CN211743392U - Wearable equipment and positioning antenna thereof - Google Patents
Wearable equipment and positioning antenna thereof Download PDFInfo
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- CN211743392U CN211743392U CN202020961818.0U CN202020961818U CN211743392U CN 211743392 U CN211743392 U CN 211743392U CN 202020961818 U CN202020961818 U CN 202020961818U CN 211743392 U CN211743392 U CN 211743392U
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- 230000008878 coupling Effects 0.000 claims abstract description 37
- 238000010168 coupling process Methods 0.000 claims abstract description 37
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- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to an electronic communication technical field provides a location antenna and wearable equipment, and above-mentioned location antenna includes: the annular radiator is coupled with a coupling body, and the coupling body extends along the edge of the annular radiator; the feed branch is coupled with the annular radiator, and one end of the feed branch, which is far away from the annular radiator, is used for accessing a radio frequency signal; with the ground connection minor matters of annular radiator coupling connection, the ground connection minor matters is kept away from the one end of annular radiator is used for inserting earth electric signal, and the annular radiator of above-mentioned positioning antenna can produce dextrorotation circular polarized radiation to make positioning antenna can receive navigation satellite signal better, simultaneously, the produced dextrorotation circular polarized radiation of annular radiator also can filter the levogyration circular polarized navigation satellite signal of reflection through high building or ground, in order to reduce multipath interference, thereby effectively improve wearable equipment's positioning antenna's positioning accuracy.
Description
Technical Field
The utility model relates to the technical field of electronic communication, especially, provide a wearable equipment and location antenna thereof.
Background
With the continuous development of electronic communication technology, wearable equipment is more and more favored by people.
However, the positioning accuracy of the wearable device is still subject to the difficulties. Most of positioning antennas of traditional wearable equipment are linear polarization antennas, but signals sent by a navigation satellite are right-handed circularly polarized signals after passing through an ionized layer, so that the positioning antennas of the wearable equipment cannot receive the signals of the navigation satellite completely; moreover, after being reflected by ground, high-rise buildings, trees and other odd times, the navigation satellite signals can become left-handed circularly polarized signals, and the generated multipath interference can further reduce the influence on the positioning accuracy of the wearable equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wearable equipment and location antenna thereof aims at solving the lower technical problem of positioning accuracy of current wearable equipment.
In order to achieve the above object, the utility model adopts the following technical scheme:
a positioning antenna, comprising:
the annular radiator is coupled with a coupling body, and the coupling body extends along the edge of the annular radiator;
the feed branch is coupled with the annular radiator, and one end of the feed branch, which is far away from the annular radiator, is used for accessing a radio frequency signal;
and the grounding branch knot is coupled with the annular radiator, and one end of the grounding branch knot, which is far away from the annular radiator, is used for being connected with an earth electric signal.
The utility model provides a location antenna has following beneficial effect at least: the feed branch is used for coupling feed, the grounding branch is coupled to the ground, and meanwhile, the coupling body extending along the edge of the annular radiator is mutually coupled with the annular radiator, so that two radiation modes of the annular radiator are excited, the two radiation modes have the same amplitude and 90-degree phase difference, namely, the annular radiator generates right-hand circularly polarized radiation, so that the positioning antenna can better receive navigation satellite signals, and meanwhile, the right-hand circularly polarized radiation generated by the annular radiator can also filter left-hand circularly polarized navigation satellite signals reflected by a high-rise building or the ground, so that multipath interference is reduced, and the positioning precision of the positioning antenna of the wearable device is effectively improved.
In one embodiment, the coupling body is a communication antenna.
In one embodiment, the length of the coupling body corresponds to the operating wavelength of the annular radiator.
In one embodiment, the positioning antenna further includes a plurality of inductive devices disposed on the periphery of the annular radiator.
In one embodiment, the inductive device is a lumped inductor or a distributed inductor.
In one embodiment, the distance between the feed stub and the ground stub along the circumference of the ring radiator is 0.125-0.375 times of the operating wavelength of the ring radiator.
In one embodiment, the feeding branch is a T-shaped structure or an L-shaped structure.
In one embodiment, the feeding branch includes a feeding arm and a capacitor, and the capacitor is disposed at an end of the feeding arm close to the annular radiator.
In one embodiment, the grounding branch is a T-shaped structure or an L-shaped structure.
