CN115548663A - Wearable device - Google Patents
Wearable device Download PDFInfo
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- CN115548663A CN115548663A CN202211214962.8A CN202211214962A CN115548663A CN 115548663 A CN115548663 A CN 115548663A CN 202211214962 A CN202211214962 A CN 202211214962A CN 115548663 A CN115548663 A CN 115548663A
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- 239000002184 metal Substances 0.000 claims abstract description 175
- 230000005855 radiation Effects 0.000 claims abstract description 27
- 239000003989 dielectric material Substances 0.000 claims abstract description 26
- 230000010287 polarization Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application provides a wearing equipment belongs to electronic product technical field, and this wearing equipment includes: the device comprises a device body and a fixing band, wherein a half-mode resonant cavity antenna unit and a high-dielectric material filling medium are arranged on the fixing band, the half-mode resonant cavity antenna unit comprises a first metal layer, a second metal layer and a metal connecting structure, the distance from the first metal layer to the back surface of the fixing band is smaller than the distance from the second metal layer to the back surface of the fixing band, the metal connecting structure is connected with the first metal layer and the second metal layer respectively, the first metal layer, the second metal layer and the metal connecting structure are enclosed to form a metal resonant cavity with an opening at one side, the opening of the metal resonant cavity faces to the target side edge of the fixing band, and a gap for radiation is formed in the second metal layer; the high-dielectric material filling medium is arranged between the target side and the opening of the metal resonant cavity; wherein, the target side is first side or second side, and first side and second side are two relative sides that the bandeau set up along length direction.
Description
Technical Field
The application relates to the technical field of electronic products, in particular to a wearable device.
Background
With the development of electronic products, a wireless communication function can be implemented in a wearable device, at present, an antenna (for example, a Global Positioning System (GPS) antenna) is generally disposed in a device body in the wearable device, and since the device body is generally provided with a large number of metal devices, a space for disposing the antenna is small, and the metal devices may affect radiation performance of the antenna. Therefore, the problem that the radiation performance of the wearable device is poor exists in the prior art.
Disclosure of Invention
The embodiment of the application provides wearing equipment to solve the relatively poor problem of radiation performance of wearing equipment.
In a first aspect, an embodiment of the present application provides a wearable device, including: the device comprises a device body and a fixing band, wherein the device body is connected with the fixing band, the fixing band is provided with a half-mode resonant cavity antenna unit and a high-dielectric material filling medium,
the half-mode resonant cavity antenna unit comprises a first metal layer, a second metal layer and a metal connecting structure, the distance from the first metal layer to the back surface of the fixing band is smaller than the distance from the second metal layer to the back surface of the fixing band, the metal connecting structure is respectively connected with the first metal layer and the second metal layer, the first metal layer, the second metal layer and the metal connecting structure enclose to form a metal resonant cavity with one side opened, the opening of the metal resonant cavity faces to the target side edge of the fixing band, and a gap for radiation is formed in the second metal layer;
the high-dielectric material filling medium is arranged between the target side and the opening of the metal resonant cavity;
the target side is a first side or a second side, and the first side and the second side are two opposite sides arranged along the length direction of the fixing belt.
