig. 1 to 4, a schematic diagram of a positioning antenna array based on UWB technology according to an embodiment of the present utility model is shown. The positioning antenna array comprises a first antenna layer, a first dielectric layer, a second antenna layer, a second dielectric layer and an antenna stratum which are sequentially arranged from top to bottom.
The first antenna layer is provided with a UWB directional antenna, which is a patch antenna and variants thereof. Alternatively, the UWB directional antenna is a rectangular patch antenna. In one example, the thickness is 0.035mm.
The second antenna layer is provided with a UWB omni-directional antenna, which is a mono/dipole antenna and variants thereof. Optionally, the UWB omni-directional antenna is an inverted F antenna. In one example, the thickness is 0.018mm.
In one example, the first dielectric layer and the second dielectric layer each have a thickness of 0.5mm, a dielectric constant of 3.38, and a dielectric loss of 0.0022.
The antenna stratum is used for grounding and comprises a metal coverage area, wherein the metal coverage area corresponds to the position of the UWB directional antenna, and a feed point of the UWB directional antenna, a feed point of the UWB omnidirectional antenna and a grounding hole are arranged on the metal coverage area. In order to cover the radiation energy of the UWB omni-directional antenna to various directions, the antenna layer is further used to set an area corresponding to the vertical radiation direction of the UWB omni-directional antenna as a headroom area.
In one example, the UWB directional antenna is disposed at a position equidistant from the planes of the four boundaries of the ground plane corresponding to the metal coverage area of the antenna formation, i.e., the UWB directional antenna is disposed at a position equidistant from the planes of the four boundaries of the metal coverage area.
In order to better receive the positioning signals emitted by the terminal to be positioned, the polarization directions of the UWB directional antenna and the UWB omnidirectional antenna are consistent. And the radiation centers of the UWB directional antenna and the UWB omnidirectional antenna are positioned on the same plane, and the physical distance between the radiation centers is smaller than one half wavelength in vacuum corresponding to the maximum working frequency. In practical use, to make the UWB directional antenna wide can result in a thicker overall circuit board. If the UWB omni-directional antenna and the UWB directional antenna are designed at the same layer, the performance of the UWB omni-directional antenna may deteriorate to some extent. For this purpose, the UWB omnidirectional antenna and the UWB directional antenna are designed in different layers. Since only one first dielectric layer of only 0.5mm is spaced between the first and second antenna layers, the thickness is completely negligible with respect to the accuracy of the UWB technique (about 10 cm), and thus the radiation centers of the UWB omnidirectional antenna and the UWB directional antenna can be considered to be on the same plane during the test.
In the embodiment of the utility model, the UWB directional antenna is connected with the receiving port of the positioning device, so that the positioning signal sent by the terminal to be positioned on the front side of the UWB directional antenna can be received, and the positioning signal sent by the terminal to be positioned on the back side of the UWB directional antenna can not be received. From this, the orientation of the terminal to be located with respect to the UWB directional antenna can be determined. The UWB omnidirectional antenna is connected with the transmitting and receiving port of the positioning device, so that the omnidirectional detection connection can be carried out on the terminal to be positioned, and the omnidirectional real-time accurate ranging of the terminal to be positioned can be realized. The UWB omnidirectional antenna is matched with the UWB directional antenna, and accurate angle positioning of the terminal to be positioned on the front surface of the UWB directional antenna can be realized.
The layout size of the positioning antenna array depends on two aspects: 1) Plane distance of UWB directional antenna to ground plane boundary; 2) Planar distance of UWB directional antenna and UWB omni-directional antenna. The two plane distances can be determined through simulation according to requirements. To meet the miniaturization requirement, the two plane distances can be reduced as much as possible. It should be noted that, decreasing the planar distance from the UWB directional antenna to the ground plane boundary may deteriorate the directionality of the UWB directional antenna (this situation may cause that when the terminal to be located is close to the positioning antenna array, it cannot be determined whether the terminal to be located is on the front or the back of the UWB directional antenna, and this situation may be solved with the assistance of RSSI techniques or the like). Reducing the planar distance of the UWB directional antenna and the UWB omni-directional antenna reduces the angular accuracy of the end to be positioned.