In order to achieve the above object, the utility model also provides a wearable device, including circuit board and above-mentioned location antenna, the feed of the feed branch and knot of location antenna connect in the radio frequency port of circuit board, the ground connection foot of the ground connection branch and knot of location antenna connect in the electric port of ground of circuit board.
Since the wearable device adopts all embodiments of the positioning antenna, at least all beneficial effects of the embodiments are achieved, and no further description is given here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a wearable device provided in an embodiment of the present invention;
FIG. 2 is a schematic view of the wearable device of FIG. 1 with the housing removed;
FIG. 3 is a schematic view of the wearable device of FIG. 1 with the housing and coupling body removed;
fig. 4 is a schematic diagram of S parameters of a positioning antenna according to an embodiment of the present invention;
fig. 5 is a schematic two-dimensional axial ratio diagram of a positioning antenna according to an embodiment of the present invention;
fig. 6 is a two-dimensional axial ratio simulation diagram of the positioning antenna provided in the embodiment of the present invention;
fig. 7 is a schematic diagram of a two-dimensional right-hand circularly polarized gain of a positioning antenna according to an embodiment of the present invention;
fig. 8 is a two-dimensional pattern of the positioning antenna according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10. the antenna comprises a positioning antenna, 11, a ring radiator, 111, a first edge, 112, a second edge, 12, a coupling body, 13, a feed branch, 131, a first coupling section, 132, a feed section, 14, a grounding branch, 141, a second coupling section, 142, a grounding section, 15, an inductance device, 20, a circuit board, 30 and a shell.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed 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 limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example one
Referring to fig. 1 to 3, a wearable device includes a positioning antenna 10 and a circuit board 20 having a radio frequency port and an earth ground port, and receives a navigation satellite signal through the positioning antenna 10.
Specifically, as shown in fig. 1, the wearable device further includes a housing 30, and the circuit board 20 and the positioning antenna 10 are disposed in the housing 30.
The above positioning antenna 10 will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 3, a positioning antenna 10 includes a loop radiator 11, and a coupler 12, a feeding branch 13 and a grounding branch 14 respectively coupled to the loop radiator 11, where the loop radiator 11 is coupled to the coupler 12, the coupler 12 extends along an edge of the loop radiator 11, one end of the feeding branch 13 away from the loop radiator 11 is connected to a radio frequency port of a circuit board 20 to receive a radio frequency signal, and one end of the grounding branch 14 away from the loop radiator 11 is connected to a ground port of the circuit board 20 to receive a ground signal.
The positioning antenna 10 performs coupling feeding through the feeding branch 13, the grounding branch 14 is coupled to the ground, and the coupling body 12 extending along the edge of the annular radiator 11 is coupled with the annular radiator 11, so as to excite two radiation modes of the annular radiator 11, where the two radiation modes have the same amplitude and a phase difference of 90 degrees, that is, the annular radiator 11 generates right-hand circularly polarized radiation, so that the positioning antenna 10 can better receive navigation satellite signals, and meanwhile, the right-hand circularly polarized radiation generated by the annular radiator 11 can also filter left-hand circularly polarized navigation satellite signals reflected by a tall building or the ground, so as to reduce multipath interference, thereby effectively improving the positioning accuracy of the positioning antenna 10 of the wearable device.
To achieve resonance of the positioning antenna 10 in the operating frequency band with a center frequency of 1575MHz, the circumference of the annular radiator 11 is designed to be equal to the operating wavelength. Of course, the circumference of the annular radiator 11 may also be adjusted according to the operation frequency band of the positioning antenna 10, and is not limited in detail here.
Specifically, as shown in fig. 1 to 3, the annular radiator 11 has a square annular structure or a circular annular structure. Of course, the annular radiator 11 may also adopt an orthogonal symmetrical shape structure such as an elliptical ring structure, a rounded square structure, a rectangular structure, a rounded rectangular structure, and the like, and is not particularly limited herein.
In the present embodiment, the coupling body 12 is a communication antenna. Specifically, the communication antenna may be another communication antenna in the wearable device, such as an LTE (Long Term Evolution) antenna, a WIFI (Wireless Fidelity) antenna, and the like, in which case, the other communication antenna in the wearable device, such as an LTE (Long Term Evolution) antenna, a WIFI (Wireless Fidelity) antenna, and the like, is extended along an edge of the annular radiator 11 to generate a coupling effect, so as to reduce a risk that the other antenna in the wearable device deteriorates an axial ratio of the positioning antenna 10, and at the same time, reduce the number of components in the wearable device, and make a structure of the wearable device more compact.