In the embodiment of the application, a half-mode resonant cavity antenna unit and a high-dielectric material filling medium are arranged on a fixed belt, the half-mode resonant cavity antenna unit comprises a first metal layer, a second metal layer and a metal connecting structure, the distance from the first metal layer to the back of the fixed belt is smaller than the distance from the second metal layer to the back of the fixed belt, the metal connecting structure is connected with the first metal layer and the second metal layer respectively, the first metal layer, the second metal layer and the metal connecting structure are enclosed to form a metal resonant cavity with an opening at one side, the opening of the metal resonant cavity faces to a target side edge of the fixed belt, and a gap for radiation is arranged on the second metal layer; the high-dielectric material filling medium is arranged between the target side and the opening of the metal resonant cavity; the target side is a first side or a second side, and the first side and the second side are two opposite sides arranged along the length direction of the fixing belt. Therefore, the antenna structure is formed on the fixed belt, and the radiation performance of the antenna is improved because the fixed belt is not interfered by a metal structure generally. Meanwhile, the half-mode resonant cavity antenna unit and the high-dielectric material filling medium are matched, so that the radiation direction of the antenna can be adjusted, and the radiation performance of the antenna is further improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a wearable device provided in an embodiment of the present application;
FIG. 2 is a schematic view of another angle of the wearable device of FIG. 1;
fig. 3 is an effect diagram of the wearable device provided by the embodiment of the application after being worn;
fig. 4 is a second schematic structural diagram of a wearable device provided in the embodiment of the present application;
fig. 5 is a schematic circuit structure diagram of the wearable device in fig. 4;
fig. 6 is a third schematic structural diagram of a wearable device according to an embodiment of the present application;
fig. 7 is a schematic circuit configuration diagram of the wearable device in fig. 6;
fig. 8 is a fourth schematic structural view of a wearable device provided in an embodiment of the present application;
fig. 9 is a schematic circuit configuration diagram of the wearable device in fig. 8;
fig. 10 is a fifth schematic structural view of the wearable device provided in the embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, 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 functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 9, the wearable device provided in the embodiment of the present application includes a device body 10 and a fixing band 20, where the device body 10 is connected to the fixing band 20, a half-mode resonant cavity antenna unit 21 and a high-dielectric material filling medium 22 are disposed on the fixing band 20,
the half-mode resonant cavity antenna unit 21 includes a first metal layer 211, a second metal layer 212, and a metal connection structure 213, a distance from the first metal layer 211 to the back 201 of the fixed tape 20 is smaller than a distance from the second metal layer 212 to the back 201 of the fixed tape 20, the metal connection structure 213 is connected to the first metal layer 211 and the second metal layer 212, the first metal layer 211, the second metal layer 212, and the metal connection structure 213 enclose to form a metal resonant cavity with an opening at one side, the opening of the metal resonant cavity faces a target side of the fixed tape 20, and a slot 2121 for radiation is formed in the second metal layer 212;
the high dielectric material filling medium 22 is arranged between the target side and the opening of the metal resonant cavity;
the target side is a first side 202 or a second side 203, and the first side 202 and the second side 203 are two opposite sides of the fixing band 20 along the length direction.
For better understanding of the present application, a coordinate system as shown in fig. 1 and 2 may be established, wherein the Z-axis direction may be understood as a thickness direction of the fastening band 20, the X-axis direction may be understood as a width direction of the fastening band 20, and the Y-axis direction may be understood as a length direction of the fastening band 20.
In the embodiment of the present application, the back surface 201 and the front surface of the fastening tape 20 may be understood as two opposite surfaces in the Z-axis direction, and the first side edge 202 and the second side edge 203 may be understood as two opposite sides in the X-axis direction. As shown in fig. 3, when the wearing apparatus is worn on the arm 100 of the user, the back surface 201 of the fastening band 20 can be understood as a surface of the fastening band 20 that is attached to the arm 100 of the user.
Optionally, the wearable device may be a watch, a smart band, or the like, which is not further limited herein. In the following embodiments, a wearable device is taken as a watch as an example for detailed description. Considering an actual wearing manner of a user, taking a left hand as an example, when the swing amplitude of the arm of the user is large (running state), the radiation direction of the antenna beneficial to the user experience should be concentrated near the range of the interval corresponding to 9 o 'clock to 6 o' clock; when the arm swings a little (slow walking state), the radiation direction of the antenna beneficial to the user experience should be concentrated near 9 o' clock.