In one example, applicant has adopted the above design to obtain a positioning antenna array with a size of 17mm by 20mm, and has conducted a related simulation experiment based on the positioning antenna array. Fig. 5 is a simulation result of the reflection coefficient of the directional antenna in the positioning antenna array shown in fig. 1. As can be seen from the graph, the impedance bandwidth range with the reflection coefficient being better than-10 dB is 7.889-8.148GHz, and the absolute bandwidth is 259MHz. Fig. 6 is a simulation result of reflection coefficient of an omni-directional antenna in the positioning antenna array shown in fig. 1. As can be seen from the graph, the impedance bandwidth range with the reflection coefficient being better than-10 dB is 7.572-8.449GHz, the absolute bandwidth is 877MHz, and the working band of UWB CH9 is covered. Fig. 7 is a simulation result of the isolation of the directional antenna and the omni-directional antenna in the positioning antenna array shown in fig. 1. As can be seen, the isolation is 12.6dB at the worst in the UWB CH9 operating band. The simulation results show that the positioning antenna array meets the requirement of UWB accurate positioning.
The embodiment of the utility model also provides a positioning device, as shown in fig. 8, which is a schematic structural diagram of the positioning device provided by the embodiment of the utility model. The positioning device comprises the positioning antenna array 81, the positioning module 82, the transmitting and receiving ports 83 and the receiving port 84, wherein the transmitting and receiving ports 83 are connected to a UWB omni-directional antenna 811 of the positioning antenna array 81, the receiving port 84 is connected to a UWB directional antenna 812 of the positioning antenna array 81, and the positioning module 82 is connected to the transmitting and receiving ports 83 and the receiving port 84.
The positioning device has the functional module and beneficial effects of positioning the antenna array. Technical details not described in detail in this embodiment may be found in the positioning antenna array provided in the embodiment of the utility model.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (10)
1. The utility model provides a location antenna array based on UWB technique, its characterized in that includes from the top down first antenna layer, first dielectric layer, second antenna layer, second dielectric layer and the antenna stratum that sets gradually, first antenna layer is provided with UWB directional antenna, second antenna layer is provided with UWB omnidirectional antenna, the antenna stratum includes the metal coverage area, the metal coverage area is provided with UWB directional antenna's feed point, UWB omnidirectional antenna's feed point and ground hole.
2. The positioning antenna array of claim 1 wherein the UWB directional antenna is a patch antenna and variations thereof and the UWB omni-directional antenna is a mono/dipole antenna and variations thereof.
3. The positioning antenna array of claim 2 wherein the polarization directions of the UWB directional antenna and the UWB omni-directional antenna are identical.
4. The positioning antenna array of claim 1 wherein the physical distance between the radiating centers of the UWB directional antenna and the UWB omnidirectional antenna is less than one-half wavelength in vacuum corresponding to a maximum operating frequency.
5. The positioning antenna array of claim 1, wherein the antenna formation further comprises a headroom region, the headroom region being a region corresponding to a vertical direction of the UWB omnidirectional antenna radiator.
6. The positioning antenna array of claim 5 wherein said UWB directional antenna is disposed at a position where the planar distances thereof to the four boundaries of said metal coverage area are all equal.
7. The positioning antenna array of claim 1 wherein the thicknesses of the first antenna layer, the second antenna layer, and the antenna formation are 0.035mm, 0.018mm, and 0.035mm, respectively.
8. The positioning antenna array of claim 1 wherein the first dielectric layer and the second dielectric layer each have a thickness of 0.5mm, a dielectric constant of 3.38, and a dielectric loss of 0.0022.
9. A positioning device, characterized in that it comprises a positioning antenna array according to any one of claims 1 to 8.
10. The positioning device of claim 9 further comprising a positioning module, a transmit receive port and a receive port, the transmit receive port coupled to a UWB omnidirectional antenna of the positioning antenna array, the receive port coupled to a UWB directional antenna of the positioning antenna array, the positioning module coupled to the transmit receive port and the receive port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321676553.XU CN220021595U (en) | 2023-06-28 | 2023-06-28 | Positioning antenna array and positioning device based on UWB technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321676553.XU CN220021595U (en) | 2023-06-28 | 2023-06-28 | Positioning antenna array and positioning device based on UWB technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021595U true CN220021595U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321676553.XU Active CN220021595U (en) | 2023-06-28 | 2023-06-28 | Positioning antenna array and positioning device based on UWB technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021595U (en) |
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2023
- 2023-06-28 CN CN202321676553.XU patent/CN220021595U/en active Active
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