Of course, the positioning antenna 10 may also be coupled with the annular radiator 11 by using a structural metal piece or a circuit board with exposed copper as the coupling body 12, which is not limited in this respect.
In the present embodiment, the length of the coupling body 12 corresponds to the operating wavelength of the annular radiator 11. Specifically, the length of the coupler 12 is substantially equal to the operating wavelength of the annular radiator 11, or the length of the coupler 12 is 0.25 times the operating wavelength of the annular radiator 11. Of course, the coupling body 12 can be adjusted according to the actual use requirement, and is not limited in particular.
In the present embodiment, please refer to fig. 1 to 3, the positioning antenna 10 further includes a plurality of inductive devices 15 disposed on the periphery of the annular radiator 11. Specifically, the inductance devices 15 are uniformly distributed at intervals along the edge of the annular radiator 11. Because the internal installation space of wearable equipment is compact, through set up a plurality of inductance device 15 on the body of annular radiator 11 to reduce positioning antenna 10 size, effectively realize the miniaturization, make positioning antenna 10 applicable in different types of wearable equipment.
As shown in fig. 1 to 3, the annular radiator 11 is provided with four inductive devices 15, but the positioning antenna 10 is not limited thereto, and the inductive devices 15 may be provided in different numbers according to different sizes.
Specifically, the inductance device 15 is a lumped inductance or a distributed inductance. When the inductance device 15 is a distributed inductance, the edge of the annular radiator 11 is in a wavy structure, so that the circumference of the annular radiator 11 reaches a set value, and the space occupied by the annular radiator 11 is reduced to reduce the size of the positioning antenna 10, thereby effectively realizing miniaturization, and enabling the positioning antenna 10 to be applicable to different types of wearable devices.
In this embodiment, the distance between the feeding branch 13 and the grounding branch 14 along the circumference of the annular radiator 11 is 0.1-0.5 times, generally 0.125-0.375 times, the operating wavelength of the annular radiator 11, so as to effectively ensure the same amplitude characteristic and 90-degree phase difference characteristic of the two radiation modes of the positioning antenna 10.
When the annular radiator is of a square structure, a round-corner square structure, a rectangular structure or a round-corner rectangular structure, the two branches are respectively coupled and connected to two adjacent sides of the annular radiator.
In the present embodiment, the feeding branch 13 has a T-shaped structure or an L-shaped structure.
Specifically, as shown in fig. 1 to fig. 3, the feed branch 13 includes a first coupling segment 131 for coupling with the annular radiator 11 and a feed segment 132 connected to the first coupling segment 131, one end of the feed segment 132 away from the first coupling segment 131 is connected to a feed port of the circuit board 20, and a long side of the first coupling segment 131 is coupled to the annular radiator 11.
More specifically, in the case that the feed branch 13 has a T-shaped structure, as shown in fig. 1 to 3, a transverse section of the feed branch 13 is coupled to the annular radiator 11 as the first coupling section 131, and a vertical section of the feed branch 13 is connected to the feed port of the circuit board 20 as the feed section 132; in the case that the feeding branch 13 has an L-shaped structure, one line segment of the feeding branch 13 is coupled to the annular radiator 11 as the first coupling segment 131, and the other line segment of the feeding branch 13 is connected to the feeding port of the circuit board 20 as the feeding segment 132.
In the present embodiment, the grounding branch 14 has a T-shaped structure or an L-shaped structure.
Specifically, as shown in fig. 1 to fig. 3, the ground branch 14 includes a second coupling segment 141 for coupling with the annular radiator 11 and a ground segment 142 connected to the second coupling segment 141, one end of the ground segment 142 away from the second coupling segment 141 is connected to the ground port of the circuit board 20, and a long side of the second coupling segment 141 is coupled to the annular radiator 11.