Optionally, the first metal layer 211, the second metal layer 212 and the metal connection structure 213 enclose a metal resonant cavity with one side open, and it can be understood that the metal connection structure 213 is not disposed on a side of the metal resonant cavity facing the target side. For example, the metal resonator is substantially rectangular, wherein the second metal layer 212 is a top surface, the first metal layer 211 is a bottom surface, the three sides are surrounded by the metal connection structure 213, the side surface facing the target side is an open environment (i.e. the above opening), which forms an equivalent ideal Magnetic Conductor (PMC) boundary, and the open environment region is filled with a high dielectric material filling medium, so that a surface wave generated by the filled high dielectric material filling medium can cause the radiation direction of the antenna unit of the half-mode resonator to shift toward the high dielectric material filling medium, thereby causing the antenna pattern to shift toward the target side. Like this, after the user wears wearing equipment, can make the antenna direction concentrate the direction of devising to appointed direction (like the direction of 9 o ' clock or the direction that the interval scope that 6 o ' clock to 9 o ' clock correspond is located) to improve the radiation performance of antenna, and then can realize good location under the state that the user walked slowly and ran.
It should be understood that the formula for calculating the resonant frequency of the metal resonant cavity is as follows:
wherein m represents the number of half wavelengths in the X direction, n represents the number of half wavelengths in the Y direction, and p represents the number of half wavelengths in the Z direction, i.e., m, n, and p represent the resonant mode of the resonant cavity; c denotes a space between the first metal layer 211 and the second metal layer 212. a represents the length of the metal resonator in the X direction, and b represents the length of the metal resonator in the Y direction.
It should be noted that by changing the values of a and b to change the resonant frequency of the metal resonant cavity, and by providing the slot 2121 in the second metal layer 212, a resonant cavity antenna can be formed. The standing wave and the bandwidth of the whole antenna can be optimized by adjusting the position of the slot deviated from the center point of the metal resonant cavity (the slot cannot be placed at the center position, and the center position is a current zero point), adjusting the length and the width of the slot and adjusting the impedance.
Alternatively, the antenna structure formed by the half-mode resonant cavity antenna unit 21 may be a GPS antenna, and may also be used as another antenna, which is not further limited herein.
Alternatively, the first metal layer 211 may be disposed on the back surface 201 of the fixing tape 20, or may be disposed in the fixing tape 20; the second metal layer 212 may be disposed on the front surface of the fixing tape 20, or may be disposed in the fixing tape 20. Since the first metal layer 211 is disposed at the back surface 201 or a position close to the back surface 201 of the fixing tape 20, the second metal layer 212 is disposed at the front surface or a position close to the front surface of the fixing tape 20, and the slit 2121 is disposed on the second metal layer 212. Therefore, the direction of the antenna radiation is far away from the human body, the interference of the human body to the antenna radiation is avoided, and the performance of the antenna radiation is improved.
Alternatively, the high dielectric material filled medium can be understood as having a dielectric constant higher than that of SiO 2 The filling medium of the material of (1) can be set according to actual needs, and is not further limited.
In this embodiment, by disposing the half-mode resonant cavity antenna unit 21 and the high-dielectric material filling medium 22 on the fixed strap 20, the half-mode resonant cavity antenna unit 21 includes a first metal layer 211, a second metal layer 212, and a metal connection structure 213, where a distance from the first metal layer 211 to the back surface 201 of the fixed strap 20 is smaller than a distance from the second metal layer 211 to the back surface 201 of the fixed strap 20, the metal connection structure 213 is connected to the first metal layer 211 and the second metal layer 212, respectively, and the first metal layer 211, the second metal layer 212, and the metal connection structure 213 enclose and form a metal resonant cavity with an opening on one side, the opening of the metal resonant cavity faces a target side edge of the fixed strap 20, and the second metal layer 212 is provided with a gap 2121 for radiation; the high dielectric material filling medium 22 is arranged between the target side and the opening of the metal resonant cavity; the target side edge is a first side edge 202 or a second side edge 203, and the first side edge 202 and the second side edge 203 are two opposite side edges of the fixing band 20 arranged along the length direction. This forms an antenna structure on the fixing strip 20, which improves the radiation performance of the antenna because there is usually no interference of metal structure on the fixing strip 20. Meanwhile, the half-mode resonant cavity antenna unit and the high-dielectric material filling medium are matched, so that the radiation direction of the antenna can be adjusted, and the radiation performance of the antenna is further improved.
It should be understood that the specific structure of the metal connection structure 213 may be set according to actual needs, for example, in some embodiments, the metal connection structure 213 includes a plurality of first metal holes spaced apart from each other, and one end of each of the first metal holes is electrically connected to the first metal layer 211, and the other end of each of the first metal holes is electrically connected to the second metal layer 212.
In the embodiment of the present application, the first metal hole may be understood as a hole having a metal conductive layer on an inner wall, and the metal conductive layer is electrically connected to the first metal layer 211 and the second metal layer 212, respectively.
Optionally, in some embodiments, a ratio of a distance between two adjacent first metal holes to an aperture diameter of the first metal hole is less than or equal to 2, which may make energy ratio radiated from the distance between two adjacent first metal holes smaller. As shown in fig. 1, three rows of first metal holes may be uniformly spaced, so that one metal resonator is constructed using the close enclosure of the first metal holes. The metal hole can be directly realized through punching and electroplating processes, so that the structure is simple and the process production is convenient.
Optionally, in some embodiments, a vertical projection of the gap 2121 on the target side is located within a vertical projection of the high-k material filling medium 22 on the target side.
In the embodiment of the present application, the gap 2121 may be understood as a gap groove formed in the second metal layer 212, and other non-metallic media may be filled in the gap 2121 to ensure the flatness of the surface of the second metal layer 212.
The vertical projection of the gap 2121 on the side of the target is located in the vertical projection of the high-dielectric-material filling medium 22 on the side of the target, and it is understood that the high-dielectric-material filling medium 22 is disposed close to the gap 2121. Since the energy of the half-mode resonant cavity antenna unit 21 is mainly radiated from the slot 2121, the high dielectric material filling medium 22 is disposed close to the slot 2121, so that the effect of adjusting the offset of the radiation direction can be improved.
Optionally, in some embodiments, the half-mode resonant cavity antenna unit 21 further includes a second metal hole 214 for impedance tuning, and the second metal hole 214 is electrically connected to the first metal layer 211 and the second metal layer 212 respectively.
In the embodiment of the present application, the standing wave and the bandwidth of the antenna can be optimized by adjusting the position of the second metal hole 214, so as to improve the radiation performance of the half-mode resonant cavity antenna unit 21.
It should be understood that in other embodiments, other impedance matching circuits may be used to implement impedance tuning, which is not further limited herein, and since in the embodiment of the present application, the impedance tuning implemented by using the second metal hole 214 may be implemented by punching and electroplating processes, which is convenient for industrial production. Meanwhile, the path loss caused by energy transmission in the impedance matching circuit can be avoided.
Optionally, referring to fig. 4 to 5, in some embodiments, the number of the half-mode resonant cavity antenna units 21 is two, and openings of the two half-mode resonant cavity antenna units 21 are both disposed toward the first side 202 or the second side 203 of the fixing strap, the wearable device further includes a radio frequency chip 30, a power divider 40, and a phase shifter 50, where the radio frequency chip 30 is electrically connected to the power divider 40, the power divider 40 is electrically connected to one half-mode resonant cavity antenna unit 21, and the power divider 40 is electrically connected to the other half-mode resonant cavity antenna unit 21 through the phase shifter 50.
It should be understood that when the half-mode resonant cavity antenna unit 21 is one, the formed antenna structure is a linear polarization antenna, the polarization direction of the linear polarization antenna changes correspondingly according to the swing direction of the wearable device, and the user experience is affected by the polarization loss generated by multipath interference, multipath fading and polarization mismatch during use. For this purpose, in the embodiment of the application, two half-mode cavity antenna units 21 are further adopted to cooperate to form a circularly polarized or elliptically polarized antenna structure.