More specifically, in the case that the ground branch 14 has a T-shaped structure, the horizontal section of the ground branch 14 is coupled with the annular radiator 11 as the second coupling section 141, and the vertical section of the ground branch 14 is connected with the ground port of the circuit board 20 as the ground section 142; in the case that the grounding branch 14 has an L-shaped structure, one line segment of the grounding branch 14 is coupled to the annular radiator 11 as the second coupling segment 141, and the other line segment of the grounding branch 14 is connected to the ground port of the circuit board 20 as the grounding segment 142.
Example two
The difference between this embodiment and the first embodiment is: the feeding branch 13 includes a feeding arm and a capacitor, and the capacitor is disposed at an end of the feeding arm close to the annular radiator 11. Wherein, one end of the feed arm far from the capacitor is connected with the rf port of the circuit board 20, and the other end of the feed arm is connected with the annular radiator 11 through the capacitor.
As can be seen from fig. 4, the positioning antenna 10 resonates at the frequency range of GPSL 1-1575 MHz, which shows that the positioning antenna 10 effectively realizes right-hand circularly polarized radiation and has good reception of navigation satellite signals.
As can be seen from fig. 5 and 6, when the positioning antenna 10 operates in the GPS L1 band — 1575MHz, the axial ratio of the top (phi is 0 °, theta is 0 °) of the positioning antenna 10 is less than 1.5dB, and when the positioning antenna 10 operates in the GPS L1 band-1575 MHz and the section is phi is 0 °, 90 °, θ is-60 ° to 70 °, the axial ratio of the positioning antenna 10 is less than 10dB, which indicates that the axial ratio characteristic of the positioning antenna 10 is better and meets the performance requirement of the positioning antenna 10.
As can be seen from fig. 7 and 8, when the positioning antenna 10 operates in the GPS L1 band — 1575MHz, the right-hand circularly polarized gain at the top of the positioning antenna 10 (phi is 0 °, theta is 0 °) is about-4.3 dB, which is about 3dB higher than that of the conventional linearly polarized antenna, and the positioning effect of the positioning antenna 10 is better than that of the conventional linearly polarized antenna.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A positioning antenna, comprising:
the annular radiator is coupled with a coupling body, and the coupling body extends along the edge of the annular radiator;
the feed branch is coupled with the annular radiator, and one end of the feed branch, which is far away from the annular radiator, is used for accessing a radio frequency signal;
and the grounding branch knot is coupled with the annular radiator, and one end of the grounding branch knot, which is far away from the annular radiator, is used for being connected with an earth electric signal.
2. The positioning antenna of claim 1, wherein: the coupling body is a communication antenna.
3. The positioning antenna of claim 1, wherein: the length of the coupling body corresponds to the working wavelength of the annular radiator.
4. The positioning antenna of claim 1, wherein: the positioning antenna further comprises a plurality of inductance devices arranged on the periphery of the annular radiator.
5. The positioning antenna of claim 4, wherein: the inductance device is lumped inductance or distributed inductance.
6. The positioning antenna of claim 1, wherein: the distance between the feed branch and the grounding branch along the periphery of the annular radiator is 0.125-0.375 times of the working wavelength of the annular radiator.
7. The positioning antenna according to any one of claims 1-6, wherein: the feed branch is of a T-shaped structure or an L-shaped structure.
8. The positioning antenna according to any one of claims 1-6, wherein: the feed branch knot comprises a feed arm and a capacitor, and the capacitor is arranged at one end, close to the annular radiator, of the feed arm.
9. The positioning antenna according to any one of claims 1-6, wherein: the grounding branch is of a T-shaped structure or an L-shaped structure.
10. A wearable device, characterized by: comprising a circuit board and a positioning antenna according to any of claims 1-9, the feed of the feed stub of the positioning antenna being connected to the radio frequency port of the circuit board, and the ground pin of the ground stub of the positioning antenna being connected to the ground port of the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020961818.0U CN211743392U (en) | 2020-05-28 | 2020-05-28 | Wearable equipment and positioning antenna thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020961818.0U CN211743392U (en) | 2020-05-28 | 2020-05-28 | Wearable equipment and positioning antenna thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211743392U true CN211743392U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020961818.0U Active CN211743392U (en) | 2020-05-28 | 2020-05-28 | Wearable equipment and positioning antenna thereof |
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| Country | Link |
|---|---|
| CN (1) | CN211743392U (en) |
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2020
- 2020-05-28 CN CN202020961818.0U patent/CN211743392U/en active Active
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