Alternatively, the power divider 40 and the phase shifter 50 are electrically connected to the half-mode cavity antenna unit 21, which can be understood as that the power divider 40 and the phase shifter 50 are electrically connected to a feed point of the half-mode cavity antenna unit 21. It should be understood that the circuit structure in fig. 5 is only for explaining the basic implementation principle of circular polarization or elliptical polarization, and thus the related matching circuit is not drawn, and it does not mean that the circuit diagram in fig. 5 is an actual schematic diagram.
Alternatively, as shown in fig. 4, in some embodiments, the slot 2121 in one of the half-mode cavity antenna units 21 is perpendicular to the slot 2121 in the other half-mode cavity antenna unit 21.
For example, the slots 2121 in the two half-mode cavity antenna units 21 may be arranged at 45 ° to the Y direction and orthogonal to each other. The electric field directions of the two slots 2121 are orthogonal to each other, i.e. the polarizations of the two half-mode resonant cavity antenna units 21 are orthogonal. At this time, if the feeding phase of the two half-mode cavity antenna units 21 is controlled to be different by 90 °, a circularly polarized antenna structure can be formed, and the radiation performance is further improved.
It should be noted that, in the embodiment of the present application, one high-dielectric material filling medium 22 may be disposed for each half-mode resonant cavity antenna unit 21, and one high-dielectric material filling medium 22 may also be disposed between the opening and the target side of the two half-mode resonant cavity antenna units 21.
Further, in order to simplify the industrial production difficulty, the first metal layer 211 of the two half-mode cavity antenna units 21 may be integrally formed, the second metal layer 212 of the two half-mode cavity antenna units 21 may be integrally formed, and the metal connection structure 213 of the two half-mode cavity antenna units 21 is partially shared, as shown in fig. 7, the metal connection structure 213 at the upper end of the lower half-mode cavity antenna unit 21 is shared with the metal connection structure 213 at the lower end of the upper half-mode cavity antenna unit 21.
Optionally, referring to fig. 6 and fig. 7, in some embodiments, the number of the half-mode resonant cavity antenna units 21 is two, an opening of one of the half-mode resonant cavity antenna units 21 is disposed toward the first side 202 of the fixing strap 20, and an opening of the other half-mode resonant cavity antenna unit 21 is disposed toward the second side 203 of the fixing strap 20, the wearable device further includes a radio frequency chip 30, a power divider 40, and a switch unit 60, the radio frequency chip 30 is electrically connected to the power divider 40, and the power divider 40 is electrically connected to any one of the two half-mode resonant cavity antenna units 21 through the switch unit 60.
In the embodiment of the present application, the two half-mode resonant cavity antenna units 21 are configured to operate in different states, for example, when a user wears the device with his left hand, one of the half-mode resonant cavity antenna units 21 may be controlled to operate by the switch unit 60; when the user wears the wearable device with the right hand, the operation of the other half-mode resonant cavity antenna unit 21 can be switched by the switch unit 60. Therefore, no matter the user is used to wear the wearing equipment by the right hand or the left hand, the radiation performance can be improved.
It should be noted that the switching manner for the operating states of the two half-mode cavity antenna units 21 may be set according to actual needs, for example, in some embodiments, the switching manner may be manually switched by a user.
In some embodiments, a gravity sensor detector may be further provided, and the gravity sensor is used to detect the wearing manner of the user, so as to control the switch unit 60 to switch to the corresponding half-mode resonant cavity antenna unit 21. Therefore, the use requirements under different wearing modes can be met simultaneously. In this embodiment, the radio frequency chip 30 or other control chips may obtain the gravity detection information output by the gravity sensing detector, so as to determine the wearing state, and finally control the switch unit to communicate the corresponding half-mode resonant cavity antenna unit 21 with the power divider 40.
Alternatively, in the embodiment of the present application, the switch unit may adopt a single-pole double-throw switch, or adopt two independent switches, which is not further limited herein.
Further, in order to simplify the industrial production difficulty, the first metal layer 211 of the two half-mode cavity antenna units 21 may be integrally formed, the second metal layer 212 of the two half-mode cavity antenna units 21 may be integrally formed, and the metal connection structure 213 of the two half-mode cavity antenna units 21 is partially shared, as shown in fig. 6, the metal connection structure 213 of the right end of the left half-mode cavity antenna unit 21 is shared with the metal connection structure 213 of the left end of the right half-mode cavity antenna unit 21.
Optionally, referring to fig. 8 to 9, in some embodiments, the number of the half-mode resonant cavity antenna units 21 is four, the wearable device further includes a radio frequency chip 30, a power divider 40, a phase shifter 50, and a switch unit 60, the radio frequency chip 30 is electrically connected to the power divider 40, the power divider 40 is electrically connected to any one of the first half-mode resonant cavity antenna unit 21A and the second half-mode resonant cavity antenna unit 21B through the switch unit 60, and the power divider 40 is electrically connected to any one of the third half-mode resonant cavity antenna unit 21C and the fourth half-mode resonant cavity antenna unit 21D through the phase shifter 50 and the switch unit 60;
the first half-mode resonant cavity antenna unit 21A and the third half-mode resonant cavity antenna unit 21C are two half-mode resonant cavity antenna units of the four half-mode resonant cavity antenna units, and openings in the first half-mode resonant cavity antenna unit 21A and the third half-mode resonant cavity antenna unit 21C are arranged toward the first side 202 of the fixing band; the second half-mold resonator antenna unit 21B and the fourth half-mold resonator antenna unit 21D are two other half-mold resonator antenna units of the four half-mold resonator antenna units, and openings in the second half-mold resonator antenna unit 21B and the fourth half-mold resonator antenna unit 21D are disposed toward the second side 203 of the fixing band 20.
In the embodiment of the present application, the first half-mode cavity antenna unit 21A and the third half-mode cavity antenna unit 21C may work simultaneously to cooperate to form the elliptically or circularly polarized antenna 1. The second half-mode cavity antenna unit 21B and the fourth half-mode cavity antenna unit 21D may operate simultaneously to cooperate to form the elliptically or circularly polarized antenna 2. The antenna 1 and the antenna 2 are configured to operate in different states, for example, when a user wears the wearable device with his left hand, the first half-mode resonant cavity antenna unit 21A and the third half-mode resonant cavity antenna unit 21C may be controlled to operate by the switch unit 60; when the user wears the wearable device with the right hand, the operation can be switched by the switch unit 60 to the second half-mode resonator antenna unit 21B and the fourth half-mode resonator antenna unit 21D. Therefore, no matter the user is used to wear the wearing equipment by the right hand or the left hand, the radiation performance can be improved.
Alternatively, in the embodiment of the present application, the switch unit may adopt a double-pole double-throw switch, or adopt two independent switches, which is not further limited herein.
Further, in some embodiments, the slot in the first half-mode cavity antenna unit 21A and the slot in the third half-mode cavity antenna unit 21C are disposed vertically;
and/or a slot in the second half-mold resonator antenna unit 21B and a slot in the fourth half-mold resonator antenna unit 21D are vertically disposed. The switch unit is used for controlling
In this embodiment, the first half-mode resonant cavity antenna unit 21A and the third half-mode resonant cavity antenna unit 21C may form a circularly polarized antenna, and the second half-mode resonant cavity antenna unit 21B and the fourth half-mode resonant cavity antenna unit 21D may form a circularly polarized antenna. Therefore, multipath interference and multipath fading in the transmission process of electromagnetic waves can be inhibited, polarization loss caused by mismatching of polarization is reduced, and the use experience of a user is improved.
It should be noted that, the above embodiment may be referred to for the control manner of the switch unit 60, and the difference from the above embodiment is that, in this embodiment, the switch unit 60 is used to control the four half-mode cavity antenna units 21 to be in any one of the following states:
the first half-mode resonant cavity antenna unit 21A is communicated with the power divider 40, and the third half-mode resonant cavity antenna unit 21C is communicated with the phase shifter 50;
the second half-mode cavity antenna unit 21B is in communication with the power divider 40, and the fourth half-mode cavity antenna unit 21D is in communication with the phase shifter 50.
Optionally, in some embodiments, the wearable device is a watch, and the fixing band 20 is a watch band.
Optionally, the fixing strap 20 is a watch strap located at the bottom end of the watch face.
In the embodiment of the present application, the number of the watchband may be one or two, and when the number of the watchband is one, the half-mode cavity antenna unit 21 and the high dielectric material filling medium 22 are disposed on a portion of the watchband located at the bottom end of the watch dial. When the number of the watchbands is two, one watchband at the bottom end of the watch dial is provided with the half-mode resonant cavity antenna unit 21 and the high dielectric material filling medium 22. In the following embodiments, the case where two bands are present will be described.
For example, in some embodiments, the bottom end of the dial plate of the watch may be understood as being close to one end of the 6-point scale mark, assuming that the dial plate is provided with marks corresponding to the clock, for example, including a 3-point scale mark, a 6-point scale mark, a 9-point scale mark and a 12-point scale mark.
Further, in order to simplify the difficulty of industrial production, the first metal layer 211 of the four half-mode cavity antenna units 21 may be integrally formed, and the second metal layer 212 of the four half-mode cavity antenna units 21 may be integrally formed. In addition, the metal connection structures 213 of adjacent half-mode cavity antenna units 21 may be partially shared, as shown in particular in FIG. 8.
Optionally, referring to FIG. 10, in some embodiments, a resonant cavity antenna unit 70 may also be provided on another watch band for better control of the watch band.
In the embodiment of the present application, the half-mode cavity antenna unit 21 may be understood as a half of the cavity antenna unit 70, in other words, the cavity antenna unit 70 is different from the half-mode cavity antenna unit 21 in that the metal cavity in the cavity antenna unit 70 is surrounded by metal connection structures on four sides.
Alternatively, in some embodiments, the cavity antenna unit 70 may be configured as a dual-frequency antenna, for example, by setting values of a length a of the metal cavity of the cavity antenna unit 70 in the X direction and a length b of the metal cavity of the cavity antenna unit 70 in the Y direction, the resonant frequency of the primary mode of the metal cavity of the cavity antenna unit 70 is set at the f1 frequency point, and the secondary mode is set at the f2 frequency point. By forming two orthogonal slots in the second metal layer of the resonant cavity antenna unit 70, the electric fields at two frequency points can be radiated out from the two slots, respectively, thereby forming a dual-frequency antenna system. By optimizing the size and relative position of the two slots and the position of the tuning metal hole (i.e., the second metal hole), the reflection coefficient of the antenna can be optimized so that the S-parameters of the antenna at the frequencies f1 and f2 meet the design requirements.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A wearable device, comprising: the device comprises a device body and a fixing band, wherein the device body is connected with the fixing band, the fixing band is provided with a half-mode resonant cavity antenna unit and a high-dielectric material filling medium,
the half-mode resonant cavity antenna unit comprises a first metal layer, a second metal layer and a metal connecting structure, the distance from the first metal layer to the back surface of the fixing band is smaller than the distance from the second metal layer to the back surface of the fixing band, the metal connecting structure is respectively connected with the first metal layer and the second metal layer, the first metal layer, the second metal layer and the metal connecting structure enclose to form a metal resonant cavity with one side opened, the opening of the metal resonant cavity faces to the target side edge of the fixing band, and a gap for radiation is formed in the second metal layer;
the high-dielectric material filling medium is arranged between the target side and the opening of the metal resonant cavity;
the target side is a first side or a second side, and the first side and the second side are two opposite sides arranged along the length direction of the fixing belt.
2. The wearable device according to claim 1, wherein the metal connection structure comprises a plurality of first metal holes arranged at intervals, one end of each first metal hole is electrically connected with the first metal layer, and the other end of each first metal hole is electrically connected with the second metal layer.
3. The wearable device according to claim 1, wherein a perpendicular projection of the slit on the target side is located within a perpendicular projection of the high dielectric material filled medium on the target side.
4. The wearable device of claim 1, wherein the half-mode resonant cavity antenna unit further comprises a second metal hole for impedance tuning, the second metal hole being electrically connected to the first metal layer and the second metal layer, respectively.
5. The wearable device according to any one of claims 1 to 4, wherein the number of the half-mode resonant cavity antenna units is two, and openings of the two half-mode resonant cavity antenna units are both disposed toward the first side or the second side of the fixing strap, the wearable device further comprises a radio frequency chip, a power divider, and a phase shifter, the radio frequency chip is electrically connected to the power divider, the power divider is electrically connected to one half-mode resonant cavity antenna unit, and the power divider is electrically connected to the other half-mode resonant cavity antenna unit through the phase shifter.
6. The wearable device of claim 5, wherein the slot in one of the half-mode resonator antenna units is disposed perpendicular to the slot in the other of the half-mode resonator antenna units.
7. The wearable device according to any one of claims 1 to 4, wherein the number of the half-mode resonant cavity antenna units is two, and an opening of one of the half-mode resonant cavity antenna units is disposed toward a first side of the strap, and an opening of the other half-mode resonant cavity antenna unit is disposed toward a second side of the strap, the wearable device further comprises a radio frequency chip, a power divider, and a switch unit, the radio frequency chip is electrically connected to the power divider, and the power divider is electrically connected to any one of the two half-mode resonant cavity antenna units through the switch unit.
8. The wearable device according to any one of claims 1 to 4, wherein the number of the half-mode resonant cavity antenna units is four, the wearable device further comprises a radio frequency chip, a power divider, a phase shifter, and a switch unit, the radio frequency chip is electrically connected to the power divider, the power divider is electrically connected to any one of the first half-mode resonant cavity antenna unit and the second half-mode resonant cavity antenna unit through the switch unit, and the power divider is electrically connected to any one of the third half-mode resonant cavity antenna unit and the fourth half-mode resonant cavity antenna unit through the phase shifter and the switch unit;
the first half-mode resonant cavity antenna unit and the third half-mode resonant cavity antenna unit are two half-mode resonant cavity antenna units in the four half-mode resonant cavity antenna units, and openings in the first half-mode resonant cavity antenna unit and the third half-mode resonant cavity antenna unit are arranged towards the first side edge of the fixing band; the second half-mode resonant cavity antenna unit and the fourth half-mode resonant cavity antenna unit are two other half-mode resonant cavity antenna units of the four half-mode resonant cavity antenna units, and openings in the second half-mode resonant cavity antenna unit and the fourth half-mode resonant cavity antenna unit are arranged towards the second side edge of the fixing band.
9. The wearable device of claim 8, wherein the slot in the first half-mode cavity antenna unit and the slot in the third half-mode cavity antenna unit are disposed vertically;
and/or the slot in the second half-mode resonant cavity antenna unit and the slot in the fourth half-mode resonant cavity antenna unit are vertically arranged.
10. The wearable device according to claim 1, wherein the wearable device is a watch and the securing strap is a watchband.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211214962.8A CN115548663A (en) | 2022-09-30 | 2022-09-30 | Wearable device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211214962.8A CN115548663A (en) | 2022-09-30 | 2022-09-30 | Wearable device |
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| CN115548663A true CN115548663A (en) | 2022-12-30 |
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| CN202211214962.8A Pending CN115548663A (en) | 2022-09-30 | 2022-09-30 | Wearable device |
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| US20040104852A1 (en) * | 2002-11-29 | 2004-06-03 | Choi Won Kyu | Microstrip patch antenna and array antenna using supertrate |
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